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217 results about "Research efficiency" patented technology

Unmanned aerial vehicle intelligent perception system and method based on multiple sensors

The invention relates to a sensor and unmanned aerial vehicle intelligent perception control technology, so as to realize the intelligent perception of an unmanned aerial vehicle to the surrounding environment. The system can verify other autonomous localization algorithms and target recognition algorithms to improve the research efficiency of the intelligent perception technology. According to the unmanned aerial vehicle intelligent perception system and method based on multiple sensors, the system comprises a laser radar, an RGB-D visual sensor, an IMU inertial measurement unit, an embedded airborne processor and a flight controller; the laser radar is used to measure the distance information of the surrounding environment; the RGB-D visual sensor collects the distance information and image information of the surrounding environment; the laser radar collects 2D point cloud data, while the RGB-D visual sensor collects 3D point cloud data; the IMU inertial measurement unit is a device which measures the three-axis attitude angle and the acceleration of the device; and the embedded airborne processor comprises two independent modules of autonomous positioning and target recognition. The unmanned aerial vehicle intelligent perception system and method based on multiple sensors are mainly used for unmanned aerial vehicle control.
Owner:TIANJIN UNIV

Vector-quantization-based overall and local color image searching method

The invention relates to a vector-quantization-based overall and local color image searching method. The invention provides a new color image searching method, and relates to the field of an image processing technology. The method comprises the steps of converting an RGB (red, green and Blue) color space into an HSV (Hue, Saturation, Value) color space, performing relatively accurate clustering division on the color space by applying a neural-network-based competitive learning algorithm training code book; describing a space distribution situation of colors by introducing a color transfer matrix; combining the two characteristics, namely an index column diagram and a main color transfer matrix, so as to perform the similarity measurement; processing images by applying a morphological opening-and-closing operation, highlighting a target contour so as to extract a local interest area so as to highlight an important area and limit background information. The color image searching method overcomes the defects that the color space distribution description is not enough and the background information cannot be effectively limited by using the overall color histogram method. By using the vector-quantization-based overall and local color image searching method, the color quantization is relatively accurate, the matching effect is relatively good, and the vector-quantization-based overall and local color image searching method is an effective method for further improving the researching efficiency.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

HLA (High Level Architecture)-based multi-unmmaned aerial vehicle distributed simulation method

ActiveCN102508439AReduce development costsEnsure real-time performance of simulation data transmissionSimulator controlControl systemResearch efficiency
The invention relates to a multi-unmmaned aerial vehicle distributed simulation method, aiming at providing a distributed simulation platform which can be used for coordination control of a multi-unmmaned system, so as to provide a simulation analysis environment for related theoretical researches on multi-unmmaned aerial vehicle system control schemes and algorithms and improve research efficiency of a multi-unmmaned aerial vehicle algorithm. The invention adopts the technical scheme that an HLA (High Level Architecture)-based multi-unmmaned aerial vehicle distributed simulation method is realized by virtue of a ground control system computer, a platform task management system computer and a plurality of virtual unmmaned aerial vehicle computers, a task scheduler and a corresponding control instruction are sent to the platform task management system computer by virtue of an RTI (Real-Time Interface) simulation interface on the ground control system computer; a decision instruction isproduced on the platform task management system computer aiming at contents of the task scheduler and the control instruction according to a multi-vehicle and single-vehicle control algorithm; and finally real-time flying states of multiple unmanned aerial vehicles are observed in a visualized environment on the virtual unmanned aerial vehicle computers. The multi-unmmaned aerial vehicle distributed simulation method provided by the invention is mainly applied to distributed simulation of the unmmaned aerial vehicles.
Owner:TIANJIN UNIV

Railway transportation junction population type identification method based on mobile phone signaling data

The invention provides a railway transportation junction population type identification method based on mobile phone signaling data. The method comprises the steps of aiming at the specific city hubs,such as the high-speed railway stations, the railway stations, etc., based on the relationship between the geographic information of a hub station and the service range of an operator base station, obtaining a target hub base station, utilizing the space-time information of the mobile phone signaling data to obtain a user travel track occupying the hub base station; according to the different characteristics of various populations in time and air, and by a logic relationship between each stay point in a travel track chain and the hub base station, identifying and judging the types of different populations, so that the qualitative and quantitative basis is provided for the further analysis and planning of the hub transportation, at the same time, by utilizing the characteristics of large sample size, wide coverage, mature and stable acquisition mode, lower cost and the like of the mobile phone big data, the result accuracy is improved, meanwhile, the process cost is reduced, and the research efficiency is improved.
Owner:NANJING RUIQI INTELLIGENT TRANSPORTATION TECH IND RES INST CO LTD

Multi-factor comprehensive quantitative analysis and sorting method for academic influences of scientific research institutions

The invention discloses a multi-factor comprehensive quantitative analysis and sorting method for academic influences of scientific research institutions. The method includes the steps that document retrieval of a specific research field is performed in a citation database, and document metadata of the field are acquired; metadata of the relevant scientific research institutions are extracted according to the document metadata of the field; a weighed cooperation network of the scientific research institutions is constructed according to the metadata of the scientific research institutions; on the basis of the weighed cooperation network of the scientific research institutions, a factor graph model including multiple factors of the academic influences of the scientific research institutions is established; a circulation max-sum algorithm is used for performing approximate reasoning on a factor graph, variables of the factor graph are determined and edge probability values of all the factors are concentrated; academic influence sorting of the scientific research institutions in the research field retrieved by users is acquired and output according the descending sort result of the edge probability values. Due to the multi-factor comprehensive quantitative analysis and sorting method for the academic influences of the scientific research institutions, scientific research personnel can accurately position the high-academic-influence scientific research institutions, track research results and improve scientific research efficiency easily.
Owner:HOHAI UNIV

Track programming method used in searching of uncertain environment using multi unmanned aerial vehicles

The invention provides a track programming method used in searching of uncertain environment using multi unmanned aerial vehicles. The track programming method comprises following steps: modeling of aflight environment is carried out, modeling of flight states is carried out, coding of genetic algorithm is carried out, and modeling of a searching probability graph is carried out; initialization of calculating parameters of the genetic algorithm is carried out; unmanned aerial vehicle flight mode is determined; the genetic algorithm is adopted for random generation of path population, the population with the largest reward is selected, the unmanned aerial vehicles are controlled to fly to the population, prediction of path at current positions is carried out, and the step is repeated; flymechanics are added into unmanned aerial vehicle flight environment; the unmanned aerial vehicle searching environment is divided into 9 zones, the distance between each pair of zones is designed to be the distance from the center of each zone to the center of another zone, and the distance between two zone sharing a same edge is defined to be 1, and the reward between each pair of zones is designed to be the reciprocal of the corresponding distance. The track programming method is capable of performing target search effectively, and enlarging map covering rate, realizing effective cooperationof a plurality of unmanned aerial vehicles, and increasing research efficiency.
Owner:HENAN UNIVERSITY +1

Extraction method for influence factors of carbon exchange of ecosystem and system

The invention discloses an extraction method for influence factors of carbon exchange of an ecosystem and a system. The extraction method includes steps of 1), acquiring attribute data of carbon flux samples in a carbon flux data observation station; 2), inputting the attribute data, which are obtained in the step 1), of the carbon flux samples, selecting the optimal combination by the aid of proposed fuzzy rough and reduction integrated algorithm of shuffled frog leaping or quick fuzzy rough and reduction integrated algorithm based on importance, and finding an environmental factor set with the closest relationship with carbon flux; and 3), realizing modeling and stimulating for various environmental factors in the environmental factor set obtained from the step 2) by the aid of a neural network, and obtaining extraction rate of the environmental factors of the carbon flux. The extraction system comprises a data import module, a factor extraction module, an input module and an evaluation module. By the aid of the extraction method and the system, the range of correlation factors of the carbon flux in the researched ecosystem can be effectively reduced, research efficiency is improved, and inherent law among the environmental factors is found.
Owner:SOUTH CHINA AGRI UNIV

Design method for ODE physical engine-based vehicle terrain trafficability simulating and analyzing components

The invention discloses a design method for ODE physical engine-based vehicle terrain trafficability simulating and analyzing components, and relates to a design method of the vehicle terrain trafficability simulating and analyzing components and aims at solving the problems that a large amount of manpower, material resources and financial resources are consumed in the prior art and the research efficiency is low and the period is long in the prior art. The method comprises the following steps: step one, reading terrain elevation data expressed by the SEDRIS (synthetic environment data representation and interchange specification) standard; step two, building a three-dimensional terrain model by reading the terrain elevation data; step three, building a vehicle model for simulating a real vehicle; step four, finishing analyzing the trafficability of the vehicle according to the basic parameters of a vehicle model of the real vehicle; step five, encapsulating the vehicle trafficability analyzing procedure as a trafficability effect component by utilizing a resource encapsulating tool of HIT-TENA. The design method is applied to the design field of the vehicle terrain trafficability simulating and analyzing components.
Owner:HARBIN INST OF TECH

Multifunctional electrolytic tank for scanning electrochemical microscope

The invention relates to a multifunctional electrolytic tank for a scanning electrochemical microscope, which comprises an upper cover, a lower cover and a double-layer cylinder, wherein the upper cover and the lower cover are concave, the inner side of the upper cover and the inner side of the lower cover are respectively provided with an internal thread I, two ends of the double-layer cylinder are respectively provided with an external thread II, the external threads II are matched with the internal threads I, the double-layer cylinder is internally provided with electrolyte solution. The upper cover, the lower cover and the double-layer cylinder are connected by the internal threads I and the external threads II; the upper cover is provided with a circular hole I, a circular hole II and a circular hole III; the circular hole I is internally provided with a working electrode; the circular hole II is inserted with a glass bent tube I; the circular hole III is inserted with a glass bent tube II, the upper part of the side wall of the double-layer cylinder is provided with a water outlet, the bottom of the side wall of the double-layer cylinder is respectively provided with a water inlet, a side branch tube I and a side branch tube II; and the side branch tube I and the side tube II are symmetrically arranged, and are respectively provided with a reference electrode and a counter electrode. The multifunctional electrolytic tank can complete the experiments of a three-electrode system, a four-electrode system and a complex electrode system through different structures of the lower cover, has a simple structure, is convenient to disassemble, and improves the research efficiency.
Owner:NORTHWEST NORMAL UNIVERSITY

Method for spraying silicone rubber paint layer on engine shell

The invention discloses a method for spraying silicone rubber paint layer on an engine shell. The method comprises the steps of: researching robot spraying parameters in combination with parameters of paint; establishing a relevant technical theoretical model when a robot finishes spraying a coating layer on the outer surface of a solid rocket engine, putting forward a calculation method of key technical parameters, and providing a method for calculation of forming technological parameters of different types and different coatings. The method can be used for shaping work of various types of engine paint layer robots with the diameter greater than 200 mm; if the technical theoretical model is adopted by a novel paint material in the solid rocket engine surface spraying technology research work, optimal spraying speeds Vs and Vm are determined only through combined adjustment of spraying parameters of the robot and the paint material, so that robot spraying technological parameters in the whole spraying process can be determined. The method for spraying silicone rubber paint layer on an engine shell provides a research technical theoretical model and a research method for a surface thickness required coating shaping technology of the robot solid rocket engine, speeds up the research progress, improves research efficiency and reduces research expense.
Owner:XIAN AEROSPACE CHEM PROPULTION PLANT

Device and method for preparing true triaxial remolded sample by utilizing vacuum preloading

The invention discloses a device and a method for preparing a true triaxial remolded sample by utilizing vacuum preloading. The device comprises a sealed top cover, a test sample preparation frame, a drainage base, a saturation device and other main components, as well as mating parts, such as a rubber mold, a rubber sealing washer, a preservative film and filter paper. The sealed top cover is made of a rectangular hollow flange plate; the test sample preparation frame consists of a flange plate and a rectangular frame, and the purposes of being easy to cut and settling and preserving a soil sample can be realized; the drainage base is made of a solid flange plate, and is provided with a rectangular groove, drainage holes distributed in a plum-blossom type are formed in the groove to realize two functions of drainage and reserve of a cutting layer, and a water collecting box is arranged on the other side of the base; the saturation device is arranged, so that the prepared soil sample can absorb water to be saturated. According to the device and method disclosed by the invention, the purposes of fast preparing a saturated test sample with slightly high moisture content can be realized, the density and moisture content of the prepared test sample are accurate and uniform, secondary cutting, disturbance and waste can be avoided, the production flow can be simplified, and the research efficiency of true triaxial testing can be effectively improved.
Owner:HOHAI UNIV

Three-dimensional simulation platform for operation demonstration and algorithm verification of service robot

The invention discloses a three-dimensional simulation platform for operation demonstration and algorithm verification of a service robot. The three-dimensional simulation platform comprises a servicerobot simulation model, a three-dimensional domestic simulation environment and a software and hardware interface. The service robot three-dimensional simulation model simulates a real service robot,corresponding actions under the gravity, the movement inertia and the frictional force are carried out, and physical laws are automatically observed under the effect of a physical engine; and the three-dimensional domestic simulation environment simulates a real environment, objects in the environment are set up by utilizing a real proportion of the environment and physical parameters, and the software and hardware interface achieves operation to the service robot three-dimensional simulation model and the three-dimensional domestic simulation environment and is connected with the real service robot. According to the three-dimensional simulation platform for operation demonstration and algorithm verification of the service robot, a development process and a development period of a traditional service robot are optimized through a computer simulation technology so that research personnel can test algorithms more comprehensively through representation demonstration of the three-dimensional simulation environment, and further the research efficiency is improved.
Owner:SHANGHAI JIAO TONG UNIV

System for establishing software demand model and method for establishing software demand model

InactiveCN102364440AReduce the difficulty of requirement modelingMeet needsSpecific program execution arrangementsRequirements modelResearch efficiency
The invention relates to a system for establishing a software demand model and a method for establishing a software demand model. The system for establishing a software demand model comprises a software demand information processor which is independent or is established in a computer, input equipment and an output interface, wherein the software demand information processor comprises a software demand information unit, a scene establishing unit, a behavioral model establishing unit and a software demand model detecting, modifying and output unit. The method for establishing the software demand model comprises the following steps of: A. inputting software demand information; B. establishing a scene; C. establishing a behavioral model; and D. detecting, modifying and outputting the software demand model. The system for establishing a software demand model and the method for establishing a software demand model have the advantages of establishing a high-quality demand model for a complex software system by using a scene and viewpoint technology, automatically detecting whether the demand of a software system is correct and complete or not, being compatible with several other modeling methods and technologies, reducing the research cost and improving the research efficiency.
Owner:WUHAN JIAHONGTENG TECH

Method of processing kinematic characteristic data and dynamic characteristic data of automobile suspension

The invention provides a method of processing kinematic characteristic data and dynamic characteristic data of an automobile suspension. The method comprises the steps: acquiring simulation documents and experimental documents of simulation and experimental tests under different work condition items; importing the acquired simulation documents and experimental documents into MATLAB (matrix laboratory) and extracting simulation data and experimental data from the MATLAB; acquiring simulation curves and experimental curves, capable of reflecting K&C characteristics of the suspension, of multiple work condition items and acquiring zero-point values or zero-point gradient values of the corresponding parameters; generating a K&C characteristic parameter table according to the calculated zero-point values or zero-point gradient values; and generating a report document according to the data processing result. Problems of consuming long time and making mistakes easily for obtaining the suspension performance analysis report can be solved well; the researching efficiency of the suspension performance of a simulation model or a trial vehicle at the automobile development and design stage can be improved greatly and the development cost is saved.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

Vertical plating tank with independent adjustable function

The invention discloses a vertical plating tank with an independent adjustable function. The vertical plating tank comprises a cathode box and an anode box, wherein the electrode faces of the cathode box and the anode box are oppositely arranged; two sides of the electrode faces of the cathode box and the anode box are provided with side-push plates; therefore, plating solution channels are respectively formed among the cathode box, the anode box and two side-push plates; one of the cathode box and the anode box is installed on the linear guide rail and is connected with a driving mechanism, so that a distance between a cathode face and an anode face can be regulated through the relative movement of the cathode box and the anode box; the side-push plates are of a dismountable structure; and a liquid outlet below the plating solution channels is provided with an intercepter plate which can regulate the flow of the plating solution. The vertical plating tank has a simple and compact structure and is convenient for workpiece assembly and disassembly, and an interval between the cathode plate and the anode plate as well as plating solution flow rate can be independently regulated, which is convenient for laboratory users to analyze electroplating efficiency and product performance. The accurate and varied test means are provided for developing a new coating, diagnosing product defects, optimizing the plating process and the like, and the vertical plating tank is favorable for lowering test cost and increasing research efficiency.
Owner:武汉钢铁有限公司

Physical simulation and numerical simulation combined measurement method for crack generation full-diameter rock core

The invention belongs to the technical field of petroleum engineering, and discloses a physical simulation and numerical simulation combined measurement method for a crack generation full-diameter rock core. Through backward sequential optimization of experiments, a finite number of full-diameter rock core samples are adopted for carrying out orthogonal experimental design to develop related simulation experiments; by utilizing full-diameter rock core artificial cracks, artificial crack full-diameter carbonate rock core samples with different equivalent permeability are obtained; and synchronous fitting and prediction of the physical simulation experiment and numerical simulation are carried out, equivalent permeability parameters of a crack grid during the numerical simulation are obtained through fitting, and a basis is provided for the equivalent permeability value of the crack grid in the numerical simulation experiment. According to the method, a lot of repeated conventional physical simulation experiments can be reduced, so that the research efficiency and the economic benefit are improved; and the specific application of the orthogonal experiment scheme design which combines the physical simulation with the numerical simulation to the water invasion mechanism and water invasion performance research of a complex carbonate rock gas reservoir is illuminated.
Owner:SOUTHWEST PETROLEUM UNIV
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