床屏（281#）

无人机地面控制终端

高压绝缘电阻测试仪

床屏（286#）

床屏（282#）

婴幼儿监视器（HB56RX）

床屏（283#）

氢氧离子空气净化器底座

Carbon source material for microbial culture and preparation method thereof

The invention discloses a preparation method of a carbon source material for microbial culture, which comprises the following steps: mixing gelatin and oxalic acid, uniformly stirring at normal temperature, then adding concentrated sulfuric acid with the concentration of 70-80wt% into the mixture for reaction, slowly dropwise adding while stirring in the adding process, cooling the product to room temperature after dropwise adding is finished, filtering, washing, and drying to obtain the carbon source material for microbial culture. Washing and drying the product to obtain a carbon source precursor material; soaking the obtained carbon source precursor material in an ethanol solution containing fluorine-containing silane overnight, then washing and sintering, grinding the obtained product into powder, adding trace elements and vitamins, and uniformly mixing; and adding the mixture into a double-screw extruder, heating and melting, extruding, blowing at an extrusion end for 5-15L/L.min, ...

Cylinder cover system, engine and vehicle

The invention discloses a cylinder cover system, an engine and a vehicle. The cylinder cover system comprises a plurality of combustion systems which are arranged side by side in the first direction and correspond to a plurality of air cylinders of an engine one to one, each combustion system comprises a combustion chamber, an air inlet channel, an exhaust channel, a spark plug hole and an oil sprayer hole, and the air inlet channels and the exhaust channels are arranged at intervals in the second direction perpendicular to the first direction; the spark plug hole and the fuel injector hole are formed in the middle area of the combustion chamber at intervals in the second direction, the spark plug hole is formed in the side close to the exhaust channel, and the fuel injector hole is formed in the side close to the air inlet channel. According to the scheme, rapid combustion can be achieved, knocking reduction is facilitated, the compression ratio is improved, the heat efficiency of the ...

Heating and temperature measuring electrode based on hot wire method

The invention relates to a heating and temperature measuring electrode based on a hot wire method, which is characterized in that one ends of two metal electrode rods are respectively connected with platinum-rhodium wires for heating, and are respectively connected with a positive electrode and a negative electrode of a power line, and the platinum-rhodium wires are connected to form a heating loop; the other end of the metal electrode stem is fixed on the electrode stem support member; a ceramic tube is arranged in the cavity of each metal electrode stem, and the positive electrode and the negative electrode of the platinum-rhodium thermocouple are arranged in the ceramic tubes respectively to serve as temperature measurement cold ends; one end of the spiral micrometer is arranged on the spiral micrometer supporting component, the spiral micrometer supporting component is connected with the electrode rod supporting component through the middle connecting rod, the heating assembly is driven ...

Coal seam roof aquifer ground directional hole water level monitoring instrument

The invention discloses a coal seam roof aquifer ground directional hole water level monitoring instrument, and relates to the technical field of water level monitoring, the coal seam roof aquifer ground directional hole water level monitoring instrument comprises a mounting column, the bottom of the mounting column is in a circumferential shape, and three adjusting assemblies are embedded at equal intervals; three supporting rod assemblies and three base assemblies are arranged at the positions, corresponding to the adjusting assemblies, of the exterior of the mounting column, a first convenient-to-disassemble assembly is jointly mounted at the joint of each adjusting assembly and the corresponding supporting rod assembly, and a second convenient-to-disassemble assembly is jointly mounted at the joint of each supporting rod assembly and the corresponding base assembly; a triangular structure is formed by the three supporting rod assemblies and the three base assemblies to support the mounting ...

SOI substrate and preparation method thereof

The invention provides an SOI (Silicon On Insulator) substrate and a preparation method thereof, the substrate comprises a substrate layer, a first buried oxide layer, a back gate adjustment layer, a second buried oxide layer and a top semiconductor layer which are sequentially arranged from bottom to top, and an insulation isolation structure is arranged in the back gate adjustment layer. According to the invention, the first buried oxide layer is arranged as a bonding interface, so that the degree of freedom of adjusting the thickness of the second buried oxide layer is large, and the bonding difficulty and the preparation cost are reduced; meanwhile, the back gate adjusting layer is provided with a through hole and an insulation isolation structure which is partially filled in an insulation manner, so that ion diffusion among different doped regions in the back gate adjusting layer is avoided, and strength support for the interior of the through hole is formed; in addition, the second ...

Stimulator, electronic equipment and computer readable storage medium

The invention provides a stimulator, electronic equipment and a computer readable storage medium, the stimulator comprises a pulse generator, a conversion module and N electrode wires, and the pulse generator is used for generating and outputting M paths of electrical stimulation pulse signals; the conversion module is provided with M stimulation receiving ends and N stimulation output ends, each stimulation receiving end is in communication connection with at least one stimulation output end, and the stimulation output ends connected with any two stimulation receiving ends do not coincide; each stimulation receiving end is used for receiving one path of electrical stimulation pulse signal and outputting the electrical stimulation pulse signal to the stimulation output end connected with the stimulation receiving end; each electrode lead is used for being connected to one stimulation output end, and each electrode lead is used for receiving one path of electrical stimulation pulse signals ...

Acrylic plate with impact resistance

The invention discloses an acrylic plate with impact resistance, and relates to the technical field of acrylic plates, the acrylic plate comprises a box body and a plate body embedded in the box body, the plate body and the box body are fixed through limiting mechanisms arranged on the four side walls of the plate body, and a vibration alarm is arranged on the inner side wall of the plate body. The vibration alarm automatically gives an alarm when the connecting structure of the plate body and the box body has a vibration frequency exceeding a monitoring threshold value of the vibration alarm; and embedding grooves matched with the limiting mechanisms are formed in the inner side walls of the four edges of the box body correspondingly, and mounting cavities communicating with the embedding grooves are formed in the four edges of the box body correspondingly. The anti-impact performance of the plate body is improved conveniently, the risk that the plate body is loosened and falls off due ...

Method for controlling yield of vanadium-aluminum alloy

The invention discloses a method for controlling the yield of a vanadium-aluminum alloy. The method specifically comprises the following steps: (1) using a copper crucible and a graphite furnace body as aluminothermic reaction containers; (2) uniformly mixing flaky vanadium pentoxide, aluminum particles and a slag former, and adding the mixture into an aluminothermic reaction container; (3) putting the reaction container filled with the mixed raw materials into a cooling tank with circulating water, and additionally arranging a furnace cover; (4) igniting a magnesium rod to initiate an aluminothermic reaction; (5) after the thermit reaction is finished for 5-8 minutes, taking down the furnace cover and the furnace body; (6) when the alloy ingot is cooled to 950 DEG C, stopping introducing the cooling water, and additionally arranging a heat preservation furnace cover on the copper crucible; and (7) naturally cooling for 24-48 hours, and finishing the cooled alloy to obtain a vanadium-aluminum ...

Safety protective fence for mine draw shaft mouth

The invention discloses a mine draw shaft mouth safety protective fence which comprises stand columns and further comprises a plurality of transverse rails arranged on the stand columns. The protection plates are arranged on the cross bars, and the number of the protection plates is multiple; the disassembling and assembling mechanism is arranged on the stand column, and the protective fence is disassembled or assembled through the disassembling and assembling mechanism; when the mine draw shaft opening safety protective fence is used, the protective fence is disassembled into parts one by one through the disassembling and assembling mechanism to be conveyed to the draw shaft opening in a mine hole, then the stand columns are placed well, the transverse fence is fixed to the stand columns through the clamping pieces, and then the protective plate is fixed to the transverse fence through the limiting pieces; according to the protective guard, the buffer parts are arranged, so that impact ...

SOI substrate, preparation method of SOI substrate and SOI device

The invention provides an SOI substrate, a preparation method of the SOI substrate and an SOI device, the SOI substrate comprises a substrate, a second buried oxide layer, an intermediate layer, a functional dielectric layer and a top semiconductor layer, the substrate comprises a support substrate and a first buried oxide layer; the second buried oxide layer is located above the substrate, and the second buried oxide layer comprises at least one groove which is opened from the bottom surface of the second buried oxide layer and penetrates through the second buried oxide layer; the middle layer is located between the first buried oxide layer and the second buried oxide layer, and the part, located in the groove, of the middle layer serves as a protruding structure; the functional dielectric layer at least covers the top surface of the convex structure; the top semiconductor layer covers the exposed surfaces of the second buried oxide layer and the functional dielectric layer. According ...

Synthesis method of psoralen

The invention discloses a synthesis method of psoralen, which comprises the following steps: (1) taking resorcinol and malic acid as raw materials, and carrying out Pechmann condensation reaction to synthesize 7-hydroxycoumarin, (2) carrying out etherification reaction to synthesize 7-allyloxy coumarin, (3) carrying out Claisen rearrangement reaction to prepare 6-allyl-7-hydroxycoumarin, and (4) carrying out cyclization reaction to synthesize the psoralen. The synthesis method is simple in process, the used raw materials are cheap and easy to obtain, the product separation and purification are simple, the yield is higher than 70%, the purity of the psoralen reaches 99% or above finally, large-scale production can be carried out, and wide application prospects are achieved.

Detection equipment and detection method of array type chip

The invention discloses detection equipment and a detection method of an array type chip and a detection method of an array PD chip. The detection method of the array PD chip comprises the following steps: S1, detecting the position of the array PD chip; s2, adjusting the angle of the array PD chip; s3, detecting the offset of the array PD chip; s4, adjusting the offset of the array PD chip: driving the array PD chip to translate through a chip position adjusting mechanism according to the position detection information of the array PD chip, and adjusting the position of the array PD chip; and S5, array PD chip detection: a plurality of chips on the array PD chip are detected at the same time through a probe assembly with at least two probes. Through the array PD chip detection method, a plurality of chips can be detected at the same time, and the array PD chip detection efficiency is effectively improved.

Application of TRIM29 in breast cancer immunotherapy

The invention discloses application of TRIM29 in breast cancer immunotherapy, and the inventor finds that TRIM29 is combined with voltage-dependent anion channel protein VDAC1 in a mitochondrial outer membrane to regulate and control the opening of a mitochondrial membrane permeability conversion pore, so that mitochondrial calcium outflow, cytoplasm calcium level increase and activation of the activity of a transcription factor NFAT are caused, and thus the expression level of PD-L1 is up-regulated. The expression of TRIM29 is interfered, and the expression level of PD-L1 can be reduced. In breast cancer cells, the PD-L1 level of tumor cells can be remarkably reduced by knocking down TRIM29, and recognition and killing of T cells on the tumor cells are activated.

Method for preparing high-purity metal vanadium

The invention belongs to the technical field of non-ferrous metal smelting, and particularly relates to a method for preparing high-purity metal vanadium. When the aluminothermic reduction reaction is carried out, simple substance aluminum is used as a reducing agent, vanadium oxide is reduced into vanadium metal simple substance, aluminum participating in the reaction is oxidized into aluminum oxide, a large amount of heat energy is released to melt various metal simple substances to form alloy liquid, aluminum oxide floats on the surface of the obtained alloy liquid, and aluminum oxide and metal alloy are naturally separated after cooling; removing aluminum oxide to obtain a vanadium-aluminum alloy; as a slag former, the calcium compound can reduce the primary crystal temperature of aluminum oxide and provide longer impurity floating time, so that the purity of the obtained vanadium-aluminum alloy is higher; after the high-purity vanadium-aluminum alloy is obtained, the metal vanadium ...

Column type inspection pit structure for core grouting after full assembly and construction method

The column type inspection pit structure comprises a foundation structure and a plurality of inspection pit assemblies, the multiple inspection pit assemblies are sequentially connected and fixed to the foundation structure, and each inspection pit assembly comprises a prefabricated bottom plate, a prefabricated hollow column and a plurality of prefabricated retaining walls; a plurality of column bottom connecting grooves are formed in the prefabricated bottom plate, one ends of the prefabricated hollow columns are inserted into the column bottom connecting grooves in a one-to-one correspondence mode and connected with the prefabricated bottom plate through concrete pouring, and the prefabricated retaining walls are all fixedly installed on the side walls of the prefabricated hollow columns. The prefabricated column type inspection pit has the beneficial effects that construction is conducted in a formwork-free mode that prefabrication is conducted firstly and then pouring is conducted, ...

Thermal management method, device and system for energy power battery

The invention discloses a thermal management method, device and system for an energy power battery, and the method comprises the steps: monitoring the temperature of a first battery cell of the power battery in real time, releasing a first supercritical working medium in an energy accumulator and inputting the first supercritical working medium into a working pipeline when the temperature of the first battery cell exceeds a preset working range, starting a semiconductor chip to process the working medium in the working medium storage tank into a second supercritical working medium; inputting the second supercritical working medium into a working pipeline, inputting the first supercritical working medium and the second supercritical working medium into the working pipeline and then sequentially entering a shunting channel, and outputting a third supercritical working medium into a battery module through the shunting channel; and after the third supercritical working medium enters the battery ...

MODIFIED ROSIN RESIN, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

The present invention provides a modified rosin resin, a preparation method therefor, and an application thereof. The modified rosin resin is prepared by the reaction of rosin, a benzene ring-containing carboxylic acid, an epoxy compound, maleic acid and a derivative thereof, and a hydroxyl group-containing ether compound. The modified rosin resin provided by the present invention introduces a hydrophobic benzene ring into the rosin molecule and reacts the hydroxyl group-containing ether compound with a hydrophilic carboxyl group, to form a hydrophilic group having low hydrophilicity, thereby greatly improving the water resistance of the rosin resin, and does not use an organic solvent as a reaction medium in the preparation process of the modified rosin resin, thereby avoiding environmental pollution and solvent residue in the product, achieving safety of use and environmental protection.

RAPID RECOVERY METHOD AND APPARATUS THEREFOR

Provided are a rapid recovery method and an apparatus therefor. The rapid recovery method comprises: evaluating the data downloading quality of a plurality of wireless access technologies of the current wireless access technologies, so as to obtain a candidate wireless access technology list; judging whether the packet service downloading quality of the current wireless access technologies becomes poor; and if the packet service downloading quality of the current wireless access technologies becomes poor, then selecting one of other access technologies from the candidate wireless access technology list and performing switching. The rapid recovery method and the apparatus therefor provided in the present invention can realize seamless switching of wireless access technologies and keep continuous data transmission.

METHOD AND DEVICE FOR METADATA QUERY

An embodiment of the invention provides a method and a device for metadata query. The method includes sampling at least one first metadata from metadata to be searched; searching corresponding container identifications in a sparse index table preset in a memory with at least partial characteristic values of each sampled first metadata as an index, and wherein the container identifications are recorded in the sparse index table, and a position index of each container identification in the index table is at least partial characteristic values of the metadata stored in the container corresponding to the container identification; selecting a container corresponding to the container identification satisfying set conditions according to the found times of the same container identification; loading the metadata in the selected container into a metadata buffer; and searching data blocks identical to the metadata to be searched from said metadata buffer. The embodiment of the invention has advantages ...

ADAPTIVE EQUIPMENT OVERLOAD EMERGENCY CONTROL METHOD BASED ON AUTOMATIC MEASURE SENSITIVITY IDENTIFICATION

An adaptive equipment overload emergency control method based on automatic measure sensitivity identification. According to the method, for equipment overload emergency control causing no power grid splitting, e.g., single disconnection or same-station parallel equipment total disconnections: when equipment overload is determined for the first time, calculating, according to a measure sensitivity initial value, equipment overload emergency control measure combinations to control the power grid; reckoning, according to the control effect, integrated measure sensitivity, and utilizing the integrated measure sensitivity to update the sensitivity of other measures of a station to which a recently applied measure is accessed; calculating the equipment overload emergency control measure combinations; and iterating "sensitivity reckoning-control measure calculation" until the equipment overload is eliminated. The method can comprehensively guarantee control precision, timeliness and reliability ...

BASE STATION AND DATA TRANSMISSION SWITCHING METHOD THEREOF

A base station and a data transmission switching method thereof are disclosed in the present invention, said method including: channel building, building a first data channel from a base station to a base station controller and a second data channel from the base station to another base station; data buffering, sending and buffering data to be transmitted to the first data channel and the second data channel; data sending, opening the first data channel or the second data channel to users alternatively so that the data to be transmitted in the first data channel or the second data channel is sent to the users; the first data channel and the second data channel equipped with data buffer areas, used for buffering the data to be transmitted; switching unit, also included, used for opening the first data channel or the second data channel to users alternatively so the data to be transmitted in the first data channel or the second data channel is sent to the users. The present invention enables ...

STREAMING MEDIA-BASED SYSTEM AND METHOD FOR SECOND RETRANSMISSION OF LOST PACKET

The present invention relates to the field of streaming media playback. Disclosed are a streaming media-based system and method for second retransmission of a lost packet. The system comprises a control module, as well as a data receiving module, a network packet loss detection module, a retransmission module, and a video playback module that are connected to the control module. The data receiving module is used for receiving data packets, storing the data packets in a linked list, determining whether the data packets are retransmitted data packets, and sorting the data packets. The network packet loss detection module is used for parsing the data packets and detecting packet loss of the data packets. The retransmission module is used for adding lost data packets to a retransmission queue and initiating a retransmission request to a server. The retransmission module is further used for adding data packets that are still lost after the retransmission to a retransmission queue and initiating ...

昆虫性诱测报诱捕器

配网线路驱鸟器

包装盒（年鱼有礼）

床屏（288#）

琴式柜

Detection system and detection method for mining spray dust fall efficiency

The invention provides a detection system and a detection method for mining spray dust fall efficiency, the detection system comprises a fully-closed experiment box, a plurality of inner corners of the fully-closed experiment box are provided with dust spraying nozzles, the plurality of dust spraying nozzles are connected with at least one set of power dust spraying equipment through a dust conveying pipe, and the top wall of the inner side of the fully-closed experiment box is provided with at least one spray nozzle. The spray nozzle is connected with a set of power spray equipment through a liquid conveying pipe, the side wall of the totally-closed experiment box is connected with an annular pressure balance water tank through a glass pipe, the upper portion of the side wall of the totally-closed experiment box is connected with a check valve, the outer side of the totally-closed experiment box is connected with a balance barometer, and the side wall of the totally-closed experiment box ...

Intelligent wind resistance and dust control device and dust control method for tunneling face

The invention discloses an intelligent air blocking and dust controlling device and method for a heading face, and relates to the technical field of coal mine heading face dust control. The intelligent air blocking and dust controlling device comprises a gas concentration sensor, a wet dust removing fan with an air suction opening, an air pressing barrel and a front air blocking device; the pipeline is composed of an arc-shaped fixing piece and an arc-shaped radial wind blocking piece, the arc-shaped wind blocking net is welded in the pipeline, and electromagnet strips which are in magnetic connection with the arc-shaped wind blocking net are arranged on the periphery of the front wind blocking device. Effective diversion of high-speed compressed air flow is achieved through the front choke device, the axial air flow flowing to the head-on front portion is reduced, radial air flow prevents dust from diffusing backwards under the wall attachment effect, and meanwhile the gas concentration ...

Method for improving flaw detection qualification rate of aluminum alloy ring piece finished product

The invention relates to a method for improving the flaw detection qualification rate of an aluminum alloy ring piece finished product, which comprises the following steps: flaw detection is carried out after the surface of a forged ring blank is exposed to light to obtain a first threshold value and a second threshold value of a flaw detection unqualified area; obtaining a first outer diameter, a first inner diameter and a first height dimension; if the first inner diameter is larger than the first threshold value, it is judged that flaw detection of the ring piece finished product is qualified; if the first inner diameter is smaller than or equal to the first threshold value, it is judged that flaw detection of the ring piece finished product is unqualified, and a flaw detection unqualified area is reversely deduced and checked; and the forging process parameters are adjusted again, new forging process parameters are obtained, and the third threshold value of the adjusted flaw detection ...

Product quality determination method and device based on production line

The invention provides a product quality determination method and device based on a production line, and the method comprises the steps: obtaining at least two sub-images of a to-be-tested product, each sub-image is provided with one to-be-tested product, the to-be-tested products in different sub-images are different, and the to-be-tested products in different sub-images are different; each product to be tested is located on one production line; according to the total number of the to-be-tested products in the at least two sub-images, threads with the same number are started, and each thread corresponds to one production line; a multi-thread parallel processing technology is adopted, multiple threads are controlled to analyze different sub-images on a production line at the same time, the quality category of a to-be-tested product in the sub-images is recognized, each thread is used for analyzing one sub-image, the multiple threads call the same recognition model to conduct image analysis ...

Pre-lithiated silicon-oxygen negative electrode material as well as preparation method and application thereof

The invention discloses a pre-lithiated silica negative electrode material as well as a preparation method and application thereof, a naphthyl methyl derivative is adopted as a pre-lithiation reagent, pre-lithiation is performed to obtain a lithium-naphthyl methyl derivative compound, the potential to lithium of the lithium-naphthyl methyl derivative compound is lower than 0.3 V, and then the lithium-naphthyl methyl derivative compound fully reacts with a silica material for solid-liquid separation to obtain the pre-lithiated silica negative electrode material. And finally carbonizing residual organic matters in the solid in an inert atmosphere to obtain the pre-lithiated silicon-oxygen negative electrode material. According to the method, firstly, the naphthyl methyl derivative is used as a pre-lithiation reagent, and after lithiation, when the naphthyl methyl derivative is mixed with the silica material, oxygen atoms and silicon dioxide in the silica material can be deeply reacted, so ...

Geothermal exploration device and exploration method

The geothermal exploration device comprises a geothermal temperature detection device and a rock mass water pressure test device, and solves the problems that existing equipment is high in overall manufacturing cost and large in energy loss.

Unmanned sweeping vehicle capable of achieving gap and deep groove sweeping operation

The invention provides an unmanned sweeping vehicle capable of achieving gap and deep groove sweeping operation. The unmanned sweeping vehicle comprises a vehicle body capable of running on the ground, and a ground sweeping device and a gap sweeping device located behind the ground sweeping device are arranged at the bottom of the vehicle body; a gap detection device for detecting the position of a gap and a depth detection device for detecting the depth of the gap are downwards arranged at the front part of the vehicle body; a position adjusting mechanism used for driving the gap cleaning device to move at the bottom of the vehicle body so that the gap cleaning device can move in the length direction of the gap is installed at the bottom of the vehicle body, and a direction adjusting mechanism used for driving the gap cleaning device to horizontally rotate to adapt to the gap trend is installed at the bottom of the vehicle body. The unmanned sweeper not only can sweep the ground, but also ...

Application of tolbuzumab in preparation of medicine for treating dementia or age-related cognitive function impairment

The invention discloses application of tolbuzumab in preparation of a medicine for treating dementia or age-related cognitive function impairment. The invention finds new application of the tolbuzumab, and after the tolbuzumab is used in a therapeutic manner, the cognitive function and neuropathological process of a dementia model mouse can be obviously improved, that is, the tolbuzumab has the effect of treating dementia, age-related cognitive function impairment and other related diseases; the compound can be used for preparing corresponding medicines for treating dementia and medicines for treating age-related cognitive function impairment.

House foundation settlement repairing device and repairing process

The invention relates to a house foundation settlement repairing device and technology, and belongs to the technical field of foundations. The device comprises a movable vehicle body, a drill rod, a servo motor and a dust cover, a door-shaped frame is arranged on the movable vehicle body, a lifting plate and a lifting assembly are arranged on the door-shaped frame in a sliding mode, and the lifting assembly is connected with the lifting plate and used for driving the lifting plate to move on the door-shaped frame in the length direction of the door-shaped frame; the servo motor is arranged on the lifting plate, an output shaft of the servo motor vertically and downwards penetrates through the lifting plate, the drill rod is coaxially and detachably arranged on the output shaft of the servo motor, the dust cover is arranged on the movable vehicle body and located under the door-shaped frame, and the dust cover is a horn-shaped cover body with the upper end closed. The lower end of the dust ...

SDN (Software Defined Network) routing optimization method based on digital twinning

The invention provides an SDN (Software Defined Network) routing optimization method based on digital twinning, which comprises a physical space and a virtual space, and is characterized in that a data plane formed by a host and a switch of an SDN and a control plane formed by a controller exist in the physical space; the digital twinning constructed by using the host, the switch and the link information in the data plane exists in the virtual space; in a physical space, a control plane is responsible for completing network flow forwarding control, a controller constructs an agent for executing a DT-DRL routing algorithm, the agent is recorded as a DRL-Agent, and the DRL-Agent plans a proper forwarding path for each piece of network flow based on a routing algorithm calculation model and network state information provided by digital twinning. According to the invention, through digital twinborn sensing, network environment data analysis and routing algorithm optimization, multi-dimensional ...

Methyl chloroacetate continuous synthesis process and synthesis system

The invention provides a methyl chloroacetate synthesis process which comprises the following steps: firstly, methanol and preheated chloroacetic acid are fed into a tower kettle of a reactive distillation tower for reaction to obtain a reaction system, then the reaction system is rectified through the reactive distillation tower to obtain a rectified system, and the rectified system is discharged from the tower top of the reactive distillation tower to obtain methyl chloroacetate. Carrying out condensation and oil-water separation to obtain a heavy phase; and finally, feeding the heavy phase obtained in the previous step into a crude ester refining rectifying tower to rectify again, and extracting from the bottom of the crude ester refining rectifying tower to obtain methyl chloroacetate. The invention also provides a methyl chloroacetate synthesis system. The methyl chloroacetate synthesis process designed by the invention is a novel continuous low-energy-consumption methyl chloroacetate ...

Determination method of corrosion limit safety curved surface of underground corrosion factor and material selection method of underground tubular column three-dimensional plate

The invention discloses a method for determining a corrosion limit safety curved surface of an underground corrosion factor and a method for selecting a three-dimensional chart of an underground pipe column, and belongs to the field of oil and gas well pipe material selection and corrosion protection. By carrying out an indoor corrosion experiment under the combined action of a plurality of main corrosion factors in the actual environment of the to-be-selected well area, according to the corrosion rate control index of the to-be-selected well area, the corrosion rate of the to-be-selected well area is calculated by utilizing curve, fitting and curved surface fitting methods. A three-dimensional material selection plate which contains three factors and can visually reflect a material corrosion safety area and a material corrosion danger area is manufactured, finally, underground corrosion factor values of a well to be selected are put into the three-dimensional material selection plate, ...

Transfer device and method with heat preservation and condensation prevention functions for concrete construction

The invention discloses a transfer device with heat preservation and condensation prevention functions for concrete construction and a method, and relates to the technical field of concrete moisturizing. The transfer device comprises a device body, a stirring cavity stirring mechanism is arranged on the inner side wall of the device body, and the stirring mechanism is arranged in the device body; an operator can open the stirring mechanism to stir concrete in the stirring cavity and prevent the concrete from being condensed in the stirring cavity, the scraping mechanism is arranged on the stirring mechanism, after the stirring mechanism stirs the concrete, the scraping mechanism can be driven, and through the arrangement of a transmission rod and a stirring transverse shaft, when the concrete stirring device is used, the scraping mechanism can be driven to rotate; when more concrete exists in the stirring cavity, an operator can start a starting motor, the starting motor drives a transmission ...

Preparation method of quick-acting calcium type fermented high-calcium vegetable powder

According to the preparation method of the quick-acting calcium type fermented high-calcium vegetable powder provided by the invention, lactic acid generated by fermentation can effectively convert calcium compounds such as water-soluble calcium, calcium carbonate and calcium pectin in the high-calcium vegetable powder into calcium lactate, and the conversion rate is up to 82.59%. The calcium lactate is a quick-acting calcium supplement, has the advantages of high solubility, high dissolution speed, high bioavailability and the like, does not stimulate the stomach, has no side effect of forming precipitates, does not generate calcium crystals, and is easily absorbed by people and animals. Meanwhile, the prepared fermented high-calcium vegetable powder not only has preservative, fresh-keeping and storage-resistant properties, but also has the effects of probiotics, and a new quick-acting calcium high-calcium vegetable powder raw material is provided for preparing a series of new products ...

Preparation method of early strength cement clinker, early strength cement clinker and early strength cement

The invention relates to the technical field of building materials, in particular to a preparation method of an early strength cement clinker, the early strength cement clinker and early strength cement.The preparation method of the early strength cement clinker comprises the steps that an aqueous solution is sprayed to the surface of ordinary Portland cement clinker which is air-cooled to 500-600 DEG C, and the ordinary Portland cement clinker is rapidly cooled to the room temperature; and finally, grinding to obtain the early strength cement clinker. Wherein the spraying amount of the aqueous solution accounts for 20-40% of the mass of the ordinary Portland cement clinker, and the mixing amount of the lime accounts for 1-2% of the total mass of the early strength cement clinker; the early strength cement comprises 90-95% of early strength cement clinker and 5-10% of construction waste mortar. According to the preparation method of the early strength cement clinker, the early strength ...

VIRTUAL PRODUCT SWITCHING METHOD FOR ELECTRONIC PRODUCT PRODUCTION LINE

Disclosed in the present invention is a virtual product switching method for an electronic product production line, comprising the following steps: performing modeling in a simulation system according to layout planning of a main assembly line and a special production platform required for the switching of electronic products, and building a three-dimensional model library in an upper computer; modularizing the built three-dimensional model library and then packaging same; performing unit modularization algorithm solving, whole line execution and scheduling algorithm in combination with the three-dimensional model library to determine an initial scheme of product switching; quickly rebuilding the three-dimensional model library in the upper computer through flexible scheduling by the special production platform; performing whole line assembly on the three-dimensional model library, performing logic script compilation by the rebuilt three-dimensional model library, and finally re-packaging ...

OPEN LOOP POWER CONTROL METHOD AND APPARATUS

Disclosed in the embodiments of the present invention are an open loop power control method and apparatus, used for saving transmission power and improving the success rate for establishing links in extreme channel environments. The method of the embodiments of the present invention is: in an open loop power control phase of a downlink DPCH channel, determining the open loop transmission power of the current power ramp period, and detecting the synchronisation state of the uplink DPCCH channel paired with the downlink DPCH channel; when determining that the synchronisation state of the uplink DPCCH channel is unsynchronised, then according to a preset power ramp step size, raising the open loop transmission power of the current power ramp period to obtain the transmission power of the next power ramp period; and when determining that the synchronisation state of the uplink DPCCH channel is synchronised, ending the open-loop power control phase.

新信息昆虫诱捕器

注塑鞋底（澳派88）

握力器

无线充电器

婴幼儿监视器（81RX）

婴幼儿监视器（61TX）

床屏（285#）

Mould plastics mould of flexible glue product

... 本实用新型属于注塑模具技术领域，尤其涉及一种注塑软胶产品的模具，包括母模和公模，在母模邻近公模的面上固定设有弹性构件，在公模邻近母模的面上对应弹性构件处设有凹陷部，或者在公模邻近母模的面上固定设有弹性构件，在母模邻近公模的面上对应弹性构件处设有凹陷部；弹性构件位于邻接面外侧部分的长度大于凹陷部的深度；由于母模和公模扣合之后会对弹性构件进行压缩，开模时在弹性构件的弹力作用使母模和公模分开一定间隙，能够降低两者分离时的开模速度，适当延长分离时间，使用空气能进到软胶与母模之间，减小真空范围，从而降低母模与产品软胶部分的抓力，防止开模时造成产品结构被破坏及损坏产品的外观，提高了产品的良率。 ...

Experimental instrument moving equipment

The utility model discloses an experimental instrument moving device which comprises a pair of supporting plates used for supporting the experimental instrument moving device. The damping structure is arranged on the lower surfaces of the pair of supporting plates; the moving structure is arranged on the lower surface of the damping structure; the connecting structure is arranged on the pair of supporting plates; the pushing structure is arranged on the pair of supporting plates; the lifting structure is arranged on the upper surfaces of the pair of supporting plates; the utility model relates to the field of experimental apparatus movement, prevents large-scale experimental apparatuses from being damaged during movement, and is relatively simple in structure and convenient to use.

Method, device and equipment for dividing soil layer interface based on static cone penetration test

The invention discloses a method, a device and equipment for dividing a soil layer interface based on a static cone penetration test. The method comprises the following steps: performing a static penetration test on a soil layer to obtain static penetration test data; determining a data packet length; grouping the static sounding test data through the data grouping length to obtain multiple groups of grouped static sounding test data; detecting the multiple groups of grouped static sounding test data through a preset soil layer interface detection model to obtain the number of soil layer interfaces of each group of data; according to the number of the soil layer interfaces of each group of data, obtaining data of the maximum number of the soil layer interfaces in different grouping modes and the corresponding grouping modes; the optimal segmentation method is adopted to calculate the optimal segmentation point according to the maximum soil layer interface number data and the grouping mode ...

Mining area pavement rockfall identification method and device, chip, terminal, equipment and medium

The invention provides a mining area pavement rockfall identification method and device, a chip, a terminal, equipment and a medium, and relates to the field of data processing. The method comprises the following steps: acquiring a mining area pavement image through an image acquisition device, and acquiring point cloud data corresponding to the mining area pavement image through a laser radar; inputting the point cloud data into a point cloud detection model, outputting a target category and a target bounding box corresponding to the target category, and determining target point cloud data in the target bounding box; projecting the target point cloud data onto the mining area pavement image to obtain a target image corresponding to the target point cloud data; inputting the target image into a rockfall classification recognition model, and outputting rockfall classification information; wherein the rockfall classification and identification model comprises a pyramid network structure, ...

Variable ornithopter with empennage in linkage control

The invention relates to an empennage linkage control variable ornithopter, and belongs to the technical field of ornithopters. The front end of the hollow cup motor is fixedly connected with a motor support in the flapping wing support, an output shaft of the hollow cup motor extends to the other side of the motor support to be connected with a horizontal cam of the flapping wing mechanism, and the rear end of the hollow cup motor is fixedly connected with the empennage support. The front end of the empennage support is further fixedly connected with the two flapping wing supporting rods, the middle of the empennage support is connected with the vertical empennage mechanism, the rear end of the empennage support is connected with the horizontal empennage mechanism, and a vertical empennage of the vertical empennage mechanism is fixedly bonded with a horizontal empennage of the horizontal empennage mechanism. The flapping-wing aircraft has the advantages that the structure is novel, the ...

Environment-friendly flame-retardant water-blocking anticorrosive filling paste as well as preparation method and application thereof

The invention relates to environment-friendly flame-retardant waterproof anticorrosive filling paste which is prepared from the following raw materials in parts by weight: 10-33 parts of a soap-based thickening agent, 5-15 parts of a plasticizer, 20-50 parts of base oil, 10-30 parts of an organic flame retardant, 1-8 parts of an inorganic flame retardant and 2-12 parts of an auxiliary agent. The soap-based thickening agent in the raw materials of the filling paste adopts a proper amount of high-base-number synthetic calcium sulfonate and high-base-number synthetic magnesium sulfonate, and is compounded with the organic flame retardant and the synthetic base oil in a certain proportion, so that the high-low-temperature adaptability of the environment-friendly flame-retardant water-blocking corrosion-resistant filling paste is remarkably improved, and the filling paste has a relatively high ignition point; and the penetration change rate is relatively low under the environment fluctuation ...

Novel discrete time specified performance reinforcement learning unmanned ship course tracking control method and system

The invention provides a novel discrete time specified performance reinforcement learning unmanned ship course tracking control method and system. The method comprises the following steps: constructing an unmanned ship discrete time dynamic model; constructing an unmanned ship course tracking change system; according to the course angular velocity dynamic error, constraining the course angular velocity dynamic error in a specified range, designing a discrete time error constraint transformation method, and calculating an unconstrained system error; designing an unmanned ship reinforcement learning evaluation module according to the unconstrained system error; and designing an unmanned ship course tracking controller based on an unmanned ship reinforcement learning evaluation module and an unconstrained system error, obtaining an unmanned ship rudder angle instruction, transmitting the rudder angle instruction to an unmanned ship steering engine to output an unmanned ship course angle, and ...

Water supply energy consumption analysis and management system based on data analysis

The invention relates to the technical field of water supply control, in particular to a water supply energy consumption analysis and management system based on data analysis. Comprising a server, a data acquisition unit, a water consumption analysis unit, a change analysis unit, a loss analysis unit and a control unit, water supply amount and energy consumption amount are subjected to formulation analysis to obtain a water consumption value, deepening analysis is performed according to the water consumption value to obtain a change deviation value, the change deviation value is compared and analyzed with a set interval to generate a resource waste signal or a water supply energy consumption deviation abnormal signal, and an alarm and a character display instruction are triggered respectively. By monitoring the deviation degree of the water supply energy consumption and triggering the alarm, the efficiency of a water supply system is improved, energy is saved, and the water supply quality ...

Application of 3-hydroxyphenylacetic acid in preparation of medicine for preventing and/or treating reproductive dysfunction of elderly men

The invention provides application of 3-hydroxyphenylacetic acid in preparation of a medicine for preventing and/or treating reproductive dysfunction of elderly men. The effect of 3-hydroxyphenylacetic acid in senescent mouse testis spermatogenic dysfunction is discussed through a senescent mouse model, the result shows that 3-hydroxyphenylacetic acid can improve the sperm concentration of the senescent mouse, and through testis tissue HE staining, it is found that 3-hydroxyphenylacetic acid can enable senescent mouse testis endospermatogenic cells to be arranged more orderly, so that the spermatogenic dysfunction of the senescent mouse testis is improved, and the spermatogenic dysfunction of the senescent mouse testis is improved. Testicular immunofluorescence shows that spermatogenic cells at all levels are significantly increased after treatment with 3-hydroxyphenylacetic acid. The invention also finds that the 3-hydroxyphenylacetic acid can reduce the oxidative stress level of the aged ...

Optical fiber coupling method of 90-degree off-axis parabolic mirror

The invention discloses an optical fiber coupling method of a 90-degree off-axis parabolic mirror. The adjustment method comprises the following steps: firstly, calibrating the position relationship between the laser interferometer and the 90-degree off-axis parabolic mirror by using the standard spherical mirror, then replacing the standard spherical mirror with an optical fiber, and determining the position of the Z axis. A plane mirror is fixed on a tool of a 90-degree off-axis parabolic mirror, so that the plane mirror is located behind the 90-degree off-axis parabolic mirror, and parallel light emitted by a laser interferometer can reach the parabolic mirror and the plane mirror at the same time. And the angle of the plane mirror is adjusted to enable the light beams reaching the plane mirror and the parabolic mirror to be parallel. A laser interferometer is replaced by a collimator, and the position of a light spot of the optical fiber coincides with the position of a light spot reflected ...

Highway vehicle track splicing method based on radar data

The invention relates to the technical field of vehicle track splicing, in particular to a radar data-based highway vehicle track splicing method, which comprises the following steps of: acquiring vehicle track data of a plurality of radars in real time; abnormal data points in the vehicle trajectory data are preprocessed; dividing the preprocessed vehicle track point data according to lanes; performing coordinate system unification on the positions of the road vehicles in each radar vision field range; traversing the vehicle trajectory data processed by two adjacent radars, determining a unified trajectory point of the two trajectories according to matching conditions if a coincident part exists in a corresponding time period of every two trajectories on the same lane, splicing the trajectories, if lane change occurs, determining that the predicted trajectory point and the actual trajectory point are on the same lane and have a distance difference of 15m, and if lane change occurs, determining ...

PROCESS AND APPARATUS FOR PREPARING TEREPHTHALIC ACID BY AIR OXIDATION OF PARA-XYLENE

Disclosed are a process and an apparatus for preparing terephthalic acid by air oxidation of para-xylene. Said process is: in a reaction system with oxidation reactor and crystallizer connecting in series, para-xylene with dissolved metalloporphyrins or mixed catalyst of metalloporphyrins and metal salt, and air, oxygen-poor air, oxygen-rich air or carbon-dioxide-containing air are fed into the oxidation reactor which stay in the reactor for 70-180 minutes at 140-200 °C. The oxidation mixture crystallizes by flooding or being pumped into crystallizer. Para-xylene, para-toluic acid and para-methyl benzyl alcohol obtained by separation are fed into oxidation reactor, mixed with para-xylene containing metalloporphyrins catalyst for the second oxidation, and the crystals are purified to obtain purified terephthalic acid. In the present invention para-xylene is oxidized directly into terephthalic acid, the energy consumption is low, the production efficiency is high, and the conversion of para-xylene ...

PROFILED METAL CONSTRUCTION FORMING METHOD

Disclosed is a profiled metal construction forming method. The method consists of firstly preparing a prefabricated blank; then making the prefabricated blank into an hourglass-shaped module; and forge welding the prefabricated blank into a blank by heating the hourglass-shaped module and then performing an upsetting deformation in the height direction and performing heat preservation during forging on same. The deformation in the upsetting process can be centralized in an interface position of the hourglass-shaped module blank by means of the method, and the generation of surface tensile stress is prevented, so that the blank is uniformly suffered from higher compressive stress, and the surface tensile stress state of the blank is improved. The method can also increase the metal construction forming yield, and can greatly improve the production efficiency under the condition of using the press of the same specifications.

SOLAR ENERGY INSECT KILLER

Disclosed is a solar energy insect killer suitable for the field of insect-catching instruments, comprising a pillar (1), a solar panel (2) located at the top end of the pillar (1), a distribution box (8) and an LED deinsectization lamp subassembly (3) located on the pillar(1), a funnel (4) located under the LED deinsectization lamp subassembly (3), and an insect collection container connected to the bottom of the funnel (4) and in communication with the funnel (4), wherein the LED deinsectization lamp subassembly (3) is connected onto the pillar (1) via a holder (6), and is electrically connected to the distribution box (8). By arranging the solar panel (2), the distribution box (8) and the LED deinsectization lamp subassembly (3) on the pillar (1), solar energy can be converted into electric energy and supplies power to the LED deinsectization lamp subassembly (3). Thus, not only will the effect of killing injurious insects without environmental pollution be achieved, but also the condition ...

VIDEO SURVEILLANCE ADAPTIVE DISPLAY METHOD AND DEVICE

The present invention discloses a video surveillance adaptive display method and a device. The device comprises: a first acquisition module, a second acquisition module, a first judging module, a second judging module, a first determining module, a second determining module, a compression module and a display module. According to the disclosed video surveillance adaptive display method and device, a compression coefficient can be adjusted according to different graphics card performance so as to meet the display requirements in multiple scenes; it solves display problems caused by lack of performance of graphics card, thereby effectively reducing costs, and it is easy to use, which promotes user experience.

CONTROL METHOD AND DEVICE FOR DISTRIBUTED DIRECT CURRENT POWER SUPPLY SYSTEM

Embodiments of the present disclosure provide a control method and device for a distributed direct current power supply system. The method comprises: obtaining a direct current bus current of a distributed direct current power supply system; obtaining, according to the direct current bus current and the rated capacity of conversion power supply units in the distributed direct current power supply system, the number of the conversion power supply units that meets the load power supply demand; and adjusting, according to the number of conversion power supply units, conversion power supply units that are turned on in the distributed direct current power supply system. The device is used for executing the method.

NEW EFFICIENT WASTE HEAT RECYCLING AND FLUE GAS WHITE SMOKE REMOVAL INTEGRATED DEVICE

A new efficient waste heat recycling and flue gas white smoke removal integrated device, comprising a heat exchanger (1), wherein an air inlet (11) and an air outlet (12) are provided in the heat exchanger (1), a plate-type air duct is arranged inside the heat exchanger, two ends of the plate-type air duct respectively extend to the corresponding air inlet (11) and the corresponding air outlet (12), a first fan (2) is arranged at the air inlet (11), and a smoke inlet (13), a smoke exhaust port (14) and a liquid discharge port (15) are respectively provided in the top and bottom of the heat exchanger (1); a smoke intake conduit (3), wherein the smoke intake conduit (3) is connected to the smoke inlet (13); a gas exhaust conduit, wherein the gas exhaust conduit comprises an air exhaust conduit (4) and a smoke exhaust conduit (5), one end of the air exhaust conduit (4) being in communication with the air outlet (12), one end of the smoke exhaust conduit (5) being in communication with the ...

Chip wiring optimization method and software system

The invention provides a chip wiring optimization method and a software system. The method comprises the following steps: acquiring a chip layout information file; constructing a dynamic grid; dividing all fly wires into a two-end wire net and a multi-end wire net; sorting all the two-end wire nets and all the multi-end wire nets according to a preset sorting rule; wiring the two-end wire net and the multi-end wire net; judging whether the completed wiring violates a preset constraint or not: if yes, finding out key grid points violating a short circuit constraint in the constraint in all paths of each wiring, and returning to the previous step after limiting the key grid points; if not, entering the next step; each path conforming to the constraint is copied to blocks of other corresponding templates of the same kind; judging whether the paths of all the fly lines are searched or not; if so, writing the paths of all the fly lines into an output result file; and if not, reducing the current ...

Sampling steel cylinder inner wall treatment method, silanization treatment agent and sampling steel cylinder

The invention relates to the field of metal treatment, in particular to a sampling steel cylinder inner wall treatment method, a silanization treatment agent and a sampling steel cylinder. The invention provides a silanization treatment agent for the inner wall of a sampling steel cylinder. The silanization treatment agent comprises the following components: 2-10 wt% of a silane coupling agent; 10 wt% to 20 wt% of a modifier; 10 wt% to 20 wt% of an alcohol solvent; and the balance of water. The silanization treatment agent can form a composite film layer on the inner surface of the sampling steel cylinder, the inner wall of the steel cylinder is effectively prevented from adsorbing active impurities, meanwhile, the inner wall is firmly passivated, and long-term use of the steel cylinder can be achieved. Experiments show that the contents of the impurity gases in the sampling steel cylinder treated by the silanization treatment agent are analyzed and detected in different storage times, ...

Soluble liquid bridge plug, preparation method and horizontal well segmented water plugging method

The invention particularly relates to a soluble liquid bridge plug, a preparation method and a horizontal well segmented water plugging method, and belongs to the technical field of oil exploitation. The soluble liquid bridge plug is prepared from the following raw materials: a temperature-resistant salt-resistant monomer, an acrylamide monomer, degradable macromolecular polyester particles, a cross-linking agent, a retarder, an initiator and a density regulator. The soluble liquid bridge plug prepared from the raw materials has viscoelasticity, so that the soluble liquid bridge plug can effectively plug a horizontal section of a horizontal well, and the soluble liquid bridge plug has water solubility, so that the soluble liquid bridge plug in a water outlet target section can be replaced in a water drive manner, and the subsequent plugging of the water outlet target section is facilitated. In addition, the soluble liquid bridge plug has good injectability, temperature resistance, salt ...

Methylation marker, primer probe combination and kit for colorectal cancer detection and application of methylation marker, primer probe combination and kit

The invention discloses a methylation marker for detecting colorectal cancer. The methylation marker related to the colorectal cancer comprises a CpG methylation site cg08392199 of an LIFR gene. The primer probe combination for detecting the colorectal cancer methylation marker comprises an LIFR-F upstream primer, an LIFR-R downstream primer and an LIFR-P probe. The kit comprises the primer probe combination. The invention further relates to application of the methylation marker related to the colorectal cancer to preparation of the kit and application of the kit to preparation of products for detecting the colorectal cancer. The cg08392199 site disclosed by the invention has high sensitivity and high specificity in colorectal cancer detection, the sensitivity reaches 91%, and the specificity reaches up to 100%.

Method, device and equipment for evaluating flexible climbing performance of power generation enterprise and storage medium

The invention discloses a power generation enterprise flexible climbing performance evaluation method, device and equipment and a storage medium, and the method comprises the steps: constructing a comprehensive evaluation index system of the power generation enterprise flexible climbing performance according to a preset static evaluation index and a dynamic evaluation index; according to a unit nameplate and configuration information of the power generation enterprise and the acquired power data, index data values of evaluation indexes in the comprehensive evaluation index system are calculated respectively, and weights of a static evaluation index and a dynamic evaluation index are calculated by using a subjective and objective weighting method; and calculating a comprehensive evaluation result of the flexible climbing performance of the power generation enterprises according to the weighting result, and obtaining the ranking of the flexible climbing performance of each power generation ...

Mace type expansion joint device

The invention provides a spiked club type expanded connection device which comprises a base and a plurality of sets of hydraulic units arranged on the base, the base is provided with a central oil hole extending along the axis of the base and passing through the axis, and the hydraulic units in each set of hydraulic units are evenly distributed in a radial shape with the central oil hole as the center. One end of a piston cavity of each hydraulic unit is communicated with the center oil hole through a communicating hole, piston rods in the multiple sets of hydraulic units move synchronously, the hydraulic units with the same moving direction form a row of hydraulic units, and two edge oil holes parallel to the center oil hole are formed in the base corresponding to each row of hydraulic units; the two edge oil holes are located in the two sides of the axis of the piston cavity of the row of hydraulic units respectively, and the end, away from the communicating hole, of the piston cavity ...

Dustproof cleaning equipment of ventilator

The dustproof cleaning equipment comprises an annular shell, the inner wall of one end of the annular shell is a slope, at least three fan-shaped folding shielding pieces are rotationally connected into the annular shell, and rotating torsion springs are arranged on rotating shafts of the fan-shaped folding shielding pieces. The second air duct and the annular shell are used as a whole and can move away from the first air duct, after the annular shell is completely separated from the first air duct, the multiple fan-shaped folding rubber covers are unfolded under the elasticity of the fan-shaped folding rubber covers and the elastic reset action of the elastic steel sheets of the internal framework, and the sleeve is surrounded in the center, so that the fan-shaped folding rubber covers are folded, and the sleeve is folded. And when the fan is washed subsequently, the adverse effect of splashed water on the driving motor can be reduced.

Synthetic jet exciter with adjustable electrode distance and use method

The invention belongs to the field of jet exciters, and particularly relates to a synthetic jet exciter with the adjustable electrode distance and a using method, and the exciter comprises an exciter body, a power source, a moving device and two electrodes; a discharge cavity is formed in the exciter body, and a jet hole is formed in the exciter body; two electrode mounting holes are formed in the exciter body, and at least one electrode is arranged in the electrode mounting hole in a sliding manner; according to the jet flow intensity regulation and control device, jet flow intensity regulation and control are achieved through combination of electrode distance control and power supply voltage control, and jet flows of different intensities can be generated under the optimal matching parameters of the distance between the electrodes and the voltage magnitude; compared with a conventional mode that jet flows with different intensities are regulated and controlled by replacing a capacitor ...

Multistage continuous separator for mine respirable dust

A primary virtual impact cavity and a secondary virtual impact cavity are formed in a cavity of the separator, a primary dust collecting and filtering cavity which is integrally suspended and communicated with the outside of the cavity of the separator is formed in the primary virtual impact cavity, an inlet nozzle is arranged at the top end of the cavity of the separator, and a secondary dust collecting and filtering cavity is formed in the top end of the cavity of the separator. The inlet nozzle is communicated with the primary virtual impact cavity through a primary acceleration channel, the primary virtual impact cavity is communicated with the primary dust collecting and filtering cavity through a first access pipe, and a secondary dust collecting and filtering cavity which is integrally suspended and is communicated with the outside of the separator cavity is arranged in the secondary virtual impact cavity; the primary virtual impact cavity is communicated with the secondary virtual ...

Emergency interconnection method and device for multi-unit direct current system of power plant

The invention provides an emergency interconnection method and device for a multi-unit direct current system of a power plant, and relates to the technical field of direct current power systems, and the method comprises the steps: determining a to-be-interconnected target unit from a plurality of units in response to the determination that any unit in the multi-unit direct current system is in a fault state at present; switching on a first emergency interconnection switch and a second emergency interconnection switch corresponding to the any unit, so that the any unit can be switched on based on a first emergency interconnection cable connected with the first emergency interconnection switch and a second emergency interconnection cable connected with the second emergency interconnection switch; and acquiring the emergency power supply from the direct current bus of the target unit. Therefore, when a certain unit breaks down and the direct-current system and the standby charging device cannot ...

Bionic scalpel based on leech teeth

The invention discloses a bionic scalpel based on leech teeth, and relates to the technical field of medical tools. The problem that the cutting position is inaccurate due to non-uniform deformation and movement of existing scalpel blade tissue is solved. The cutter comprises a blade and a cutter handle, the cutter tail end of the blade is fixedly connected with the cutter handle, a cutting edge is arranged on the edge of the lower side of the cutter head end of the blade, cutting cutter faces are arranged on the two sides of the cutting edge, the included angle between the cutting cutter faces on the two sides is alpha, a plurality of arc grooves are evenly distributed in the cutting cutter faces in the length direction, and the arc grooves are formed at intervals. Each arc-shaped groove is formed in the width direction of the cutting tool face, and the arc-shaped grooves in the cutting tool faces on the two sides are arranged in a staggered mode. The device is used for medical operations ...

AUTOMOBILE CAVITY BARRIER COMPONENT AND METHOD FOR USING SAME

An automobile cavity barrier component and a method for using same. The automobile cavity barrier component comprises a closed hexahedron-shaped framework; the front and back surfaces of the framework are respectively provided with a reinforced layer and a vibration-absorbing layer; a buckle for securing the cavity barrier component is arranged on the reinforced layer; the buckle penetrates the reinforced layer and forms an integrated structure with the framework; the upper and lower surfaces of the framework are respectively provided with an unfoamed foam material layer; the left and right surfaces of the framework are uneven surfaces with reinforcing bars; and the uneven surfaces are attached with an unfoamed foam material layer. The buckle is clamped on the cavity sheet metal of an automobile, the vibration-absorbing layer is adhered to the cavity sheet metal, and the cavity barrier component is baked via electrophoresis to cause the foam material layer to foam so as to block and seal ...

FILE DELIVERY METHOD, APPARATUS, AND SYSTEM

A file delivery method comprises: receiving a task request, sent by a target node, about a file delivery task; determining, according to the task request, whether completion nodes exist; if so, specifying a node from the completion nodes as a source station corresponding to the task request; or if not, specifying a source server as a source station corresponding to the task request; and issuing the file delivery task to the target node according to the specified source station. Besides, also provided are a corresponding apparatus and system.

Full automatic packing device of two accuses of single cylinder

... 一种单缸双控全自动包装装置。称重和包装装置也是自动化生产系统中最重要的最复杂的设备之一，散装粒子的称重和包装是常见的生产形状，实现自动称量和包装是提高生产率、降低工人劳动强度和保障工人人身安全等多方面要求。一种单缸双控全自动包装装置，其组成包括：机架（1），机架分别与双孔平行梁（4）和储料斗门气缸（2）连接，储料斗门气缸通过气缸连接杆两端的滑动杆组件（3）分别与储料斗一（5）和储料斗二（6）连接，储料斗一下部具有称量料斗一(7)，储料斗二下部具有称量料斗二（8），称量料斗一和称量料斗二下部具有包装机构（9），包装机构具有一组包装袋（17）。本实用新型应用于称量包装设备。 ...

On-chip exchange switch architecture and design method

The invention provides an on-chip exchange switch architecture and a design method, the architecture comprises M inlet modules, M * N intersection point modules in M rows and N columns and N outlet modules, the inlet modules and the intersection point modules are interconnected through streaming interfaces, the intersection point modules are interconnected through streaming interfaces, and the intersection point modules and the outlet modules are interconnected through streaming interfaces. And a data packet is input from the inlet module, transmitted to the intersection point module in the corresponding row, and then transmitted to the outlet module in the corresponding column to be output by the intersection point module, so that the transmission of the data packet from M inputs to N outputs is realized. According to the technical scheme, an on-chip exchange switch function can be realized in a single on-chip system, a multicast function and logic resource cutting are supported at the ...

Control method and equipment for preventing clamping stagnation of pawl, medium, transmission and vehicle

The invention relates to the technical field of transmissions, in particular to a control method and equipment for preventing clamping stagnation of a pawl, a medium, a transmission and a vehicle. And when the transmission enters P control, the rotating speed of the input shaft of the transmission is obtained, if the rotating speed of the input shaft meets the parking condition, the parking mechanism is controlled to clamp the pawl into the gear, and P-gear parking operation is completed. When the transmission enters P, the oil pressure of the clutch is judged according to the rotating speed value of the input shaft of the transmission, and when the rotating speed of the input shaft of the transmission is high, the clutch does not transmit torque; the clutch oil pressure can be accurately reflected, the control accuracy can be improved, and the probability of pawl clamping stagnation after the transmission is engaged into the P gear is reduced.

Phenyl substituted compound as well as preparation method and application thereof

The invention belongs to the field of medical chemistry, and particularly relates to a phenyl substituted compound, a preparation method thereof and an application of the phenyl substituted compound as a reference substance in preparation of (R)-3-(1-(2-(2-methoxyphenyl)-2-((tetrahydro-2H-pyran-4-yl) oxy) ethyl)-5-methyl-6-(oxazole-2-yl)-2, 4-dioxo-1, 2-dihydrothieno [2, 4-b] pyridine. The invention relates to an application of qualitative and/or quantitative analysis of related impurities in research on the quality of a crude drug of [1, 2, 3-d] pyrimidine-3 (4H)-yl) benzoic acid.

PU (Polyurethane) composite leather capable of being weakened by laser and preparation method of PU composite leather

The invention discloses PU (polyurethane) composite leather capable of being weakened by laser, which comprises a base cloth layer, an adhesive layer connected with the base cloth layer, a surface layer connected with the adhesive layer and a surface treatment layer connected with the surface layer, and a high-solid layer is coated between the surface layer and the adhesive layer; the high solid layer is prepared from the following raw materials in parts by weight: 95 to 105 parts of diphenylmethane-4, 4 '-diisocyanate; 45 to 55 parts of toluene diisocynate; 6-8 parts of an amine curing agent; 6 to 8 parts of dimethyl carbonate; 0.8 to 1 part of foaming agent; the invention also provides a preparation method of the PU composite leather. The preparation method comprises the following steps: coating the surface layer, coating the high-solid layer, coating the adhesive layer, adhering the base cloth layer together, stripping, curing, and treating the surface layer. The PU composite leather ...

Underwater robot and control method thereof

The invention discloses an underwater robot and a control method thereof.The underwater robot comprises a robot body, a sewage suction opening is formed in the bottom of the robot body, and a first drainage opening communicating with the sewage suction opening is formed in the top of the robot body; the bottom of the robot body is further provided with a second water outlet communicating with the first water outlet, and the second water outlet is located in the side, close to the front end, of the dirt suction opening. The water pumping mechanism is arranged in the robot main body and is close to the first water outlet; the water pumping mechanism has a first state for controlling water flow to flow in from the sewage suction port and to be discharged through the first water discharge port and a second state for controlling water flow to flow in from the first water discharge port and to be discharged through the second water discharge port; the front end of the robot body can be lifted ...

Bypass valve with high sealing performance

The invention relates to the technical field of bypass valves, in particular to a high-sealing-performance bypass valve which comprises a connecting pipe, the connecting pipe is arranged between a three-way pipe and a switch valve, a driving assembly used for increasing the tightness between the connecting pipe and the three-way pipe is arranged in the connecting pipe, and mounting cavities which are symmetrically arranged are formed in the connecting pipe; a containing cavity is formed in the connecting pipe, the driving assembly comprises a rotating plate, an extrusion ring and an ejector block, the rotating plate is rotationally arranged in the containing cavity, and two linkage rods are symmetrically arranged between the extrusion ring and the rotating plate. After water is introduced into the three-way pipe, certain kinetic energy is generated on the rotating plate according to the pressure of water flow in the connecting pipe, so that the rotating plate rotates, the connecting pipe ...

Tunnel air purification equipment and bidirectional electrostatic dust collection method thereof

The invention relates to tunnel air purification equipment which can be mounted behind a wind tower in a tunnel and can ensure that air in the tunnel can be effectively purified no matter whether the tunnel adopts shunting mode ventilation or confluence mode ventilation. The purification equipment pumps air through the first fan or the second fan, so that the air in the tunnel passes through the dust removal assembly and then is exhausted in the direction the same as the tunnel ventilation direction; specifically, a first draught fan or a second draught fan is matched with a second wind shielding device or a first wind shielding device to close a corresponding air inlet, and communication between a first air channel or a second air channel and the driving space in the tunnel is achieved. The first air duct and the first fan therein are symmetrically arranged, and the second air duct and the second fan therein are symmetrically arranged, so that airflow sucked into the air purification equipment ...

Flatness detector for electronic display screen

The invention relates to the technical field of display screen detection, in particular to an electronic display screen flatness detector which comprises a detection table, a supporting rod is arranged on the outer wall of the top of the detection table, a mounting plate is arranged at the top end of the supporting rod, a fixing frame is arranged on the outer wall of the bottom of the mounting plate, and a rail rod is fixedly arranged on the inner wall of the fixing frame. A sliding block is arranged on the outer side of the track rod in a sliding mode, a moving block is arranged on the upper surface of the sliding block, a sliding groove is formed in the outer wall of the bottom of the moving block, a detection assembly is arranged in the sliding groove and comprises an infrared distance measuring sensor, and a fixing groove is formed in the upper surface of the detection table. According to the electronic display screen flatness detection device and method, the influence of vibration ...

Fine urban land use type identification model training method

The invention discloses a fine urban land use type identification model training method, which comprises the following steps: dividing a land parcel area into a plurality of grids arranged in grids, taking the land parcel area as a land use identification window, taking a central grid of the land use identification window as a to-be-identified land parcel, and taking a grid adjacent to the central grid as an adjacent land parcel; obtaining feature data of each grid, wherein the feature data comprises a point-of-interest type, a land type, a population density type and whether the grid is in a central urban area; selecting a land parcel with a known land type as a central land parcel of the land identification window, taking a land parcel adjacent to the central land parcel as a sample, taking the feature data of the sample as a feature set, and constructing a sample feature data set; and taking the sample feature data set as model input, taking the sample tag data set as model output, and ...

Construction method of fabricated building laminated slab

The invention relates to a construction method of an assembly type building laminated slab, which belongs to the technical field of building construction, and comprises the following steps: S1, surveying personnel performs paying-off according to a construction drawing, and determines the position of each supporting point of the laminated slab; s2, a supporting structure is installed according to the position of the supporting point, the supporting structure comprises a tripod, a main rod and an extension rod, the tripod is installed at the position of the supporting point obtained through surveying and setting out, one end of the main rod is fixedly connected with the tripod, and an extension plate is slidably connected with the main rod; s3, a lifting hook of a crane is used for being connected with the laminated slab, the laminated slab is hoisted, and the laminated slab is hoisted to the position above the supporting structure; and S4, electromechanical pipelines are laid according ...