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笔记本电脑(15.6寸)

Net spoke reinforced commercial vehicle hub and production device and production method thereof

The invention discloses a mesh spoke reinforced commercial vehicle hub and a production device and a production method thereof, and relates to the technical field of commercial vehicle hub production, the mesh spoke reinforced commercial vehicle hub comprises a hub body, the hub body comprises reinforced mesh spokes and an aluminum alloy layer, the production device of the mesh spoke reinforced commercial vehicle hub comprises a base, and the base is provided with an aluminum alloy layer. A production method of a mesh spoke reinforced commercial vehicle hub comprises the following steps that S1, a circular spoke plate blank is stamped from a steel plate, the hub produced through the method is light in weight, the hardness of bolt holes is high, the abrasion resistance is good, stamping machining of multiple positions can be conducted on the same stamping device, the machining efficiency is improved, and the production cost is reduced; the stamping part can be cooled in time after stamping ...

Synthesis method of sequence-encodable polyion liquid

The invention discloses a synthesis method of sequence-encodable polyion liquid, and belongs to the field of high polymer materials. The method comprises the following steps: firstly synthesizing a series of azide-tertiary amine type monomers through a sulfydryl-alkene click reaction, then alternately carrying out copper-catalyzed azide-alkyne click reaction and quaternization reaction with brominated propyne, and preparing the linear monodisperse polyion liquid by adopting a gradual growth synthesis strategy. And coding is realized through single structure control. The preparation method provided by the invention is mild in reaction condition, high in atom utilization rate and simple and convenient in post-treatment, and the product monodisperse polyion liquid has potential application value in the fields of biological medicine, information transmission and the like.

Method for energy storage and yield increase of tight oil reservoir

The invention relates to the technical field of oil field oil extraction, and belongs to a method for energy storage and yield increase of a tight oil reservoir for an oil field. The problems that the yield is gradually reduced and even liquid supply is insufficient in the production process of a tight oil reservoir oil well are solved. Firstly, measure wells needing energy storage are screened, then an organic matter blocking remover and an imbibition agent with a crude oil imbibition and replacement function are prepared, the prepared organic matter blocking remover and the imbibition agent are injected into a stratum in a segmented plug mode, wax colloid blocking in the near-well range is removed through the organic matter blocking remover, the seepage capacity of a reservoir is improved, and stratum energy is supplemented through the imbibition agent. After injection is finished, the well shutting stage is started, in the well shutting process, the imbibition agent can be replaced with ...

Method, device and equipment for evaluating disaster risk in territorial space planning

The invention provides a disaster risk assessment method, device and equipment in territorial space planning, and relates to the technical field of image processing. Trend distribution points are acquired for remote sensing images under each scale to represent pixel points with relatively strong marginal features in the images; determining a connection degree value between the current pixel point and the trend distribution pixel points around the current pixel point; in combination with the mutability of the relation change corresponding to the scale change of the pixel point under different scales, the relation degree value of the pixel point is corrected, and the final relation degree value of each pixel point is analyzed subsequently. According to the connection degree values of the pixel points, the degree that the pixel points are shadow features of edges formed by other trend distribution pixel points is represented, so that the screened key points are more accurate, in the remote ...

Virtual anemometer tower fan power prediction method

The invention provides a fan power prediction method for a virtual anemometer tower, and relates to the technical field of fan prediction, and the method comprises the following steps: obtaining historical wind measurement parameters of a fan and topographic parameters of a wind power plant where the fan is located; the real-time wind direction of the fan is determined according to the historical wind measurement parameters of the fan and the terrain parameters of the wind power plant where the fan is located; environmental parameters of a wind power plant where the draught fan is located are obtained, and the environmental parameters are preprocessed; constructing a fan optimization prediction network model; and inputting the real-time wind direction of the fan and the preprocessed environmental parameters into the fan optimization prediction network model, generating the wind speed of the high-rise where the fan is located, and determining the fan power according to the wind speed of ...

Display substrate, driving method thereof and display device

The invention provides a display substrate, a driving method thereof and a display device.The display substrate comprises a substrate base plate which comprises a display area and a non-display area surrounding the display area; the grid lines are located in the display area and extend in the first direction; the grid lines are arranged in the non-display area, the grid driving circuit is located in the non-display area, the energy-saving circuit is coupled between the signal output end of the grid driving circuit and the multiple grid lines, the sequential control circuit is coupled with the energy-saving circuit, and the grid driving circuit is used for outputting grid signals needed by the corresponding grid lines; wherein the time sequence control circuit is used for detecting a static area in the display area and outputting a control signal to the energy-saving circuit; the energy-saving circuit is used for cutting off the output of the grid signal of the grid line corresponding to ...

GRAPHENE FIBER NON-WOVEN FABRIC AND PREPARATION METHOD THEREFOR

Disclosed are a graphene fiber non-woven fabric and a preparation method therefor. The non-woven fabric is obtained by filtering and depositing a dispersion of graphene short fibers through a filter net and drying and reducing same, so that the structural unit of the non-woven fabric is graphene short fibers that are stacked in a disorderly manner and bonded to each other, and the fibers are overlapped to form a large number of holes through which a liquid or a gas can pass. The graphene fiber non-woven fabric has a relatively good mechanical strength and tenacity, and is completely composed of graphene fibers, and does not contain a high-molecular material as a skeleton or an adhesive, etc. The electricity and heat conducting performances of a network structure formed by overlapping the graphene fibers and being reduced are excellent. The non-woven fabric can be used as a multifunctional high-performance fabric.

PRODUCTION LINE OF HEMP BAST FIBER

A production line of hemp bast fiber comprises various devices for carding, cutting, degumming, high temperature washing, separating and water washing, softening, drying, batching and applying oil, permeating the fiber and reconditioning, stretch-breaking carding, and combing and sorting. The degumming device comprises a mechanical degumming device, a biological degumming device, and a high temperature digesting degumming device. A yarn hanging rack is a hollow post(201) which is communicated with several hollow beams(202). The hollow beams(202) are provided with several hanging rods(204) which are provided with several holes on the side. The separating and water washing device comprises several beaters(508) and separating rollers(509) which are arranged at intervals, and water is sprayed from the upper part. The batching and applying oil device squeezes and rubs the fiber, and oil is sprayed from the upper and lower part respectively. The stretch-breaking carding device comprises a drawing ...

WIND TUNNEL MULTI-STAGE SOLAR EVAPORATION AND BRINE EXTRACTION SYSTEM

A wind tunnel multi-stage solar evaporation and brine extraction system, comprising a solar energy collector (1), an evaporation tank (2), a concentrated brine outlet (3), an air duct (4) and a fan (6), the evaporation tank (2) having an inclined slope. Brine that is heated by the solar energy collector (1) is discharged by means of the concentrated brine outlet (3) after water is evaporated in the evaporation tank (2), thus completing primary evaporation; brine that does not meet concentration requirements continuously flows back by means of an external pipeline into a next stage solar energy collector to be heated a second time, then undergoing secondary evaporation.

RAPID AND ENVIRONMENTALLY-FRIENDLY METHOD FOR PREPARING SINGLE-LAYER GRAPHENE OXIDE

Provided is a rapid and environmentally-friendly method for preparing a large amount of single-layer graphene oxide, comprising: 1) mixing, stirring and soaking graphite and a strong acid, adding a strong oxidant (ferrate) and a stabilizer, slowly heating and continuously stirring to oxidize and exfoliate graphite sheets; 2) performing centrifugal separation on the reaction liquid, removing the strong acid, slowly pouring the mud-like product into icy deionized water to dilute, leaving the same to stand, repeatedly washing the precipitate with diluted hydrochloric acid and deionized water, and obtaining single-layer graphene oxide by means of centrifugal separation. The method is simple, safe, and energy efficient, and does not use a polluting halogen or heavy metal oxidizing agent.

窑洞式建筑

房屋

景观花箱

Material grabbing variable-pitch structure

The utility model relates to a material grabbing distance changing structure which comprises a fixing plate, a driving mechanism fixedly arranged on the fixing plate and a transmission block driven by the driving mechanism to slide on the fixing plate, a plurality of sliding rails are evenly arranged on the fixing plate, and the sliding rails are connected with a plurality of distance changing rods perpendicular to the sliding rails through the sliding blocks in a sliding mode. A material grabbing device is installed at the end, away from the sliding rail, of the distance changing rod, a roller is arranged on the distance changing rod, a limiting hole corresponding to the roller is formed in the transmission block, the roller is movably limited in the limiting hole, the end, close to the material grabbing device, of the limiting hole is in a gathering shape, and the other end of the limiting hole is in a divergent shape. The clamping device has the advantages of being simple in structure ...

Compression molding equipment for neodymium iron boron rare earth permanent magnet

The invention relates to the technical field of rare earth production, in particular to compression molding equipment of a neodymium iron boron rare earth permanent magnet. The invention provides compression molding equipment of a neodymium iron boron rare earth permanent magnet, which can perform unified mechanical operation on blanking and compression. A neodymium iron boron rare earth permanent magnet pressing forming device comprises a base, a fixing support, an electric push rod, a pressing block and the like, the fixing support is fixedly connected to the right side of the base, the electric push rod is arranged at the upper end of the fixing support, a telescopic rod of the electric push rod is connected with the pressing block through a bolt, and a bearing platform is fixedly connected to the right side of the base and located below the pressing block. The device further comprises a rotating mechanism and a quantitative material guiding mechanism. A rotating mechanism and a quantitative ...

GIL air tightness detection device based on broadband ultrasonic detection and simulation method

The invention discloses a broadband ultrasonic detection-based GIL air tightness detection device and a simulation method. The device comprises two sections of GIL pipelines, two flange plates, a basin-type insulator, a sealing ring, a broadband sound acquisition piece and a processor, flange plates are arranged at the ends of the two sections of GIL pipelines, and the two sections of GIL pipelines are connected through the flange plates. The basin-type insulator is clamped between the two flange plates, and the two ends of the basin-type insulator are in sealed connection with the flange plates through sealing rings. The broadband sound collection part is movably arranged beside the GIL pipeline in the axial direction of the GIL pipeline and used for collecting sound signals generated by gas leakage of the GIL pipeline; and the processor is electrically connected with the broadband sound acquisition part, and is used for extracting the amplitude, frequency spectrum and time frequency change ...

Authentication method and device based on random key, equipment and storage medium

The invention provides an authentication method and device for authenticating a user identity based on a random key, equipment and a storage medium. The method comprises the steps of triggering a form sending event, obtaining a unique identifier of a current row, generating the random key by using a random number algorithm, and sending a form; binding the unique identifier with the random key, and setting a state value for the random key; adding the random key and the verification hyperlink to mail content in a mail template text part, and calling a mail sending interface to send a mail to a target website; logging in the target website, inputting a random key, and judging whether the user is a user with permission; and receiving the random key, and judging the state of the data verification code bound with the verification hyperlink. According to the invention, the binding of the user and the key is realized through internal establishment of a simple service, the verification function ...

Drawer type host case, computer host and desktop computer

The drawer type host case comprises a shell and a drawer box, the shell is horizontally arranged, the front end and the rear end of the shell are open, the drawer box can be inserted into the shell through the opening in one end of the shell, the front end and the rear end of the drawer box block the openings in the two ends of the shell, and the drawer box is used for installing electronic components; the four corners of the lower end of the shell are each provided with a foot pad bolt, each corner of the lower end of the shell is provided with a vertically-through through hole, the position, corresponding to each through hole, of the lower end of the drawer box is concavely provided with a screw hole matched with the corresponding foot pad bolt in a threaded mode, and when the drawer box is inserted into the shell, each screw hole is aligned with the corresponding through hole, and one foot pad bolt is inserted into the corresponding screw hole. And the foot pad bolts are in threaded ...

SILICON CARBIDE SINGLE CRYSTAL GROWTH DEVICE

The present application relates to a silicon carbide single crystal growth device, comprising: a growth chamber for placing a raw materials and providing a site where the raw material is sublimated by heat, wherein the growth chamber is divided into a raw material portion for placing the raw material and an air flowing area for the sublimation and crystallization of the raw material; and several thermally conductive containers arranged in the growth chamber, wherein same are arranged at the raw material portion, and are arranged separately from the inner wall of the growth chamber. The present application can effectively adjust the Si/C ratio in the growth chamber during the growth of the silicon carbide single crystal, thereby reducing the carbon inclusion defects generated by the growth of a single crystal.

SUPER-FLEXIBLE HIGH THERMAL CONDUCTIVE GRAPHENE FILM AND PREPARATION METHOD THEREFOR

Provided are a super-flexible high thermal conductive graphene film and preparation method therefor. The graphene film is obtained from ultra large homogeneous oxidized graphene sheets through processes of solution film-forming, chemical reduction, high temperature reduction, high pressure pressing and so on. The graphene film has a density of 1.93 to 2.11 g/cm3, is formed by graphene sheets with an average size of more than 100μm via overlapping with each other, contains 1-4 layers of graphene sheets and has few defects. The graphene film can be repeatedly bent for 1200 times or more, with elongation at break of 12-18%, conductivity of 8000-10600S/cm, thermal conductivity of 1800-2600W/mK, and can be used as a highly flexible thermal conductive device.

支架（适用水上光伏漂浮电站）

PROCESS FOR PREPARING CATALYST COMPRISING PALLADIUM SUPPORTED ON CARRIER

A process for preparing a catalyst comprising palladium supported on a carrier via a layered precursor, comprising the following steps: (1) synthesis of hydrotalcite layered precursor which comprises promoting metal element and aluminium on the surface of the carrier of Al2O3 microspheres, the atoms of the promoting metal and aluminium being highly dispersed by each other and bonded firmly to the carrier due to the crystal lattice positioning effect of the hydrotalcite crystal; (2) introduction of palladium into the carrier through impregnation; (3) drying; and (4) calcination and reduction with H2, the hydrotalcite layered precursor being converted into a composite oxide which consists of oxides of the promoting metal and aluminium, and the promoting metal element and aluminium being highly dispersed by each other and being able to separate and disperse the mainly active palladium element loaded later. The process has the advantages of improving the catalytic performance of the catalyst ...

Intelligence case and bag are prevented system of losing and are prevented losing intelligent case and bag

... 本实用新型提供一种智能箱包防丢失系统及防丢失智能箱包，所述系统包括用户终端、服务器及箱包，所述箱包通过内置的蓝牙模块与用户终端连接，所述用户终端与服务器通过无线方式连接，所述用户终端，用于使用蓝牙搜索邻近范围的箱包，并确定所述箱包的位置，同时将已搜索到的箱包对应的蓝牙地址传送至服务器，所述服务器，用于根据接收到的蓝牙地址匹配对应的用户终端，并通知所述蓝牙地址对应的用户终端，告知其丢失箱包的位置。通过本实用新型提供的智能箱包防丢失系统，当箱包远距离离开用户时，通过在服务器登记的其他用户提供定位，可准确得知已丢失的箱包位置。 ...

Simple to operate's current transformer

... 本实用新型公开了一种安装方便的电流互感器，包括壳体和底座，壳体上设有第一通孔，第一通孔的内外两侧均设置有滑轨，滑轨上滑动连接有底座，底座中间设有第二通孔，第二通孔内滑动设置有橡胶塞，橡胶塞位于外壳内侧的一端固定有第一金属盘；壳体的底部开设有凹槽，凹槽内设有卡件，壳体与底座之间还设有垫圈，底座包括固定座和安装座，安装座固定在固定座上，安装座设置有相对称的两条开口凹槽。本实用新型安装简便，检修和维护时，只需把卡件从安装座内退出，壳体就能从底座内拆卸下来，实用性高，减少了技术人员的负重，也大大减少了工作时间，从而降低了危险系数；而且提供了足够的金属接触面积，降低接触电阻，提高了测量精度。 ...

Small -size multi -functional vacuum packaging machine

... 本实用新型公开了一种小型多功能真空包装机，包括机壳、工作平台、抽气嘴、封和条、电机，所述小型多功能真空包装机脚轮上面有所述机壳，所述小型多功能真空包装机机壳内部有所述电机，所述小型多功能真空包装机机壳前端有所述工作平台，所述小型多功能真空包装机工作平台上端有加热棒，所述小型多功能真空包装机机壳前端上方有电脑板控制器，所述小型多功能真空包装机加热棒下方有所述封和条。有益效果在于：能够很好的压缩体积，节省物流成本，适当的延长保质期，结构简单，操作简单、便利，抽气速度很快，本机采用透明的有机玻璃盖，对包装过程一目了然，具有抽真空、封口、印字、冷却一次完成之功能，机体面板上设有抽真空时间、热封时间、冷却时间及温度高低等按键，根据实际包装物品设置，以达到最佳包装效果。 ...

Method for evaluating health state of distribution transformer based on multi-state-quantity model

The invention provides a method for evaluating the health state of a distribution transformer based on a multi-state-quantity model, and the method comprises the steps: firstly building a multi-state-quantity model for evaluating the health state of the distribution transformer, and carrying out the part division of all state quantities according to the data type of the distribution transformer; secondly, making corresponding evaluation rules for different state quantities, and making corresponding boundary parameters according to the evaluation rules; thirdly, performing state quantity scoring by applying different calculation methods according to the influence of each state quantity; then setting a weight value of each component according to the influence degree of the component corresponding to each state quantity on the operation of the distribution transformer; and finally, carrying out component weighted summation to obtain an overall health state result of the distribution transformer ...

Data recording and playback method of analog machine and related device

The invention provides a data recording and playback method of an analog machine and a related device, and the method comprises the steps: obtaining a communication data packet in the analog machine in a preset period in response to a recording starting command; storing the obtained communication data packet, wherein the communication data packet carries the corresponding unique identifier; in response to a recording stopping command, stopping acquiring and storing the communication data packet; in response to a playback command, playing back the stored communication data packet; and displaying the unique identifier of the currently played-back communication data packet. According to the method, interaction data in the analog machine are recorded, stored and played back, the interaction process of the analog machine can be reproduced, and the system-level module relevance problem can also be completely reproduced; according to the technical scheme, the unique identifier of the currently ...

Method for generating simulated SAR (Synthetic Aperture Radar) radar image from aerial image

The invention relates to the technical field of simulated image generation, and particularly provides a method for generating a simulated SAR (Synthetic Aperture Radar) radar image from an aerial image, which comprises the following steps of: carrying a visible light load by using an unmanned aerial vehicle, shooting the aerial image, carrying out simulation processing on R, G and B of the aerial image, detecting an edge in a red component R of the aerial image, and carrying out cross diffusion processing on the edge; pixel fuzzification processing is carried out on the green component G of the aerial image; adding noisy points to the blue component B of the aerial image; and calculating the weights of R, G and B according to the distance between the unmanned aerial vehicle and the target, and superposing the R, G and B to generate a simulated SAR radar image. According to the method, the unmanned aerial vehicle carries the low-cost visible light load and shoots the aerial image, the aerial ...

Head-mounted hair flusher

The invention belongs to the technical field of hair washing devices, and particularly relates to a head-mounted hair flusher which comprises an arc-shaped elastic part and a pedal type liquid supply assembly, earmuffs or fixing pieces are arranged at the two ends of the arc-shaped elastic part, and a flushing assembly is slidably connected to the arc-shaped elastic part and comprises a sliding block, a flushing head and a flushing hose. The pedal type liquid supply assembly comprises a liquid storage tank and a cylinder body, flushing liquid is contained in the liquid storage tank, a piston is vertically connected into the cylinder body in a sliding mode, the cylinder body is divided into an upper cavity and a lower cavity through the piston, the piston is connected with a connecting rod, the connecting rod penetrates through the top wall of the upper cavity and then is connected with a pedal, the lower cavity is communicated with a liquid inlet pipe and a liquid outlet pipe, and the liquid ...

Scene reconstruction method and device for drive test data

The invention provides a scene reconstruction method and device for road test data, and the method comprises the steps: collecting chassis data, camera data and integrated navigation data of a vehicle, the camera data comprising obstacle data and lane line parameter data, and the integrated navigation data comprising GPS data; performing extraction processing on the obstacle data to obtain relative parameters of each obstacle; performing extraction processing on the lane line parameter data to obtain data of a plurality of lane lines closest to the vehicle; performing sequence conversion on the GPS data to obtain ENU coordinate points; generating lane lines and a first lane according to the chassis data, the data of a plurality of lane lines closest to the vehicle and the ENU coordinate points; obtaining an absolute parameter of each obstacle according to the relative parameter of each obstacle and the parameter corresponding to the vehicle; the constructed simulation scene can simulate ...

FIRE-EXTINGUISHING COMPOSITION

A fire-extinguishing composition, which is composed of the following substances by mass percentage: an aromatic organic acid compound 20%-80%, and a phenolic compound 20%-80%; the fire-extinguishing composition uses the high temperature of pyrotechnic reagent combustion such that the fire-extinguishing composition produces a large amount of a fire-extinguishing substance. At a high temperature, the aromatic organic acid compound and the phenolic compound absorb heat, sublimate, decompose, and react with each other, releasing a large volume of the fire-extinguishing substance so as to extinguish a fire. The fire-extinguishing composition compensates for the loss in performance of an aerosol generating agent caused by a general cooling layer, and enhances the fire-extinguishing performance of a fire-extinguishing product as a whole, while reducing the temperature of a nozzle of the product; the fire-extinguishing composition has low sediment hygroscopicity and high insulation resistance, ...

VEHICLE BIAXIAL PARALLEL ELECTRIC DRIVE SYSTEM AND GEAR SHIFTING CONTROL METHOD THEREOF

A vehicle biaxial parallel electric drive system and a gear shifting control method thereof. The drive system comprises a drive motor I (1), a drive motor II (15), and an automated mechanical transmission. The automated mechanical transmission comprises a first-gear gear pair (3, 7), a second-gear gear pair (13, 7), a third-gear gear pair (5, 8), a fourth-gear gear pair (10, 8), an engaging sleeve I (4), an engaging sleeve II (12), a transmission input shaft I (6), a transmission input shaft II (11), and a transmission output shaft III (9). The drive system comprises drive motors and an automated mechanical transmission, is simple in structure and reasonably arranged, has high acceleration and gradeability, and implements smooth gear shifting, without any power interruption. By using the gear shifting control method, the continuity of generation of power required for driving can be ensured during a gear shifting process. In addition, kinetic energy ensured during a vehicle traveling process ...

Database offline method and device, electronic equipment and computer readable storage medium

The invention discloses a database offline method and device, electronic equipment and a computer readable storage medium, and the method comprises the steps: recognizing a database combination containing a plurality of target databases from a to-be-offline database set; according to the running state information of each target database, determining to-be-verified information of the database combination; obtaining a verification result of the to-be-verified information according to the verification rule; and under the condition that the verification result meets the offline condition, each target database is controlled to be offline. According to the method and the device, on one hand, checking covers all the checking items of the database combination, and offline operation is ensured to be safe and free of risks, and on the other hand, the checking items which are mutually dependent among the target databases are shielded by abstracting the target databases into a set of database combination ...

DEVICE FOR BRINE EVAPORATION AND EXTRACTION BY SOLAR ENERGY

A device for brine evaporation and extraction by solar energy, comprising a solar thermal collector (1), a brine feeding unit (2), a brine pond (3), a magma outlet (4); one end of the solar thermal collector (1) is provided with a brine inlet, and the other end thereof is provided with a brine outlet; the brine outlet of the solar thermal collector (1) is connected, through a pipeline, to the brine feeding unit (2) arranged above the brine pond (3). Brine heated by the solar thermal collector (1) is evaporated and crystallized in the brine pond (3), and returns, through the pipeline, to the solar thermal collector (1) to complete the circulation.

PAPER BALL-LIKE GRAPHENE MICROSPHERE, COMPOSITE MATERIAL THEREOF, AND PREPARATION METHOD THEREFOR

A paper ball-like graphene microsphere, a composite material thereof, and a preparation method therefor. Such paper ball-like graphene microspheres are obtained by chemically reducing graphene oxide microspheres to slowly remove oxygen-containing functional groups on the surface of the graphene oxide, avoiding volume expansion caused by rapid removal of the groups, thereby maintaining a tight bond between graphene sheets without separation; removing the small remaining amount of oxygen-containing functional groups by means of high temperature treatment, and repairing defect structures in the graphene oxide sheets, such that the graphene structure becomes perfect at an ultrahigh temperature (2500 to 3000 °C), thereby further improving the bonding ability between the graphene sheets in the microspheres and achieving a dense structure. The obtained paper ball-like graphene microspheres have good mechanical properties and elasticity, can effectively absorb impact, and have high stability and ...

MULTI-TYPE ENERGY STORAGE MULTI-LEVEL CONTROL METHOD

A multi-type energy storage multi-level control method, comprising: a fluctuation suppression strategy, an energy/power distribution strategy, and an economic operation strategy. The fluctuation suppression strategy is used to smoothen a microgrid original power curve, so as to obtain a microgrid grid-connected power curve and an energy storage total load curve; an energy storage charge-discharge distribution strategy based on a power-type energy storage charging state is used on the basis of a first-order filtering algorithm, to implement power distribution between energy-type energy storage and power-type energy storage; and an economic operation strategy based on full life cycle costs is used to implement power distribution inside the power-type energy storage (that is, power distribution between supercapacitor and flywheel energy storage), and an economic operation strategy based on per-kilowatt-hour electricity costs is used to implement power distribution inside the energy-type energy ...

IMAGE DISPLAY METHOD AND APPARATUS

Disclosed in embodiments of the present disclosure are a method and an apparatus used for image display. A specific embodiment of the present method comprises: determining a selected time point of a user performing adjustment of playback progress of a target video, the target video comprising a key frame set; determining a target key frame in the key frame set, a difference between a time point corresponding to the target key frame and the selected time point meeting a first pre-determined condition; on the basis of the target key frame, performing decoding of a video frame corresponding to the selected time point, obtaining a decoded video frame; displaying the decoded video frame in a first target display region. The present embodiment increases flexibility of video frame display, and helps increase user positioning and video frame processing effectiveness.

METHOD FOR SYNTHESIZING POLYEPOXY POLYMER

Disclosed is a method for synthesizing a polyepoxy polymer. The method comprises: under protection of nitrogen or argon gas, initiating, by a photosensitive free radical initiator under the condition of ultraviolet irradiation, sulfydryl-alkyne polymerization on a mixture of a dithiol compound and alkyne glycidyl ether or other alkyne-containing compounds to obtain the polyepoxy polymer. The quantity of the epoxy groups of the polyepoxy polymer in the present invention can be adjusted by changing the type of dimercapto monomers, the mixing ratio of the dimercapto monomers, and the mixing ratio of the alkyne glycidyl ether and the alkyne compounds of other types. The present invention has the advantages of fast reaction, simple and convenient process, easy post-treatment, large quantity of epoxy groups, controllable content and the like. The obtained polymer containing a large number of epoxy groups has wide application prospects in the fields of coatings, adhesives, printing ink, packaging ...

Water transport object evaluation method, device, equipment and medium

The invention discloses a water transport object evaluation method, device and equipment and a medium, and relates to the technical field of water transport object evaluation.The water transport object evaluation method comprises the following steps that an evaluation index set of a plurality of evaluation objects and historical data corresponding to the evaluation index set are obtained; wherein the evaluation object is an object corresponding to a water transport system; performing weight assignment processing on each evaluation index in the evaluation index set to obtain a weight value of each evaluation index; based on the historical data, scoring each evaluation index to obtain an initial score of each evaluation index; based on the initial score of each evaluation index and the weight value of each evaluation index, obtaining a comprehensive score of the plurality of evaluation objects; and determining a target object from the plurality of evaluation objects according to a preset ...

Enhanced strain connecting plate design method based on morphology optimization

The invention discloses a shape optimization-based reinforced strain connecting plate design method, which comprises the following steps of S1, determining an initial model of topological optimization, and setting a fixed area and a design area; s2, a design variable, a target function and a constraint condition of topological optimization are determined, the design variable is a shape change quantity of each sub-region in a design region, the target function is a load scale factor corresponding to a first-order buckling mode of the maximized tension yoke plate, and the constraint condition is that the distribution rate of beads is smaller than a limit value; s3, carrying out topological optimization on the initial model of the tension yoke plate; s4, reasonable reinforcement optimization design of the tension yoke plate is obtained in combination with the machining cost and difficulty; and S5, performing nonlinear buckling analysis on the reasonable reinforcement optimization design of ...

Cable safety detection method and system

The invention belongs to the technical field of cable safety detection, and particularly provides a cable safety detection method and system, and the method comprises the steps: obtaining cable electromagnetic characteristic data at a plurality of different positions on a cable and cable data with the same attribute; judging the validity of the electromagnetic characteristic data or the cable data of each cable, and removing invalid data to obtain valid data; and comparing the effective data with historical standard values of the corresponding types of data to obtain a difference value, and if the difference value exceeds a standard range, closing protection switches at the head end and the tail end of the cable to protect the cable. According to the detection scheme, the cable detection accuracy can be improved, the operation reliability of a cable detection system is improved, and the cable safety is ensured.

METHOD FOR PREPARING CONDUCTIVE GRAPHENE COMPOSITE FIBER

The embodiment of the present invention provides a graphene composite fiber comprising graphene sheets and a polymer for polymerizing the graphene sheets together. The polymer comprises one or both of hyperbranched polymer and polyvinyl alcohol. A mutually stacked layered structure is formed by the graphene sheets and the polymer, and the graphene sheets are regularly arranged along the axial direction of the graphene composite fiber. Graphene oxide is selected as a raw material in the method for preparing the graphene composite fiber, and the tensile strength of the graphene composite fiber is greatly improved. The composite fiber is provided with good toughness by adding the polymer. A rotatable coagulant is used in the spinning process, the tensile force of the gel fiber is increased, and the gel fiber is enabled to have high orientation and regularity, so that the strength of the obtained solid fiber is improved greatly. And the conductivity of graphene is recovered well in the final ...

Preparation method of graphene oxide fiber

Based on the fact that ammonium salt is easy to decompose into ammonium ions, the ammonium ions and oxygen-containing groups on graphene oxide sheet layers can form ionic crosslinking, strong interlayer acting force is provided, and the graphene oxide sheet layers can bear large tensile load so that the graphene oxide sheet layers can be arranged straightly. And then, on the basis of orientation arrangement of previous graphene oxide sheets, negative drafting is adopted to enable the graphene oxide to obtain a high-orientation and regular micro-wrinkle structure, so that the graphene oxide is endowed with excellent properties of high modulus and high toughness, and the graphene oxide has a wide application prospect.

Power transmission line transient waveform fault type identification method, equipment and medium

The invention relates to the technical field of fault type identification, in particular to a power transmission line transient waveform fault type identification method and device and a medium, and the method comprises the steps: importing an original data set of a power transmission line transient waveform fault, carrying out the screening, and extracting data meeting an experiment condition; calculating the time domain and frequency domain features of each data point for the data extracted after screening, storing the obtained feature data in a new feature data set, and enabling the feature data to correspond to the original data; adjusting parameters of minority class data in the feature data set by using a Smote algorithm, and expanding the minority class data to achieve balance with majority class data; and establishing a deep forest model, setting attributes of the deep forest model and window sizes and hyper-parameters of data slices, and importing the balanced feature data set ...

Method and device for monitoring positive and negative package anomalies of tubular belt of tubular belt conveyor and storage medium

The invention discloses a tubular belt positive and negative package abnormity monitoring method and device of a tubular belt conveyor and a storage medium, and relates to the field of tubular belt conveyors, and the method comprises the steps: obtaining an original tubular belt image shot by at least three groups of camera modules in a current period, and carrying out the image distortion correction, and obtaining a tubular belt image; identifying a pipe wrapping belt in all the tubular belt images, and calculating a target pipe twisting angle according to the position relation between the position of the pipe wrapping belt and the position of the camera module; inputting the tubular belt image into a positive and negative packet CNN prediction model, predicting the positive and negative packet state of the current tubular belt based on the positive and negative packet label state and the target torsion tube angle, and outputting a prediction result; and when the target pipe twisting angle ...

GRAPHENE COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR

A graphene composite material and a preparation method therefor. By adding a pleated spherical graphene oxide and a catalyst to a precursor, the pleated spherical graphene oxide is highly dispersed and gradually dissociated into single-layer graphene oxide sheets while a polycondensation reaction occurs, some esterified molecules can react with the hydroxyl group and carboxyl group on the surface of the graphene oxide sheets to form chemical bonds, and at the same time, the graphene oxide is thermally reduced, and finally a composite material composed of PET and graphene sheets grafted with PET on the surface is obtained. The present invention avoids the stacking of graphene oxide in the esterification stage, greatly saving costs and increasing the production efficiency. The graphene obtained has a good dispersibility in a polymer matrix, and the formation of the covalent bond between the two materials effectively increases the properties of the system such as the mechanical properties, ...

POSITION INFORMATION ALERT METHOD, DEVICE, AND SYSTEM

A position information alert method, device, and system. A designated server receives from a portable positioning device multiple position point information and positioning times corresponding to the position point information obtained at multiple pre-set times, generates a movement trail of the portable positioning device, and records the movement trail; then, when the designated server receives the current position point information transmitted by the portable positioning device, an alert is generated on the basis of the current position point information if the current position point corresponding to the current position point information is not on the recorded movement trail. A guardian holding a portable monitoring terminal can be ensured to know at any time whether the person being monitored and holding the portable positioning device is on a road that the person has not previously been on, and to have the safety information of the person being monitored, thereby enhancing user experience ...

METHOD AND DEVICE FOR USE IN PROVIDING DESKTOP

A method and apparatus for use in providing a desktop: a network device determining from an application message that is pushed by an application server one or more pieces of candidate desktop information corresponding to a mobile device (S21), and sending the one or more pieces of candidate desktop information to the mobile device (S22); the mobile device determining one or more pieces of desktop information from among the one or more pieces of candidate desktop information on the basis of a user profile model corresponding to a user (S11), wherein the one or more pieces of candidate desktop information comprise candidate desktop information provided by the corresponding network device, and displaying a current desktop of the mobile device according to the one or more pieces of desktop information (S12). Optimization and display of the mobile device desktop information is carried out on the basis of the user profile model, and thus the effect of displaying a "personalized" desktop may be ...

Gas drainage under suction hole packer

... 本实用新型公开了一种瓦斯抽放封孔器，属于矿井瓦斯防治技术领域。本实用新型包括第一抽放管、第二抽放管、橡胶管、螺旋叶片、进气管和注浆管，螺旋叶片的内壁上还设置有内螺纹，螺旋叶片下方的第一抽放管上设置有可拆卸的环形弹性垫片，第二抽放管的后端的外壁设有与螺旋叶片内壁上内螺纹相啮合的外螺纹。本实用新型通过橡胶管、螺旋叶片与橡胶管之间注浆液和螺旋叶片来快速的对钻孔进行封孔，还能克服封孔器封不严或煤体变形后漏气失效的问题，避免二次封孔工作量大进而增加施工成本，而且部分部件能够多次使用，节约成本，该封孔器结构简单，设计巧妙，制作成本低，封孔效果好，适用性强，安全可靠，经济和社会效益显著。 ...

Time sequence knowledge graph reasoning method based on specific query flow graph model

The invention provides a time sequence knowledge graph reasoning method based on a specific query flow graph model, and belongs to the technical field of time sequence knowledge graph reasoning. The method comprises the following steps: constructing a knowledge graph Q, extracting all triples containing entity nodes (eq, tq) to be searched from the knowledge graph Q, forming a sub-graph by the triples, sampling the sub-graph, and aggregating entity node information, time information relative to the entity nodes (eq, tq) to be searched and relation information among the nodes into a neighbor node u after sampling; setting a neighbor node set as a to-be-queried node set, and repeating sampling and aggregation processes to realize time sequence knowledge graph reasoning; and selecting the nodes of the last layer, calculating the node score of each node, and taking the node with the highest score as a reasoning result. The method is high in interpretability, a long path can be well predicted ...

High-elasticity graphene composite aerogel as well as preparation method and application thereof

According to the high-elastic graphene composite aerogel electromagnetic shielding material and the preparation method thereof, metal chloride multi-component components are intercalated into two-dimensional layers in a graphene aerogel wall, and the high entropy property of the multi-component metal chloride components is utilized, so that reinforced crosslinking of a soft carbon structure in graphene aerogel is further realized, and the electromagnetic shielding material is prepared. Furthermore, the graphene aerogel is endowed with a high-elasticity characteristic; besides, due to interlayer insertion of the multi-element metal chloride, the carrier concentration of a graphene sheet layer unit can be greatly improved, and remarkable reflection of electromagnetic waves is realized, so that the excellent electromagnetic shielding capability of the high-elastic graphene composite aerogel is realized.

METHOD FOR SYNTHESIZING HIGH-PURITY SILICON CARBIDE RAW MATERIAL AND APPLICATION THEREOF

The present invention relates to the technical field of crystal growth, and specifically relates to a method for synthesizing a high-purity silicon carbide raw material and an application thereof: by means of a three-step reaction technique, forming a high-purity particle wherein SiC coats Si, an outer layer being SiC and an inner layer being Si; coating Si at the interior of SiC, and when a high-purity SiC single crystal is grown by using the particle as a raw material, sublimating a surface layer of SiC, and then forming residual carbon; the silicon that coats the interior may continue to react with the residual carbon to form new SiC, thereby continuously maintaining the Si/C ratio in equilibrium; simultaneously reducing carbon particles may reduce the formation of carbon inclusions within SiC single crystals during the growth of the crystal. Thus, the problems of impurities and the defect of carbon inclusion during the growth of SiC single crystals are solved from the source of SiC ...

INDEPENDENT SELF-SUPPORTING GRAPHENE FILM AND PREPARATION METHOD THEREFOR

A preparation method for an independent self-supporting graphene film, the graphene film being obtained by means of filtration of graphene oxide into a film, solid phase transfer, chemical reduction and the like steps. The graphene film is formed by means of physical cross-linking of a single layer of oxidized/reduced graphene oxide. The graphene film has a thickness of 10-2000 atomic layers. The graphene oxide film has a small thickness and a large number of defects inside, so that it has good transparency and excellent flexibility. On the basis of the transfer film-forming method above, an independent self-supporting plicated graphene film having a nanoscale thickness is prepared by using a poor solvent and a special high temperature annealing process, and an independent self-supporting foamed graphene film having a nanoscale thickness is obtained by using a film-forming thickness and a special high temperature annealing process.

METHOD AND DEVICE FOR EXTRACTING MINERALS IN SALT LAKE WATER BY USING SOLAR ENERGY

A method for extracting the minerals in salt lake water by using solar energy, comprising the following steps: A) heating an organic heat carrier by using a solar energy collector (1); B) passing the heated organic heat carrier through a heat exchanger (3) to heat salt lake water; C) passing the heated salt lake water through an evaporation crystallization unit to separate minerals. A device for extracting the minerals in salt lake water by using solar energy, comprising the solar energy collector (1), the heat exchanger (3) and the evaporation crystallization unit; the evaporation crystallization unit comprises an evaporation crystallizer (5), a condenser (6), a condensate liquid tank (7) and pumps; the pumps comprise a heat exchanger pump (9), a circulating pump (10), a crystal slurry pump (11), a salt lake water feeding pump (12) and a vacuum pump (13); the heat exchanger (3) is provided with a heat carrier inlet (21), a heat carrier outlet (22), a salt lake water feed port (24) and ...

METHOD FOR PREPARING GRAPHENE AND COMPOSITE FILM THEREOF BASED ON I-SHAPED DIE

Disclosed are a method for preparing graphene and a composite film thereof based on an I-shaped die. In the method, a preparation device with an I-shaped die is used to prepare a graphene film and a graphene composite film. A tapered runner in the preparation device with a I-shaped die can effectively increase the acting force of a flow field to a graphene sheet, is beneficial for forming a regularly-orientated structure of a graphene dispersion system, and achieves the continuous preparation of a large area of graphene film. The thickness of the prepared graphene film is uniform. The continuous structure stacked layer by layer is highly ordered with less defects, which is beneficial for improving the conductivity of the graphene film material to heat and electricity and excellent mechanical performance, and is also beneficial for combination of graphene with various object materials. The prepared graphene film is beneficial for improving the conductivity of the graphene film material to ...

DATA SHARD STORAGE METHOD, DEVICE AND SYSTEM

The present application relates to the field of distributed storage, and in particular relates to distributed sharding storage technology. The data shard storage method in a distributed storage system comprises: determining M data nodes required for storing data to be stored, acquiring N copies of the data to be stored, and performing sharding on each copy among the N copies to form X data shards according to the same sharding mode; and then, storing the data to be stored in the M storage nodes, that is, respectively storing N copies of each data shard among the X data shards into the N storage nodes, so that the number of data shards with data shard copies being stored in the same N storage nodes is P or P+1, wherein P is an integer quotient of X divided by (I). Provided is a distributed data shard storage method. Thus, the data availability and the efficiency of data recovery when a node fault occurs are improved.

Vehicle floor console assembly and vehicle

The invention relates to a vehicle floor console assembly and a vehicle. The vehicle floor console assembly is used for being arranged on the rear row of a vehicle and comprises a rear trim panel, a front trim panel and a rear trim panel, wherein the rear trim panel is provided with an inner cavity, an opening leading to the inner cavity and a cover part used for closing the opening; the guide rail is arranged in the inner cavity; the support comprises a body and a supporting part, the body is movably arranged on the guide rail, and the supporting part is arranged on the body and can move relative to the body; the table plate is connected with the cover part and is pivotally connected with the bracket, the table plate is moved into the inner cavity through the opening to enter a storage state when the bracket moves along the guide rail in the first direction, or the table plate is moved out of the inner cavity through the opening to enter an opening state when the bracket moves along the ...

Preparation equipment of medium element water-soluble fertilizer for preventing and treating berry cracking

The invention belongs to the technical field of preparation of water-soluble fertilizers, and particularly relates to preparation equipment of a medium-element water-soluble fertilizer for preventing and treating berry cracking, aiming at the problem that the concentration of various substances needs to be adjusted in advance, the following scheme is provided: the preparation equipment comprises a bottom plate and a bottom cylinder fixedly connected to the outer wall of the top of the bottom plate, a top plate is fixedly connected to the outer wall of the top of the bottom barrel, a plurality of storage barrels distributed at equal intervals are arranged on the outer wall of the top of the top plate, detection mechanisms used for detecting the substance concentration are arranged on the inner walls of the bottoms of the storage barrels, and a plurality of discharging pipes distributed at equal intervals are fixedly connected between the top and the outer wall of the bottom of the top plate ...

Photovoltaic module dust deposition monitoring method and device, photovoltaic power station and electronic equipment

The invention discloses a photovoltaic module dust deposition monitoring method and device, a photovoltaic power station and electronic equipment. The method comprises the steps that candidate photovoltaic strings are determined according to current data of the photovoltaic strings, and the current data are used for representing the situation that currents output by the photovoltaic strings change along with time; according to the dust deposition source type corresponding to the power station where the candidate photovoltaic string is located, a target association relationship corresponding to the dust deposition source type is determined, and the target association relationship is used for representing the association relationship between the current data of the photovoltaic string and the weather data; and under the condition that the incidence relation between the current data of the candidate photovoltaic string and the historical weather data in the statistical period of the current ...

APPLICATION PROGRAM TESTING METHOD AND DEVICE

Disclosed in the present application are an application program testing method and device, relating to the field of software testing techniques. The main purpose of this application lies in that: when an existing security type electronic commerce product is manually tested in an application program developed in a WeChat applet, as a large amount of data such as the identification card number, the age, the premium, and the insured product needs to be input, manual-only testing cannot satisfy the iteration speed of electronic commerce products, and a large number of human resources may also be needed, thereby reducing the testing effects. The main technical solution: determining, in a testing environment, whether an attribute of a user interface (UI) component element exists in a health insurance application program, wherein the UI component element is an object for executing different UI component programs in the health insurance application program according to service flows; if so, running ...

METHOD FOR FABRICATING GRAPHENE FILM POSITIVE ELECTRODE MATERIAL, AND APPLICATION THEREOF IN ALUMINUM-ION BATTERY

Provided is a method for fabricating a graphene film positive electrode material; a graphene oxide solution is applied to a substrate; after drying, the substrate is removed; after restoration, a graphene film having ultra-high conductivity is obtained; also provided is an application of the described graphene film in an aluminum-ion battery; stable battery performance across a very wide temperature range of minus 40 degrees Celsius to 120 degrees Celsius is achieved, electrochemical performance remains intact after 10,000 bends, and 91% performance is maintained after 250,000 cycles. Operation is simple and the production method is continuous and controllable, and is suitable for use in large-scale production while having the advantage of low cost; the high power density of the aluminum-ion battery is ensured while its energy density is increased, and it can be used in the field of energy storage materials and devices which are required to have high safety, high power density, long life ...

PREPARATION METHOD FOR USE WITH GRAPHENE-BASED POROUS CARBON NETWORK

A preparation method for use with a graphene-based porous carbon network. The method comprises: firstly, preparing and obtaining graphene oxide microspheres by means of a spray drying method by using a single-layer graphene oxide dispersion liquid; then uniformly mixing the graphene oxide microspheres with a biomass carbon source and an activator; processing at a high temperature within a limited space, and then obtaining a porous carbon network. The graphene-based porous carbon network has abundant pore structures, has a large specific surface area and pore volume, and is low density; the present invention may be used in the fields of air purification, water treatment, wave-absorbtion materials, electrochemical materials and the like.

Training device for operating scraper bucket and control method

The invention provides a training device and a control method for operation of a scraper bucket, the training device comprises an operation platform, a control cabinet and a teaching device, the operation platform is connected with the control cabinet through a system network, and the control cabinet is connected with the teaching device; and when the operation platform receives an instruction triggered by a user for executing the target function, searching a function instruction corresponding to the target function in a preset function instruction set, and sending the function instruction to the control cabinet through the system network, so that the control cabinet controls the teaching device to execute an operation corresponding to the function instruction according to the function instruction. State parameters of all parts in the teaching device are collected and sent to the operation platform; wherein the operation platform displays state parameters of each component in the teaching ...

Memory device and manufacturing method thereof

According to the memory device and the manufacturing method thereof provided by the invention, deposition of a hard mask layer is omitted in a gate etching process, and a hard mask layer deposition process is saved under the condition that the performance of the memory device is not changed by replacing a photoresist type adopted in a gate photoetching process, increasing the thickness of the photoresist and optimizing parameters of the gate etching process, so that the manufacturing cost of the memory device is reduced. The production cost is saved. Furthermore, hard mask layer deposition is omitted in the gate etching process, so that the boundary of the gate in the peripheral circuit region can be overlapped with the boundary of the memory cell region, the STI width around the memory cell array is reduced, the area of the memory cell array is effectively reduced, and the competitiveness of platform products is improved.

Control system of switch equipment and control method thereof

The invention discloses a control system and a control method of switch equipment, and relates to the technical field of power equipment, and the control system comprises a centralized control operation management unit; a two-dimensional code display unit; the centralized monitoring unit comprises a camera and a monitoring module, the monitoring module obtains the two-dimensional code of the two-dimensional code display unit through the camera and analyzes the two-dimensional code to obtain the actual execution state of the disconnecting link and the circuit breaker, and the monitoring module sends the actual execution state to the centralized control operation management unit; and the centralized control operation management unit compares the actual execution state of the disconnecting link and the circuit breaker with the ideal execution state of the disconnecting link and the circuit breaker, and if the actual execution state is consistent with the ideal execution state, an operation ...

Pouring mold

The invention relates to the technical field of epoxy resin sheet manufacturing, in particular to a pouring mold which comprises a mold body and a negative pressure generating unit, a cavity and a liquid storage cavity which are communicated with each other are formed in the mold body in the vertical direction, and the negative pressure generating unit is communicated with the cavity so as to generate negative pressure in the cavity. The mold has the advantages that the cavity can maintain the shape of epoxy resin and help the epoxy resin to be formed; the liquid storage cavity can store liquefied epoxy resin, and when the negative pressure generating unit generates negative pressure on the mold cavity, the epoxy resin in the liquid storage cavity can be adsorbed into the mold cavity so as to help the epoxy resin to be formed and reduce bubbles generated during pouring.

POLYIMIDE-BASED COMPOSITE CARBON FILM WITH HIGH THERMAL CONDUCTIVITY AND PREPARATION METHOD THEREFOR

Disclosed in the present invention are a polyimide-based composite carbon film with high thermal conductivity and a preparation method therefor. The method comprises: uniformly coating the surface of a polyimide-based carbon film with an aqueous graphene oxide solution, and then covering same with another polyimide-based carbon film that is uniformly coated with the aqueous graphene oxide solution; repeating the operation; and after drying, bonding the polyimide-based carbon films by means of graphene oxide to form a thick film. By means of further low-temperature hot-pressing, the polyimide-based carbon films are bonded more tightly; and finally, a polyimide-based thick carbon film with high thermal conductivity can be obtained by repairing defects by means of low-temperature heating pre-reduction and high-temperature and high-pressure thermal treatment. The thickness of the polyimide-based thick carbon film with high thermal conductivity is greater than 100 μm, and the in-plane thermal ...

COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR

A composite material and a preparation method therefor. The composite material can improve the heat dissipation capacity of a heat dissipation material to a certain extent, and is used for solving the problem of the limited heat dissipation performance of the heat dissipation material. The composite material comprises at least two heat conduction particles, graphene and an organic matrix, wherein the at least two heat conduction particles are dispersed in the organic matrix; the surface of the heat conduction particles are covered with the graphene; and the at least two heat conduction particles are bridged by means of the graphene.

LARGE-SIZE HIGH-PURITY SILICON CARBIDE SINGLE CRYSTAL, SUBSTRATE, PREPARATION METHOD THEREFOR AND PREPARATION DEVICE THEREOF

The present application relates to the fields of silicon carbide single crystals and substrates, and disclosed thereby are a large-size high-purity silicon carbide single crystal, a substrate, a preparation method therefor, and a preparation device thereof. By means of improving the thermal field distribution of a PVT method, the present application changes the traditional method of producing an axial temperature gradient by means of dissipating heat from upper insulation holes, and instead uses a crucible having different wall thicknesses and an insulation structure having different thicknesses to produce an axial temperature gradient, while changing an insulation structure at an upper side of the crucible, thereby producing a thermal field structure having uniform radial temperature distribution; in particular, the radial distribution of the thermal field at the interior of a large-size crucible may be caused to be uniform; since electroactive impurity elements grow and enter a crystal ...

INTERFERENCE PROCESSING METHOD, APPARATUS AND SYSTEM, AND STORAGE MEDIUM

Disclosed are an interference processing method, apparatus and system, and a storage medium, belonging to the technical field of communications. The method comprises: determining a downlink reference signal receiving power (RSRP) boundary value of a cell; receiving a downlink RSRP measurement value reported by a user equipment (UE); and when the downlink RSRP measurement value is less than the downlink RSRP boundary value, migrating the UE out of the cell.

Optimization design method of breaker nozzle

The invention discloses an optimal design method for a nozzle of a circuit breaker, and relates to the technical field of high-voltage circuit breakers. According to the method, the circuit breaker model is constructed, the first airflow density accurate value of the circuit breaker nozzle area is calculated based on the preset circuit breaker nozzle optimization parameter and the preset circuit breaker nozzle parameter constraint, and then the circuit breaker nozzle optimization model is constructed based on the nozzle parameter sample and the first airflow density accurate value. The breaker nozzle optimization model is optimized by taking preset breaker nozzle parameter constraints as constraint conditions and taking maximization of a first airflow density predicted value of a nozzle area as an optimization target, so that optimal nozzle parameters can be quickly determined, optimal design of a breaker nozzle is realized, and the optimal design efficiency of the breaker nozzle is improved ...

Intelligent monitoring system and method for new energy wind power plant

The invention provides an intelligent monitoring system and method for a new energy wind power plant, and relates to the technical field of wind power plant monitoring, and the system comprises a parameter storage unit, a parameter acquisition unit, a feature generation unit, a region generation unit, an online monitoring unit and an online operation and maintenance unit. The parameter storage unit is used for acquiring historical fault alarm data; the parameter acquisition unit is used for acquiring running state data; the feature generation unit is used for eliminating abnormal state data in the operation state data and generating a fault feature matrix; the region generation unit is used for obtaining a suspected fault region of the wind power plant; the online monitoring unit is used for determining a final fault area; and the online operation and maintenance unit is used for performing online operation and maintenance. The intelligent monitoring system of the new energy wind power ...

Pretreatment equipment for neodymium iron boron rare earth permanent magnet material

The invention relates to the field of neodymium iron boron rare earth permanent magnet material recovery, in particular to pretreatment equipment for a neodymium iron boron rare earth permanent magnet material. The pretreatment equipment for the neodymium-iron-boron rare earth permanent magnet material can prevent fragments of the neodymium-iron-boron rare earth permanent magnet material from being adhered. Pretreatment equipment for neodymium iron boron rare earth permanent magnet materials comprises a base, a tank body, a material distributing plate, discharging pipes, valves and the like, the tank body is fixedly connected to the base, the material distributing plate is fixedly connected to the upper portion of the tank body, the discharging pipes are installed on the two sides of the bottom of the tank body and communicated with the tank body, and the valves are installed on the discharging pipes. By arranging the dispersing plate, when the dispersing plate rotates along with the rotating ...

Livestock and poultry breeding waterway and intelligent production management system thereof

The invention discloses a livestock and poultry breeding waterway, and belongs to the technical field of automation equipment, the livestock and poultry breeding waterway comprises a water tank, the water tank is communicated with a water pump, the water pump is communicated with a water drinking main pipeline, the water drinking main pipeline is connected with a plurality of rows of water drinking pipelines in parallel, and a water diversion pipeline comprises water drinking branches communicated with the water drinking main pipeline. A plurality of layers of drinking water lines are connected to the drinking water branch in parallel, the drinking water lines and the drinking water branch are communicated through a double-pipeline structure, the tail end of the drinking water line of the same drinking water pipeline is connected with a sewage pipe, and a sewage switch is installed at the end, close to the sewage pipe, of the drinking water line. The drinking water line close to the sewage ...

Cable accessory construction management and control system and method

The invention discloses a cable accessory construction management and control system and method, and the system comprises the steps: collecting construction operation videos, capturing key nodes and supplementary nodes, collecting cable accessory construction videos, and carrying out the construction operation diagnosis, node construction quality diagnosis and construction potential safety hazard diagnosis in real time through the collected videos and captured pictures. Therefore, construction abnormity can be known in the first time, cable accessory construction management and control are realized, and quality control from a defect source is facilitated.

Disassembling and assembling structure and soft box

The invention relates to the technical field of photography, and provides a disassembly and assembly structure and a soft box, and the disassembly and assembly structure comprises a chuck assembly, a transmission assembly and a rotating assembly. The chuck assembly is used for bearing the transmission assembly and the rotating assembly; the transmission assembly is in transmission connection with the chuck assembly, one end of the rotating assembly is fixedly connected with the chuck assembly, and the other end of the rotating assembly is hinged to the supporting rod. The transmission assembly drives the rotating assembly to do reciprocating motion in the axial direction of the chuck assembly and meanwhile drives the rotating assembly to do reciprocating motion in the radial direction of the chuck assembly so that the supporting rod can be unfolded or folded, and therefore the soft box can be unfolded or folded. Due to the design of the transmission assembly, the rotating assembly and the ...

Risk prediction method, related device, electronic equipment and storage medium

The invention discloses a risk prediction method, a related device, electronic equipment and a storage medium. The risk prediction method comprises the steps of performing analysis based on a first detection value of a to-be-detected object in a plurality of indexes and a second detection value of a detected object in a plurality of indexes to obtain a first risk score of the to-be-detected object; predicting the first risk score based on a first risk prediction model to obtain a suspected risk type of the to-be-detected object; generating a risk evaluation questionnaire based on the suspected risk type, and obtaining a first score value of related personnel of the to-be-tested object for each question in the risk evaluation questionnaire; all the questions are regarded as different indexes, analysis is carried out based on the first detection value, the second detection value, the first score value of all the questions and the second score value of the detected object in all the questions ...

GRAPHENE FIBER NON-WOVEN FABRIC AND PREPARATION METHOD THEREFOR

Disclosed are a graphene fiber non-woven fabric and a preparation method therefor. The non-woven fabric is obtained by filtering and depositing a dispersion of graphene short fibers through a filter net and drying and reducing same, so that the structural unit of the non-woven fabric is graphene short fibers that are stacked in a disorderly manner and bonded to each other, and the fibers are overlapped to form a large number of holes through which a liquid or a gas can pass. The graphene fiber non-woven fabric has a relatively good mechanical strength and tenacity, and is completely composed of graphene fibers, and does not contain a high-molecular material as a skeleton or an adhesive, etc. The electricity and heat conducting performances of a network structure formed by overlapping the graphene fibers and being reduced are excellent. The non-woven fabric can be used as a multifunctional high-performance fabric.

METHOD FOR PREPARING HIGHLY PURE SEMI-INSULATING SILICON CARBIDE SINGLE CRYSTAL

Disclosed is a method for preparing a highly pure semi-insulating silicon carbide single crystal, belonging to the technical field of growing crystals, wherein by introducing a Group IVA element with a greater atomic size into a raw material while reducing the electrically active impurities therein, by using a doped SiC raw material for growing a crystal during the process of the growth of the crystal, and by introducing an appropriate amount of a Group IV element into a SiC crystal, the concentration of intrinsic point defects in the crystal is increased, full compensation for shallow energy level impurities is achieved, and the semi-insulating properties of the SiC crystal are achieved. The growth of the highly pure semi-insulating SiC crystal is achieved without rapid cooling, thereby decreasing stresses in the crystal, and improving the quality of the crystal; furthermore, by controlling the doping concentration, the concentration of intrinsic point defects introduced into the crystal ...

ELECTRICAL COMPONENT, CIRCUIT BOARD, AND SWITCHING POWER SUPPLY

The present application provides an electrical component, a circuit board, and a switching power supply. The electrical component comprises a first magnetic core and a second magnetic core opposite to each other, the first magnetic core and the second magnetic core define a space for accommodating a winding, and the first magnetic core and the second magnetic core are further used for limiting magnetic induction lines. A third magnetic core located in the space defined by the first magnetic core and the second magnetic core is further comprised, and the third magnetic core is used for the winding to wind. The third magnetic core is fixedly connected to the first magnetic core and the second magnetic core separately, and at least one magnetic core in the first magnetic core and/or the second magnetic core is provided with an air gap. In the above technical solution, the air gap is provided in the first magnetic core or the second magnetic core, and there is no air gap on the third magnetic ...

Device for percutaneous reduction and fixation of distal femur comminuted fracture

The utility model discloses a device for percutaneous reduction and fixing of distal femur comminuted fracture, which comprises a pair of parallel pull rod and arc-shaped dial, threads are arranged at two ends of the surface of the pull rod, nuts are sleeved on the surfaces of the outer ends of the threads, and two ends of the pull rod respectively penetrate through the center of the surface of the arc-shaped dial. An arc-shaped sliding groove is formed in the surface of the arc-shaped dial, a sliding block is embedded in the arc-shaped sliding groove, a sleeve is connected to one side of the sliding block, a vertical groove hole is formed in the sleeve, and a kirschner wire is connected into the vertical groove hole in a sleeved mode. According to the utility model, the distal femur is accurately corrected to shorten the displacement malformation according to the preoperative measurement length, and the X-ray radiation damage caused by repeated reduction during the operation can be reduced ...

Flash memory layout, flash memory and manufacturing method thereof

The invention provides a flash memory layout, a flash memory and a manufacturing method thereof, and the layout comprises an active region layout layer which comprises a plurality of active regions arranged in parallel along a first direction, and the active regions comprise effective active regions and virtual active regions; the first floating gate layout layer comprises a plurality of first floating gate patterns which are arranged in parallel along a second direction; the second floating gate layout layer comprises a plurality of second floating gate graphs which are arranged in parallel in the second direction, the second floating gate graphs are oppositely arranged on the two sides of the connecting areas in pairs, in each connecting area, the second floating gate graphs are arranged on the first floating gate graphs in an interlaced mode, and the adjacent first floating gate graphs are provided with the second floating gate graphs in different connecting areas; the control gate contact ...

L-2-HYDROXYGLUTARATE BIOSENSOR BASED ON SPECIFIC TRANSCRIPTIONAL REGULATION FACTOR, AND USE THEREOF

Disclosed are a specific transcriptional regulation factor LhgR in response to L-2-hydroxyglutarate (L-2-HG), and an L-2-hydroxyglutarate biosensor based on the transcriptional regulation factor, wherein the biosensor is a fusion protein formed by means of linearly connecting a cyan fluorescent protein mTFP, an L-2-HG specific transcriptional regulation factor LhgR, and a yellow fluorescent protein Venus, and comprises three kinds of biosensors, i.e., an L-2-HG biosensor LHGFR0N0C, an L-2-HG biosensor LHGFR0N3C, and an L-2-HG biosensor LHGFR0N7C. Also disclosed in the present invention is the use of the L-2-HG biosensors in the detection of L-2-HG-containing biological samples, the real-time detection of an intracellular L-2-HG concentration of bacteria, and the detection of intracellular L-2-HG in human body cells. Proven by experiments, the biosensor disclosed in the present invention can achieve high-specificity, sensitive and accurate detection of L-2-HG, can be used for assaying dynamic ...

SOLAR EVAPORATION BRINE EXTRACTION DEVICE

A solar evaporation brine extraction device, comprising a solar collector (1), a heat exchanger (2), a brine pond (3), a brine feed port (7), and a crystal mush outlet (8). One end of the solar collector (1) is provided with a heat carrier inlet, and the other end is provided with a heat carrier outlet. The heat carrier outlet of the solar collector (1) is connected to the heat exchanger (2) in the brine pond (3) by means of a pipeline. A heat carrier heated by the solar collector (1) warms up brine in the brine pond (3) by means of the heat exchanger (2). The cooled heat carrier flows back to the solar collector (1) by means the pipeline to complete circulation.

Absorption core body, hygienic product and preparation device and preparation method of absorption core body

The invention relates to an absorption core body, a hygienic product and a preparation device and method of the absorption core body, the absorption core body comprises a composite fiber net, the composite fiber net is formed by compositing first hydrophilic fibers, second hydrophilic fibers and third bonding fibers, the first hydrophilic fibers are processed and formed through a melt-blowing technology, and the second hydrophilic fibers are processed and formed through a melt-blowing technology; the second hydrophilic fiber and the third adhesive fiber are fed into the leading-in area for compounding through the airflow channel after being opened, carded and lapped, are reinforced and sterilized through the drum-type steam net spraying mechanism, and are combined with disinfection to prepare the sanitary absorption core body. The first hydrophilic fibers are superfine fibers, large in specific surface area and good in water absorption performance and serve as absorption materials of the ...

SELF-FUSION GRAPHENE FIBER AND PREPARATION METHOD THEREFOR

Disclosed in the present invention are a self-fusion graphene fiber and a preparation method therefor. Dried oxidized graphene fibers are immersed in solvents; after swelling, the fibers are picked out and overlapped together; after being dried, the oxidized graphene fibers are fused and bonded together, and then are further reduced to obtain self-fusion graphene fibers. The entire self-fusion process may be quickly completed within one minute without adding additional binders; the operation is simple and time is saved; the process is environmentally friendly; the bond strength is high, and the quality performance of the graphene fibers themselves, such as in mechanical strength and conductivity, may be maintained. The present invention has great research and application value for further preparation of excellent two-dimensional graphene fiber fabrics or three-dimensional network block materials.

FIRE-EXTINGUISHING COMPOSITION

A fire-extinguishing composition, the fire-extinguishing composition being composed of the following substances by mass percentage: an aromatic organic acid compound 20%-90%, and a sugar compound 10%-80%; the fire-extinguishing composition uses the high temperature of pyrotechnic reagent combustion such that the fire-extinguishing composition produces a large amount of a fire-extinguishing substance. At a high temperature, the aromatic organic acid compound and the sugar compound may absorb heat, sublimate, decompose, react with each other, and release a large volume of the fire-extinguishing substance so as to extinguish a fire. The fire-extinguishing composition compensates for the loss in performance of an aerosol generating agent caused by a general cooling layer, and enhances the fire-extinguishing performance of a fire-extinguishing product as a whole, while reducing the temperature of a nozzle of the product; the fire-extinguishing composition has a low sediment hygroscopicity and ...

DOPPLER FREQUENCY OFFSET ESTIMATION METHOD AND DEVICE BASED ON MILLIMETER WAVE MIMO SYSTEM

Embodiments of the present application provide a Doppler frequency offset estimation method and device based on a millimeter wave MIMO system. The method comprises: building a maximum likelihood estimation model for a Doppler frequency offset according to signals received by a receiving end in a millimeter wave MIMO system; determining a solution expression of the Doppler frequency offset according to the maximum likelihood estimation model; and estimating the Doppler frequency offset according to the solution expression. Compared with the prior art, by applying the embodiments of the present application, the Doppler frequency offset of the millimeter wave MIMO system can be estimated.

USB TYPE-C INTERFACE

The present invention relates to the field of electronic products. A USB Type-C interface, said USB Type-C interface comprising: an upper row of signal terminals (1), a lower row of signal terminals (2) and a grounded metal sheet (3), wherein the upper row of signal terminals (1) are disposed above the grounded metal sheet (3), and the lower row of signal terminals (2) are disposed below the grounded metal sheet (3). The USB Type-C interface eliminates a metal housing, therefore, when an antenna is provided above the USB Type-C interface, neither the connection function of the USB Type-C interface nor the signal receptivity of the antenna is affected.

Hydraulic pumping unit

The invention relates to the technical field of oil pumping units, in particular to a hydraulic oil pumping unit which comprises a second support, a second roller, a second hydraulic push rod, a third traction rope and a traction plate, the traction plate is fixedly connected with an oil pumping rod, the traction plate is provided with a brake mechanism, the brake mechanism comprises a first support, the first support is rotationally connected with a first rotating shaft, and the first rotating shaft is fixedly connected with a first roller. A first traction rope and a second traction rope are wound around the first roller, the first support is fixedly connected with a buffer sleeve, the buffer sleeve is rotationally connected with a rotary disc, the rotary disc is slidably connected with a first sliding rod fixedly connected with the second traction rope, and a first buffer disc fixedly connected with the first sliding rod is slidably connected into the buffer sleeve and provided with ...

Slope soil curing agent for tailing storage yard in southern rare earth mining area

The invention discloses a soil curing agent for a side slope of a tailing storage yard in a southern rare earth mining area. The soil curing agent mainly aims at granite weathered products subjected to ore leaching treatment and soil formed on the granite weathered products. The curing agent is prepared from water glass, disodium hydrogen phosphate, polyacrylamide, hydroxymethyl cellulose and water according to a certain proportion. The liquid injection agent is injected into a soil body by digging a seepage ditch or punching a liquid injection hole in a side slope of a tailing storage yard in a rare earth mining area, so that the anti-shearing capability of the soil body can be quickly improved, the stability of the side slope is improved, and the occurrence risk of landslide is reduced. Through an indoor simulation test, the soil cohesive force and the internal friction angle are respectively improved by 23.6% and 11.7% compared with a contrast, and the anti-shearing capability is obviously ...

Screw connecting device for precast concrete underground diaphragm wall

The invention discloses a screw connecting device for a precast concrete underground diaphragm wall, and aims to provide the screw connecting device for the precast concrete underground diaphragm wall, which can quickly and reliably connect all precast wall bodies in the precast concrete underground diaphragm wall into a whole. Therefore, the integrity and the strength of the precast concrete underground diaphragm wall are ensured. The device comprises a top connector, the top connector comprises an upper metal mold box embedded in the top of a prefabricated wall, and the upper metal mold box comprises an upper box body and a bolt upper via hole communicating the upper box body with the upper end of the prefabricated wall; the bottom connector comprises a lower metal mold box embedded in the bottom of the prefabricated wall body, and the lower metal mold box comprises a lower box body and a bolt lower via hole communicating the lower box body with the lower end of the prefabricated wall ...

Expandable splicing manufacturing method of Ka-Ku dual-polarized microstrip antenna assembly unit

The invention discloses an extensible splicing manufacturing method of a Ka-Ku dual-polarized microstrip antenna assembly unit, and relates to the technical field of radar electronic antenna feeder subsystem manufacturing, and the method comprises the following steps: 1, processing a plurality of grooves in a plurality of shells, and dispensing soldering paste in the grooves of the shells; step 2, a plurality of groups of Ka frequency band elastic connectors and a plurality of groups of Ku frequency band elastic connectors are respectively installed in a plurality of grooves of the shell through a transfer tool; 3, interconnection of the Ka frequency band elastic connector and the shell and interconnection of the Ku frequency band elastic connector and the shell are completed through low-temperature welding; 4, laying conductive adhesive films on the plurality of antenna microstrip plates, and installing positioning pins on the plurality of shells; according to the invention, through elastic ...

Support adjustment time determination method and device and electronic equipment

The invention discloses a bracket adjustment time determination method and device and electronic equipment. The method comprises the following steps: determining the total irradiance of a horizontal plane of each third time period according to weather forecast data of each second time period in a first time period and historical weather data corresponding to the first time period; a first target model is adopted to analyze the horizontal plane total irradiance input of each third time period, and horizontal plane direct irradiance and horizontal plane scattering irradiance of each third time period are obtained; according to the horizontal plane direct irradiance and the horizontal plane scattering irradiance of each third time period, determining the total radiation quantity of the inclined plane of each third time period; and determining a target time period according to the total radiation quantity of the inclined plane. The technical problem that the power generation efficiency of a ...

Notching drill rod special for scour prevention and pressure relief

The invention relates to the technical field of grooving drill rods, in particular to an anti-impact pressure relief special grooving drill rod which comprises a connecting handle, a rod body and a mounting seat which are sequentially arranged from top to bottom in the vertical direction of the drill rod during working, and through holes are formed in the connecting handle, the rod body and the mounting seat in a penetrating mode. A spirally-distributed notch groove is formed in the rod body, a plurality of upwards-inclined leakage holes distributed along the circumference are formed in the notch groove, and the leakage holes are communicated with the through hole. The connecting handle is used for connecting the rod body and drilling machine surface equipment, the mounting seat is used for connecting the rod body and drilling and grinding equipment or a bottom hole device or a drill bit, the rod body is connected with the connecting handle and the mounting seat in a bearing mode, the notch ...

GRAPHENE FIBER AND PREPARATION METHOD THEREFOR

A graphene fiber and a preparation method therefor. The graphine fiber is a composite fiber of a metallic nanowire-doped graphene fiber. The main components of the composite fiber are graphene and metallic nanowires, where the metallic nanowires account for a mass ratio between 0.1% and 50%, the graphene is in a sheet morphology, and the metallic nanowires and the graphene sheets at the same time are arranged in parallel along the axial direction of the graphene fiber. The metallic nanowire-doped graphene fiber is a novel high-performance multifunctional fiber material, implements greatly increased fiber conductivity by metallic nanowire doping, while at the same time presents a great tensile strength and excellent toughness, and has a strong potential application value in multiple fields, such as serving as a lightweight flexible lead wire.

Deep foundation pit permanent and temporary combined supporting structure and construction method thereof

The invention discloses a deep foundation pit permanent and temporary combined supporting structure which comprises fender posts, top beams, specially-made waist beam joints and specially-made concrete supporting joints, the specially-made waist beam joints are provided with externally-laid waterproof coiled materials, internally-preset side wall vertical steel bars and steel bar connectors, and water stop steel plates are arranged on the upper portions and the lower portions of the specially-made waist beam joints; floor slab horizontal steel bars are arranged in the specially-made concrete supporting nodes, steel bar connectors are arranged on the specially-made concrete supporting nodes, and water stop steel plates are arranged on the left and right; when a main body structure is constructed, the main body side wall reinforcing steel bars and the waist beam reinforcing steel bars can be connected through the reinforcing steel bar connectors, the waterproof coiled materials are in lap ...

Crawler crane pull rod control method, controller and crawler crane

The invention discloses a control method and a controller for a pull rod of a crawler crane and the crawler crane. The control method comprises the steps that the initial movement speed of the oil cylinder mechanism and the initial movement speed of the luffing mechanism are determined respectively; the extension length of the oil cylinder mechanism is obtained every preset time, and the theoretical extension length of the oil cylinder mechanism is determined; determining a first target current and a first movement speed corresponding to the first target current according to the initial movement speed of the oil cylinder mechanism, the extension length of the oil cylinder mechanism and the theoretical extension length of the oil cylinder mechanism; the initial movement speed of the oil cylinder mechanism and the initial movement speed of the luffing mechanism are combined, and the second movement speed is determined according to the first movement speed; and respectively controlling the ...