Preparation method of gamma-alumina powder

The invention discloses a preparation method of gamma-alumina powder. The preparation method comprises the following steps: using active carbon fibers with a developed pore structure to absorb an inorganic aluminum salt solution, drying, then neutralizing the active carbon fibers with a weak alkaline amine solution, drying, and burning the active carbon fibers so as to obtain the gamma-alumina powder. The obtained gamma-alumina powder has the following properties: the primary particle size is in a range of 5 to 15 nm, the pore volume is 0.4 to 0.7 mL/g, and the specific surface area is 200 to 400 m<2>/g. The preparation method has the advantages of simple technology, short preparation period, no washing step, and no wastewater discharge.

Pseudo-boehmite and preparation method thereof

The invention discloses pseudo-boehmite and a preparation method thereof. The pseudo-boehmite provided by the invention has the following properties: 1.0 lt; p1 < = 1.5, 1.5 lt; p2 < = 1.8, P1 = D (120)/D (031), and P2 = D (120)/D (020); the 120 peak is a characteristic peak of which the 2theta is 25.5 to 29.9 in an XRD (X-Ray Diffraction) spectrogram; the 031 peak is a characteristic peak of which the 2theta is 36.3 to 40.5 in an XRD (X-Ray Diffraction) spectrogram; the 020 peak refers to a characteristic peak with 2 theta being 12.0-16.2 in an XRD spectrogram, D = K lambda/(Bcos theta), K is a Scherrer constant, lambda is a diffraction wavelength of a target material, B is a half peak width of a diffraction peak, and theta is a diffraction angle; the preparation method of the pseudo-boehmite comprises the following steps: mixing gamma-phase aluminum oxide powder, epoxypropane and water, and then carrying out hydration treatment to obtain the pseudo-boehmite. According to the preparation ...

Ultrasonic-microwave synergetic extracted cornel iridoid glycoside, as well as extraction and determination method thereof

The invention provides a method for extracting cornel iridoid glycoside by virtue of ultrasonic-microwave synergetic extraction. The method comprises the following steps: (1) preparing cornus officinalis coarse powder; (2) adding the cornus officinalis coarse powder into a 80% methanol solution in a material-liquid ratio of (1:5)-(1:25), sealing, weighing and determining the weight, connecting a condensing device, and extracting for 3-15 minutes with microwave power of 300-700W and ultrasonic powder of 120-600W to obtain an extract; (3) carrying out suction filtration on the extract to obtain filtrate, keeping the constant volume, filtering, concentrating, drying and purifying to obtain the cornel iridoid glycoside. A method for determining the cornel iridoid glycoside comprises the following steps: a, preparing a mixed reference substance solution; b, preparing a test substance solution; c, determining the contents of morroniside, loganin, sweroside and cornel iridoid glycoside in the ...

Multi-head automatic filling system and filling method

The invention discloses a multi-head automatic filling system for batch filling of liquid wax. The multi-head automatic filling system comprises a production line, and a plurality of filling mechanisms arranged in the production line in sequence, wherein the filling mechanisms comprise filling devices and filling platforms; weight sensors for detecting the filling metering are arranged on the bottom surfaces of the filling platforms; the filling devices are arranged above the filling platforms; and the production line comprises lifting conveying chains symmetrically arranged at the two sides of the filling platforms and used for sending tanks into or outside the production line. The multi-head automatic filling system further comprises a controller unit, wherein the controller unit is electrically connected with the filling devices, the weight sensors and the lifting conveying chains respectively. The multi-head automatic filling system, disclosed by the invention, can change manual operation ...

Process for drilling cobble layer using crowned bit and basket

The present invention uses combined operation of valved impact awl, basket and towered impact awl. Large amount of cobbles are removed directly by basket to obtain low consumption and high speed. Compared with convential method, the efficiency is raised by 3-4 times, and there is no collapsed-hole phenomenon. Furthermore, drilled holes has verticality less than 1%.

ALUMINA SUPPORTER MATERIAL AND PREPARATION METHOD THEREOF, HYDROGENATION CATALYST AND RESIDUAL OIL HYDROGENATION PROCESSING

The supporter material for catalyst includes a main body alumina and a rod-shaped alumina. The main body alumina is provided with micron-sized pore channels, at least part of the rod-shaped alumina is distributed on the exterior surface of the main body alumina and/or in the micron-sized pore channels with a pore diameter D within a range of 3-10 μm; the rod-shaped alumina has a length of 1-12 μm and a diameter of 80-300 nm. The alumina supporter material is used as a residual oil hydrogenation catalyst supporter to facilitate a long period operation of the residual oil hydrogenation, and has high demetalization rate, desulfurization rate and denitrification rate. 1. An alumina supporter material , wherein comprising a main body alumina and a rod-shaped alumina; the main body alumina is provided with micron-sized pore channels , at least part of the rod-shaped alumina is distributed on the exterior surface of the main body alumina and/or in the micron-sized pore channels with a pore diameter D within a range of 3-10 μm; the rod-shaped alumina has a length of 1-12 μm and a diameter of 80-300 nm.2. The supporter material of claim 1 , wherein the length of the rod-shaped alumina distributed in the micron-sized pore channel is mainly 0.3 D-0.9 D; the length of the rod-shaped alumina distributed on the exterior surface of the main body alumina is primarily 3-8 μm.3. The supporter material of claim 1 , wherein the supporter material has a specific surface area of 140-350 m2/g claim 1 , a pore volume of 0.6-1.5 mL/g claim 1 , and a crush strength of 9-22 N/mm.4. The supporter material of claim 1 , wherein the pore distribution of the supporter material is as follows: the sum of the pore volumes of pores with a pore diameter below 10 nm accounts for less than 15% of the total pore volume claim 1 , the sum of the pore volumes of pores with a pore diameter more than 10 nm and less than 35 nm accounts for 30%-75% of the total pore volume claim 1 , the sum of the pore volumes ...

Automatic cutting device

The utility model provides an automatic cutting device, including circuit system, transfer system and cutting system, circuit system respectively with transfer system with cutting system drive electricity is connected, circuit system includes detection mechanism, the cutting system basis detection mechanism's testing result is right the material of transfer system conveying cuts, transfer system includes driving motor and conveying pole, the conveying pole fixed connection be in on driving motor's the output shaft, and the conveying pole with the coaxial setting of output shaft. According to the utility model provides a technical scheme has realized the transport of material through driving motor and conveying pole to testing result according to detection mechanism is cut the material that conveys, has improved production efficiency effectively, has also avoided the unneccessary loss of equipment and material.

Preparation method of nylon boron nitride nano composite material

The invention discloses a preparation method of a nylon boron nitride nano composite material, and belongs to the technical field of nylon composite materials, a PA6/f-BN composite material with good thermal conductivity is prepared, the existence of BN-g-PA6 is proved from the result of FTIR spectrum, boron nitride in the PA6/f-BN composite material is analyzed from the microstructure to be good in dispersity, and the thermal conductivity of the PA6/f-BN composite material is greatly improved. And the connection between the BN and the matrix is tighter. Therefore, the applied heat-conducting filler can form a continuous heat-conducting network and a passage under low-content filling, and the interface heat loss is reduced. The thermal conductivity of the nylon composite material is increased along with the increase of the BN content, and under the condition that the f-BN content is 5wt%, the thermal conductivity of the PA6/f-BN composite material is 0.50 Wm <-1 > K <-1 >, and is respectively ...

Regeneration method of deactivated catalyst

The invention discloses a regeneration method of a deactivated catalyst, which comprises the following steps: (1) deoiling, roasting and crushing the deactivated catalyst to obtain a pretreated material; (2) placing the pretreated material in an epoxypropane solution, carrying out heat treatment under a closed condition, removing a liquid phase from the treated material, and drying to obtain an activated powder material A; (3) mixing, kneading and molding the activated powder material A and pseudo-boehmite, drying and roasting to obtain a material B; (4) carrying out acid treatment and alkali treatment on the material B, and drying to obtain a material C; and (5) impregnating the material C with a hydrogenation active component impregnation liquid to obtain the regenerated hydrogenation catalyst. According to the method, the hydrogenation catalyst is prepared by taking the activated material as part of the raw material through activation treatment, so that the recycling of a waste agent ...

Fan time delay control circuit

The invention relates to a fan time delay control circuit which is formed by connecting an input end circuit, a time delay circuit, a comparison circuit, an optically coupled isolation circuit and an execution circuit, wherein the input end circuit includes an operation amplifier U1A, the time delay circuit is composed of a resistor R1, an electrolytic capacitor E1, and a capacitor C2; the comparison circuit is composed of resistors R1, R2 and R6, a capacitor C3 and a comparison amplifier U2A; the optically coupled isolation circuit is composed of a resistor R3 and an optically coupled isolation device O1; and the execution circuit includes resistors R4, R5, a capacitor C1, a diode D1, a triode Q1 and a fan control end CN1. The circuit of the invention has simple structure, is reasonably designed, is suitable for requirements of various time delay time parameters, and has low manufacture cost, strong applicability and stable and reliable performance; and by using the control circuit, the ...

Hydrodesulfurization catalyst and preparation method thereof

The invention discloses a hydrodesulfurization catalyst and a preparation method thereof, the catalyst comprises a hydrogenation active metal component and a phosphorus modified alumina carrier, the phosphorus modified alumina carrier is a composite carrier of flake alumina and granular alumina, and phosphorus is loaded on the flake alumina. The preparation method of the hydrodesulfurization catalyst comprises the following steps: (1) impregnating pseudo-boehmite P1 with a phosphorus-containing compound solution, drying and roasting to prepare phosphorus-modified gamma-phase alumina powder; (2) mixing the phosphorus-modified aluminum oxide powder with an epoxy propane aqueous solution, carrying out hydrothermal treatment, carrying out liquid-solid separation, and drying to obtain phosphorus-modified flaky pseudo-boehmite P2; and (3) carrying out kneading molding on the phosphorus-modified flaky pseudo-boehmite P2 and the pseudo-boehmite P1, drying, roasting, and then loading a hydrogenation ...

FIBROUS IM-5 MOLECULAR SIEVE AND PREPARATION PROCESS THEREOF

The present invention provides a fibrous IM-5 molecular sieve and the preparation process thereof. According to the process according to the present invention, by adding an appropriate amount of a quaternary ammonium salt with a long carbon chain to the preparation system so as to occur a synergistic action with the organic templet agent, an IM-5 molecular sieve which would be otherwise a rodlike form is converted into the fibrous form. The IM-5 molecular sieve according to the present invention has an aspect ratio greater than that of the rodlike IM-5 molecular sieve obtained according to the prior art, such that the proportion of the exposed periphery crystal face is higher, which benefit to increasing the selectivity of the catalytic reaction for the corresponding crystal face.

Fishing bait and its preparing method

The present invention relates to a fishing bait applicable to fishes of common carp, grass carp and crusian carp. It is formed from the following raw materials; (by weight portion) soybean, daqu liquor, honey, musk, monosodium glutamate, shrimp meal, corn flour and fish powder according to the ratio of 1:(0.05-0.07):(0.1-0.15):(0.000001-0.0001):(0.001-0.0015):(0.01-0.02):(0.02-0.03):(0.04-0.05). Said invention also provides its preparation method and concrete steps.

Novel corn husker

The invention provides a novel corn husker. The husker comprises a frame, a husking unit, a motor, a transmission unit and an air blower, wherein the husking unit is installed above the frame; the left side of the top part of the husking unit is provided with a feed inlet while the right side is provided with a feed outlet; the husking unit is downward tilted from feed inlet to feed outlet; the interior of the husking unit is provided with a main transmission roller and two auxiliary transmission rollers; the main transmission roller is a steel husking roller; the two auxiliary transmission rollers are rubber husking rollers and are located at two ends of the main transmission roller; the main transmission roller and the two auxiliary transmission rollers are successively arranged in parallel and engaged via gearwheels; the motor is connected with the main transmission roller via the transmission unit; the air blower is connected with the lower end of the husking unit via a ventilation ...

Application of cornus officinalis total saponins to diabetes mellitus resistance

The invention discloses application of cornus officinalis total saponins in cornus officinalis to diabetes mellitus resistance and belongs to the technical field of biological medicine. The cornus officinalis total saponins which are main active ingredients extracted from the cornus officinalis can be used for preparing medicine for treating diabetes mellitus, the problems that western medicine has a single blood sugar reducing way and large side effects are solved, and a basis is provided for reducing blood sugar through active ingredients of Chinese medicine. The cornus officinalis total saponins are safer, more effective, mild, durable and free of toxic and side effects, has a multi-effect, multi-target and multifunctional action mechanism, has the effect of reducing blood sugar and also plays an important role in preventing and treating diabetic complications. Thus, the cornus officinalis total saponins have considerable development and application value in the aspect of improving diabetes ...

Personnel head portrait information acquisition method

The invention belongs to the technical field of information acquisition, and particularly relates to a personnel head portrait information acquisition method, which comprises the following steps: acquiring a personnel head portrait acquisition model, and setting the size and background color of a head portrait; obtaining a head portrait initial picture of a to-be-processed person, and preliminarily predicting the quality of the head portrait picture of the person through the obtained model; calculating a head position; cutting into proper sizes; acquiring a mask; according to the method, the head area in the head portrait picture of the person can be judged, so that the size of the head area is obtained, the initial picture is cut, and the human body feature information occupies the main body position in the cut picture and does not deform; and meanwhile, human body feature information in the cut image can be accurately identified, so that color replacement of the background area is realized ...

Heavy oil hydrodemetallization catalyst and preparation method thereof

The invention discloses a heavy oil hydrodemetallization catalyst and a preparation method thereof. The heavy oil hydrodemetallization catalyst comprises active metal components and a spherical core-shell alumina carrier, the active metal components comprise Mo, Co, Ni and V, the Co and the V are distributed in the shell layer of the alumina carrier, the content of the Mo and the Ni in the shell layer is higher than the content of the Mo and the Ni in a nuclear phase, the thickness of the shell layer is 0.1 r-0. 3r, and r is the radius of the alumina carrier; the preparation method comprises the following steps: (1) preparing an alumina carrier material with a core-shell structure; (2) impregnating the carrier material in the step (1) with an impregnation liquid I, and drying and roasting the impregnated material; and (3) impregnating the material obtained in the step (2) in the impregnation liquid II, and drying and roasting the impregnated material to obtain the hydrodemetallization catalyst ...

PVC (polyvinyl chloride) combined template and cross beam construction method thereof

The invention relates to the technical field of constructional engineering, in particular to a PVC combined formwork and a cross beam construction method.The PVC combined formwork comprises a shell and supporting screw rods, the shell is provided with a rectangular bottom formwork, side formworks perpendicular to the bottom formwork are arranged on the four edges of the bottom formwork, and a rigidity enhancing structure is further arranged on one side face of the bottom formwork; the rigidity enhancing structure comprises a plurality of annular first reinforcing ribs and second reinforcing ribs which are different in diameter, and steel wire meshes are embedded in the bottom formwork and the side formworks. A round groove is formed in the center of the other side face provided with the bottom formwork, a threaded through hole is formed in the bottom of the groove and penetrates through the bottom formwork, a top plate matched with the groove is arranged on the supporting screw rod, and ...

Application of dogwood nano powder to resist type-2 diabetes

The invention discloses application of dogwood nano powder to resist type-2 diabetes, and belongs to the technical field of biological medicine. According to the application, nano pulverization is conducted on dogwood medicinal materials, the processed dogwood medicinal materials can be used for preparing medicine for treating the diabetes, the problems that western medicine is singular in blood glucose lowering way, large in side effects and the like, and a basis for lowering the blood glucose through active ingredients of the traditional Chinese medicine is provided. A dogwood iridoid glycoside is safer, more effective, moderate, lasting in effect and free of toxic and side effect, the action mechanism is multiple in effect, multiple in target spot and multiple in function, the effect is not only limited to lowering the blood glucose, meanwhile the dogwood nano powder is significant in preventing and curing the diabetic complication, and therefore, the dogwood nano powder has considerable ...

Signal processing method of single frequency network system and device thereof

The invention discloses a single frequency network system device in a mobile multimedia broadcasting system and a signal processing mode in the single frequency network system. The method comprises the following steps: evenly dividing each time unit into N time slots; dividing each time slot of the divided N time slots into two parts, and inserting an SIP packet into a first half part of a first time slot of each time unit; inserting a TS data packet into a latter half part of the time slot of each time unit, adding the TS data packet and the SIP packet on the input basic data and performing code rate adaption by a single frequency network adaptive module in the single frequency network system device; and allowing a digit driver module to detect and reject the SIP packet for the received TS data flow containing the SIP packet, and performing channel coding and matched design. The invention has the effect of improving pure transmission code rate.

A HOLLOW IM-5 MOLECULAR SIEVE SPHERE AND THE PREPARATION PROCESS THEREOF

Provided are hollow spherical zeolite IM-5 and a preparation method therefor. A cation quaternary ammonium salt surfactant having a long carbon chain is added to an zeolite IM-5 preparation system, where the molar ratio of a template agent/the surfactant is between approximately 0.3 and approximately 4.5, and hollow spherical zeolite IM-5 is generated via the micelle effect of the surfactant. The structure facilitates material mass transfer of a reaction process.

Hydraulic control system and hydraulic control method

The invention discloses a hydraulic control system and a hydraulic control method to solve the problems that an engine of the hydraulic control system has high model selection limitation, or the system has complicated pipelines, high heat productivity, many fault sources, not ideal micromotion performance of motions and the like in the prior art. The hydraulic control system comprises a first closed pump and a first engine connected with each other, a second closed pump and a second engine connected with each other, and a hydraulic motor, wherein the first closed pump, a second closed pump and the hydraulic motor are connected in parallel. Through the technical scheme, the hydraulic control system has the advantages of wider engine model selection range, higher reliability and better micromotion performance.

Voice emotion conversion method and device, equipment and storage medium

The invention relates to an artificial intelligence technology, and provides a voice emotion conversion method and device, equipment and a storage medium, and the method comprises the steps: encoding an input original voice signal into a first discrete pronunciation unit sequence with original emotion; converting the first discrete pronunciation unit sequence into a second discrete pronunciation unit sequence with a target emotion according to the target emotion label; on the basis of the target emotion tag, rhythm feature prediction is carried out on the second discrete pronunciation unit sequence, predicted rhythm features are obtained, and the predicted rhythm features comprise predicted duration and predicted fundamental frequency; and synthesizing a target emotion voice signal according to the target emotion tag, the second discrete pronunciation unit sequence, the predicted rhythm feature and the speaker identity tag of the original voice signal. The spoken language audio is discretized ...

A HOLLOW IM-5 MOLECULAR SIEVE SPHERE AND THE PREPARATION PROCESS THEREOF

Provided are hollow spherical zeolite IM-5 and a preparation method therefor. A cation quaternary ammonium salt surfactant having a long carbon chain is added to an zeolite IM-5 preparation system, where the molar ratio of a template agent/the surfactant is between approximately 0.3 and approximately 4.5, and hollow spherical zeolite IM-5 is generated via the micelle effect of the surfactant. The structure facilitates material mass transfer of a reaction process.

A FIBROUS IM-5 MOLECULAR SIEVE AND THE PREPARATION PROCESS THEREOF

The present invention provides a fibrous IM-5 molecular sieve and the preparation process thereof. According to the process according to the present invention, by adding an appropriate amount of a quaternary ammonium salt with a long carbon chain to the preparation system so as to occur a synergistic action with the organic templet agent, an IM-5 molecular sieve which would be otherwise a rodlike form is converted into the fibrous form. The IM-5 molecular sieve according to the present invention has an aspect ratio greater than that of the rodlike IM-5 molecular sieve obtained according to the prior art, such that the proportion of the exposed periphery crystal face is higher, which benefit to increasing the selectivity of the catalytic reaction for the corresponding crystal face.

Three-dimensional tailing pond seepage system and seepage method thereof

The invention discloses a three-dimensional tailing pond seepage system and a seepage method thereof, and the system and the method are used for solving the problem of common tailing pond seepage effect in the prior art. The three-dimensional tailing pond seepage system comprises a flexible permeable hose vertical to a dam axis and a horizontal drain pipe parallel to the dam axis, wherein the inner end of the flexible permeable hose is communicated with the horizontal drain pipe. The flexible permeable hose, the horizontal drain pipe, a bank slope seepage body and a pond bottom seepage body are utilized for collecting water or separately collecting water, and water in the seepage system is guided out of a dam. The system can be used for cleaning and dredging, can be arranged and built in a tailing pond design stage and constructed in an operating stage, can be used for thoroughly solving the tailing pond seepage problem from the design, construction and operating stages, and is good in ...

Wireless sensor network positioning method based on signal intensity mapping

The invention relates to a wireless sensor network positioning method based on signal intensity mapping. The method aims at solving the problem that errors are large when the distance is estimated through a signal transmission model, so that positioning accuracy is low. The method includes the steps that firstly, M anchor nodes are deployed in a positioning area; secondly, signal intensity data of wireless communication between an unknown node to all the anchor nodes are recorded on position sampling points i in the positioning area; thirdly, the mean value RSSIki-u and variance statistical information RSSIki-d of signal intensity of wireless communication between the position sampling points i to the M anchor nodes are calculated; fourthly, in the actual positioning process, the minimum distance value Dc is selected from {Di}, and the position information (xc, yc) of the position sampling point corresponding to the minimum distance value Dc serves as an estimated value of the position ...

Light-emitting end low power consumption drive circuit in optical fiber transmission of electronic mutual inductor

The invention discloses a light-emitting end low power consumption drive circuit in optical fiber transmission of an electronic mutual inductor, which comprises a triode, wherein the base electrode of the triode is connected with the output end of a control signal through a resistor, the emitting electrode of the triode is connected with a power supply through an adjustable resistor, and the collector electrode of the triode is grounded after connected with a light-emitting module. The drive circuit adopted in the invention has simple structure, required working voltage and working current are reduced to ensure that the power consumption of the drive circuit is greatly reduced, and meanwhile, the requirement for high transmission of a high-voltage side data acquisition system is met to ensure that the power consumption of the high-voltage side data acquisition system is greatly reduced and the reliability is enhanced. The drive circuit ensures that the working current of the light-emitting ...

Multifunctional oven convenient for baking sliced food materials

The multifunctional oven comprises a shell, a heat insulation protection plate, an electric control plate, a first heating pipe assembly and a second heating pipe assembly, the heat insulation protection plate and the electric control plate are arranged in the shell and located on one side of the shell, the first heating pipe assembly is arranged at the top of the shell, and the second heating pipe assembly is arranged at the bottom of the shell. A first opening is formed in the front portion of the shell, a second opening is formed in the front portion of the shell, a movable door plate with the first opening and the second opening closed alternately is further arranged on the shell, the shell, the heat insulation protection plate and the movable door plate form a cooking cavity used for baking food, two baking nets capable of being opened and closed are further arranged on the two sides of the first opening, and a pop-up support capable of moving up and down is arranged between the two ...

Rhythm labeling model, rhythm prediction model training method and related equipment

According to the rhythm labeling model training method and the related equipment provided by the embodiment of the invention, the text sequence is input into the text encoder, and the text encoding vector is output; inputting a phoneme sequence into the phoneme encoder, and outputting a phoneme encoding vector; inputting the Mel spectrum into a spectrum encoder, and outputting a spectrum encoding vector; carrying out fusion processing on the text coding vector, the phoneme coding vector and the frequency spectrum coding vector; inputting the fusion feature vector into the self-attention network, and outputting a prediction rhythm tag sequence; according to the mode, the multi-modal data is extracted as input according to the audio data, richer rhythm information is provided for the rhythm labeling task, and the labeling precision of the rhythm labeling model obtained through training is high; according to the rhythm prediction model training method and the related equipment provided by ...

Electromagnetic adsorption type racket and preparation method thereof

The invention provides an electromagnetic adsorption type racket. The top of a racket mesh frame of the racket is provided with a groove, an electromagnet is arranged in the groove, a magnet cable conductor is arranged inside the racket mesh frame and a racket rod and is connected with an electromagnet control push-button switch arranged at the upper end of a racket handle, the racket handle is hollow, the inside of the racket handle is provided with a battery case for placing a dry battery, and the bottom end of the racket handle is provided with a cover plate of the battery case. A method has the following steps: molds of various components are manufactured, and casting forming or other processing formings and assemblies are performed. The racket has the advantages that the racket has simple structure, scientific design, flexible control, larger practicability and convenience, increases the interest of sports, is economical and practical, and is suitable to be widely popularized.

Preparation method of hydrotreatment catalyst

The invention discloses a preparation method of a hydrotreatment catalyst. The method comprises the following process: first preimpregnating an alumina carrier with an ammonium salt solution; then heating the impregnated alumina carrier in a sealed container; and finally loading an active component and an auxiliary agent onto the treated alumina carrier, and drying and roasting to obtain the hydrotreatment catalyst. The method can effectively pretreat the carrier, improve physicochemical properties of the carrier, especially the chemical properties of the surface of the carrier, and enable the active metal component to uniformly distribute on the carrier, so as to prepare the hydrotreatment catalyst with high activity.

Aluminum oxide material with core-shell structure and preparation method thereof

The invention discloses an aluminum oxide material with a core-shell structure and a preparation method of the aluminum oxide material. The aluminum oxide material is spherical, a nuclear phase is a granular small-grain aluminum oxide aggregate, a shell layer is a flaky large-grain aluminum oxide aggregate, and the thickness of the shell layer is 0.3 r to 0.7 r. And the area sum of the (100) crystal face and the (111) crystal face of the flaky large-grain aluminum oxide accounts for 30-40% of the total area of the flaky large-grain aluminum oxide. The preparation method comprises the following steps: (1) mixing pseudo-boehmite with a physical pore-enlarging agent, and carrying out rolling ball molding to obtain a spherical precursor S1; (2) mixing the gamma-phase aluminum oxide powder with an epoxy propane aqueous solution, and then carrying out sealing heat treatment to obtain a flaky large-grain pseudo-boehmite material W1; and (3) mixing the material W1 with the spherical precursor S1 ...

Bathroom cabinet rotating on toilet

The invention relates to bathroom accessories, and particularly relates to a bathroom cabinet rotating on a toilet. The bathroom cabinet with a water tank rotates on the toilet under the condition that the function of the toilet is not affected by combination, so that the effects that the floor area is small, the toilet is rinsed by wastewater and a plurality of functions are simultaneously used are achieved.

Magnetic torquer electric simulator with function of fault simulation

The invention discloses a magnetic torquer electric simulator with a function of fault simulation, and relates to the field of satellite simulation tests. The invention solves a problem that a conventional mini satellite attitude control system is short of a device for simulating a fault function of a magnetic torquer. Three TTL receiving interfaces are respectively connected with three input ends of an input signal isolation circuit, and three output ends of the input signal isolation circuit are respectively connected with three input ends of an FPGA. The output end of a G485 fault receiving interface is connected with the input end of the FPGA, and the FPGA is sued for analyzing the type of a fault and achieving the pulse width collection and time delay of three-channel fault data. The three output ends of the FPGA are respectively connected with three input ends of an output signal isolation circuit, and three output ends of the output signal isolation circuit are respectively connected ...

Multistage cooling production line and cooling control method

The invention discloses a multistage cooling production line for liquid wax. The liquid wax is injected in a tank to form a wax tank. The multistage cooling production line comprises a volatilization area and a solidification area, wherein the volatilization area is used for delivering the wax tank, and performing complete solvent volatilization on the liquid wax to form volatilized liquid wax; the solidification area is used for continuing delivering the wax tank, and completely cooling the volatilized liquid wax to form solidified liquid wax. The multistage cooling production line is used for performing solvent volatilization and cooling solidification on the injected liquid wax, and the solvent volatilization and cooling solidification of the liquid wax are implemented in stages, so that the complete solvent volatilization and complete cooling solidification of the liquid wax can be implemented within a short time; the quality of a product is ensured, and meanwhile, the cooling efficiency ...

Power grid frequency modulation operation state evaluation method and system

The invention relates to the technical field of electric power technical supervision, and provides a power grid frequency modulation operation state evaluation method and system, and the method comprises the steps: carrying out the frequency modulation state influence parameter analysis of a power grid frequency modulation historical database; obtaining a frequency modulation fault event set based on the frequency modulation state influence parameter; obtaining a fault factor according to the frequency modulation fault event set; determining a frequency modulation state top event according to the power grid frequency modulation operation specification information; determining a fault factor corresponding to the frequency modulation state top event; and based on the fault factor corresponding to the frequency modulation state top event and the power grid frequency modulation historical database, determining a fault factor logic relationship, establishing a frequency modulation operation ...

Synthetic method of titanium dioxide photocatalyst

The invention discloses a synthetic method of a titanium dioxide photocatalyst. According to the synthetic method, titanium oxide nanocrystals are synthesized via solvothermal method, wherein in synthetic processes, a long-chain alkane or an alkene is taken as a solvent, an organic titanium salt is taken as a precursor of titanium oxide, and organic amine is taken as a protective agent; the three liquids are mixed so as to form a transparent solution; the transparent solution is sealed, and is reacted for a certain period of time at a certain temperature under a self-produced high pressure, is cooled to room temperature, and is separated, washed, and recycled. The synthetic method is simple; experimental conditions are not strict; operation is convenient; yield is high; and the prepared titanium oxide nanocrystals are high in crystallization degree, and excellent in photodegradation performance, and is suitable to be used as a photocatalyst.

Method for thermal degradation of cellulose with ion liquid solvent catalysis

The invention provides a method for thermal catalysis degradation of cellulose on an ionic liquid solvent. In the ionic liquid of cellulose (8 Wt percent to 25 Wt percent), imidazolidinyl chloride ionic liquid is taken as the solvent, a solid acid less than one percent of the total weight of the material as a catalyst and the ionic liquid as a cocaralyst are adopted in the reaction of the thermal degradation of the cellulose by homogeneous catalysis under a certain pressure (0.01 MPa to 4.00MPa) and a certain temperature (100 DEG C to 300 DEG C) for 20min to 60min, later reaction solution can be directly distilled and a degraded product of the cellulose distilled at the temperature of 150 to 170 DEG C is collected. The solvent and the catalyst are both recyclable. The method realizes the homogeneous reaction of the cellulose in the ionic liquid and the solid acid catalyst improves the reaction yield. The degraded product of the cellulose can be applied to the fields of household chemistry ...

TEXT-BASED SPEECH SYNTHESIS METHOD, COMPUTER DEVICE, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

A text-based speech synthesis method, a computer device, and a non-transitory computer-readable storage medium are provided. The text-based speech synthesis method includes: a target text to be recognized is obtained; each character in the target text is discretely characterized to generate a feature vector corresponding to each character; the feature vector is input into a pre-trained spectrum conversion model, to obtain a Mel-spectrum corresponding to each character in the target text output by the spectrum conversion model; and the Mel-spectrum is converted to speech to obtain speech corresponding to the target text.

POWER UNIT AND CONTROLLING METHOD THEREFOR

A power unit includes two or more power modules (), each comprising an engine (), a transfer case () connected to the engine () and a hydraulic pump set () connected to the transfer case (). A controlling method for the power unit is also disclosed. Compared to the prior art of using a single super high power engine, the hydraulic mobile crane using the in power unit has advantages of low cost, high reliability, and not being subjected to the restrictions by road transportation conditions during transportation. 1. A power unit , comprising two or more power modules , each of which comprises:an engine;a transfer case connected to the engine;a hydraulic pump set connected to the transfer case.2. The power unit according to claim 1 , further comprising a pin and a quick coupler claim 1 , for connecting the power unit to the main body of a crane.3. The power unit according to claim 1 , further comprising a control module configured to:receive an instruction for selecting one or more of the engines, receive a signal for starting or stopping the selected engine, and receive a signal for controlling the throttle of the selected engine;send an engine start or stop signal to the selected engine, and send a throttle control signal to the selected engine.4. The power unit according to claim 3 , wherein claim 3 , the control module is further configured to:generate a signal for regulating the throttle of the selected engine according to the speed data of the selected engine and the throttle control signal of the selected engine, and then send the generated signal to the selected engine.5. The power unit according to or claim 3 , wherein claim 3 , the control module comprises a programmable logic controller (PLC).6. The power unit according to or claim 3 , further comprising a pin and a quick coupler claim 3 , for connecting the power unit to the main body of a crane.74. A controlling method for the power unit according to any one of - claims 1 , comprising:receiving an ...

Carbon nanotube modified polyacrylonitrile-based carbon fibre precursor and preparation method thereof

The invention relates to a carbon nanotube modified polyacrylonitrile-based carbon fibre precursor and a preparation method thereof. The carbon nanotube modified polyacrylonitrile-based carbon fibre precursor comprises the following components by mass percent: 1-20 percent of carbon nanotubes and 80-99 percent of polyacrylonitrile. The preparation method of the carbon nanotube modified polyacrylonitrile-based carbon fibre precursor comprises the following steps: (1) dissolving the polyacrylonitrile into solvent to prepare a polyacrylonitrile solution in the mass percent of 3 to 45 percent, filtering and deaerating; (2) preparing the solvent of the polyacrylonitrile and water into a spinning coagulation bath; (3) adding untreated or modified carbon nanotubes to the spinning coagulation bath and dispersing the untreated or modified carbon nanotubes to prepare suspension; and (4) squeezing the suspension sprayed by spinneret holes into the spinning coagulation bath to which the carbon nanotubes ...

Overyearing conservation and asexual propagation method for hydranth of jellyfish

The invention provides a hibernating conservation asexual reproduction method for jellyfish hydranth. The method is characterized in that when normal cultivation of young jellyfish is finished in early summer every year, an enough quantity of jellyfish intestinal-shape young fingerlings are purchased and subjected to conservation, illumination, feeding, trace-amount inflation, water changing, asexual reproduction and development under the condition of low temperature. The method improves the efficiency and benefit of cultivating jellyfish fingerlings by reducing or avoiding a sexual reproduction process of fingerling cultivation, has a simple structure, reduces production cost, and is suitable for extensive popularization.

Method and device for evaluating emergency capability of power grid

The embodiment of the invention provides a method and device for evaluating the emergency capability of a power grid, and the method and device are used for achieving the evaluation of the emergency capability of the power grid. The index scores comprise the score of each index in the risk management and control capability index set, the score of each index in the emergency management capability index set and the score of each index in the catastrophe recovery capability index set; according to a subjective preset analysis method and an objective preset analysis method, index weight coefficients are determined, and the index weight coefficients comprise the weight coefficient of each index in the risk management and control capability index set, the weight coefficient of each index in the emergency management capability index set and the weight coefficient of each index in the catastrophe recovery capability index set; and determining a power grid emergency capability evaluation result ...

Prediction method and device for Alzheimer's disease, equipment and storage medium

The invention relates to an artificial intelligence technology, and provides an Alzheimer's disease prediction method and device, equipment and a storage medium, and the method comprises the steps: obtaining target voice data of a to-be-evaluated object in a cognitive function evaluation test; and extracting semantic features and non-semantic features of the target voice data by using the trained disease prediction model, and performing classification prediction on the cognitive level of the to-be-evaluated object according to the semantic features and the non-semantic features to obtain a target prediction result. According to the method, whether the to-be-evaluated object suffers from the Alzheimer's disease or not is comprehensively judged according to the semantic features and the non-semantic features extracted from the voice data of the to-be-evaluated object, the defect that in the prior art, disease prediction can only be carried out from a single feature is overcome, and the accuracy ...

Method for recovering molybdic acid from waste catalyst

The invention discloses a method for recovering molybdic acid from a waste catalyst, which comprises the following steps: (1) carrying out deoiling treatment on a molybdenum-containing waste hydrogenation catalyst to obtain a deoiled material A; (2) uniformly mixing the deoiled material A, ammonium bicarbonate and water, transferring the mixed material into a pressure-resistant container, carrying out hydrothermal treatment, and then carrying out solid-liquid separation to obtain a molybdenum-containing solution; and (3) adjusting the pH value of the molybdenum-containing solution by using an acid solution, separating out a precipitate B, and washing the precipitate B to remove impurities, thereby obtaining molybdic acid. The method is simple in recovery process, low in energy consumption, environmentally friendly and beneficial to industrial application and popularization.

Sample preparation method of mixed material containing soft metal

The invention discloses a sample preparation method of a mixed material containing soft metal. The preparation method comprises steps as follows: a reduced mixed material sample is weighed and placed in a first standard sieve for first sieving; blocky oversize products on the first standard sieve are placed on a second standard sieve for second sieving, and the mesh number of the first standard sieve is smaller than that of the second standard sieve; blocky oversize products after second sieving are weighed and put in a sample bag to serve as a first sample; undersize powdery substances obtained after first sieving and second sieving are repeatedly and uniformly mixed and subjected to uniform reduction, distribution and sampling with a quartering method; and the sampled undersize powdery substances are repeatedly ground by a grinder, sufficiently and uniformly mixed and put in the sample bag to serve as a second sample. The method is scientific and reasonable, has simple and efficient operation ...

Automatic filling production system

An automatic filling production system comprises an assembly line, a multi-head automatic filling device, a multi-segment type cooling device, an automatic cover pressing mechanism and a central controller. The multi-head automatic filling device is arranged on the assembly line and comprises a conveying chain, a wax duct and a plurality of filling mechanisms sequentially arranged on the wax duct. The multi-segment type cooling device is used for conveying of filled wax tanks and cooling solidification of wax liquid; the automatic cover pressing mechanism is used for sealing covers of the wax tanks with the wax liquid cooled and solidified; the central controller is used for controlling automatic filling and metering of the wax liquid, cooling control of the wax liquid, conveying control of the wax tanks and automatic cover sealing of the cooled wax tanks. The automatic filling production system is used for filling of liquid wax products and cooling packaging and conveying of the filled ...

Marine emergency lifesaving device

The utility model relates to the technical field of lifesaving devices, in particular to an ocean emergency lifesaving device which comprises a floating box, an upper inflatable airbag, a lower inflatable airbag, an expansion airbag, a traction rope and a floating ball. The upper inflatable airbag is adhered to the top of the floating box; the bottom of the floating box is bonded with the lower inflatable air bag; a central hole is formed in the middle of the floating box; an expansion air bag is bonded in the center hole. Four side surfaces of the floating box are respectively and fixedly connected with one ends of a plurality of traction ropes; and the other ends of the plurality of pulling ropes are respectively and fixedly connected with a floating ball. An upper inflatable air bag, alower inflatable air bag, an expansion air bag and a plurality of floating balls are matched with one another, so that when one air bag breaks down, dangers are avoided, and the safety performance oflifesaving ...

Database-based telephone traffic analysis and prediction system and telephone traffic prediction method using same

The invention discloses a database-based telephone traffic analysis and prediction system and a telephone traffic prediction method using the same, and relates to a telephone traffic analysis and prediction system and a telephone traffic prediction method. The system and the method solve the problem that the conventional telephone traffic analysis and prediction system and the current telephone traffic prediction method have lower prediction precision and data utilization rate. The telephone traffic analysis and prediction system comprises a database unit and an SAS prediction functional unit, wherein the database unit is mainly used for storing telephone traffic data and prediction result data, and the SAS prediction functional unit is mainly used for predicting the telephone traffic by using time sequence analysis technology. The telephone traffic prediction method is implemented based on the telephone traffic analysis and prediction system; and the reading of the telephone traffic data ...

Preparation method of high-activity hydrodemetalization catalyst for residuum

The invention discloses a preparation method of high-activity hydrodemetalization catalyst for residuum. The method comprises the following steps: (1) dipping a formed alumina carrier with polyol and / or monosaccharide aqueous solution, and conducting hydrothermal carbonization treatment in a sealed container after dipping; (2) drying the alumina carrier subjected to hydrothermal carbonization treatment in the step (1), loading active components Mo and Ni, and then drying again; and (3) roasting the alumina loaded with active components obtained in the step (2) in nitrogen atmosphere, and then roasting in the air atmosphere to finally prepare the hydrodemetalization catalyst for residuum. The active components of the catalyst prepared by the method distributes uniformly on the carrier, have weak interaction with the carrier, and are easy for full sulfuration, so as to significantly improve the metal removal and desulfurization activity of the catalyst.

TEXT-BASED SPEECH SYNTHESIS METHOD AND DEVICE, COMPUTER DEVICE, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

Split type vernier of oil pumping tail walking beam

The utility model provides a split type vernier of oil pumping tail walking beam. Main part in order to overcome the existence of present oil pumping tail walking beam vernier is overall structure, and the counter weight can not be adjusted according to load to the dismouting of not being convenient for, can't satisfy the not enough of beam -pumping unit load fluctuation needs, the utility model discloses a tail walking beam body is " worker " style of calligraphy structural steel, and the up end of " worker " word has vertical track, and terminal surface vertical fixing installs 2 racks that are parallel to each other under " worker " word, the main part of balanced vernier assembly is frame construction, and " worker " style of calligraphy tail walking beam body is located the main body frame of balanced vernier assembly, the main part of balanced vernier assembly includes the upper part of the body and the lower part of the body, upper part of the body " U " shape for invering, and the ...

TTS audio anomaly detection method and device, computer equipment and storage medium

The invention discloses a TTS audio anomaly detection method and device, computer equipment and a storage medium. The method comprises the steps of obtaining a to-be-detected TTS audio file and synthesizing an original text file of the TTS audio file, and converting the original text file into a corresponding phoneme file; predicting the audio duration of the phoneme file by adopting a phoneme length prediction algorithm; calculating a difference value between the audio duration of the phoneme file and the actual duration of the TTS audio file, judging whether the difference value exceeds a preset length threshold, and if the difference value exceeds the preset length threshold, judging that the to-be-detected TTS audio file is an abnormal audio file; and if the length does not exceed the length threshold value, performing speech speed and volume detection on the TTS audio file by using a speech recognition algorithm. According to the method, abnormal audios with missing characters, multiple ...

Preparation method of fluidized bed residual oil hydrogenation catalyst

The invention discloses a fluidized bed residual oil hydrogenation catalyst preparation method, which comprises: (1) carrying out a roasting treatment on a partially inactivated or completely inactivated fluidized bed residual oil hydrogenation catalyst to obtain a roasting treatment material; (2) performing demetallization treatment on the roasted material in the step (1), performing solid-liquid separation on the treated material, and drying the solid material to obtain a demetallized material and filtrate; (3) impregnating the demetalized material in the step (2) with a silicon-containing solution, drying and roasting the impregnated material to obtain a reinforced material, (4) standing the filtrate obtained in the step (2) at a low temperature, filtering, and concentrating the filtrate after filtering to obtain a solution; and (5) impregnating the reinforced material with the solution obtained in the step (4), drying, and roasting to obtain the catalyst. According to the method disclosed ...

Method and system used for intelligent traffic accident management

Lithium ion battery residual life predicting method based on LS-SVM probability ensemble learning

The invention relates to a battery residual life predicting method, in particular to a lithium ion battery residual life predicting method based on LS-SVM probability ensemble learning to solve the problems that a traditional prediction model is limited in prediction precision and not good in stability. An LS-SVM prediction model is established, an input vector is constructed, the appropriate input vector dimension and the appropriate hyper-parameter range are selected, a plurality of sets of parameters are selected at random within a certain range to form a plurality of sub-models of the LS-SVM ensemble learning model, the sub-model result is integrally output, the difficulty of accurately determining the parameters is greatly lowered, and the prediction precision and the stability degree are greatly improved. The lithium ion battery residual life predicting method is suitable for predicting the battery residual life.

Telephone traffic subdistrict self-adaptive classification method applying K-MEANS and prior knowledge

The invention discloses a telephone traffic subdistrict self-adaptive classification method applying K-MEANS and prior knowledge, belonging to the field of mobile communication and aiming at solving the problem that when the telephone traffic subdistricts are divided according to the historical experience of an expert to forecast telephone traffic, the telephone traffic subdistricts are divided with a lot of subjectivity of the expert and the division is not accurately. The self-adaptive classification method includes the steps of: firstly, dividing the telephone traffic subdistricts into a traffic trunk, a busy commercial district, institutions for higher learning and a residential area according to the prior knowledge; secondly, preprocessing and acquiring the clustering feature of each telephone traffic subdistrict, wherein the clustering feature comprises the correlation coefficient, the variance, the maximum value, the median, the average value, the minimum value, the value with the ...

Safety lock mechanism for explosion-proof illumination equipment

The invention discloses a safety lock mechanism for explosion-proof illumination equipment. The safety lock mechanism for explosion-proof illumination equipment comprises an upper case, a lower case, a clamping portion for connecting the upper case and the lower case, a sliding switch for controlling electric connection and disconnection of electric plug devices, a locking portion for locking the clamping portion and a driving portion for controlling the sliding switch and the locking portion to move synchronously, wherein when a link mechanism drives the sliding switch to be in an on state, the locking portion stretches into an upper clamping groove, and when the link mechanism drives the sliding switch to be in an off state, the locking portion retreats from the upper clamping groove. The safety lock mechanism for explosion-proof illumination equipment has the advantages of reasonable structure, convenience in operation, high safety and high explosion-proof performance.

ZSM-5 molecular sieve and synthesis method thereof

The present invention discloses a ZSM-5 molecular sieve and a synthesis method thereof, the ZSM-5 molecular sieve crystal is composed of a plurality of cuboid small crystal grains, the cuboid small crystal grains have a length of 150-300 nm, a width of 50-80 nm and a thickness of 10-50 nm, and the adjacent cuboid crystal grains have obvious slit type pore channels. The synthesis method of the ZSM-5 molecular sieve comprises the following steps: uniformly mixing an inorganic base, a silicon source, an aluminum source, a template agent and water, and then carrying out first-stage crystallization reaction; then, lignosulfonate and sulfate are introduced into a reaction system for a second-stage crystallization reaction, and after the second-stage crystallization reaction is completed, separation, drying and roasting are further performed to obtain the ZSM-5 molecular sieve. According to the invention, the micron-sized large-particle ZSM-5 molecular sieve composed of nano-sized crystals is ...

FPGA implementation device for solving least square problem based on Cholesky decomposition

The invention relates to a FPGA (Field Programmable Gate Array) implementation device for solving least square problem based on Cholesky decomposition, which is suitable for solving the least square problem and settles the problem that computation efficiency of PC (Personal Computer) cannot satisfy real-time and embedded applications; the device comprises a to-be-solved matrix input interface module, a decomposing module and a solving module, wherein an output end of the to-be-solved matrix input interface module is connected to an input end of the decomposing module, and the output end of the decomposing module is connected to the input end of the solving module in order to satisfy real-time, low-consumption and embedded applications.

Be applied to polarization control device of distributed optical fiber vibration sensing system

The utility model provides a be applied to polarization control device of distributed optical fiber vibration sensing system, conspicuous the span once, morally on the basis of optic fiber interference appearance structure, signal processing module has been introduced, polarization controller and phase modulator, in application, apply sinusoidal wavely as reference signal for phase modulator, signal processing module acquires the photoelectric detector received signal, and carry out analysis processes to the signal, utilize the simulated annealing algorithm to obtain the polarization controller's that two way signal differences hour correspond modulation voltage value, adopt this magnitude of voltage to control polarization controller, compensation polarization of light attitude changes. Use the pilot light polarization state of this device sensing bizhong in can adjustment system, keep two sensing bizhong pilot light polarization states unanimous as far as possible, improve the anti polarization ...

Method for reducing calcium aluminate inclusions

The embodiment of the invention provides a method for reducing calcium aluminate inclusions. The method comprises the steps that molten steel is cast into a steel ladle through a converter; the steel ladle is used for casting a tundish, steel remaining operation is carried out in the process that the tundish is cast through the steel ladle, and the steel remaining operation is that part of molten steel is left in the steel ladle in the casting process. The steel remaining operation is carried out in the process that the tundish is cast through the steel ladle, part of calcium aluminate inclusions can be prevented from entering the tundish, the proportion of the calcium aluminate inclusions in a casting blank and a plate coil is obviously improved, and therefore the percent of pass of stamped products is increased.

Dual-end positioning method for partial discharge source of power cable

The invention discloses a dual-end positioning method for a partial discharge source of a power cable. When the power cable is longer, a measurement unit is arranged at the near end of the power cable, and a triggering reflection unit is arranged at the far end of the power cable; a partial discharge signal sent by the partial discharge source firstly reaches the measurement unit at the near end, and when the triggering reflection unit receives a partial discharge pulse through a high-frequency cable transformer, the pulse signal is sent to a signal emission module for amplification, then is sent to the cable through another high-frequency cable transformer and is transmitted to the measurement end; by measurement of the difference of the arrival of time of the partial discharge pulse and the amplified partial discharge pulse, the partial discharge source is positioned; by enhancement of the reflected partial discharge pulse, the positioning precision is greatly improved, and the dual-end ...

Production method of alumina carrier

The invention discloses a production method of an alumina carrier. The method comprises the following processes: (1) conducting excess volume impregnation of pseudo-boehmite by aqueous solution of ammonium salt; (2) filtering and drying the pseudo-boehmite impregnated with aqueous solution of ammonium salt in the step (1); and (3) using the pseudo-boehmite obtained in the step (2) as a raw material and forming, drying and roasting the raw material to obtain the alumina carrier. The alumina carrier produced by the method has the advantages of concentrated pore distribution, high specific surface area and high mechanical strength.

Thin-wall stainless steel welding protectant and preparation method

The invention discloses a thin-wall stainless steel welding protectant and a preparation method, which are used for solving the problem of thin-wall stainless steel welding. The technical scheme of the invention is that: the welding protectant is prepared from the following materials by weight: 500g of water glass, 100 to 117g of titanium dioxide, 60 to 72g of fluorite powder, and 50 to 70g of feldspar powder. The welding protectant in the invention is coated on the back side of a thin-wall stainless steel welding line before welding, the welding is performed on the front side, therefore the welding line is flat and is formed completely on the two sides of the welding line after the welding, and welding defects, such as welding beading, welding slag and the like, are not produced. By using the welding protectant in the invention, a complicated procedure of using an argon chamber on the back side of a welded piece can be abandoned, so that labor resources, financial resources and material ...

Synthetic method for EU-1/MOR symbiotic molecular sieve

The invention discloses a synthetic method for an EU-1/MOR symbiotic molecular sieve. The method comprises the following steps: subjecting an EU-1 molecular sieve to proper alkali treatment so as to prepare a structure-directing agent; then mixing inorganic alkali, a silicon source, an aluminum source and water to prepare initial silica alumina gel; then adding the structure-directing agent; and then carrying out hydrothermal crystallization so as to obtain the EU-1/MOR symbiotic molecular sieve. The method uses conventional inorganic materials as synthesis raw materials, does not contain toxic and harmful substances and has the advantages of green preparation process, simple and easily practicable operation and low synthesis cost. The synthesized EU-1/MOR symbiotic molecular sieve has high crystallinity and basically does not contain other impurities.

Voiceprint recognition model training method and device, electronic equipment and storage medium

The invention provides a voiceprint recognition model training method and device, electronic equipment and a storage medium. The voiceprint recognition model training method comprises the steps of obtaining a training sample; inputting the training sample into a voiceprint recognition model to be trained; calculating a covariance matrix of the label category; determining a first loss function according to the characteristics of the speaker and a covariance matrix of a tag category corresponding to the characteristics of the speaker; training the voiceprint recognition model by adopting a first loss function to obtain a trained voiceprint recognition model; through the above mode, semantic data enhancement of the speaker features is realized by using the covariance matrix corresponding to the tag category, the speaker features and the covariance matrix corresponding to the tag category are fused into calculation of the first loss function, and data enhancement of feature space is realized ...

Trickle irrigation drainage canal

The utility model discloses a trickle irrigation drainage canal, which comprises a plurality of field ditches distributed parallelly. A water pipe perpendicular to the field ditches is disposed at one ends of the field ditches and is provided with water outlets corresponding to the field ditches, and each water outlet is provided with a water flow control part. A waterproof layer is arranged between the bottom of the water pipe and the ground and is in a groove shape disposed along the water pipe, so that leaked water is prevented from overflowing to the ground surface. The trickle irrigation drainage canal can be opened and closed conveniently by the aid of press caps and water outlet branch pipes which are threadedly matched, the water outlet branch pipes can be closed at the initial stage of water injection, the press caps are then opened after pressure in the water pipe is balanced, so that water flow in all the water outlet branch pipes can be balanced to the greatest extent, and uniformity ...

Multifunctional food processor

The invention relates to a multifunctional food processor which comprises a shell, a controller arranged in the shell, a first heating device arranged at the top of the shell and a second heating device arranged at the bottom of the shell and further comprises a first opening formed in the top of the shell and a second opening formed in the front portion of the shell. The movable door plate alternately covers the first opening and the second opening, the first heating devices are arranged on the two sides of the lower portion of the first opening, and the second heating device is arranged to be lower than the bottommost end of the second opening. By arranging the two openings and the corresponding heating devices, the food processor has the functions of a toaster and an oven, when bread slices are baked, the second opening is covered with the movable door plate, the bread slices are put into the food processor from the first opening, and the function of baking the bread slices is achieved ...

CCS-based frequency modulation coordination control method, system, device and medium

The invention discloses a CCS-based frequency modulation coordination control method, which comprises the steps of monitoring a power grid, obtaining a power grid dispatching instruction, and analyzing the power grid dispatching instruction to obtain an AGC load instruction and a primary frequency modulation load instruction generated by a CCS; judging the AGC load instruction and the primary frequency modulation load instruction, and determining whether the adjustment directions of the AGC load instruction and the primary frequency modulation load instruction are consistent or not; under the condition that the judgment result is that the adjustment directions are inconsistent, according to the AGC load instruction, the AGC load actual adjustment amount is determined, and according to the AGC load actual adjustment amount, the load adjustment amount corresponding to the primary frequency modulation load instruction is subjected to superposition correction; taking the load adjusting quantity ...

Voice intention recognition method and device, electronic equipment and storage medium

The invention relates to the technical field of artificial intelligence, and provides a voice intention recognition method and device, electronic equipment and a storage medium, after a voice intention recognition instruction is received, on the basis of an MLM task of an existing pre-training language model, a translated text of the voice and a translated text corresponding to the translated text are obtained, and a voice intention recognition result is obtained. Word vectors of confusable words (such as life insurance and first) can be pulled close in a word vector space, so that the word vectors contain semantic information and voice information. According to the method, the difference between the translated text containing the translation error and the correct translated text is reduced, so that the intention recognition model obtained by performing fine tuning on the pre-trained language model based on the similar text pair has higher robustness to the voice translation error, and ...

Immediate processing process on jellyfish ship

The invention provides an immediate processing process on a jellyfish ship, which is characterized by carrying out immediate processing, i.e. shredding (1), heat treatment (2) and cooling spin drying (3), on fished jellyfish catches on a fishing ship. The immediate processing process has the advantages of simple process, convenience, rapidness and practicability, and can very conveniently carry out immediate processing on the jellyfish catches on the fishing ship and eliminate a large proportion of the moisture content of the jellyfish catches in time, thereby outstandingly enhancing the operation efficiency and the benefit of jellyfish fishery; and in addition, the invention has higher practicability and convenience and is economic, practical and suitable for being extensively popularized.

Preparation method of alumina carrier

The invention discloses a preparation method of an alumina carrier. The method includes the following steps: weighing a proper amount of a pseudo-boehmite dry powder, mixing with a urea aqueous solution, carrying out hydrothermal treatment with the water temperature at 100-200 DEG C on the mixed materials in a sealed container for 1-10 h, and after hydrothermal treatment forming, drying and roasting the materials to obtain the alumina carrier. The method has simple operation process, and can prepare alumina carrier with concentrated pore distribution and high specific surface area in low temperature hydrothermal treatment conditions.

Thin-wall stainless steel welding protectant and preparation method

The invention discloses a thin-wall stainless steel welding protectant and a preparation method, which are used for solving the problem of thin-wall stainless steel welding. The technical scheme of the invention is that: the welding protectant is prepared from the following materials by weight: 500g of water glass, 100 to 117g of titanium dioxide, 60 to 72g of fluorite powder, and 50 to 70g of feldspar powder. The welding protectant in the invention is coated on the back side of a thin-wall stainless steel welding line before welding, the welding is performed on the front side, therefore the welding line is flat and is formed completely on the two sides of the welding line after the welding, and welding defects, such as welding beading, welding slag and the like, are not produced. By using the welding protectant in the invention, a complicated procedure of using an argon chamber on the back side of a welded piece can be abandoned, so that labor resources, financial resources and material ...

Speech synthesis model training method and device, equipment and storage medium

The invention relates to the technical field of artificial intelligence, and discloses a speech synthesis model training method and device, equipment and a storage medium. The method comprises the steps that a speech synthesis model is constructed, a network structure of the speech synthesis model comprises a first reversible layer and at least one second reversible layer, the first reversible layer comprises a reversible convolution module and an affine coupling module, and the second reversible layer comprises an affine coupling module; obtaining audio data, and performing decomposition processing on the audio data according to the network structure of the speech synthesis model to obtain sub-audio data corresponding to each layer; inputting the sub-audio data into the speech synthesis model in sequence, and outputting predicted values, corresponding to the sub-audio data, of the layers; and calculating a loss function according to the predicted value of each layer, training the speech ...

Hardware architecture of CPCI (Compact Peripheral Component Interconnect) bus switch quantity and analog quantity output modules under VxWorks and time-sequence-configurable driving method

The invention discloses hardware architecture of CPCI (Compact Peripheral Component Interconnect) bus switch quantity and analog quantity output modules under VxWorks and a time-sequence-configurable driving method, relating to hardware architecture of CPCI (Compact Peripheral Component Interconnect) bus switch quantity and analog quantity output modules and an output-time-sequence-configurable driving method and aiming to solve the problem that matching of switch quantity output and analog quantity output on the aspect of time sequence in the conventional equipment driver. The CPCI bus switch quantity output module under a VxWorks operating system comprises a CPCI bus, a PCI9054 interface conversion chip, a configuration chip, an FPGA (Field Programmable Gate Array) programmable logic device and a configuration power supply and output portion. The CPCI bus analog quantity output module comprises a CPCI bus, a PCI9054 interface conversion chip, a configuration chip, an FPGA (Field Programmable ...

Silicon-containing steel and smelting method thereof

The invention relates to silicon-containing steel and a smelting method thereof, and belongs to the technical field of steel smelting. The method comprises the steps that scrap steel and molten iron are subjected to mixed converter smelting, then tapping is conducted, and converter molten steel is obtained; refining the converter molten steel to obtain refined molten steel; continuously casting the refined molten steel to obtain silicon-containing steel; first silicon iron is added in the tapping process, and the adding amount of the first silicon iron is obtained through calculation according to element target components, end point sample analysis components, the element yield and the content of alloy elements; second silicon iron is added in refining, and the adding amount of the second silicon iron is obtained through calculation according to the element target, the arrival sample analysis component, the element yield and the alloy element content; according to the difference of calcium ...

Overyearing conservation and asexual propagation method for hydranth of jellyfish

The invention provides a hibernating conservation asexual reproduction method for jellyfish hydranth. The method is characterized in that when normal cultivation of young jellyfish is finished in early summer every year, an enough quantity of jellyfish intestinal-shape young fingerlings are purchased and subjected to conservation, illumination, feeding, trace-amount inflation, water changing, asexual reproduction and development under the condition of low temperature. The method improves the efficiency and benefit of cultivating jellyfish fingerlings by reducing or avoiding a sexual reproduction process of fingerling cultivation, has a simple structure, reduces production cost, and is suitable for extensive popularization.

Method for thermal degradation of cellulose with ion liquid solvent catalysis

The invention provides a method for thermal catalysis degradation of cellulose on an ionic liquid solvent. In the ionic liquid of cellulose (8 Wt percent to 25 Wt percent), imidazolidinyl chloride ionic liquid is taken as the solvent, a solid acid less than one percent of the total weight of the material as a catalyst and the ionic liquid as a cocaralyst are adopted in the reaction of the thermaldegradation of the cellulose by homogeneous catalysis under a certain pressure (0.01 MPa to 4.00MPa) and a certain temperature (100 DEG C to 300 DEG C) for 20min to 60min, later reaction solution can be directly distilled and a degraded product of the cellulose distilled at the temperature of 150 to 170 DEG C is collected. The solvent and the catalyst are both recyclable. The method realizes the homogeneous reaction of the cellulose in the ionic liquid and the solid acid catalyst improves the reaction yield. The degraded product of the cellulose can be applied to the fields of household chemistry ...

Novel magnetic drive direct ventricular auxiliary device

The invention relates to a novel magnetically-driven direct ventricular assist device. The ventricular assist device comprises a pump body and a control part. Wherein the pump body comprises a liquid layer, a permanent magnet layer and a protective layer. The permanent magnet layer is located on the outer side of the liquid layer, the liquid layer is only connected with the top of the protective layer, and the other parts are not connected. And the control part comprises a solenoid device and a current control device. The solenoids are divided into upper and lower rows and located on the upper and lower sides of the pump body. The current control device provides current for the solenoid, and the solenoid generates a magnetic field to enable the permanent magnet rotor of the pump body to start to move and extrude inwards so as to assist heart ejection.

Cooking utensil with self-cleaning function

The invention discloses a cooking utensil with a self-cleaning function. The cooking utensil comprises a machine head assembly, a machine body assembly, a hot air assembly, a water tank and a motor, wherein the hot air assembly and the water tank are arranged on the machine head assembly; the hot air assembly comprises a heating element and fan blades, the machine head assembly is buckled on the machine body assembly to form a cooking cavity, the heating element and the fan blades are located on the upper portion of the cooking cavity, and cooking utensils are placed in the cooking cavity; a rotary cleaning assembly driven by the fan blades is further arranged, the cleaning function is started, the motor drives the fan blades to move, liquid in the rotary cleaning assembly does centrifugal motion along with the fan blades and is rotationally sprayed out from the liquid outlet, and the inner wall of the cooking cavity and components in the cooking cavity are cleaned; compared with the mode ...

Sensor network security testing method and system

The invention provides a sensor network security testing method and system. The method includes the steps that a normative testing device conducts stimulation on a tested device and a simulation attacking node sends a message to attack a network; the response of the tested device serves as the condition for judging whether an expected safety function exists or not and for judging whether the achievement method is correct or not; a security testing server generates a test case set of a security test and leads in test case information, and a test client-side serves as a man-machine interaction port to provide a security testing inlet for the system and confirms the reference standard specification of the test case set and the consistency testing of the system. The sensor network security testing method comprises the security function testing and the security consistency testing, the reliable testing method is provided for security of a sensor network and used for testing the security functions ...

Use of grape inner ester

The invention discloses novel application of auraptene, which is characterized in that the auraptene extracted from a traditional Chinese medicine Citrus aurantium (bitter orange) is taken as an active ingredient and is mixed with a pharmaceutical carrier and an additive to be prepared into an injection, a tablet, a granule, a pill, a capsule, syrup, an ointment, a soft capsule, an emulsion, a microemulsion preparation and other preparations. A preparation method comprises the following steps: Citrus aurantium and bitter orange are extracted by alcohol, extracted by ethyl acetate, separated by a macroporous resin column and a silica gel column, eluted, condensed and repeatedly recrystallized to obtain the auraptene, and then an excipient is added into the mixture to be prepared into the tablet, the capsule, the emulsion and so on. A prepared medicine in the invention is taken as a novel medicine for resisting senile dementia and promoting gastrointestinal movement, which can produce good ...

Fishing bait and its preparing method

Preparation method of EU-1/MOR (mordenite) co-crystallized molecular sieve

The invention discloses a preparation method of an EU-1/MOR (mordenite) co-crystallized molecular sieve. The method is as follows: according to the mol ratio of 9-13Na2O:40-65SiO2:A12O3:2200-4000H2O, mixing an inorganic alkali, a silicon source, an aluminum source and water to make an initial silicon aluminum gel, then adding EU-1 molecular sieve, wherein the mass ratio of the added EU-1 molecular sieve and the added silicon source by SiO2 is 0.05-0.20, after even mixing, crystallizing at 180-240 DEG C for 15-70h, then separating, washing and drying to obtain the EU-1/MOR (mordenite) co-crystallized molecular sieve. According to the method, the EU-1/MOR (mordenite) co-crystallized molecular sieve can be synthesized without use of an organic template agent, and raw materials for the synthesis are conventional inorganic materials, and do not contain toxic and harmful substances, so that the whole preparation process is green and environmental-friendly, and the operation process is simple ...

Baffling high-efficiency bio-filter pool and manufacturing method thereof

The invention provides a highly-efficient deflection biofilter, which is designed as a cuboid. The inside of the biofilter is provided with a plurality of horizontal overflowing partitions; one end of the partition is connected with the biofilter wall, while the other end is preserved with intervals to the opposite biofilter wall; and the bottom of the partition is connected with the undersurface of the biofilter, adjacent two stages of partitions are in staggered left-right arrangement, the first-stage overflowing interval is opposite to a water inlet, and the final-stage interval is opposite to a water outlet, and the horizontal partitions are of a Z shape between the right and the left; each stage of horizontal partition is provided with a plurality of vertical overflowing partitions in the separated space, and two ends of the vertical overflowing partition are connected with the horizontal partition or the biofilter wall; the bottoms or the upper ends of two adjacent vertical partitions ...

Electric circular saw and one-way sliding device thereof

The invention discloses an electric circular saw and a one-way sliding device thereof. The electric circular saw comprises a main body which comprises a shell, a motor, a driving mechanism, a saw blade and a control unit; the driving mechanism is capable of driving the saw blade to pivotally rotate under the driving of the motor, and the control unit controls the motor to run; the one-way sliding device comprises a sliding bottom plate and a rail plate which are slidably connected, the sliding bottom plate comprises a bottom plate frame, a braking gear and a braking component capable of enabling the braking gear to rotate unidirectionally, a rail rack capable of being meshed with the braking gear is arranged on the rail plate, and the main body is mounted on the sliding bottom plate or the rail plate to form sliding connection with the other one of siding bottom plate or the rail plate. The electric circular saw and the one-way sliding device thereof have the advantages that a sliding mechanism ...

Roof photovoltaic power plant

The utility model discloses a roof photovoltaic power plant, including the photovoltaic board, the photovoltaic board includes first photovoltaic board and two second photovoltaic boards and two thirdphotovoltaic boards, second photovoltaic board sets up in the first photovoltaic board left and right sides, third photovoltaic board sets up both sides around first photovoltaic board, second photovoltaic board and first photovoltaic board fixed connection, the utility model discloses a first photovoltaic plate -type form sets up to the rectangle, second photovoltaic board and third photovoltaicplate -type form set up to trapezoidal, be favorable to increasing the area of photovoltaic board, the high -efficient sunlight of receiving, for top layer floor sunshade cooling, through being equipped with solar energy tracking control ware and hydraulic stem, be favorable to adjusting third photovoltaic board angle, the sunlight is received to the at utmost, through being equipped with the airexhauster ...

Acceleration calculation on-chip system of LS-SVM model established based on Zynq platform

An acceleration calculation on-chip system of an LS-SVM model established based on a Zynq platform relates to an acceleration calculation on-chip system of an LS-SVM model. The invention solves the problem that an acceleration calculation on-chip system of the LS-SVM model established based on the Zynq platform is unavailable in the prior art. The acceleration calculation on-chip system comprises a DDR external storage system, a processing system module, a programmable logic module and an AXI bus module; the processing system module realizes task scheduling, calculation of a core function and model prediction, the programmable logic module realizes data pretreatment and solving operation of a linear equation; finally, the acceleration calculation of the LS-SVM model is realized based on a high level comprehensive HLS development manner. The invention is suitable for the acceleration calculation of the LS-SVM model established based on a heterogeneous SoC (system on a chip) platform.

High-low temperature dynamic circulating fatigue test equipment of air spring and test method thereof

The invention provides high-low temperature dynamic circulating fatigue test equipment of an air spring and a test method thereof; the equipment is mainly composed of a high-low temperature test box and a hydraulic pressure device; 1. a refrigerating compressor set, a heater and a blast ventilator are respectively arranged in the engine body of the high-low temperature test box; a digital readout temperature control unit and a timer are arranged on a front left panel respectively, a refrigeration button, an illumination button, a timing button and the like are arranged. 2. A hydraulic pressure system is arranged in the hydraulic pressure device for driving a reciprocating type oil cylinder to transmit force to a connecting rod and a pressure plate, so as to lead the air spring connected on the pressure plate to move in a reciprocating way. The test method is that: the temperature parameters of the air spring for high-temperature or low-temperature test are set by the functional keys on ...

Quality control sample for needle penetration and preparation method

The invention discloses a needle penetration quality control sample and a preparation method thereof. According to the quality control sample, a paraffin sample is used as a base material, a white oil sample is used as an additive A, and vacuum distillate oil is used as an additive B; and fully mixing the base material with the additive A and/or the additive B in a heating melting state, and cooling to obtain the quality control sample. According to the method, the quality control sample with the penetration detection range (0-25 mm) of the penetration is prepared, the penetration detection quality control requirement of wax products is met, and the problems of uniformity and stability of the quality control sample of the penetration are solved.

Intention recognition method and device, equipment and storage medium

The invention relates to artificial intelligence, and provides an intention recognition method and device, equipment and a storage medium. According to the method, a plurality of translated texts are spliced to obtain text segments, the text segments are coded to obtain text coding vectors, the text coding vectors are subjected to feature fusion transformation to obtain target texts, intention recognition is performed on the target texts, and the accuracy of intention information is improved. In addition, the invention also relates to a block chain technology, and the intention information can be stored in a block chain.

Multi-language model training method and device, computer equipment and storage medium

The embodiment of the invention belongs to the field of artificial intelligence, and relates to a multi-language model training method, which comprises the following steps: acquiring a preset single-language pre-training model; constructing a first initial multi-language model based on the single-language pre-training model; based on a first parameter of a first encoder in the single-language pre-training model, adjusting the first initial multi-language model to obtain a second initial multi-language model; acquiring pre-collected training data; and finally, training the second initial multilingual model by using the training data to obtain a target multilingual model. The invention further provides a multi-language model training device, computer equipment and a storage medium. In addition, the invention also relates to a block chain technology, and the target multi-language model can be stored in a block chain. Based on the use of the single-language pre-training model, the training ...

Method for preparing chitosan by degrading chitin with ionic liquid

The invention relates to a method for preparing chitosan by degrading chitin with an ionic liquid. The method comprises the following steps: adding reactants, namely the chitin and the ionic liquid, to a reaction container, wherein the temperature for dissolving the chitin with the ionic liquid is within the range of 70-110 DEG C, the rotating speed of a stirring paddle ranges from 80rad/min to 180rad/min, and the reaction time ranges from 8 to 20 hours; after the chitin is dissolved, adding water to the reaction container for reacting at a temperature within the range of 70-110 DEG C by the rotating speed of the stirring paddle within the range of 80rad/min to 180rad/min for 8-20 hours, wherein the mass ratio of the chitin to the ionic liquid and the water is (1-10):100, and the mass ratio of the water to the ionic liquid is (0.5-5):7; finally, washing the dissolution product with acetonitrile repeatedly until the dissolution product is neutral, next, performing vacuum filtration and spin ...

Novel jellyfish scyphula first feed

The invention provides a jellyfish scyphula first feed. The first feed is prepared by the following steps of: at the stage of culturing early jellyfish scyphula, obtaining fresh oral arms or scapulet of jellyfish; rubbing off whiskers on the fresh oral arms or scapulet of jellyfish; crumbling and filtering the whiskers with 300-mesh bolting silk; intercepting jellyfish whisker tissue fragments with 500-mesh bolting silk; washing away mucilage; and dispersing the whisker tissue fragments in seawater to form jellyfish whisker tissue fragment feed liquid, wherein 1L of seawater is used for every 10g of oral arms or scapulet in average; the processed fresh jellyfish whisker tissue fragments actively move about in the seawater and have the size which is very suitable for ingestion of the early jellyfish scyphula, so that the feed is an excellent early jellyfish scyphula first feed. The feed has the advantages that: the whisker tissues of the oral arms or scapulet of parent jellyfishes are fully ...

Automatic cleaning to-and-fro fire grate of garbage cremator

The invention relates to an automatic cleaning reciprocating grate used for garbage furnace, comprising a movable furnace grate sheet group and movable beams; the movable furnace grate sheet group comprises plural first furnace grate sheets and plural second furnace grate sheets, grooves are arranged at lower lateral sides of the first furnace grate sheets and the second furnace grate sheets respectively; the movable beams are arranged inside the grooves, the first furnace grate sheets and the second furnace grate sheets are arrayed alternatively along the axial direction of the movable beams; the width of the grooves which are positioned on lower lateral side of the first furnace grate sheets is matched with the width of movable beams and the width of the grooves which are arranged at lower lateral side of the second furnace grate sheets is larger than the width of the movable beams. In the process of reciprocating movement of the movable beams, the movement of the second furnace grate ...

Natural gas pipeline decompression energy recuperation unit

The utility model relates to a natural gas pipeline decompression energy recuperation unit. Natural gas power factory need reduce expenditure to reduce pressure when accepting major network high -pressure natural gas and just to send into gas turbine work, and pressure consumes in vain, leads to the fact the energy extravagant. The utility model discloses include admit air pipeline and user's pipeline, the pipeline that admits air divides three to insert user's pipeline all the way, first branch road and second branch road have all set gradually pressure regulating sled device and quck -opening valve group, an use, and one is reserve, the third branch road has set gradually expansion joint, reducing pipe, air -vent valve, magnetic filter, fast valve, no. Two evacuation pipe assemblies, integration turbine inflation generating set, evacuation pipe assembly and stop valve. The utility model discloses can realize the energy recuperation of natural gas decompression overall process to change ...

Electromagnetic adsorption type racket and preparation method thereof

The invention provides an electromagnetic adsorption type racket. The top of a racket mesh frame of the racket is provided with a groove, an electromagnet is arranged in the groove, a magnet cable conductor is arranged inside the racket mesh frame and a racket rod and is connected with an electromagnet control push-button switch arranged at the upper end of a racket handle, the racket handle is hollow, the inside of the racket handle is provided with a battery case for placing a dry battery, and the bottom end of the racket handle is provided with a cover plate of the battery case. A method has the following steps: molds of various components are manufactured, and casting forming or other processing formings and assemblies are performed. The racket has the advantages that the racket has simple structure, scientific design, flexible control, larger practicability and convenience, increases the interest of sports, is economical and practical, and is suitable to be widely popularized.

Reaming method of alumina carrier

The invention discloses a chambering method of an alumina carrier. The method comprises the following steps: carrying out dipping treatment on a molded alumina carrier by using a proper amount of an ammonium chloride solution, and drying and roasting the dipped material to obtain the expanded alumina carrier. According to the method, the formed alumina carrier is reexpanded, the macropore content of the carrier can be improved again on the basis of the original pore structure of the alumina carrier, the method is simple in process and easy for industrial production, and the prepared alumina carrier can be widely applied to the field of heavy residual oil hydrotreatment.

Hydraulic control system and hydraulic control method

A hydraulic control system and a hydraulic control method are disclosed. The hydraulic control system comprises a first closed pump (P) and a first engine (M) connected with each other, a second closed pump (P) and a second engine (M) connected with each other, and a hydraulic motor (P). The first closed pump (P), the second closed pump (P) and the hydraulic motor (P) are connected in parallel. Compared with the prior art, the present hydraulic control system has advantages of wider engine model selection range, higher reliability and better micro-motion performance. 1. A hydraulic control system , comprising:a first closed pump and a first engine connected with each other;second closed pump and a second engine connected with each other; anda hydraulic motor, whereinthe first closed pump, the second closed pump and the hydraulic motor are connected in parallel.2. The hydraulic control system according to claim 1 , wherein it further comprises a brake connected to the output end of the hydraulic motor.3. The hydraulic control system according to claim 1 , wherein it further comprises a controller connected to the first engine and the second engine; the controller is configured to start the first engine and the second engine claim 1 , and is further configured to stop the first engine or the second engine correspondingly when a failure of the first closed pump or the second closed pump occurs.4. The hydraulic control system according to claim 3 , wherein the controller is further configured to detect the rotational speed of the first engine and that of the second engine and calculate the difference between the two;in the case that the difference is larger than a preset value,if the current operation is a hoisting operation, increase the rotational speed of the engine with a relatively low rotational speed;if the current operation is a lowering operation, reduce the displacement of the pump with a relatively high rotational speed.5. The hydraulic control system ...

Large Scale Distributed Syntactic, Semantic and Lexical Language Models

A composite language model may include a composite word predictor. The composite word predictor may include a first language model and a second language model that are combined according to a directed Markov random field. The composite word predictor can predict a next word based upon a first set of contexts and a second set of contexts. The first language model may include a first word predictor that is dependent upon the first set of contexts. The second language model may include a second word predictor that is dependent upon the second set of contexts. Composite model parameters can be determined by multiple iterations of a convergent N-best list approximate Expectation-Maximization algorithm and a follow-up Expectation-Maximization algorithm applied in sequence, wherein the convergent N-best list approximate Expectation-Maximization algorithm and the follow-up Expectation-Maximization algorithm extracts the first set of contexts and the second set of contexts from a training corpus. 1. A composite language model comprising a composite word predictor , wherein:the composite word predictor is stored in one or more memories, and comprises a first language model and a second language model that are combined according to a directed Markov random field;the composite word predictor predicts, automatically with one or more processors that are communicably coupled to the one or more memories, a next word based upon a first set of contexts and a second set of contexts;the first language model comprises a first word predictor that is dependent upon the first set of contexts;the second language model comprises a second word predictor that is dependent upon the second set of contexts; andcomposite model parameters are determined by multiple iterations of a convergent N-best list approximate Expectation-Maximization algorithm and a follow-up Expectation-Maximization algorithm applied in sequence, wherein the convergent N-best list approximate Expectation-Maximization ...

Electric circular saw

An electric circular saw includes a base, a saw blade, a body and a shield. The shield includes a fixed shield, the fixed shield is provided with a window for a user's line of sight to view the saw blade. The body includes a main handle and an auxiliary handle, the auxiliary handle is disposed on a front side of the main handle, the window has an upper extreme position farther from the base, and a cutting point of the saw blade on a product is defined as a position of saw tip, a straight line passes through the upper extreme position of the window and the position of saw tip is defined as a visible line, and the auxiliary handle is configured to deviate from the visible line.

Finger vein comparison method, computer equipment, and storage medium

A finger vein comparison method, a computer equipment, and a storage medium are provided. The finger vein comparison method includes: two finger vein images to be compared are obtained (S10); image channel fusion is performed on the two finger vein images to be compared to obtain a two-channel target finger vein image to be compared (S20); the target finger vein image to be compared is input into a feature extractor, and a feature vector of the target finger vein image to be compared is extracted by the feature extractor (S30); the feature vector of the target finger vein image to be compared is input into a dichotomy classifier to obtain a dichotomy result (S40); and it is determined according to the dichotomy result whether the two finger vein images to be compared come from the same finger (S50).

SLIM EMBEDDING LAYERS FOR RECURRENT NEURAL LANGUAGE MODELS

Described herein are systems and methods for compressing or otherwise reducing the memory requirements for storing and computing the model parameters in recurrent neural language models. Embodiments include space compression methodologies that share the structured parameters at the input embedding layer, the output embedding layers, or both of a recurrent neural language model to significantly reduce the size of model parameters, but still compactly represent the original input and output embedding layers. Embodiments of the methodology are easy to implement and tune. Experiments on several data sets show that embodiments achieved similar perplexity and BLEU score results while only using a fraction of the parameters. 1. A computer-implemented method for compressing input embedding of a neural network model , the method comprising:dividing a source embedding vector of an embedding matrix into a plurality of parts, each part comprising at least two elements;for each part of the source embedding vector, mapping the part to a sub-vector comprising one or more parameters, wherein at least two parts of the source embedding vector are mapped to a same sub-vector; andtraining the neural language model using the mapped sub-vectors until a stop condition is reached.2. The computer-implemented method of wherein the source embedding vector is an input word embedding vector claim 1 , an output word embedding vector claim 1 , or both.3. The computer-implemented method of wherein the step of mapping the part to a sub-vector further comprises forming a mapping table and the mapping table is fixed during training but the one or more parameters of each sub-vectors are subject to updating during training.4. The computer-implemented method of wherein the step of mapping the part to a sub-vector comprises:initializing a list of sub-vector indicators, the list comprising a same number of entries for a sub-vector indicator as there are parts in the source embedding vector;shuffling the ...

Tools for Selecting and Sequencing Operating Parameter Changes to Control a Hydrocarbon Production System

A process for use in managing a hydrocarbon production system includes: selecting, from among a plurality of changes proposed to operating parameters of the hydrocarbon production system, the proposed change with the greatest estimated positive change in production; assessing whether the selected change violates an operating constraint; based on said assessment, producing a valid change based on at least the selected change or identifying the selected change as an unusable change, iterating the above steps, the iteration excluding the valid change from the plurality of proposed changes; and implementing at least one valid change, the number of implemented valid changes being less than the number of proposed changes.

HOLLOW SPHERICAL ZEOLITE IM-5 AND PREPARATION METHOD THEREFOR

The present invention provides a hollow IM-5 molecular sieve sphere and the preparation process thereof. The process according to the present invention adds a relatively great amount of the surfactant of a cationic quaternary ammonium salt in the IM-5 molecular sieve system, to form a hollow IM-5 molecular sieve sphere via the micelle action by the surfactant, which structure benefits the mass transfer of the reaction process. 1. An IM-5 molecular sieve , characterized in that the IM-5 molecular sieve is in the form of a hollow sphere , the hollow sphere having an outer diameter of about 2-about 15 μm , preferably about 2-about 10 μm , more preferably about 4-about 8 μm.2. The IM-5 molecular sieve according to claim 1 , characterized in that the wall of the hollow sphere consists of IM-5 crystal grains having a particle size of about 10-about 500 nm claim 1 , preferably about 10-about 200 nm.3. The IM-5 molecular sieve according to claim 1 , characterized in that the wall thickness of the hollow sphere is about 10%-about 40% claim 1 , preferably about 15%-about 30% claim 1 , of the outer diameter of the hollow sphere.4. A process of preparing the IM-5 molecular sieve according to claim 1 , characterized in comprising the steps of:(1) mixing an alkali source, a templet agent, an aluminum source, water, a silicon source and a cationic surfactant, and stirring the mixture at a suitable temperature to generate a sol; and(2) elevating the temperature of the mixture of step (1) in a hydrothermal reactor to about 140-about 200 degrees C., after hydrothermal crystallization of about 2-about 15 days, taking out and separating the solid product, drying and calcinating to obtain a hollow IM-5 molecular sieve sphere.5. The process according to claim 4 , characterized in that in step (1) claim 4 , the temperature for stirring is about 20-about 70 degrees C. claim 4 , preferably about 55-about 65 degrees C.; and the duration of stirring is about 1-about 24 hours claim 4 , ...

FIBROUS IM-5 MOLECULAR SIEVE AND PREPARATION PROECESS THEREOF

The present invention provides a fibrous IM-5 molecular sieve and the preparation process thereof. According to the process according to the present invention, by adding an appropriate amount of a quaternary ammonium salt with a long carbon chain to the preparation system so as to occur a synergistic action with the organic templet agent, an IM-5 molecular sieve which would be otherwise a rodlike form is converted into the fibrous form. The IM-5 molecular sieve according to the present invention has an aspect ratio greater than that of the rodlike IM-5 molecular sieve obtained according to the prior art, such that the proportion of the exposed periphery crystal face is higher, which benefit to increasing the selectivity of the catalytic reaction for the corresponding crystal face. 1. An IM-5 molecular sieve , characterized in that the IM-5 molecular sieve is in a fibrous form , having an average diameter of about 5-about 30 nm , preferably about 10-about 25 nm; and an average aspect ratio of about 15-about 100 , preferably about 20-about 50.2. The IM-5 molecular sieve according to claim 1 , characterized in that the average length of the fibrous IM-5 molecular sieve is about 100-about 3000 nm claim 1 , preferably about 200-about 1250 nm.3. A process of preparing the IM-5 molecular sieve according to claim 1 , characterized in comprising the steps of:(1) mixing an alkali source, a templet agent, an aluminum source, water, a silicon source and a cationic surfactant homogeneously, and stirring the mixture to generate a sol; and(2) elevating the temperature of the mixture of step (1) in a hydrothermal reactor to about 140-about 200 degrees C., after a hydrothermal crystallization of about 2-about 15 days, taking out and separating the solid product, drying and calcinating to obtain an IM-5 molecular sieve in the fibrous form.4. The process according to claim 3 , characterized in that in step (1) claim 3 , the temperature for stirring is about 20-about 70 degrees C. ...

Hand-held cutting tool

A hand-held cutting tool includes a cutting member, a motor, a housing, a baseplate, a drive shaft, a transmission device and a shield. The motor has an output shaft rotating around a first axis. The housing is provided with a handle portion. The baseplate having a supporting surface connects to the housing and is rotatable about a second axis. The drive shaft drives the cutting member to rotate around a third axis perpendicular to the first axis. The shield encloses at least in part the cutting member in a circumferential direction of the third axis. The first axis obliquely intersects the supporting surface. The supporting surface is parallel to the third axis. The shield and the handle portion are disposed on a same side of the supporting surface. The second axis is parallel to the third axis.

NEW ENERGY-DRIVEN IN-SITU PLANKTON COLLECTING DEVICE

The present invention provides a new energy-driven in-situ plankton collecting device, comprising a solar photovoltaic cell and wind power generation system, a buoyancy support system, a power supply and control system, a plankton suction and collection system, and an anchoring system. The device has the center of gravity on the lower part and vertically floats in water like a tumbler. The plankton suction and collection system is composed of a suction axial-flow pump and a collecting cod end. The bag-shaped plankton collecting cod end has the mesh aperture of less than 0.8 time the average body length of the target plankton, and can be used on both sides. The devices provided by the present invention can be used simultaneously and arranged in an array for collection and utilization of plankton as well as governance and remediation of water area environment, and thus have a favorable application prospect. 1. A new energy-driven in-situ plankton collecting device , comprising a solar photovoltaic cell and wind power generation system , a buoyancy support system , a power supply and control system , a plankton suction and collection system , and an anchoring system , wherein the solar photovoltaic cell and wind power generation system is arranged above the buoyancy support system and provides power supply for the battery of the power supply and control system by using solar energy and wind power; the buoyancy support system is composed of floating balls and connecting pieces and provides buoyancy support for the whole device , and the buoyancy support system is connected with the anchoring system to keep the device vertically floating in the designated area of the water body with the center of gravity below the water surface and to ensure that the height of the solar photovoltaic cell and wind power generation system above the water surface is more than 1.2 times the maximum wave height of the water area; and the power supply and control system is connected with the ...

ANGLE GRINDER AND SHIELD ASSEMBLY THEREOF

An angle grinder includes a housing, an output shaft at least partially extending out of the housing and being rotatable about a first axis relative to the housing, a sleeve fixedly connected to the housing, a first shield surrounding the output shaft and detachably connected to the sleeve, a second shield surrounding at least a part of the first shield and detachably connected to the first shield, and a connector configured for connecting the second shield to the first shield. The second shield is formed or connected with a mounting element for cooperating with the connector, and the connector and the mounting element are separately formed. 1. An angle grinder , comprising:a housing;an output shaft at least partially extending out of the housing and being rotatable relative to the housing about a first axis;a sleeve fixedly connected to the housing, wherein the output shaft passes through the sleeve;a first shield surrounding the output shaft and detachably connected to the sleeve;a second shield surrounding at least a part of the first shield and detachably connected to the first shield; anda connector configured for connecting the second shield to the first shield;wherein the second shield is formed or connected with a mounting element for cooperating with the connector, and the connector and the mounting element are separately formed.2. The angle grinder according to claim 1 , wherein the mounting element is integrally formed with the second shield and the connector and the mounting element are detachably connected to each other.3. The angle grinder according to claim 1 , wherein the first shield forms a first space opening toward a direction facing away from the first axis when the first shield is mounted onto the sleeve and a whole of the first shield and the second shield forms a second space that opens in a direction perpendicular to the first axis when the second shield is mounted onto the first shield.4. The angle grinder according to claim 1 , wherein the ...

Hollow spherical zeolite im-5 and preparation method therefor

The present invention provides a hollow IM-5 molecular sieve sphere and the preparation process thereof. The process according to the present invention adds a relatively great amount of the surfactant of a cationic quaternary ammonium salt in the IM-5 molecular sieve system, to form a hollow IM-5 molecular sieve sphere via the micelle action by the surfactant, which structure benefits the mass transfer of the reaction process.

Angle grinder and shield assembly thereof

An angle grinder includes a housing, an output shaft at least partially extending out of the housing and being rotatable about a first axis relative to the housing, a sleeve fixedly connected to the housing, a first shield surrounding the output shaft and detachably connected to the sleeve, a second shield surrounding at least a part of the first shield and detachably connected to the first shield, and a connector configured for connecting the second shield to the first shield. The second shield is formed or connected with a mounting element for cooperating with the connector, and the connector and the mounting element are separately formed.

Finger vein comparison method, computer equipment, and storage medium

A finger vein comparison method, a computer equipment, and a storage medium are provided. The finger vein comparison method includes: two finger vein images to be compared are obtained (S10); image channel fusion is performed on the two finger vein images to be compared to obtain a two-channel target finger vein image to be compared (S20); the target finger vein image to be compared is input into a feature extractor, and a feature vector of the target finger vein image to be compared is extracted by the feature extractor (S30); the feature vector of the target finger vein image to be compared is input into a dichotomy classifier to obtain a dichotomy result (S40); and it is determined according to the dichotomy result whether the two finger vein images to be compared come from the same finger (S50).

Personal identification number (pin) code processing method and apparatus

This application provides a personal identification number PIN processing method and apparatus. The method includes: in response to detecting that a terminal device is powered on or a first subscriber identification module SIM card is inserted into a powered-on terminal device, detecting whether a PIN verification function of the first SIM card in the terminal device is enabled; and outputting first prompt information in response to that the PIN verification function of the first SIM card is not enabled and the terminal device does not output the first prompt information, where the first prompt information is used to guide a user to enable the PIN verification function of the first SIM card. The method provided in embodiments of this application may be used to guide the user to enable the PIN verification function of the first SIM card, and efficiency is high.

Cutting tool

A cutting tool includes an electric motor supported by a housing, an accessory mounting portion including an output member connected to a saw blade, a transmission mechanism connecting the electric motor to the output member, a base plate disposed at the bottom of the housing and having a mounting hole for the saw blade to pass through, a battery pack interface configured to be detachably connected to a battery pack, a liquid storage system including a liquid storage device configured to store a liquid and detachably mounted on the housing, and a system control member disposed on a liquid flow path of the liquid storage system and used for controlling the flow state of the liquid in the liquid storage device. The electric motor is a brushless motor, and a rotational speed of the electric motor is not lower than 7000 revolutions per minute.

Electric circular saw

An electric circular saw includes a base, a saw blade, a body and a shield. The shield includes a fixed shield, the fixed shield is provided with a window for a user's line of sight to view the saw blade. The body includes a main handle and an auxiliary handle, the auxiliary handle is disposed on a front side of the main handle, the window has an upper extreme position farther from the base, and a cutting point of the saw blade on a product is defined as a position of saw tip, a straight line passes through the upper extreme position of the window and the position of saw tip is defined as a visible line, and the auxiliary handle is configured to deviate from the visible line.

Method for switching between sim card and esim card, and electronic device

Cutting tool

A cutting tool includes: a drive device for driving a saw blade to rotate; a base plate having an upper surface and a lower surface, wherein the lower surface is configured to abut against a cut material; a body accommodating at least part of the drive device and connected to the upper surface; a handle at least partially configured behind the body; and a junction portion for detachably mounting a battery set. When a cutting depth of the cutting tool is changed and a cutting angle of the cutting tool remains unchanged, a position of the handle relative to the base plate remains unchanged. The cutting tool is comfortable and convenient to use.

Alumina grain, preparation method therefor and use thereof

An alumina grain has a single-crystal structure and has an approximate regular octahedral stereoscopic morphology. Eight sides of the alumina grain belong to the {111} family of crystal planes of γ-state alumina, and the grain size is 5-100 μm. The alumina grain is unique in crystal plane exposure and distribution, simple and feasible in preparation, and low in cost, and has higher operability, and thus has good application prospect in the field of catalysis and adsorption.

Tools for selecting and sequencing operating parameter changes to control a hydrocarbon production system

A process for use in managing a hydrocarbon production system includes: selecting, from among a plurality of changes proposed to operating parameters of the hydrocarbon production system, the proposed change with the greatest estimated positive change in production; assessing whether the selected change violates an operating constraint; based on said assessment, producing a valid change based on at least the selected change or identifying the selected change as an unusable change, iterating the above steps, the iteration excluding the valid change from the plurality of proposed changes; and implementing at least one valid change, the number of implemented valid changes being less than the number of proposed changes.

Method for recovering sim card of electronic device from card drop, and electronic device

Method for recovering sim card of electronic device from card drop, and electronic device

This application discloses a SIM card detection failure recovery method for an electronic device. The method includes: An electronic device first identifies a card recovery scenario. Card recovery herein means whether to power on a SIM card. A configurable timer is started based on the card recovery scenario. The electronic device periodically obtains, based on a time set by the timer, power-on information for powering on the SIM card. The electronic device determines a power-on condition of the SIM card based on the obtained power-on information. If the power-on condition is met, the electronic device powers on the SIM card. When a SIM card detection failure occurs, SIM card detection failure recovery can be more accurately and timely implemented according to the method.

SIM Card Detection Failure Recovery Method for Electronic Device and Electronic Device

A subscriber identification module (SIM) card detection failure recovery method for an electronic device includes that the electronic device identifies a card recovery scenario, where card recovery includes whether to power on a SIM card. A configurable timer is started based on the card recovery scenario. The electronic device periodically obtains, based on a time set by the timer, power-on information for powering on the SIM card. The electronic device determines a power-on condition of the SIM card based on the power-on information. If the power-on condition is met, the electronic device powers on the SIM card.

SIM card detection failure recovery method for electronic device and electronic device

A subscriber identification module (SIM) card detection failure recovery method for an electronic device includes that the electronic device identifies a card recovery scenario, where card recovery includes whether to power on a SIM card. A configurable timer is started based on the card recovery scenario. The electronic device periodically obtains, based on a time set by the timer, power-on information for powering on the SIM card. The electronic device determines a power-on condition of the SIM card based on the power-on information. If the power-on condition is met, the electronic device powers on the SIM card.

Personal identification number (pin) code processing method and apparatus

Personal identification number pin processing method and apparatus

In accordance with an embodiment, a method for verifying a personal identification number (PIN) code includes: receiving a first PIN code entered by the user, and storing the first PIN code to complete enabling the function of automatically verifying the PIN code of a first subscriber identity module (SIM) card, wherein the first PIN code is used by a terminal device to automatically verify the first SIM card; and verifying automatically the PIN code of the first SIM card in response to the first SIM card being inserted into the terminal device while the terminal device is powered-on or in response to the terminal device into which the first SIM card is inserted being powered-on.

Fibrous IM-5 molecular sieve and preparation process thereof

The present invention provides a fibrous IM-5 molecular sieve and the preparation process thereof. According to the process according to the present invention, by adding an appropriate amount of a quaternary ammonium salt with a long carbon chain to the preparation system so as to occur a synergistic action with the organic templet agent, an IM-5 molecular sieve which would be otherwise a rodlike form is converted into the fibrous form. The IM-5 molecular sieve according to the present invention has an aspect ratio greater than that of the rodlike IM-5 molecular sieve obtained according to the prior art, such that the proportion of the exposed periphery crystal face is higher, which benefit to increasing the selectivity of the catalytic reaction for the corresponding crystal face.