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112results about How to "Make up for the vacancy" patented technology

Device and method for testing plane stress state of coal rock sheet under thermal-mechanical coupling condition

The invention provides a device and method for testing a coal rock plane sheet under the thermal-mechanical coupling condition and belongs to the technical field of rock mass mechanics and engineering. The device is characterized in that the device is composed of an axial stress restraint system 1, a plane loading system 2, a bottom temperature control and supporting adjusting assembly system 3, an acoustic emission monitoring system 4, a visual monitoring system 5 and a stress-deformation testing system 6; the mechanics characteristic test of a coal rock plane coal rock sheet test piece in the plane stress state under the thermal-mechanical coupling condition can be stimulated, crack initiation and extension characteristics of cracks of the plane coal rock sheet test piece under the thermal-mechanical coupling condition are monitored in the whole course and formation and extension mechanisms of the cracks under the thermal-mechanical coupling condition are observed, analyzed and grasped through the acoustic emission monitoring system 4, the visual monitoring system 5 and the stress-deformation testing system, and the theoretic foundation and the experimental basis are provided for fracturing of the plane coal rock sheet test piece under the thermal-mechanical coupling condition.
Owner:TAIYUAN UNIV OF TECH

Multifunctional cam mechanism teaching tool

The invention relates to a multifunctional cam teaching tool and belongs to the field of teaching appliances. The multifunctional cam mechanism teaching tool is mainly composed of a slide block, a slide rail, a slide block extending plate, a slide rail bracket, a roller driven piece, a guide rod, a sliding chute rod, a cam, a main shaft, a base, a screw knob and a clamp. The slide rail with baffles arranged at two ends thereof is provided with the slide block, and a long baffle is arranged at one side of the slide rail. The lower end of the slide rail bracket is fixedly connected to the clamp, and the clamp is sleeved on the main shaft and is wholly fixed on the base. The slide block extending plate is fixedly connected to the upper end of the slide block, and a rectangular through groove and a round through groove are formed in the slide block extending plate. A shaft sleeve is arranged at one end of the sliding chute rod and is in clearance fit with the main shaft. The cam is fixed on the main shaft through a mounting hole. The multifunctional cam mechanism teaching tool realizes integrated demonstration of most cam teaching contents, meanwhile can lighten teaching burden of a teacher and improve teaching effects efficiently as innovative functions for demonstrating an adjustable driven piece, an adjustable and readable eccentric distance, an inversion-method designed cam profile principle and the like are added, and makes up the vacancy of the existing integrated cam teaching tools.
Owner:周帅

Emergency evacuation vehicle multi-batch scheduling decision-making method

ActiveCN108280575AMeet the actual needs of scheduling managementMeet needsForecastingResourcesMathematical modelGeolocation
The invention discloses an emergency evacuation vehicle multi-batch scheduling decision-making method and aims to solve the multi-batch vehicle scheduling problem under emergency conditions and especially during the shortage of emergency vehicles to allow disaster-affected people to be rapidly and efficiently evacuated to designated places. A system used by the method comprises a data input module, a data calculation and processing module and a scheme outputting module and is characterized in that data input contains the inputting and storage of static data including the geographical positionsof evacuation stations and a parking lot, the shortest path between the parking lot and each station and the total quantity and capacity of emergency vehicles, and the inputting of real-time data; the data calculation and processing module generates a vehicle scheduling scheme by building a vehicle scheduling mathematical model and using a non-dominated sorting genetic-simulated annealing algorithm; the scheme outputting module reprocesses numerical values obtained by the system through calculation, converts codes into words and outputs a corresponding route scheme. The emergency evacuation vehicle multi-batch scheduling decision-making method is applicable to the field of road traffic emergency management, improves the emergency response speed and meanwhile achieves a simple, rapid and effective emergency vehicle scheduling process.
Owner:HARBIN INST OF TECH

RNA (Ribonucleic Acid) interference carriers of RSV (Rice Stripe Virus) and RBSDV (Rice Black-Streaked Dwarf Virus) as well as construction method and application thereof

The invention relates to RNA (Ribonucleic Acid) interference carriers of RSV (Rice Stripe Virus) and RBSDV (Rice Black-Streaked Dwarf Virus) as well as a construction method and application thereof, belonging to the technical field of biology. The invention establishes RNA interference carriers pMCG161+/-D and pCMBIA1301+/-D of the RSV by using sequences shown as SEQ ID NO1. The invention provides an interference virus gene expression carrier for plant disease-resistant gene engineering as well as a construction method and application thereof and provides a new concept for the application of a transgenic technology and RNA interference in biological resistant breeding. By transplanting the carrier to rice, a virus-resistant plant is successfully acquired, the expected target of obtaining a RSV and RBSDV-resistant rice new material according to the principle of RNA interference is realized, a successful example is provided for plant resistant breeding and gene engineering of RNA interference mediums and the blank of researches on the RSV and RBSDV resistance of the RNA interference mediums in the field is made up.
Owner:INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI

Photovoltaic power station efficiency attenuation prediction method

ActiveCN106204332AInsufficient consideration to make up for efficiency attenuationMake up for the problem that the accuracy needs to be improvedData processing applicationsSystems intergating technologiesUltrasound attenuationDecomposition
The invention discloses a photovoltaic power station efficiency attenuation prediction method. The method comprises the steps that firstly, actually-measured power station operating environment parameters and output power are selected as actually-measured samples; a power station simulation platform is established, the environment parameters of the actually-measured samples are input into the simulation platform, and simulation samples under corresponding environment parameters are obtained; the power of the two sets of samples is regarded as a signal source, an actually-measured power signal and a simulated power signal are denoised, and data obtained after denoising is used for calculating power station output efficiency EFF values at corresponding moments; the obtained EFF value sequence is decomposed through an EMD method, and all the EFF values obtained after decomposition through the EMD method are stored as a historical sequence; sample points are drawn from the historical sequence and input into an efficiency attenuation prediction model, and predicted values are obtained. The method overcomes the defect that through an existing model, photovoltaic power station efficiency attenuation under different outdoor conditions is not predicted sufficiently, and the method is beneficial for market-oriented operation of a photovoltaic power station and further achievement of failure prediction and healthy management technologies of the photovoltaic power station.
Owner:HOHAI UNIV CHANGZHOU

Portable furrowing, topdressing, pressing and soil covering integral machine for cornfield

InactiveCN102326477AMake up for the vacancySolve the poor effect of covering soilFertiliser distributersAgricultural engineeringSoil cover
The invention relates to a portable furrowing, topdressing, pressing and soil covering integral machine for cornfield, which aims at completing the work procedures of furrowing, topdressing, pressing and soil covering in one step. The operation efficiency is high. The portable furrowing, topdressing, pressing and soil covering integral machine for the cornfield comprises a topdressing device, a pressing device, a soil covering device, a transmission device, a machine frame and an earth wheel, wherein the machine frame comprises a front fork, a front fork handle, an inclined vertical rod, a pull rod and an armrest, the armrest is in a shape similar to an I shape, the topdressing device comprises a fertilizer box, a fertilizer box support frame, two sets of fertilizer discharge components and two sets of fertilizer conveying components, the fertilizer discharge components comprise fertilizer discharge shafts, regulating valves, blocking wheels, fertilizer cleaning brushes, fertilizer pulling wheels and compression springs, the fertilizer box support frame comprises four cross beams, two vertical beams, two inclined vertical arms and one front beam, the pressing device comprises a regulation plate B, pressing wheels and a pressing wheel handle, the middle point of the regulating plate B is welded on the front fork handle of the machine frame, one pressing wheel is respectively arranged at the left side and the right side of the regulating plate B, the soil covering device comprises a regulating plate C and a rake, and the rake consists of a rake handle and rake teeth.
Owner:WHEAT RES INST OF AGRI SCI

Expansive soil (rock) roadbed retaining swelling-reducing structure and construction method thereof

The invention discloses an expansive soil (rock) roadbed retaining swelling-reducing structure and a construction method thereof. The roadbed retaining swelling-reducing structure comprises a lateral ditch, a lateral ditch platform, an inverted filter, a swelling-reducing water draining layer, a breast board, a plate top concrete platform and a water draining hole, wherein the lateral ditch is a U-shaped lateral ditch; the lateral ditch platform is horizontally arranged at an edge of the lateral ditch; the inverted filter, the swelling-reducing water draining layer and the breast board are vertically arranged on the lateral ditch platform and are successively arranged on the exterior of the expansive soil (rock) from inner to outer; the plate top concrete platform is horizontally poured on the swelling-reducing water draining layer, the inverted filter and the expansive soil (rock); and the swelling-reducing water draining layer is arranged as an elastic elastomer. The construction steps are as follows: constructing the lateral ditch after completing the cutting earth rock excavation and stay pile construction; constructing the lateral ditch platform and leveling the plate bottom concrete; hoisting the breast board, mounting the breast board while paving the swelling-reducing water draining layer and the inverted filter; and constructing the plate top concrete platform. The expansive soil (rock) roadbed retaining swelling-reducing structure has the advantages of water draining function, obvious swelling-reducing effect, excellent water draining effect, convenience in construction and easily controlled quality.
Owner:SICHUAN RUITIE TECH

Experimental system and method capable of simulating gear transmission non-inertial system environment

The invention discloses an experimental system and an experimental method capable of simulating a gear transmission non-inertial system environment, which relate to the field of aviation power transmission. The experimental system capable of simulating the gear transmission non-inertial system environment comprises a gear transmission experiment table, a linear motion platform and an electric vibration table, wherein the linear motion platform drives the gear transmission experiment table to do horizontal linear acceleration motion, so as to simulate a gear transmission linear acceleration non-inertial system environment; the electric vibration table drives the gear transmission experiment table to rotate back and forth around a horizontal shaft, so as to simulate a gear transmission pitching non-inertial system environment; and the electric vibration table drives the gear transmission experiment table to rotate back and forth around a vertical shaft, so as to simulate a gear transmission yawing non-inertial system environment. According to the experimental system and the experimental method, the dynamic experiment of a gear transmission system during basic fixation can be carriedout, the non-inertial excitation of the gear transmission system during the maneuvering flight of an aircraft can be simulated, and the vacancy of the experimental research in the aviation power transmission field considering the non-inertial system environmental conditions in China is made up.
Owner:CHONGQING UNIV

Method for thermoelectric coupling analysis of double-glass photovoltaic module

The invention discloses a method for thermoelectric coupling analysis of a double-glass photovoltaic module. Firstly, a simplified engineering mathematic model of the photovoltaic module is obtained according to physical models such as a single diode of a photovoltaic battery, and a simulation model of the photovoltaic module is established. Secondly, a heat exchange manner of the double-glass photovoltaic module is analyzed according to structure characteristics, physical characteristics and optical characteristics of the double-glass photovoltaic module; according to an energy balance equation, a relation equation of temperature, power, convection and thermal radiation of the module is established; and a temperature physical equation of the module is obtained. Finally, a thermoelectric coupling simulation model is established in combination with the engineering mathematic model and the temperature physical equation of the module, so that the thermoelectric coupling analysis of performance of the double-glass photovoltaic module can be achieved. The method disclosed by the invention makes up deficiency of existing models in consideration of temperature influences generated during performance research of the double-glass module, effectively makes up vacancy in the field, facilitates the performance research of the double-glass photovoltaic assembly and also facilitates further marketization of the double-glass photovoltaic module.
Owner:HOHAI UNIV CHANGZHOU

Five-axis numerical control machine tool planar processing process ball-end cutter and workpiece contact area semi-analytic modeling method

The invention relates to a five-axis numerical control machine tool planar processing process ball-end cutter and workpiece contact area semi-analytic modeling method and belongs to the processing field of a five-axis numerical control machine tool. The method comprises steps that firstly, according to monotone distribution characteristics of a ball-end cutter along the axis direction, a ball-endcutter and workpiece contact area boundary three-dimensional solution problem is converted into a boundary two-dimensional solution problem of the contact area perpendicular to a cutter axis plane projection; secondly, through geometric derivation, a solution problem of the ball-end cutter and workpiece contact area boundary in an Xm-Ym plane projection equation is converted into a solution problem of the boundary in a projection equation of an X-Y plane; and lastly, through a semi-analytic modeling method, the projection equation of the ball-end cutter and workpiece contact area boundary in the Xm-Ym plane is acquired. The method is advantaged in that the ball-end cutter and workpiece contact area under a front inclination angle alpha and a side inclination angle beta can be precisely andefficiently constructed, vacancy of the ball-end cutter and workpiece contact area boundary identification method in the processing process on the five-axis numerical control machine tool at home andabroad can be made up, and relatively high engineering application values are realized.
Owner:DALIAN UNIV OF TECH

Bearing rotation degree qualified rate automatic detection device

The invention relates to the related field of bearings, and discloses a bearing rotation degree qualified rate automatic detection device which comprises a main box body, a main transmission cavity isformed in the main box body, and the left end wall of the main transmission cavity is communicated with a bearing detection cavity which penetrates through the front end face and the rear end face ofthe main box body and is provided with a leftward opening.The lower end wall of the bearing detection cavity communicates with a bearing transmission cavity; a knocking cavity communicates with the tail end of the upper side of the right end wall of the bearing detection cavity; the screening mechanism is driven by the motor to complete screening of the bearing rotation qualification degree, thetime is saved, the efficiency is high, the vacancy of a bearing inspection method is made up, bearings rotating abnormally can be screened continuously only by placing the bearings on buckles of a transmission belt, According to the bearing detection device, the labor cost is greatly reduced, errors caused by a manual detection mode are reduced, the percent of pass of the bearing when the bearingleaves a factory is increased, and the accident rate caused by the fact that the bearing cannot rotate normally in the application range of the bearing is reduced.
Owner:SHENGZHOU PANCHEN MASCH TECH CO LTD

Temperature control and pressure control sample stage and temperature and pressure control system

The invention provides a temperature control pressure control sample stage and a temperature and pressure control system. The temperature control and pressure control sample stage in the temperature and pressure control system comprises a pressure cover, a heat conductor and a microscope stage, a sample groove is arranged on the top of the heat conductor, a temperature sensor and a heating resistor are distributed at the bottom of the sample groove from top to bottom, a pipeline for conveying a cold medium is arranged in the heat conductor, the pipeline is arranged around the sample groove, and the pressure cover is buckled on the sample groove to provide a high pressure for the sample groove. The temperature control system includes a cold source, a high-pressure spring hose connected to the pressure cover, and a controller, two ends of the pipeline are respectively connected with a cold source and a cold medium pump, and the controller is connected with the temperature sensor, the cold medium pump and the heating resistor; and one end of the high-pressure spring hose is divided into four branches, one of the branches is connected with a vacuum pump for pumping out a gas in the pressure cover, one of the branches is connected with a high-pressure gas source for injecting a gas into the pressure cover, one of the branches is connected to with a stop valve, and the remaining oneis connected with a back pressure valve for making the gas pressure of the pressure cover smaller than a preset value for the back pressure valve.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
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