沙发（R918）

Linkage impregnation equipment for long-fiber thermoplastic composite material

The invention discloses linkage impregnation equipment for a long-fiber thermoplastic composite material. The linkage impregnation equipment comprises a combined pushing device, a transition device, an impregnation fusion device and a temperature control module, a fluid material runner, a transmission roller and a driven roller are arranged in the combined pushing device, a scraping body is arranged between the transmission roller and the driven roller, the transmission roller and the driven roller synchronously extrude the scraping body to be continuously attached to the transmission roller, meanwhile, materials are pushed, and the materials are prevented from being bonded to the transmission roller and the driven roller in the pushing process. Materials are continuously pushed through the arc-shaped concave-convex surfaces, and fibers in the materials can be effectively prevented from being broken; the dipping and fusing device comprises a working box body, and a driving device is arranged ...

Saccharomyces cerevisiae engineering strain with high yield of ceramide as well as construction method and application of saccharomyces cerevisiae engineering strain

The invention discloses a saccharomyces cerevisiae engineering strain with high yield of ceramide. The saccharomyces cerevisiae engineering strain is obtained by knocking out a YML115C gene as shown in SEQ ID NO.1 from saccharomyces cerevisiae host bacteria, and an amino acid sequence coded by the YML115C gene is as shown in SEQ ID NO.2. The invention further discloses a preparation method of the saccharomyces cerevisiae engineering strain. After the saccharomyces cerevisiae engineering strain constructed by the invention is fermented for 12 hours, ceramide reaches 8.90 mg/gDCW, which is 4.05 times that of a wild strain. According to the engineering strain, the ceramide yield is increased, fermentation conditions are simple, cell walls of the saccharomyces cerevisiae engineering strain are fragile, subsequent ceramide extraction is facilitated, the investment cost is reduced, and the engineering strain has wide development prospects.

Liquid crystal composition and liquid crystal display component

The invention belongs to the technical field of liquid crystal materials, and particularly relates to a liquid crystal composition and a liquid crystal display element or a liquid crystal display containing the liquid crystal composition. The liquid crystal composition comprises one or more compounds as shown in a formula I, one or more compounds as shown in a formula II and one or more compounds as shown in a formula III. The technical scheme provided by the invention has proper optical anisotropy, working temperature upper and lower limit range and dielectric anisotropy, and particularly has higher contrast ratio, good low-temperature intersolubility and higher low-temperature response speed; the liquid crystal composition can be used for developing a liquid crystal display with high contrast and high low-temperature response speed, and especially can improve the phenomenon of low-temperature smear. The liquid crystal composition is mainly applied to an IPS display mode and can be applied ...

MULTI-WINDOW DISPLAY METHOD AND DEVICE FOR BROWSER

A multi-window display method and device for a browser. The method comprises: during the opening of a current webpage window by a browser, detecting an opening operation used for opening a new webpage window of the browser; when the opening operation for opening the new webpage window is detected, creating the new webpage window and generating a multi-window display command; and according to the multi-window display command, displaying the current webpage window and the created new webpage window on the browser in a split-screen mode, or displaying the current webpage window and the created new webpage window in a cascade mode.

WIRELESS NETWORK THROUGHPUT EVALUATING METHOD AND DEVICE

A wireless network throughput evaluating method and device, comprising: acquiring historical throughput data of N base stations; according to the obtained historical throughput data of the N base stations, constructing a base station association network of the N base stations; according to the constructed base station association network and the obtained historical throughput data, finding M base stations important for the evaluation of a throughput of the base station association network, and considering the M base stations as important base stations; using the historical throughput data of the determined M base stations, evaluating a throughput of the remaining (N-M) base stations. In embodiments of the present invention, historical data of base station throughputs of selected important base stations is used to evaluate other base stations, thus reducing data complexity.

Feature fusion high-precision defect detection method with priori knowledge in power transmission project

The invention discloses a feature fusion high-precision defect detection method with priori knowledge in a power transmission project. The method comprises the following steps: acquiring a to-be-detected power transmission project image; inputting a to-be-detected power transmission project image into the trained power transmission project defect detection model, and outputting a first detection result and a second detection result; and processing the first detection result and the second detection result by adopting a non-maximum suppression algorithm to obtain a final detection frame. According to the method, prior analytic statistics is carried out on defects shot by unmanned aerial vehicle inspection on a power transmission project, a fusion method of a plurality of multi-scale feature pyramid variants is designed, and the fused multi-scale feature pyramid variants comprise a feature pyramid network (FPN) and a recursive feature pyramid network (RFPN). And a detected result is input ...

沙发（HY861）

3D label positioning prediction method and device based on machine learning PPO algorithm

The invention provides a 3D label positioning prediction method and device based on a machine learning PPO algorithm, and the method comprises the steps: constructing a Jacobi matrix based on a trilateration positioning method, and determining a 3D coordinate initial value of a label relative to a base station; setting a 3D coordinate error function of a prediction label and a corresponding error acceptable range, and screening label prediction 3D coordinate values conforming to the error function; on the basis of a machine learning PPO algorithm, a predicted label 3D coordinate value corresponding to a local error minimum value is sought; and performing minimum error search in a unit sphere range to obtain a final label prediction 3D coordinate value. According to the invention, the 3D coordinates of the label can be predicted according to the distance measurement from the label to the base station, and data smoothing processing is carried out on the label, so that the accuracy of tracking ...

Order insertion system and method considering production constraint and delivery time constraint

The invention discloses an order insertion system and method considering production constraints and delivery time constraints, and the system comprises a production capacity module, an order insertion module, an order insertion module and an order insertion module, aiming at the production feasibility of finished products or semi-finished products needing to be processed on different production organizations and the priorities, the production rates and the equipment starting rates on the corresponding production organizations; the non-production capacity module is used for defining the fixed consumed switching time for producing different products on the same organization by an enterprise and the turnover time for transferring the products; the work calendar module is used for defining work shift division, shift time and rest conditions when production organizations of the enterprise carry out production businesses; and the order module is used for defining order information of production ...

PCB BOARD HEATING METHOD AND APPARATUS, PCB BOARD COMPONENT AND ELECTRONIC DEVICE

A PCB board (6) heating method and apparatus (100), a PCB board component (60) and an electronic device. In the PCB board (6) heating method, a heating element (2) is embedded in a middle layer of the PCB board (6), and the heating method of the PCB board (6) comprises the following steps: collecting an ambient temperature where the PCB board (6) is located; and controlling the heating element (2) to heat the PCB board (6) when the ambient temperature is less than a pre-set ambient temperature. The PCB board (6) heating method can effectively improve the ability of an electronic device with the PCB board (6) to start normally or work normally in a low temperature environment.

PREPARATION METHOD FOR GERMANIUM-BASED SCHOTTKY JUNCTION

A preparation method for a germanium-based schottky junction, comprising: cleaning the surface of an N-type germanium-based substrate (1); depositing a layer of CeO2 (2) on the surface thereof; and then depositing a layer of metal (3) thereon. Rare earth vapour CeO2 is in contact with a germanium substrate, so that a stable Ce-O-Ge bond can be formed at an interface, which is beneficial for reducing the interface state density, improving the quality of the interface, reducing the MIGS, and suppressing Fermi-level pinning. Meanwhile, the tunnelling resistance introduced by the CeO2 between the metal and the germanium substrate is lower than the tunnelling resistance introduced by Si3N4, Al2O3, Ge3N4 and the like. In view of the good interfacial characteristic and small conduction band offset to the germanium substrate, the insertion of a CeO2 dielectric layer is suitable for preparing the germanium-based schottky junction with low resistivity.

INDUCTANCE CURRENT DIFFERENTIAL FEEDBACK-BASED VIRTUAL SYNCHRONOUS MACHINE STRONG POWER GRID STABILITY CONTROL METHOD

Disclosed is an inductance current differential feedback-based virtual synchronous machine strong power grid stability control method, which belongs to the fields of distributed power generation inverter control and power electronic technology. a grid-connected topological structure of a virtual synchronous machine applying said control method comprises a direct current-side voltage source, a three-phase inverter, a three-phase circuit impedance and a three-phase power grid. By means of virtual synchronous machine control and inductance current differential feedback control, and under the premise of not adding real inductance, not increasing filter costs, an not adding on a grid-side current sensor, virtual synchronous machine output power oscillation under a strong power grid are suppressed, and stable operation of an inner loop-free virtual synchronous machine under the strong power grid is implemented.

Motor bearing fault diagnosis method and system based on DQ conversion

The invention provides a motor bearing fault diagnosis method and system based on DQ conversion, and relates to the technical field of motor fault diagnosis, and the method comprises the steps: carrying out the preprocessing of a three-phase current signal of a motor stator of a motor, obtaining a three-phase current, carrying out the Park conversion, converting the three-phase current into a d and q coordinate system, after a Park vector modulus is obtained through calculation, Fourier transform is carried out, and the amplitude at the BPFI position, the amplitude at the BPFO position, the amplitude at the FTF position and the amplitude at the BSF position are combined, so that the amplitude of the Park vector modulus is obtained; an outer ring fault severity grade, an inner ring fault severity grade, a rolling body fault severity grade and a retainer fault severity grade are obtained through analysis and serve as bearing fault diagnosis results of the bearing in the target motor, and ...

Woody plant carbon sequestration evaluation method based on leaf functional character coupling

The invention discloses a woody plant carbon sequestration evaluation method based on leaf functional character coupling, which comprises the following steps: selecting fresh leaves of various woody plants within preset time; measuring a leaf structural character index, a leaf physiological character index and a leaf chemical character index of each fresh leaf; measuring the net photosynthetic rate of each fresh leaf at a plurality of moments, and determining the daily net photosynthetic carbon sequestration amount corresponding to each fresh leaf based on the net photosynthetic rate; measuring the daily carbon solid stock corresponding to each kind of fresh leaves; and in combination with the daily net photosynthetic carbon sequestration amount and the daily carbon sequestration amount, respectively carrying out statistical analysis on the leaf structural character index, the leaf physiological character index and the leaf chemical character index to obtain the influence of various leaf ...

DEGRADABLE ARTIFICIAL BONE MATERIAL PREPARATION METHOD BY USING NATURAL MAGNESIUM-CONTAINING CALCITE

Disclosed is a method for preparing a degradable artificial bone material by using natural magnesium-containing calcite. In the method, a magnesium-containing calcite material, shell skeleton of starfish and/or sea urchin, is used as a raw material to prepare a degradable artificial bone material, such as a beta-phase tricalcium phosphate artificial bone material, a two-phase calcium phosphate material or a mixture of beta-phase tricalcium phosphate and calcite, through a hydrothermal synthesis reaction, wherein some artificial bone materials keep the original interconnected porous structure of the shell of starfish and sea urchin.

IMAGE ACQUISITION SYSTEM, IMAGE ACQUISITION PROCESSING SYSTEM, AND IMAGE ACQUISITION PROCESSING METHOD

Provided in an embodiment of the invention are an image acquisition system, an image acquisition processing system, and an image acquisition processing method. The image acquisition system (100) comprises an image capturing device (130) and a polarization device (152). The image capturing device (130) is used to capture a first image and a second image of a target scene. When the image capturing device (130) captures the second image, the polarization device (152) is positioned in an incident optical path of the image capturing device (130) corresponding to the second image so that a first incident light beam (110) for forming the first image and a second incident light beam (120) for forming the second image have different polarization states. The embodiment of the invention can reduce a volume of information associated with image processing and enhance image processing accuracy.

Sunshade curtain device capable of being opened and closed in positioning mode

The invention discloses a sunshade curtain device capable of being opened and closed in a positioned mode, and relates to the technical field of sunshade curtains, the sunshade curtain device comprises a curtain body, a first fixing corner bracket, an arc-shaped rod and a first signal receiver, one side of the curtain body is fixedly connected with a curtain face unfolding mechanism, and the other end of the curtain body is fixedly provided with a curtain face closing mechanism. A T-shaped rod is pulled through a hydraulic cylinder, so that the T-shaped rod is close to the outer surface of a window shade roll, meanwhile, a third motor is started, power is injected into a belt transmission system, and a driven belt wheel in the belt transmission system drives second rolling columns on the two sides to roll on the outer surface of the window shade roll so as to smoothen the middle of a window shade. And after the completely rolled window shade is in contact with the first pin roller, the ...

Deformation detection method for aluminum anode rod based on machine vision

The invention discloses a machine vision-based aluminum anode guide rod deformation detection method, which comprises the following steps: acquiring an image of an anode guide rod to be detected, the image being an RGB color image; preprocessing the image to obtain a preprocessed image; converting the preprocessed image into a grayscale image; performing contour processing on the grayscale image to obtain a contour image of the anode guide rod; carrying out binarization processing on the contour image to obtain a binarized image; calculating an actual measurement area of the anode guide rod according to the binary image; the actual measurement area is compared with a standard area, the direction and the number of deformation pixel points exceeding the standard area are obtained, and the standard area is an image area obtained by conducting image processing on a standard anode guide rod; and judging the deformation degree of the anode guide rod according to the deformation pixel points.

TRANSIENT AND DIRECT-CURRENT SYNCHRONOUS TRIGGER TYPE POWER CLAMP ESD PROTECTION CIRCUIT

A transient and direct-current synchronous trigger type power clamp ESD protection circuit. The ESD protection circuit comprises： a transient trigger module, a direct-current voltage trigger module and a discharge device, wherein the transient trigger module is respectively connected to the direct-current voltage trigger module and the discharge device. When an ESD impact is approaching, the ESD protection circuit can be turned on better and faster, and can effectively avoid the problems of erroneous triggering and latching up caused by quick power-on and high-frequency noise at the same time.

Explosion-proof hydrogen storage and hydrogenation pry

The explosion-proof hydrogen storage and hydrogenation pry comprises a shell, a partition plate, a hydrogen storage module, a compression assembly, a hydrogenation assembly and a detection control module, the partition plate is arranged in the shell to divide the shell into at least a first cavity and a second cavity, and a ventilation system communicating with the first cavity and the second cavity is arranged on the shell; the hydrogen storage module and the compression assembly are arranged in the first cavity and the second cavity respectively, the hydrogen storage module is communicated with the hydrogen production equipment, the compression assembly is communicated with the hydrogen storage module, the hydrogenation assembly is arranged outside the shell, the hydrogen storage module is communicated with the hydrogenation assembly, and the detection control module is arranged in the shell. The detection control module is connected with the hydrogen storage module so as to detect pressure ...

Coal-biomass coupling power generation fuel control method and device

The invention discloses a coal-biomass coupling power generation fuel control method and device. The method comprises the steps that the coal combustion amount B is obtained; the fire coal amount B is linearly adjusted to be first feed water flow, and third-order inertia adjustment is conducted on the first feed water flow to obtain first output amount; the biomass fuel quantity Bs is linearly adjusted into second feed water flow, and the second feed water flow is subjected to third-order inertia adjustment and then subjected to amplitude limiting adjustment to obtain second output quantity; the separator outlet temperature T and the temperature set value Tsp in the generator set are input into the PID controller for PID adjustment to obtain a third output quantity, the first output quantity to the third output quantity are accumulated to judge whether the minimum feed water flow limit value is exceeded or not, if yes, the accumulated value is output as the final feed water flow set value ...

BROWSER COMPATIBILITY METHOD AND BROWSER

A browser compatibility method and a browser are disclosed. The method comprises: the script file of a target webpage is loaded on the basis of URL information of an access request; if the target syntactic information in the script file exists in a preset rule library, the target syntactic information is replaced by the syntactic information corresponding to the target syntactic information under the current browser kernel engine, and a new script file is generated; wherein, the mapping relationship among the syntactic information under the different kernel engines is recorded in the preset rule library; and after the new script file being parsed and rendered, the target webpage is displayed.

Method and device for Raman analysis of polysaccharide and application of method and device

The invention discloses a method and a device for Raman analysis of polysaccharide and application of the method. The method comprises the following steps: (1) carrying out high-resolution spatial scanning on the polysaccharide by adopting probe coupling Raman to obtain a Raman spectrum of the polysaccharide; (2) analyzing a stretching vibration characteristic peak of a chemical bond of the Raman spectrum so as to preliminarily determine monosaccharide molecular formulas of polysaccharide in different spatial positions; (3) analyzing a non-stretching vibration characteristic peak of a functional group of the Raman spectrum so as to accurately determine monosaccharide molecular formulas and monosaccharide molecular configurations of the polysaccharide in different spatial positions; and (4) determining the arrangement sequence of monosaccharide molecules in the polysaccharide on the basis of monosaccharide molecular formulas and monosaccharide molecular configurations of the polysaccharide ...

Spectrum leakage elimination method and system

The invention discloses a spectrum leakage elimination method and system, and belongs to the technical field of signal processing and new energy power generation, and the elimination method provided by the invention comprises the steps: harmonic injection and sampling, fast Fourier transform, proportional harmonic average calculation of compensation amount, and calculation of positive sequence output impedance and negative sequence output impedance of integer frequency at an injection position. According to the elimination method, based on the principle of spectrum leakage, the influence of spectrum leakage caused by non-full-period sampling on the impedance measurement value at the sweep frequency harmonic injection frequency during power grid frequency fluctuation can be eliminated only through simple proportional harmonic average calculation. According to the method, the required calculation amount is small, and the effectiveness of the method is verified through a frequency sweeping ...

FALSE-TRIGGER-PROOF POWER SUPPLY CLAMPING ESD PROTECTION CIRCUIT

A false-trigger-proof power supply clamping ESD protection circuit, comprising: an ESD impact detection component, a discharge transistor, a discharge transistor activation access, and a discharge transistor deactivation access. The circuit, in a smaller layout area, has very strong static-discharge capability under ESD impact, little power leakage during normal power-on, and relatively strong false-triggering immunity capability for quick power-up.

CONFIGURABLE PROCESSOR ARCHITECTURE AND CONTROLLING METHOD

A configurable processor architecture, includes a configurable controlling component and a configurable component which connect to each other. The configurable controlling component is used for executing instructions to send the configuration information to the configurable component, and the configurable component is used for performing a process task according to the configuration information. A controlling method for the configurable processor includes the following steps: the configurable controlling component sending the configuration information to the configurable component, and the configurable component performing the corresponding operation according to the configuration information.

CMOS DEVICE FOR REDUCING CHARGE SHARING EFFECT AND PREPARATION METHOD THEREFOR

Provided are a CMOS device for reducing the charge sharing effect and a preparation method therefor. The CMOS device includes a substrate (1), an isolation area (4), an active area (5), a gate area (6), an LDD area (7), a gate sidewall (8), a source and drain area (9) and an additional isolation area (3) for capturing carriers provided immediately beneath the isolation area (4). The material of the additional isolation area is porous silicon. The CMOS device can reduce the charge sharing effect caused by heavy ions and can improve the anti-irradiation performance of the integrated circuit with a simple manufacturing process.

SURFACE TREATMENT METHOD FOR GERMANIUM-BASED PART

Disclosed is a use of ammonium fluoride aqueous solution as a passivator of germanium-based surface, wherein the concentration of ammonium fluoride is 20-55 wt%. Also disclosed is a pretreatment method for germanium-based surface. The method comprises: 1) providing a semiconductor germanium-based substrate as a substrate; 2) cleaning the substrate; 3) removing the oxidation layer on the surface; 4) treating the surface of the substrate with ammonium fluoride aqueous solution, wherein the concentration of ammonium fluoride in the ammonium fluoride aqueous solution is 20-55 wt%, treating time is 5-35min, and the treatment is carried out in atmosphere.

PROBE AND DEVICE FOR MONITORING IMMINENT EARTHQUAKE

A probe for monitoring an imminent earthquake, comprising: a soniferous head (10) used for directly coupling to a point to be detected; a plurality of groups of sensors (30) used for converting earthquake sound signals into electrical signals; a preprocessing circuit module (50) used for conducting signal filtering, amplification and analogue-to-digital conversion on the electrical signals in sequence; and a power supply and signal cable (60) used for transmitting output signals of the preprocessing circuit module (50) and providing a power supply for the preprocessing circuit module (50), wherein the power supply output end and the signal input end of the power supply and signal cable (60), and the plurality of groups of sensors (30) and the preprocessing circuit module (50) are packaged through a packaging structure (40 ) and fixed at the output end of the soniferous head (10). Since a frequency response range of sensor groups covers sound wave frequency bands of different earthquake ...

IMMINENT EARTHQUAKE MONITORING METHOD FOR GREAT EARTHQUAKE

A imminent earthquake monitoring system for great earthquake is used to solve the practical problem of laying out imminent earthquake monitoring points for grate earthquake with low cost and high density. The system comprises at least one monitoring unit and at least one monitoring center. Each monitoring unit is constructed by a sensing unit and a processing unit. The sensing unit is capable of at least sensing earthquake sound and ground stress change. The processing unit performs pre-processing on a sensing signal or data received from the sensing unit, and sends the signal or data to the monitoring center. One monitoring center is responsible for receiving data sent from multiple monitoring units of an area, and performing analytical processing. Multiple monitoring centers being connected may cover a larger area. The monitoring unit is mounted as a foundation pile of a building. The system has characteristics of low cost, easy mounting, and flexible networking, and is suitable for dense ...

CMOS DEVICE CAPABLE OF REDUCING CHARGE COLLECTION COLLECTED BY RADIATION AND PREPARATION METHOD THEREOF

The invention discloses a CMOS device capable of reducing charge collection generated by radiation and preparation method thereof. The CMOS device provided by the invention is provided with a heavily doped charge restriction collecting region vertically below a source region and a drain region, the doping type of the charge restriction collecting region is opposite to those of the source region and the drain region, and the doping concentration is greater than or equal to those of the source region and the drain source. The transverse range of the charge restriction collecting region is slightly less than or equal to those of the source region and the drain region, and the transverse position of a channel is not more than the edges of the source region and the drain region. The CMOS device provided by the invention can greatly decrease the 'hopper' range generated under the action of single particle so that the instantaneously collected charge can be decreased under the action of the electric ...

LIQUID CRYSTAL COMPOUND

Disclosed is a liquid crystal compound. The compound has a general structural formula as shown by formula I. Such a compound has good thermal and UV stability, large positive dielectric anisotropy △ε, and can achieve a low threshold voltage during the use of optics, thereby having great significance to the fast response of display devices, and therefore being very suitable for formulating a liquid crystal mixture. A liquid crystal mixture containing such a liquid crystal unit can be applied to various display devices, and is especially suitable for TN-TFT and STN display devices, but can also be used in IPS and VA display devices.

Amino cyclic compound, organic electroluminescent material, and organic electroluminescent device

The invention belongs to the technical field of electroluminescent device materials, and particularly relates to a specifically arranged amino cyclic compound with triplet state stable groups, and an organic electroluminescent material and an organic electroluminescent device containing the amino cyclic compound. The structure of the amino compound disclosed by the invention is shown as a formula P. The amino cyclic compound according to the present invention, after being used in an organic electroluminescent device, results in it exhibiting a variety of improved properties in terms of efficiency, operating voltage, lifetime, color coordinates and/or color purity, i.e., width of the emission band. In addition, the compound also has better solubility, can be processed in a very simple manner, and has better thermal stability than existing materials. Meanwhile, due to the low molecular weight, the compound has the lower sublimation temperature, and large-scale production is easier.

Membrane-method defluorination filtering equipment for water quality purification

The invention relates to the technical field of fluorine removal, and discloses membrane-method fluorine removal filtering equipment for water purification, which comprises an equipment base, a transmission assembly is fixedly assembled on the top of the equipment base, a fixing assembly is fixedly assembled on the top of the equipment base, and a first fluorine removal assembly and a second fluorine removal assembly are fixedly assembled on the inner wall of the fixing assembly. A cleaning assembly is fixedly assembled on the top of the equipment base, and a detection fixing base is fixedly assembled on the outer edge of the first fluorine removal assembly. The liquid is conveyed to the first defluorination pipe membrane through the parallel connection pipe I by utilizing the conveying assembly; liquid is subjected to first-time fluorine removal operation through the first fluorine removal pipe membrane and conveyed to an inner cavity of the second fluorine removal pipe membrane through ...

STRUCTURE AND METHOD FOR TESTING GATE OXIDE LAYER INTERFACE TRAP DENSITY

The present invention relates to the field of MOS device quality and reliability research. A structure and method for testing gate oxide layer interface trap density, the method enabling the gate oxide layer interface trap density test of n-type and p-type MOS devices to be completed on the same test structure, thus not only reducing the test time by half, but also reducing the cost of test instrument of conventional methods because the present test method is based on a simple current-voltage scanning test without using devices such as pulse generator and the like; the obtained test result having spectral peak characteristics also facilitates data analysis and computation; the test structure is a four-ended structure, and can simultaneously complete two tests, being equivalent to reducing the layout size of the test structure, thus reducing test cost, and satisfying the requirement for cost control due to the rapid increase of manufacturing cost under an advanced process node.

SEMICONDUCTOR SUBSTRATE AND METHOD FOR FABRICATING THE SAME

A semiconductor substrate and a method for fabricating the same are provided. The method comprises: forming a porous layer (2) on a semiconductor base sheet (1), arranging a semiconductor Ge layer (3-1) on the porous layer, with a passivation layer (4) between the semiconductor Ge layer and the porous layer, so as to form a semiconductor Ge-on-porous layer based substrate. By utilizing the low dielectric constant of the porous layer, coupling effect that the drain side acts on the channel potential via a buried layer is effectively reduced, thereby, drain induction barrier lower effect is effectively inhibited, and parasitic capacitance between the source/drain and the substrate can be reduced, so as to improve speed characteristic of devices.

Cylindrical FPSO upper module structural strength checking method based on SACS

The invention discloses a cylindrical FPSO upper module structural strength checking method based on SACS, and relates to the technical field of offshore oil engineering. Comprising a cylindrical FPSO upper module, a wave wall and a ship body main deck, the cylindrical FPSO upper module comprises a cylindrical FPSO module two-layer deck, a cylindrical FPSO module process deck and a cylindrical FPSO module leg column, and the method comprises the following steps that firstly, according to an SACS software model element numbering rule and a model simulation method, an SACS software model element numbering rule is established; the number of the cylindrical FPSO upper modules is combined, and the cylindrical FPSO upper modules are named. According to the method, the mutual influence between the modules on the upper portion and between the modules and the wave wall due to the fact that the process deck is an integral deck can be directly counted, calculation simulation of the modules on the ...

Amorphous zinc phosphate nano hybrid material, preparation method thereof and application of amorphous zinc phosphate nano hybrid material in promoting angiogenesis

The invention provides a preparation method of an amorphous zinc phosphate nano hybrid material, which comprises the following steps: (1) solution preparation: respectively dissolving zinc inorganic salt and phosphate in an aqueous solution containing a polyanion type high-molecular polymer to respectively obtain a solution A and a solution B; (2) wet chemical precipitation: mixing the solution A and the solution B, and carrying out wet chemical synthesis reaction to obtain emulsion; and (3) cleaning and drying: centrifugally separating the emulsion to obtain a precipitate, and dialyzing, cleaning and drying the precipitate to obtain the amorphous zinc phosphate nano hybrid material. The invention also provides application of the material in promoting cell proliferation and cell transfer and promoting angiogenesis. The amorphous zinc phosphate nano hybrid material disclosed by the invention has a relatively small particle size, is beneficial to rapid degradation and metabolism in vivo and ...

Melting, dipping, extruding and pulling device for long glass fiber reinforced thermoplastic material

The invention discloses a long glass fiber reinforced thermoplastic material melting, dipping, extruding and pulling device. A top extruding and pulling linkage die head and a bottom extruding and pulling linkage die head are synchronously and reversely driven through a driving device; the inner cavity of the top layer mechanism and the inner cavity of the bottom layer structure are each provided with a bevel angle and a synchronous extruding and pulling groove, the working gaps between the top layer mechanism and the top extruding and pulling linkage die head and the working gaps between the bottom layer mechanism and the bottom layer mechanism are controlled through the bevel angles and the synchronous extruding and pulling grooves correspondingly, and fiber and reinforced thermoplastic materials are subjected to dipping extruding and pulling and dispersed driving through the devices. Meanwhile, through the optimal design of the runner structure and the auxiliary heating device, the impregnation ...

Step regression primary frequency modulation control method and system

The invention discloses a cascade regression primary frequency modulation control method and system, and the method comprises the steps: obtaining a primary frequency modulation power theoretical value, and setting a regression coefficient; recording the maximum frequency modulation component of the current frequency modulation action process; when the frequency is in a low-frequency stage, performing frequency modulation again from the maximum frequency modulation component regression stage, taking k * Q as a regression step length, and satisfying the condition that (1-n * k) * Q is less than or equal to Nlt; if (1-(n-1) * k) * Q, the real-time primary frequency modulation component of the actual unit is (1-(n-1) * k) * Q; when the frequency is in a high-frequency stage, frequency modulation is carried out again from the maximum frequency modulation component regression stage, the step length is regressed by k * Q, and (1-n * k) * Q is larger than or equal to Ngt; if (1-(n-1) * k) * Q, ...

Chemical reagent delivery system

The invention relates to a chemical reagent conveying system, and belongs to the technical field of chemistry, the chemical reagent conveying system comprises a storage tank, a liquid pipeline, a pump body and an alarm device, the storage tank is used for containing a chemical reagent; one end of the liquid pipeline is connected to the storage tank, and the other end of the liquid pipeline extends to the liquid using area; the pump body is mounted on the liquid pipeline and is used for conveying a chemical reagent to a liquid using area; at least part of the liquid pipeline is sleeved with a sleeve; the alarm device is installed in the sleeve and gives an alarm after making contact with the chemical reagent. According to the chemical reagent conveying system, after the chemical reagent leaks out of the liquid pipeline in the sleeve, the leaked chemical reagent can be collected in the sleeve, the possibility that the chemical reagent leaks to the outside is reduced, and then the possibility ...

Water-soluble composite adjuvant for inactivated vaccine against porcine epidemic diarrhea and application of water-soluble composite adjuvant

The invention discloses a water-soluble composite adjuvant for a porcine epidemic diarrhea inactivated vaccine. The adjuvant comprises polyacrylic acid, astragalus polysaccharide, PVL-S protein, squalene, Span 85 and Tween 80. The adjuvant is prepared from the following substances in percentage by mass: 2.85% of polyacrylic acid, 23.75 mu g/ml of astragalus polysaccharide, 9.5 mu g/ml of PVL-S protein, 1.67% of squalene, 1.67% of span 85 and 1.67% of Tween 80. The preparation method of the water-soluble composite adjuvant is simple to operate, does not need a complex process and excessive instruments, and is easy for large-scale production; the preparation raw materials are easy to obtain, the toxic and side effects are small, and the biocompatibility is good; the water-soluble composite adjuvant prepared by the invention has good safety and effectiveness, and is suitable for large-scale use in porcine epidemic diarrhea inactivated vaccines.

Predatory mite spraying device

The invention discloses a predatory mite spraying device. The device comprises a back type frame; the bandage is connected to the back type frame; the feeding box body is installed on the back type frame, and a feeding port is formed in one side of the upper end face of the feeding box body and used for pouring predatory mite products into the feeding box body; the guiding and conveying pipe is arranged below the feeding box body; the vibration pipe material dispersing assembly is connected to the guide conveying pipe and used for conducting material vibration and shaking conveying on the conveyed predatory mite products; and the spray pipe adjusting device is mounted at the end part of the vibration pipe material dispersing assembly.

Diagnostic device and method for plasma equipment

The invention provides a diagnosis device and method for plasma equipment, and the device comprises a serial port receiving and transmitting circuit, a first conversion circuit, a single-chip microcomputer control circuit, a second conversion circuit, an Ethernet receiving and transmitting circuit, and a power module, the serial port receiving and transmitting circuit is connected with the plasma equipment and the first conversion circuit, and the first conversion circuit is connected with the Ethernet receiving and transmitting circuit. The first conversion circuit is connected with the single-chip microcomputer control circuit, the single-chip microcomputer control circuit is connected with the second conversion circuit and the power supply module, the second conversion circuit is connected with the Ethernet transceiver circuit, the Ethernet transceiver circuit is connected with the server, and the device collects plasma characteristic parameters and sequentially carries out decoding, ...

Service scheduling method and device, electronic equipment and computer readable storage medium

The invention provides a service scheduling method and device, electronic equipment and a computer readable storage medium, the service scheduling method is applied to a management and control node in a cloud edge computing network, and the cloud edge computing network further comprises a plurality of edge computing nodes. Comprising the following steps: acquiring network state information, service type information and service scheduling request times uploaded by each edge computing node in a cloud edge computing network; determining an activation utility value of each edge computing node according to network state information, service type information and service scheduling request times uploaded by each edge computing node in the cloud edge computing network; determining a candidate service scheduling node in each edge computing node according to the activation utility value; and activating a service scheduling module of the candidate service scheduling node, and taking the candidate ...

MULTI-BIT DELTA-SIGMA MODULATOR

Disclosed is a multi-bit delta-sigma modulator, which comprises an analog filter, an analog adder, a multi-bit quantizer, a digital loop filter, a multi-bit feedback digital-analog converter and a shunt feedback module. The shunt feedback module comprises at least a high-order multi-bit shunt feedback branch, and each shunt feedback branch comprises a shunt feedback digital-analog converter, a signal shunt unit and an analog adder in the analog filter. By introducing the high-order multi-bit shunt feedback branch, the modulator can reduce the element mismatching noise of the multi-bit shunt feedback digital-analog converter, weaken analog-digital mismatching noise, and reduce the power consumption of the analog filter. The disclosed modulator may be applied to a high-performance analog-digital converter.

ANTI-SINGLE-PARTICLE RADIATION MULTI-GRID DEVICE AND PREPARATION METHOD THEREFOR

Provided are an anti-single-particle radiation multi-grid device and a preparation method therefor. The multi-grid device comprises: a substrate (1); a source region (6) and a drain region (7) which are arranged on the substrate (1) and respectively located at two ends; a protruding fin-shaped structure (8) and a dielectric layer (9) between the source region (6) and the drain region (7) which are on the substrate (1); a gate dielectric (10) and a gate electrode (11) which are arranged on the fin-shaped structure (8) and the dielectric layer (9) ; and two layers of isolation layers (4) separated from each other, which are arranged in a drain region between two adjacent fins, a sandwich (5) being formed between the two layers of isolation layers (4). The sandwich (5) is contrary to the substrate (1) in doping types and forms a shunting pn junction together with the substrate (1); moreover, the electrode of the shunting pn junction is not connected to the drain electrode. In this way, some ...

METHOD AND DEVICE FOR CONFIGURING REFERENCE SIGNAL, BASE STATION AND USER EQUIPMENT

Disclosed is a method for configuring a reference signal. The method comprises: when a network side determines that uplink air-interface resources are insufficient, the network side sends a downlink reference signal to a user equipment, instructs the user equipment to measure according to the downlink reference signal, and instructs the user equipment to cancel or to reduce sending of uplink reference signals. Also disclosed are a device for implementing the method and a base station.

Oil delivery pump unit FMECA analysis method based on D-S evidence theory

The invention discloses an FMECA analysis method for an oil delivery pump unit based on a D-S evidence theory, which is applied to the technical field of risk assessment and operation reliability analysis and comprises the following steps: constructing an FMEA analysis table; performing risk factor assessment based on the interval value; performing multi-representation combination on the risk factor evaluation result; determining a reliability function and a likelihood function of each fault mode of the oil delivery pump unit, and determining a fault mode risk priority sequence; carrying out fault mode screening with the same sorting level and the same RPN value based on the fault mode risk priority sorting, and carrying out sorting updating on a screening result; and obtaining a risk degree weight value and a safety level sequence of the fault mode of the oil delivery pump unit. The technical problems that in the prior art, analysis limitation exists in fault mode analysis of oil delivery ...

CHANNEL STRESS INDUCING METHOD AND FET MANUFACTURED THEREOF

A channel stress inducing method and an FET manufactured thereof relate to a CMOS ultra large scale integrated circuit. A strain dielectric layer (20) is interposed between a source/drain region (15, 16) and a substrate (14) of the FET. The strain dielectric layer (20) which contacts the substrate (14) directly induces the channel to occur strain. Therefore, the mobility of carriers of the channel and performance of the FET are improved. The strain dielectric layer (20) which has tensile strain induces the channel to occur tensile strain, and the mobility of electrons is increased. The strain dielectric layer (20) which has compression strain induces the channel to occur compression strain, and the mobility of holes is increased. Therefore, the effect of induced channel stress is ensured. The device structure of the FET is improved. And the restrain capacity of short channel effect of device is enhanced.

Urban road tunnel multifunctional traffic isolation fence setting system

The invention relates to an urban road tunnel multifunctional traffic isolation fence setting system which comprises a first column of isolation fences and a second column of isolation fences, the first column of isolation fences are arranged between a motor vehicle lane and a non-motor vehicle lane, and the second column of isolation fences are arranged between the non-motor vehicle lane and a sidewalk. The face, facing the motor vehicle lane, of the first column of isolation fence is an A-face isolation fence, the face, facing the non-motor vehicle lane, of the first column of isolation fence is a B-face isolation fence, the face, facing the non-motor vehicle lane, of the second column of isolation fence is a C-face isolation fence, and the face, facing the sidewalk, of the second column of isolation fence is a D-face isolation fence. According to the invention, the exclusive right of road of motor vehicles, non-motor vehicles and pedestrians in the tunnel is ensured, so that the urban ...

CREDIT RISK ASSESSMENT METHOD AND DEVICE BASED ON TEXT ANALYSIS, AND STORAGE MEDIUM

A credit risk assessment method and device based on text analysis, and a storage medium. The method also comprises: acquiring a text of a borrower (S101); analyzing the text to obtain a basic language characteristic, the basic language characteristic being used for analyzing whether the borrower will break a contract (S102); inputting the basic language characteristic into a preset credit risk assessment model to obtain a risk value of the borrower outputted from the credit risk assessment model (S103); and outputting the risk value of the borrower (S104).

A GERMANIUM-BASED NMOS DEVICE AND A MANUFACTURING METHOD THEREOF

The invention provides a germanium-based NMOS transistor which includes a GeO2 layer (7) and a metallic oxide layer deposited between a substrate (1) and a source region as well as between the substrate (1) and a drain region. That is, a layer of GeO2 deposited on the substrate (1), a layer of metallic oxide deposited on the GeO2 layer (7) and the metallic source/drain regions located on the metallic oxide layer. The invention also provides a manufacturing method for a germanium-based NMOS transistor. The barrier height of electronics at the source/drain regions is reduced, the current switching ratio is improved, the performances of the transistor are strengthened and the manufacturing method is compatible with a silicon CMOS technology completely, while the strengths of the simple method are kept.

Traffic safety improving system for multi-lane sun glare area

The invention relates to a multi-lane sun glare area traffic safety improving system which comprises a main trunk road and an exit ramp arranged on the side face of the main trunk road, an exit triangular area is formed between the main trunk road and the exit ramp, and guardrails are arranged on the two sides of the main trunk road and the exit ramp. The system further comprises a sign information guiding system, a guiding facility system, an anti-dazzle cursor line system and a road sign guiding system. The sign information guiding system comprises a curved-surface-shaped fluorescent board and a combined traffic information sign; the curved-surface-shaped fluorescent boards are arranged on guardrails on the two sides before entering an exit ramp, and the combined traffic information signs are arranged on the outer sides of guardrails of an exit triangular area. According to the invention, the significance of the induction facility in a sun glare environment is improved, the visibility ...

AUGMENTED-REALITY GLASSES

Augmented-reality glasses comprise a glasses body (100) and an optical assembly (200). The optical assembly (200) is connected to the glasses body (100), and is disposed on the outer side of the glasses body (100). At least one end of the optical assembly (200) is rotatably connected to any lens leg of the glasses body (100). The optical assembly (200) rotates relative to the corresponding lens leg in a damped manner. By means of the augmented-reality glasses, the vertical position of the optical assembly (200) in front of the eyes can be conveniently adjusted in a rotation range, and accordingly, augmented-reality images and human eye sights are accurately matched to obtain good augmented-reality experience.

SYSTEM FOR MONITORING IMMINENT EARTHQUAKE AND INSTALLATION METHOD THEREFOR

A system for monitoring an imminent earthquake, comprising: a plurality of groups of sensor arrays (50) used for detecting sound wave frequency bands of different earthquake sounds; a signal processing module (40) used for conducting signal filtering, amplification and analogue-to-digital conversion on output signals of the plurality of groups of sensor arrays (50); and a signal transmission module (30) which comprises a cable (301) used for transmitting output signals of the signal processing module (40), a main control module (20) used for receiving the signals transmitted by the cable (301), and a power supply management module (10) used for supplying power for the signal processing module (40), the signal transmission module (30) and the main control module (20). Since a frequency response range of the plurality of groups of sensor arrays (50) covers sound wave frequency bands of different earthquake sounds, the system for monitoring an imminent earthquake can capture the intensity, ...

PROCESSING METHOD FOR GATE DIELECTRIC DEPOSITED ON GE-BASED OR III-V GROUP COMPOUND BASED SUBSTRATE

A processing method for gate dielectric deposited on a Ge-based or III-V compound based substrate is provided. The method comprises: depositing a high-k gate dielectric (2) on the Ge-based or III-V group compound based substrate (1), performing F plasma processing to the high-k gate dielectric (2) and applying introducing electric field during the processing, wherein, the electric field makes F ion energy attain 5-50eV when the ion is accelerated and arrives at the surface of the gate dielectric, and F ion drifts into the gate dielectric, the density ratio in the high-k dielectric (2) of F ion to O atom being 0.01-0.15:1. The method improves the quality of the gate dielectric and the passivation fault efficiency, reduces the interface state density, and improves the performance of the Ge based or III-V group compound based MOS device.

Multi-character breeding value determination method, device and equipment and storage medium

The invention discloses a multi-character breeding value measuring method, device and equipment and a storage medium, multi-character breeding parameters are obtained, the multi-character breeding parameters comprise phenotype file parameters, pedigree file parameters and genome file parameters corresponding to various shapes, the Kronecker theorem is utilized, and according to a preset equivalence model of a BLUP algorithm, the multi-character breeding value is measured. Decomposing the multi-trait breeding parameters to extract a Kronecker component corresponding to each trait so as to decompose a multi-trait determination process into a plurality of single-trait determination processes, thereby reducing the memory consumption in the multi-trait determination process; the method comprises the following steps: acquiring a plurality of Kronecker components, performing single-character measurement on each Kronecker component to obtain a first breeding value corresponding to each Kronecker ...

Multi-granularity and multi-level computing power scheduling method in end-side computing power network

The invention discloses a multi-granularity and multi-level computing power scheduling method in an end-side computing power network. The method comprises the following steps: deploying an online deep reinforcement learning agent and a system state monitoring module at a base station side; detecting and collecting channel states and computing resources, and sending the channel states and the computing resources to the deep reinforcement learning agent; outputting a task segmentation strategy of each user and a scheduling decision of each subtask; the task type device TD divides the task of the task type device TD according to the instruction and dispatches the task to the target computing node in parallel according to the instruction for parallel processing; the task type device TD receives calculation results of all the subtasks which are dispatched in parallel; according to the scheduling method, the task of each user is subjected to multi-granularity segmentation according to current ...

Data center energy-saving regulation and control method and system based on AI optimization

The invention relates to a data center energy-saving regulation and control method and system based on AI optimization, and the method comprises the steps: obtaining the current operation data of all data center loads in an integrated management region in real time, calculating the associated PUE energy consumption factor of the integrated management region under the current operation condition according to the current operation data, and calculating the PUE energy consumption factor of the integrated management region according to the PUE energy consumption factor. The method comprises the steps of obtaining an energy consumption factor association relationship of all data center loads, performing optimization adjustment on optimal operation parameters of each data center load according to the energy consumption factor association relationship, generating an energy-saving optimization strategy of the data center, and performing energy transfer optimization processing on the data center ...

Tubular reactor for synthesizing p-tert-butyltoluene and synthesis method of p-tert-butyltoluene

The invention relates to the field of chemical synthesis, in particular to a tubular reactor for synthesizing p-tert-butyltoluene and a synthesis method thereof.The tubular reactor comprises a supporting frame, a reaction kettle and a fixing plate are fixedly installed on the supporting frame, and a storage tank is further fixed to the supporting frame; the water tank is fixed on the support frame, the water tank is communicated with a spiral guide pipe which penetrates through the reaction kettle and is spirally arranged in the reaction kettle, and a water pump is fixed on the support frame; the U-shaped pipe is arranged in the reaction kettle, a driving assembly connected with the U-shaped pipe is arranged on the fixing plate, and the driving assembly is used for driving the U-shaped pipe to rotate so as to enable the U-shaped pipe to perform primary mixing action on a solution in the U-shaped pipe; the reciprocating mechanism is arranged in the reaction kettle and is connected with the ...

METHOD FOR EXTRACTING TIME CONSTANT OF GATE DIELECTRIC LAYER TRAP OF SEMICONDUCTOR DEVICE

The present invention relates to the field of microelectronic device reliability. Disclosed is a method for extracting a time constant of a gate dielectric layer trap of a semiconductor device. The method comprises: first initializing a state of a trap in a semiconductor device, to make a final state of the trap be an empty state; then applying a DC signal or an AC signal on a gate terminal, a drain terminal being at zero bias Vd1, respectively applying a small voltage vg2 and vd2 on the gate terminal and the drain terminal after duration t1, and detecting a state of a drain terminal current Id; modifying the duration t1 to be t2=t1+∆t, repeating the last step without changing other conditions, and so on, and performing measurement N times, to obtain t1, t1+∆t…t1+(N-1)∆t, and states of the drain terminal current corresponding to N time points; afterwards, performing moving average and calculation, to obtain an occupation probabilities P corresponding to (N-n) time points; and performing ...

GERMANIUM-BASED NMOS DEVICE AND PREPARATION METHOD THEREFOR

The present invention relates to the technical field of ultra large scale integration (ULSI) circuit manufacturing. Embodiments of the present invention provide a germanium-based NMOS device and a preparation method therefor. Two insulating dielectric layers are inserted between metal source and drain and a substrate of the germanium-based NMOS device. The bottom insulating dielectric layer adopts a dielectric material with a high pinning coefficient S, such as hafnium oxide, silicon nitride or hafnium silica, and the upper insulating dielectric layer adopts a dielectric material with a low conduction band offset ΔEc, such as titanium dioxide, gallium oxide or strontium titanium oxide. According to the present invention, the Fermi energy level pinning effect is weakened, the electronic barrier is reduced, and further the performance of a germanium-based Schottky NMOS device is improved. Compared with the prior art in which a single insulating dielectric layer such as Al2O3 is adopted, the ...

Method and system for calculating section equivalent impedance and new energy machine end short-circuit ratio

The invention provides a method and a system for calculating section equivalent impedance and a new energy machine end short circuit ratio. The method comprises the following steps: acquiring data of a plurality of interconnected sections needing equivalence in a regional power grid; enabling a plurality of interconnected sections needing equivalence in the regional power grid to be equivalent into one section; calculating the equivalent impedance of one section based on the data of the plurality of interconnected sections; and taking the equivalent impedance of one section as the equivalent impedance of the multi-interconnection section of the regional power grid. According to the equivalent impedance calculation method, the short-circuit impedance of a plurality of interconnected sections required to be equivalent in the regional power grid is equivalent to one grid-connected impedance, so that the power grid topology is further simplified, the calculation amount is reduced, and the equivalent ...

Skylight mechanical group same-group online correction tool

The invention discloses a skylight mechanical group same-group online correction tool, and relates to the technical field of automobile sunroofs, the skylight mechanical group same-group online correction tool comprises a workbench, an oil injection mechanism comprises two first U-shaped frames, two diverters, an oil tank and a first controller, a first electric push rod is fixed to the top of the inner wall of each mounting frame, and a second electric push rod is fixed to the top of the inner wall of each mounting frame; mounting holes are formed in the top of the oil tank, an atomizing nozzle is mounted in each mounting hole, an oil inlet pipe fixedly penetrates through the top of the oil tank, an oil pump is mounted at the top of the oil tank, and a three-way pipe is mounted at the output end of the oil pump. And the lubricating time of skylight mechanical group parts in the later use process is effectively prolonged, that is, the service life of the automobile skylight is effectively ...

DISPOSABLE SKIN SURFACE DRY ELECTRODE AND MANUFACTURING METHOD THEREFOR

A disposable skin surface dry electrode used in the field of medical appliances, and a manufacturing method therefor. The dry electrode comprises a flexible PCB base material (1), and an electrode micro-needle array (2) and a metal button that are respectively arranged on the upper surface and the lower surface of the flexible PCB base material (1). A conducting medium for conducting the electrode micro-needle array (2) and the metal button is arranged penetrating the flexible PCB base material (1). The electrode micro-needle array (2) is manufactured on the flexible PCB base material (1) by using a matured electroplating process rather than a micro-machining process, so the cost is low, no hydrofluoric acid is used, and volume production is applicable. The dry electrode is manufactured on the flexible PCB rather than substrates such as silicon and metal, so the dry electrode is flexible. The dry electrode in use is directly attached to the skin surface of a user without causing pain or ...

Road congestion detection method based on lane line and vehicle identification

The invention discloses a road congestion detection method based on lane line and vehicle identification, and the method comprises the following steps: S101, obtaining a road scene image around a vehicle, inputting the road scene image into a vehicle detection model and a lane line model which are obtained through pre-training, and obtaining the vehicle information and lane line information of the scene image; and identifying the road scene image through the vehicle detection model to obtain the number of surrounding vehicles in the road scene image, and inputting the scene image into a pre-trained lane line detection model after obtaining vehicle information to obtain all lane lines in the current scene. According to the invention, hysteresis early warning caused by video acquisition and reanalysis is avoided, the cost performance is high, meanwhile, the devices can share road information for early warning, the detection efficiency of road congestion is improved, and traffic dispersion ...

METHOD FOR MONITORING ACTIVITY OF FAULT ZONE, AND EXPLORATION METHOD AND DEVICE

Disclosed are a method for monitoring the activity of a fault zone, and an exploration method and device. Said method comprises: arranging, according to the monitoring accuracy, a plurality of monitoring points in a target region to be measured; monitoring charged particles overflowing from the surfaces of various measuring points; outputting measurement data related to the characteristics of the charged particles, and analyzing the measurement data; and drawing a schematic diagram of the fault zone distribution. As it is innovatively proposed that the exploration of the distribution of a fault zone and the monitoring of the activity of a fault zone are achieved by monitoring the characteristics of underground charged particles overflowing from the earth surface, achieving non-destructive exploration while improving the exploration accuracy of a fault zone. The present invention not only enables exploration of a fault zone in both rural and urban areas, but also enables monitoring of the ...

Bridge monitoring system with safety degree estimation function

The invention discloses a bridge monitoring system with a safety degree estimation function, which comprises a control terminal used for collecting and processing data and a monitoring end installed at a bridge section, and is characterized in that the control terminal comprises a cabinet used for protecting a main body part of internal equipment, a control host is arranged in the cabinet, and the main body part is connected with the control host; according to the bridge monitoring system with the safety degree pre-estimation function, a mode that one terminal controls a plurality of monitoring sub-terminals is adopted, safety evaluation and daily maintenance monitoring are carried out on a large-scale bridge project, and the terminal and the monitoring sub-terminals are connected with each other, so that the safety degree pre-estimation function is realized. According to the bridge detection system, wireless communication data exchange and chart data generation are carried out by adopting ...

DUAL-PULSE FLASH RAMAN METHOD AND SYSTEM FOR REPRESENTING THERMOPHYSICAL PROPERTY OF TWO-DIMENSIONAL NANOMATERIAL

A dual-pulse flash Raman method and system for representing thermophysical property of a two-dimensional nanomaterial. The dual-pulse flash Raman method for representing the thermophysical property of the two-dimensional nanomaterial comprises: obtaining temperature rise data of a sample (A) by means of a heating pulse laser and a detection pulse laser which are different in wavelengths and are the same in pulse periods; and determining thermophysical property parameters of the sample (A) on the basis of the temperature rise data.

COMPOUND, LIQUID CRYSTAL MEDIUM CONTAINING SAME, AND USE THEREOF

Disclosed is a compound, with the structure formula thereof being as shown in formula (I) below. The compound disclosed by the present invention can be used as a liquid crystal compound, and at the same time, same also overcomes the problem of poor solubility of traditional dibenzothiophene liquid crystals, and can thus be better applied in the field of liquid crystal materials. Also disclosed are a liquid crystal medium containing the compound and the use thereof.

MOUNTING STRUCTURE AND MOUNTING METHOD FOR CAB BOW CAP

A mounting structure and a mounting method for a cab bow cap. The mounting structure for a cab bow cap comprises a center positioning structure and a side positioning structure that are disposed between the bow cap (1) and a vehicle body (2). The center positioning structure comprises a bow cap positioning element and a vehicle body positioning element. The vehicle body positioning element and the bow cap positioning element cooperate to perform positioning in the transverse direction of the cab. The side positioning structure comprises multiple positioning holes formed in a mounting surface of the bow cap (1), and comprises positioning plates (5) fixed to a side wall of the vehicle body (2). The positioning plates (5) and the positioning holes in the mounting surface of the bow cap (1) are fixedly connected by means of fasteners, and adjustment elements are disposed between the positioning plates (5) and the positioning holes in the mounting surface of the bow cap (1). The mounting structure ...

Boar phenotype detection method, device, storage device and system

The invention discloses a boar phenotype detection method, device, storage medium and system, and the method comprises the steps: reading the electronic ear tag information of a to-be-detected pig, employing a preset visual system to automatically shoot the to-be-detected pig, and carrying out the phenotype information calculation according to a plurality of shot images, thereby obtaining the phenotype information of the to-be-detected pig, and achieving the detection of the phenotype of the to-be-detected pig. According to the boar phenotype detection method, device, storage medium and system, the accuracy and convenience of boar phenotype detection are improved.

SR- AND MG-DOPED AMORPHOUS APATITE MATERIAL AND CRYSTALLINE APATITE MATERIAL

The present invention relates to the field of biomedical materials, and provides a Sr- and/or Mg-doped amorphous apatite material and crystalline apatite material. Ca(NO3)2, Mg(NO3)2, Sr(NO3)2, (NH4)2HPO4, and ammonia are raw materials for fast preparation of an amorphous apatite material doped with Sr or Mg in different concentrations, and the amorphous apatite material is then thermally treated to be converted into a nanosized calcium-deficient hydroxyapatite or nanosized tricalcium phosphate material doped with Sr or Mg in different concentrations. Compared with the conventional crystalline hydroxyapatite material, the amorphous material has higher solubility. With Sr or Mg doped, Sr facilitates formation of new bone, reduces bone resorption, regulates calcium metabolism, and lowers the osteoclastic activity; Mg can affect the early stage of bone growth, and regulate and control growth and reformation of bone. The synthesized amorphous apatite and a crystalized product thereof have a ...

METHOD FOR EXTRACTING CHARGE DISTRIBUTION ALONG CHANNEL IN MOS TRANSISTOR

Provided is a method for extracting charge distribution along a channel in a metal-oxide-semiconductor (MOS) transistor. The method is applied in extraction of distribution of interface state charges and gate dielectric charges in an MOS transistor and comprises: adding an MOS transistor to a test circuit, and measuring, by a charge pump current test method, two charge pump current curves of a drain open circuit or a source open circuit of the MOS transistor before and after stress, one being an origin curve, and the other being a post-stress curve; and finding a point B on the post-stress curve corresponding to any point A on the origin curve, and estimating the quantity of locally generated interface state charges and gate dielectric layer charges according to a charge pump current variation and a voltage variation of local points. The method can extract the distribution of charges from a drain or source to a channel easily and rapidly with the assistance of a computer.

License plate recognition method, license plate recognition device, electronic equipment and storage medium

The invention provides a license plate recognition method, a license plate recognition device, electronic equipment and a storage medium, and belongs to the technical field of artificial intelligence. An initial license plate image of a target vehicle is obtained, the initial license plate image comprises a license plate of the target vehicle, the length-width ratio of the license plate in the initial license plate image is calculated, and the length-width ratio data of the license plate is obtained; determining the license plate type of the license plate according to the length-width ratio data of the license plate, if the license plate type is a double-row license plate, cutting the initial license plate image to obtain a first intermediate license plate image and a second intermediate license plate image, and splicing the first intermediate license plate image and the second intermediate license plate image to obtain a second intermediate license plate image; and performing feature extraction ...

Model compression method and device based on channel pruning, equipment and medium

The invention relates to the technical field of deep learning, and provides a model compression method and device based on channel pruning, equipment and a medium, and the method comprises the steps: obtaining a sample data set with labeled data, and carrying out the iterative training of a preset first detection model through the sample data set, and obtaining a second detection model; performing sparse training on the second detection model to obtain scaling factors corresponding to each output channel of the second detection model; the scaling factor is used for representing the importance degree of each output channel of the second detection model; pruning an output channel of the second detection model according to the scaling factor so as to compress the second detection model to obtain a third detection model; the number of output channels of the third detection model is an integral multiple of eight; and performing knowledge distillation on the third detection model based on the ...

LED ILLUMINATION DEVICE WITH HONEYCOMB TYPE HEAT DISSIPATING STRUCTURE

A LED illumination device with honeycomb type heat dissipating structure comprises a heat dissipating body (100) and an illumination unit (200). The heat dissipating body (100) has a bottom surface (110), a top surface (120) around the bottom surface (110), and a plurality of tubular honeycomb units (130) extended from the bottom surface (110) to the top surface (120). Each honeycomb unit (130) is composed of six unit walls (131) with substantially equal length, and each unit wall (131) is attached to the unit walls (131) of other honeycomb units (130). A first mounting portion (140) in the middle of the bottom surface (110) and a second mounting portion (150) around the first mounting portion (140) are formed in the bottom surface (110) of the heat dissipating body (100), and any end of the honeycomb unit (130) above the first mounting portion (140) and the second mounting portion (150) is enclosed. The illumination unit (200) comprises a group of internal illuminating lamps (210) disposed ...

Material recoil production management system

The invention discloses a production management system for material recoil. The production management system comprises a device definition module, an assembly control standard definition module, a feeding module, a mounting module and a recoil module, the device definition module is used for defining information of the device; the assembly control standard definition module enables a material at a correct position on the device to be installed at a correct position on a product; the feeding module is used for binding correct materials and positions on the device according to an actual mounting sequence; the mounting module binds the buffer device loaded as required with a station or equipment; and when the recoil module is used for processing the product, the material surplus on the device is updated in real time. According to the invention, the assembly tracing information between the product and the material under the recoil mode is established, the material use condition is monitored ...

Rapid power control method and system suitable for network construction type equipment

The invention discloses a rapid power control method and system suitable for network construction type equipment, and the system comprises an EMS system, a stability control device, a power coordination controller, and a VSC converter, and the EMS system and the stability control device are connected with the power coordination controller through a communication network. And the power coordination controller sends the decomposed fast power control instruction to the power controller corresponding to each VSC converter through the communication network, and each VSC converter is connected with the network construction type equipment and sends a power response control signal to the network construction type equipment. According to the rapid power control method and system suitable for the network construction type equipment, on the basis that related network construction control characteristics are not affected, the ms-level power response speed of the whole station is achieved, the rapid ...

DNA METHYLTRANSFERASE INHIBITOR AND CGAMP PHARMACEUTICAL COMPOSITION FOR TUMOR PREVENTION AND TREATMENT

Provided is a DNA methyltransferase inhibitor and cGAMP pharmaceutical composition for tumor prevention and treatment. The present invention discloses that joint treatment of a DNA methyltransferase inhibitor and cGAMP has an immunization activation and regulation function, and thus can significantly inhibit tumor growth and prolong the survival of a tumor mouse. It shows in action mechanism research that the joint treatment of the DNA methyltransferase inhibitor and cGAMP can activate functions of STING and related paths thereof, induce the expression of an interferon, and thus yield the effects of tumor inhibition and life extension.

Modularized hydrogen circulating pump structure and multistage pump working system

The invention discloses a modularized hydrogen circulating pump structure which comprises a pump body, two rotating shafts arranged in the pump body in parallel, a bevel gear set and a cam set, the rotating shafts are sleeved with the bevel gear set and the cam set, and the bevel gear set and the cam set are arranged in the extending direction of the rotating shafts. The rotor coil is arranged on the cam group; the stator coil is arranged on the pump body and is matched with the rotor coil; the pump body comprises a pump cover, a middle pump body and an outer side pump body which are sequentially arranged in the extending direction of the rotating shaft, and through holes are formed in the opposite positions of the pump cover, the middle pump body and the outer side pump body. The pump cover, the middle pump body and the outer side pump body are fixed through a long shaft penetrating rod penetrating through the through holes and hexagon nuts connected to the two sides of the long shaft ...

METHOD FOR REALIZING ISOLATION AMONG ACTIVE REGIONS OF GERMANIUM-BASED MOS DEVICE

Discloses is a method for realizing isolation among active regions of a germanium-based MOS device. A surface of a germanium-based substrate is covered by a thin layer of polycrystalline silicon or polycrystalline silicon germanium; then, with the active regions being protected, a germanium-dioxide isolating structure, having a surface covered by a silicon dioxide layer or a silicon germanium oxide layer, is formed by two-step oxidation. The two-step oxidation process using polycrystalline silicon or polycrystalline silicon germanium as a sacrifice layer is conducive to improving the isolating quality of the germanium dioxide and reducing the bird's beak effect generated by oxidation of local field oxygen, so that the performance of the germanium device is significantly improved.

SEMICONDUCTOR DEVICE AND FABRICATION METHOD THEREOF

A semiconductor device and a fabrication method thereof are provided. The fabrication method of the semiconductor device comprises that: a germanium-based semiconductor substrate is provided (S1); shallow trench isolation regions are formed in said germanium-based semiconductor substrate (S2); a gate dielectric layer is formed on active regions (S3); a gate is formed on said gate dielectric layer (S4); a first ion implantation process is processed in source-drain extension regions which are located in the active regions on both sides of the gate (S5), wherein the implanted ion includes silicon or carbon; a second ion implantation process is processed in source-drain extension regions which are located in the active regions on both sides of the gate (S6); sidewalls are formed on both sides of the gate (S7); a third ion implantation process is processed in deep source-drain regions and a rapid thermal annealing process is processed to the whole germanium-based substrate (S8); contact holes ...

一种道路桥梁支座

... 本发明涉及桥梁支座领域，具体的说是一种道路桥梁支座，包括地基、支撑机构、缓冲机构和警示机构，两个规格相同的所述支撑机构安装在地基上，且两个支撑机构的顶部安装有安装座，所述支撑机构包括安装柱、安装腔和支撑柱，所述安装柱固定安装在地基上，且安装柱的顶部开设有垂直设置的安装腔，所述安装腔内插设有滑动连接的支撑柱，且支撑柱的顶部与安装座的下表面固定连接，所述支撑机构还包括弧形水泥块和橡胶垫，所述弧形水泥块固定安装在安装腔的内底壁中，所述橡胶垫固定嵌合在支撑柱的下表面，且橡胶垫与弧形水泥块的弧面接触，而所述安装座上固定安装有桥体。本发明提供的道路桥梁支座具有减震以及支座倾斜提示的优点。 ...

METHOD FOR DEPOSITING HIGH K GATE MEDIUM ON GRAPHENE MATERIAL AND USE THEREOF

Disclosed are a method for depositing a high k gate medium on a graphene material and use thereof, belonging to the field of integrated circuit techniques. In the method, firstly, a graphene material having a flat surface without defects or with less defects is selected as a substrate sample for depositing a high k medium; the substrate sample is placed in a vacuum cavity of a scanning electron microscope, which is evacuated to be in a range of 5E-4 to 1E-7, and the surface of the substrate sample is scanned using a low-energy focused electron beam for 30 s to 5 min, the low-energy electron beam having an acceleration voltage of 1-15 kV; a thin layer of an amorphous carbon thin film having a thickness in a range of 0.3 nm to 3 nm is deposited on the surface of the substrate sample in the scanning process; and the substrate sample treated by the electron beam is placed in an ALD device to be deposited with the high k medium material. In the present invention, the medium deposition can also ...

STRAINED-CHANNEL FIELD-EFFECT TRANSISTOR AND MANUFACTURING METHOD THEREOF

A strained-channel field-effect transistor and a manufacturing method thereof are provided. The transistor includes a substrate (14), source/drain regions (15, 16), a channel, a gate dielectric layer (17), and a gate (18), wherein L-shaped composite isolation layers are arranged between the source/drain regions and the substrate, and covering the bottoms of the source/drain regions and a part of the side faces of the source/drain regions adjacent to the channel, and each of the L-shaped composite isolation layers is composed of an L-shaped thin isolation layer (20) contacting with the substrate directly, and an L-shaped high stress layer (21) contacting with the source or drain region directly. Since the high stress layer can induce strain in the channel, the carrier mobility of the transistor can be increased. At the same time, since the thin isolation layer can prevent a leakage current to the channel, the ability of suppressing the short-channel effect is improved.

RETAINING DEVICE, AND HEAD-MOUNTED APPARATUS

Embodiments of the present application disclose a retaining device and a head-mounted apparatus, the retaining device comprising: a main sliding plate, a top sliding plate, at least one pair of retaining plates having synchronization rods, and a locking mechanism, wherein the top sliding plate is movably connected to the main sliding plate. The pair of retaining plates are movably connected to the main sliding plate, and form an accommodating space with the top sliding plate, the synchronization rods have one end rotatably connected to the retaining plates and another end rotatably connected to the top sliding plate. The locking mechanism is on a motion path of the top sliding plate. When the top sliding plate moves in a first direction, the top sliding plate drives the pair of retaining plates to move toward each other via the synchronization rods, such that the pair of retaining plates retain and accommodate a member to be retained in the accommodating space, and at the same time, the ...

Power-assisted steering motor control method

The invention is suitable for the field of commercial vehicles, and aims to solve the problems that a traditional hydraulic power-assisted steering system is large in resistance and low in efficiency, leakage is likely to occur after long-term use and improper maintenance, and accidents such as explosion can be possibly caused in the running process of the commercial vehicles. The invention provides a power-assisted steering motor control method and electric auxiliary steering motor control. A permanent magnet synchronous motor is applied to an electric auxiliary steering motor. And a reference value can be obtained through accurate and rapid modulation by applying a fuzzy PI algorithm. Meanwhile, the rotor position of the permanent magnet synchronous motor can be estimated by adopting the extended Kalman filter, and the size and the cost of the controller can be reduced by detecting the rotor position through a traditional sensor. A final experiment result shows that permanent magnet synchronous ...

DOUBLE-AUXILIARY-RESONANT-POLE TYPE THREE-PHASE SOFT SWITCHING INVERTER CIRCUIT AND MODULATION METHOD THEREFOR

A double-auxiliary-resonant-pole type three-phase soft switching inverter circuit and a modulation method therefor. The circuit comprises three-phase main inverter circuits and three-phase double-auxiliary-resonant commutation circuits, wherein the phase-A double-auxiliary-resonant commutation circuit (1), the phase-A main inverter circuit (2), the phase-B double-auxiliary-resonant commutation circuit (3), the phase-B main inverter circuit (4), the phase-C double-auxiliary-resonant commutation circuit (5) and the phase-C main inverter circuit (6) are sequentially connected in parallel and are connected to a DC power source (E) in parallel, and all main switching tubes work according to the modes of sine pulse width modulation and complementary switch-on with a phase difference being 180 degrees. By means of the circuit and the modulation method therefor, separation of resonance current of the double-auxiliary-resonant commutation circuits and load current at the current commutation time ...

AFFIXABLE BODY SURFACE ELECTRIC SIGNAL COLLECTING DEVICE AND MOUNTING METHOD THEREFOR

An affixable body surface electric signal collecting device comprising a flexible electrode band (101), a flexible substrate layer (103), and an adhesive film layer (104) arranged in a downward sequence. The flexible electrode band (101) comprises and integrates multiple radially-shaped flexible dry electrodes (1013). The flexible dry electrodes (1013) run through the flexible substrate layer (103) and the adhesive film layer (104) to be affixed with the adhesive film layer (104) at the bottom of the adhesive film layer (104). An adhesive agent (1044) is attached to the bottom of the adhesive film layer (104), used for affixing the flexible dry electrodes (1013) and the adhesive film layer (104), and used for affixing to a to-be-tested part on the body surface of a human body. Also provided is a mounting method for the device. By affixing the flexible dry electrodes (1013) to a to-be-tested area of the human body via the adhesive film layer (104), the flexible dry electrodes (1013) is allowed ...

TRANSMISSION TOWER CLIMBING INSPECTION ROBOT

A transmission tower climbing inspection robot, comprising: a carrier (1) for carrying a detection device; an upper climbing part having a pair of upper arms (2) hingedly connected to the upper end of the carrier (1) and controlled to rotate at a rotation angle around a corresponding hinged shaft, and hand claws (3) connected to the non-hinged end of the upper arms (2), the top of the hand claw (3) being an upward arching portion; and a lower climbing part having a pair of lower arms (6) hingedly connected to the lower end of the carrier (1) and controlled to rotate at a rotation angle around the corresponding hinged shaft, and foot claws (7) connected to the non-hinged end of the lower arms (6), the lower portion of the foot claw (7) being an upward arching portion; both the upper arms (2) and the lower arms (6) have a retractable structure, being equipped with corresponding drive devices to enable the upper arms (2) and the lower arms (6) to extend and retract alternately. The robot has ...

Industrial process operation state evaluation method and system, electronic equipment and storage medium

The invention provides an industrial process operation state evaluation method and system, electronic equipment and a storage medium, and belongs to the technical field of intelligent industry. The method comprises the following steps: acquiring sample data representing a current operation state in an industrial process; constructing a time domain signal matrix according to the sample data; performing conversion from a time domain to a frequency domain according to the time domain signal matrix to obtain a frequency domain signal matrix; inputting the time domain signal matrix and the frequency domain signal matrix into a pre-trained hybrid twin neural network model to respectively obtain a corresponding time domain score value and a frequency domain score value; and obtaining a target score value in the current operation state in the industrial process according to the time domain score value and the frequency domain score value. According to the method, labels are faded by processing ...

Multifunctional mobile charging vehicle

The invention relates to the technical field of new energy and energy conservation, and discloses a multifunctional mobile charging vehicle which comprises an alternating current side, a direct current side, a charging module matrix and a bidirectional converter, the alternating current side and the direct current side are connected through the charging module matrix and the bidirectional converter to form a ring topology; the alternating current side is provided with a grid-connected and off-grid change-over switch between the charging module matrix and the alternating current end of the bidirectional converter; the AC side is used for connecting an external power supply on one side of the AC end of the charging module matrix, and the AC side is used for connecting a load on one side of the AC end of the bidirectional converter; the direct current side is connected with a charging pile and an energy storage device. The advantages of the UPS device, the EPS device and the electric vehicle ...

Method and system for evaluating health state of oil delivery pump induction motor

The invention provides a health state assessment method and system for an oil delivery pump induction motor, and relates to the technical field of motor monitoring. Rotor health characteristics, stator health characteristics, bearing health characteristics and power supply quality health characteristics are acquired, and health indexes of all parts of the motor are calculated based on a part health index calculation formula; and setting a semi-quantitative risk index RPN of each component of the motor, and obtaining the health index of the motor in combination with the component health index score of each component. The technical problem that in the prior art, the objectivity and accuracy of evaluation and judgment of the health state of the component parts of the induction motor and the overall health state of the induction motor are insufficient is solved. The technical effects of objectively evaluating the health state of the oil delivery pump induction motor and improving the evaluation ...

METHOD FOR PREDICTING RELIABILITY SERVICE LIFE OF SOI MOSFET DEVICE

A method for predicting the reliability service life of an SOI MOSFET device. The method includes: measuring the relationship between the gate resistance and the temperature change of an SOI MOSFET device at different test bench temperatures; performing accelerated service life test on the SOI MOSFET device at different test bench temperatures so as to obtain the degradation relationship between a parameter characterizing the service life of the device and the stress time and the service life during which self-heating exists when the parameter degrades to 10%; performing self-heating measurement on the measured service life of the device using the measured self-heating temperature and an Arrhennius model to obtain the intrinsic service life in which the service life is not affected by the self-heating temperature; performing self-correction on the drain terminal current change caused by self-heating; performing self-heating correction on the collision ionization rate caused by hot carriers ...

Vehicle position determination method and device, radar and storage medium

The invention provides a vehicle position determination method and device, a radar and a storage medium. The method comprises the following steps: acquiring M frames of echo signals corresponding to the radar by taking M frames as frame lengths; wherein each frame of echo signal in the M frames of echo signals comprises a plurality of echo signals; the plurality of echo signals are single-frame echo signals reflected by a vehicle on a target road, and the target road is a road detected by the radar; determining the lane of the vehicle on the target road in each frame of echo signal according to the M frames of echo signals; if the lane where the vehicle is located on the target road comprises the first lane and the adjacent lane of the first lane, calculating probability values of the vehicle on the first lane and the adjacent lane in each frame of echo signal according to the M frames of echo signals; wherein the first lane is a lane where the vehicle is determined according to a previous ...

LIQUID CRYSTAL COMPOSITION AND APPLICATION THEREOF

Disclosed are a liquid crystal composition and an application thereof. The liquid crystal composition comprises a component a, a component b, and a component c. The component a is at least one of compounds represented by formula I, the component b is a liquid crystal compound of which the dielectric anisotropy is greater than 3, and the component c is a liquid crystal compound of which the dielectric anisotropy is -3 to 3. The liquid crystal composition has high contrast performance and particularly, has a low change rate at a low temperature, that is, the contrast drop is relatively little by comparing at low temperature (for example, below -20 degrees centigrade) and a normal temperature. In addition, the liquid crystal composition has performance suitable for practical applications such as a wide nematic phase range, a proper dielectric anisotropy (Δε), optical anisotropy (Δn) and operation voltage, an excellent response time, a high electrical resistivity and voltage retention rate, ...

MODULATOR AND DESIGN METHOD THEREOF

A modulator and a design method thereof are provided. The modulator includes an analog filter (11) for pre-modulating input analog signals; an analog adder (15) for summing the analog signals; a multi-bit quantizer (13) for converting the sum of the analog signals into multi-bit digital signals output; a digital loop filter (12) for filtering the multi-bit digital signals output from the multi-bit quantizer (13); and a multi-bit feedback digital-to-analog converter (14) for converting the filtered multi-bit digital signals to feedback analog signals. Steady modulators may be constructed rapidly according to this solution. The problem of non-linearity of the multi-bit feedback digital-to-analog converter can be solved by adopting the digital loop filter to shape the quantization noise and the mismatch noise simultaneously. The modulator has the stability and the ability of noise shaping, and can be used in high speed and high precision digital-to-analog conversion.