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42 results about "Geographic information system software" patented technology
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Method for measuring lightning shielding failure trip-out rate of high-voltage power transmission line by combining topography
The invention discloses a method for measuring a lightning shielding failure trip-out rate of a high-voltage power transmission line by combining topography. The method comprises the following steps of: acquiring related parameters of the power transmission line, dividing the power transmission line into a plurality of intervals according to a pole tower, dividing each interval into a plurality of small sections by adopting an equal division method, calculating longitude and latitude coordinates of each section and an auxiliary point vertical to each section through longitude and latitude coordinates of the pole tower, further acquiring altitudes of each section and the auxiliary point by adopting geographic information system software, finally calculating a ground inclination angle of each section according to the height difference and distance between the auxiliary point and the subsection point, and calculating the shielding failure trip-out rate of each section by using an electric geometrical model considering the striking distance coefficient and the ground inclination angle. The method can conveniently calculate the ground inclination angle at the pole tower of the power transmission line, reflect the actual topographical characteristics of a corridor of the power transmission line, and provide reliable basis for evaluating the lightning protection effect of a lightning wire of the power transmission line.
Owner:SOUTHWEST JIAOTONG UNIV
Road network limitation capacity determining method based on pressure test
InactiveCN101364344AGuaranteed practicalityGuaranteed accuracyDetection of traffic movementSpecific program execution arrangementsTraffic capacityGeographic information system software
The invention relates to a road-net ultimate capacity determination method based on pressure measurement, which belongs to the field of road-net traffic capacity control techniques and which is characterized in that: the method comprises the following steps of adopting the observation network of a computer to collect the traffic parameters of a road net; adopting a macroscopic traffic simulation and planning software Cube and a geographic information system software ArcGIS to generate road-net files and initial values of pressure measurement in the computer; adopting the software Cube to generate a pressure measurement model which performs the pressure measurement in a preset measurement period; calculating the road-net average saturation and the road-net average velocity; comparing the two calculated valves to the preset index values of the road-net average saturation and the road-net average velocity; judging whether the calculated valves meet the preset requirements; and if either fails, increasing the road-net traffic capacity and continuing the pressure measurement until both meet the requirement; and determining the road-net traffic capacity at the time as the road-net ultimate capacity. The road-net ultimate capacity determination method increases the calculation accuracy, reliability and efficiency and fills the blank of determining the road-net ultimate capacity based on pressure measurement.
Owner:BEIJING UNIV OF TECH
Dynamic route guidance method oriented to urban traffic
InactiveCN102169637ASolve the traffic banWork around steering restrictionsInstruments for road network navigationRoad vehicles traffic controlGuidance systemSystems research
Owner:PEKING UNIV
Asset tracking using wireless LAN infrastructure
InactiveUS7256681B1Direction finders using radio wavesSubscribers indirect connectionVisibilityTriangulation
Transponders capable of providing identification information and possibly additional information are detected from wireless access points of a computer network as a substitute for closed radio frequency identification (RFID) systems while providing numerous additional functionalities and applications. Total asset visibility or responses to more limited queries are provided by inclusion of a geographic information system software application. Location reporting of proximity of devices / transponders to access points can be enhanced to a fine-grained level by triangulation or other algorithms including neural networks.
Owner:LOCKHEED MARTIN CORP
Research method for dynamically monitoring slope scale erosion development process by utilizing three-dimensional laser scanning technique
InactiveCN101793543ATimely determinationHigh speedWeighing apparatus for materials with special property/formPoint cloudSoil science
The invention discloses a research method for dynamically monitoring a slope scale erosion development process by utilizing three-dimensional laser scanning technique, which has the advantages of quickness, accuracy, high precision and the special suitability for the dynamic monitoring of the slope scale soil erosion. The method comprises the following steps of: a, defining a measurement area, and measuring a soil density of the measurement area; gluing a circle of reflection material stickers on borders of the measurement area, scanning the area to be measured by using a three-dimensional laser scanning instrument so as to generate point cloud data of different parts of the measurement area; b, uniformly combining the scanning data of all sites to obtain the raw data; c, forming bright lines in the raw data by using the reflection materials on the borders of the measurement area, and cutting the measurement area; and d, vacuating the point cloud data generated after cutting, importing the point cloud data to the geological information system software, analyzing a volume change of the measurement area before and after rainfall, and according to the slope soil density and the volume variable quantity of the area to be measured, calculating the change of the individual rainfall soil erosion amount.
Owner:郑粉莉 +2
Sub-basin dividing and information extracting method based on IDL and Mapinfo
ActiveCN103677826AImprove computing efficiencyEasy to useSpecific program execution arrangementsRiver routingGeographic information system software
The invention discloses a sub-basin dividing and information extracting method based on IDL and Mapinfo and belongs to the hydrology science of physical geography science. According to the sub-basin dividing method, high-accuracy DEM data are used for dividing basins in an upscaling mode through an IDL program language, and the characteristics of IDL matrix orientation and high operation efficiency are well used. Through analysis of DEM, the geology and geomorphic features such as sub-basin dividing structures, the topological relation between sub-basins, sub-basin control points, the control range, water-collecting area, riverway length between sub-basins and gradients are obtained, and support is provided for basin runoff simulation. Meanwhile, powerful geographic information system software MapInfo is used for displaying sub-basin dividing results. Based on the IDL, the sub-basin topological relation and the sub-basin control point position are generated, and the sub-basin topological relation is shown through the MapInfo programming language MapBasic.
Owner:HOHAI UNIV
Rice nitrogen nutrition monitoring method based on unmanned aerial vehicle loaded active canopy sensor
PendingCN109444069AImprove bindingImproving the ability of non-destructive monitoringScattering properties measurementsSatellite radio beaconingDry weightNutrition
The invention discloses a rice nitrogen nutrition monitoring method based on an unmanned aerial vehicle loaded active canopy sensor. The rice nitrogen nutrition monitoring method based on the unmannedaerial vehicle loaded active canopy sensor comprises the following steps: constructing a crop monitoring platform of an unmanned aerial vehicle loaded active non-imaging canopy spectrum sensor; usingan unmanned aerial vehicle ground station system, controlling an unmanned aerial vehicle monitoring system, and automatically acquiring rice canopy spectrum data and the position information of a corresponding test point under a testing distance which is higher than a canopy by 1.5 m and at a flight speed of 2 m / s; extracting spectrum data of various parcels of rice field by using geographic information system software; calculating vegetation indexes RERVI; estimating rice leaf dry weight, leaf area index and leaf nitrogen accumulated amount on the basis of a monitoring model of RERVI, and evaluating rice nitrogen nutrition conditions. By the method, crop nitrogen nondestructive monitoring ability is improved, and thus, the method is used for large-scale comprehensive crop nitrogen fertilizer decision and implementation of accurate agriculture, and the agricultural modern level is improved.
Owner:NANJING AGRICULTURAL UNIVERSITY
Plateau mountain shadow area glacier identification method
InactiveCN109635713AIncreased scattering intensityThe segmentation threshold is obviousImage enhancementImage analysisAtmospheric correctionPlateau
The invention discloses a plateau mountain shadow area glacier identification method, which comprises the following steps: obtaining a Landsat 8OLI plateau mountainous region image, carrying out radiation calibration pretreatment on the Landsat 8OLI plateau mountainous region image, and carrying out atmospheric correction on the calibrated image by using a FLASH model; based on DEM data and solarazimuth and elevation angle information during remote sensing imaging, simulating a corresponding shadow area by using geographic information system software, and performing shadow area identification; according to waveband reflection characteristics of glacier and non-glacier in the shadow area, determining that the blue light waveband is a shadow area glacier information identification dominantwaveband; identifying a dominant band by using glacier information in a shadow area, calculating by using an enhanced identification method to obtain an ENDSI gray scale map, selecting an appropriatethreshold according to a calculation result histogram, and segmenting the ENDSI gray scale map to obtain glacier information in the shadow area. And a dominant wave band enhanced snow cover index method is adopted, so that the glacier identification working efficiency of the overall plateau mountainous region shadow region can be improved.
Owner:YUNNAN UNIV +1
Monitoring method for estuarine wetland exotic species
ActiveCN108195767AAchieve optimal combinationAchieve balanceMaterial analysis by optical meansSatellite dataVegetation
The invention provides a monitoring method for estuarine wetland exotic species. The monitoring method comprises the following steps: S1, selecting an unmanned aerial vehicle and a satellite remote sensing film source according to a monitoring requirement; S2, setting a route of the unmanned aerial vehicle in a target monitoring area and setting corresponding flight parameters of the unmanned aerial vehicle; S3, setting an unmanned aerial vehicle data acquisition task; S4, executing the unmanned aerial vehicle data acquisition task to acquire unmanned aerial vehicle data; S5, matching geographic information of the unmanned aerial vehicle data and satellite data to acquire a pre-processed satellite picture; S6, extracting patch characteristic information in the pre-processed satellite picture; S7, screening to acquire optimal separable characteristic index according to the patch characteristic information; S8, classifying the satellite data according to the optimal separable characteristic index, and performing precision evaluation on a result. The invention provides the monitoring method for the estuarine wetland exotic species, which classifies vegetation of the exotic species byutilizing remote sensing software and geographic information system software, and has the advantages of high timeliness, high resolution, high accuracy, strong objectivity and low cost.
Owner:EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
Vehicle monitoring system based on global positioning system (GPS) and general packet radio service (GPRS)
InactiveCN102421063ALow working voltageSmall sizeSatellite radio beaconingLocation information based serviceGeneral Packet Radio ServiceGeographic information system software
The invention discloses a vehicle monitoring system based on a global positioning system (GPS) and general packet radio service (GPRS). The vehicle monitoring system mainly comprises a monitoring center, a GPRS wireless communication network and a vehicle-mounted terminal, wherein the monitoring center is a computer; the software of a geographic information system is integrated in the computer, and the computer can be networked; and the vehicle-mounted terminal mainly comprises a GPS module, a microprocessor, a GPRS communication module, a keyboard, a liquid crystal module, an alarm module and a secure digital (SD) card. With a comprehensive information technical application system of modern wireless communication network GPRS digital communication and geographic information system (GIS) analysis means, scientific, systematic and comprehensive supervision of various kinds of vehicles is realized, resources such as good vehicles and fields are reasonably configured and scheduled, management efficiency is improved, operational cost is reduced, and an effective way is provided for robbery prevention and theft prevention.
Owner:HARBIN FEIYU TECH
Method for geographically displaying oil and gas related information
InactiveUS20130100127A1Easy to createCathode-ray tube indicatorsGeographical information databasesGeographic information system softwareOil and natural gas
Owner:OSEBERG
Method for calculating channel dredging engineering construction amount based on Skyline software
ActiveCN110929320ACalculation refinementCalculation accuracyGeometric CAD3D modellingTerrainRiver routing
The invention discloses a method for calculating channel dredging engineering construction amount based on Skyline software. The method comprises the following steps: visualizing three-dimensional data of the river terrain by utilizing Skyline software; completing dredging engineering quantity calculation in the Skyline software; and generating a dredging slope model. Through three-dimensional geographic information system software, the dredging engineering mainly relates to three-dimensional visualization of objects. The original complex earth volume calculation of the dredging engineering isrefined and accurate.
Owner:长江航道规划设计研究院 +1
Analysis method for identifying multiple traffic accident points based on alarm data point elements
InactiveCN112365595ADetection of traffic movementCharacter and pattern recognitionTraffic crashGeographic information system software
The invention discloses an analysis method for identifying multiple traffic accident points based on alarm data point elements, which comprises the following steps: searching alarm traffic accident data, generating WGS84 coordinates, importing the WGS84 coordinates into a GIS platform, modeling accident point elements, fusing the searched temperature data, identifying multiple regional accident points by adopting Getis-Ord Gi * hotspot analysis, and carrying out clustering analysis on the accidents to obtain an analysis result; carrying out local multi-occurrence point identification through abnormal value analysis and abnormal values around accident multi-occurrence points, and adopting a clustering analysis method of geographic information system (GIS) software, Thiessen polygons, kerneldensity analysis, hot spot analysis and abnormal value analysis. According to the invention, intuitive spatial information about accident distribution can be provided, spatial distribution characteristics of areas with high accident severity are researched, and accident-prone points are identified.
Owner:YANCHENG INST OF TECH
Road tail gas pollutant monitoring method in driving process and its monitoring device
InactiveCN108088953AChange the fixed point monitoring modeFast and accurate determinationAir quality improvementMaterial analysisData setData center
The invention relates to the field of road tail gas monitoring, more particularly, relates to a road tail gas pollutant monitoring method in driving process and its monitoring device. The device is composed of monitoring devices and a supported carrier and a data center; several moveable monitoring devices are distributed in one zone, and able to sample air in the zone where they pass through, detect and obtain content value of every pollutant component, and send the value along with position information to the data center; through data analysis software in the data center, a detection data set is visibly displayed on a geological information system software and externally published through a center website. The invention aims to provide a monitoring system for testing a road tail gas pollutant at the location during the driving process, an online monitoring device for rapidly testing pollutant of road tail gas and a matched monitoring method; therefore, the distribution condition of road tail gas pollutant in a city is qualitatively analyzed, and the discharge of every main pollutant is quantificationally calculated.
Owner:中电科鹏跃电子科技有限公司
Airport resource patrol inspection method and system
InactiveCN107992969AReduce walking distanceSave inspection timeForecastingWalking distanceGeographic information system software
The invention relates to the field of geographic information system software, in particular to an airport resource patrol inspection method. The method comprises the steps of determining a patrol inspection starting point and to-be-inspected resources, and calculating the distance between any two to-be-inspected resources; according to the coordinates of the starting point and the distance betweenany two to-be-inspected resources, generating a weighted undirected connected graph; obtaining the minimum connected path according to the weighted undirected connected graph; generating the shortestpatrol inspection path according to the minimum connected path, and appointing a patrol inspector to conduct patrol inspection according to the shortest patrol inspection path. The invention furtherprovides an airport resource patrol inspection system. According to the airport resource patrol inspection method and system, the shortest patrol inspection path is planned according to the weighted undirected connected graph, and the problem that there is no patrol inspection route originally or a patrol inspection route is artificially designated is solved; the patrol inspector can cover all theto-be-inspected resources at an airport by conducting patrol inspection according to the shortest patrol inspection route, the walking distance of the patrol inspector can be shortened, the patrol inspection time is saved, the patrol inspection efficiency is improved, and the distribution of patrol inspection manpower is optimized.
Owner:广东机场白云信息科技股份有限公司
Line icing thickness prediction method for extracting micro-topographic factors based on variable grid technology
ActiveCN111428942AOvercome the time-consuming drawback of extractionImprove extraction efficiencyForecastingNeural architecturesAlgorithmGeographic information system software
The invention discloses a line icing thickness prediction method for extracting a microtopographic factor based on a variable grid technology, and the method comprises the steps: 1, obtaining a digital elevation model of a research region, and correcting an image coordinate through geographic information system software; 2, collecting an ice area distribution diagram vector file, power grid spacedata, icing monitoring terminal data and icing thickness, and preprocessing the data; 3, extracting microtopographic factor data of each monitoring terminal position by adopting a variable grid technology; 4, calculating the average value of the maximum icing thickness of each icing monitoring terminal in the last five icing periods in the step 2; 5, performing normalization processing on the datain the step 3; and 6, taking the data in the step 5 as independent variables and the data in the step 4 as dependent variables, and establishing a prediction model between the microtopography factorand the line icing thickness by adopting a neural network method, thereby solving the problems of time consumption of microtopography factor extraction and inaccurate prediction of the power transmission line icing thickness.
Owner:GUIZHOU POWER GRID CO LTD
Representation of Depth Notes on Nautical Charts Based on Character Color Extension
InactiveCN102289990AImprove product qualityEasy to useMaps/plans/chartsOcean bottomPattern recognition
The invention discloses a water depth notation method based on character color expansion, which includes the following steps: a. 12 unmeasured bottom symbols and dry out symbols for explaining the water depth notation category through Arabic numerals 0-9 The characters are designed to create a character library for the water depth annotation of the green right oblique isoline body; b. Display and draw the water depth annotation of the green right oblique isoline body through the geographic information system software. The present invention is based on the representation method of sounding notation on the chart based on character color expansion. By adopting the seemingly simple method of expanding the color of the sounding notation, it effectively realizes the two main bathymetric data on the current chart—from single-beam sounding. The difference between deep and multi-beam bathymetric bathymetric data better satisfies chart users in the fields of navigation, marine engineering, and marine fishing. The need to know, reconstruct and utilize the seabed topography, so that the production quality and use value of nautical chart products have been significantly improved.
Owner:彭认灿
Method and device for publishing spatial data
InactiveCN101807197AEasy to loseSpecial data processing applicationsGeographic information system softwareThe Internet
The invention discloses a method and a device for publishing spatial data, which relate to the field of geographic information systems and aim to solve the problem that the data is easy to lose due to interaction performed by adopting a storage medium among different GIS software platforms. The technical scheme provided by the invention comprises the following steps: acquiring the spatial data; converting the spatial data into a uniform form of expression; and publishing the spatial data of the uniform form of expression on the Internet with a vector markup language. The technical scheme provided by the embodiment of the invention is applied to the geographic information system and a geographic information system software platform.
Owner:CENNAVI TECH
Ordinary highway traffic investigation station layout method considering area boundary control
ActiveCN109190940AComprehensive Traffic DataScientificResourcesRoad mapGeographic information system software
The invention discloses an ordinary highway traffic investigation station layout method considering area boundary control, which comprises the following steps: 1) simplifying the road network layer inArcGIS software to obtain a basic road map; 2) establishing a boundary control traffic investigation point according to the intersection position of the highway network and the regional boundary; 3)on the basis of the distribution of the traffic investigation points under boundary control, adding new investigation points to the highway within the region according to the prescribed distance to realize the densification treatment; 4) carrying out de-reprocessing on the planning distribution points according to the position of the planning distribution points and the position of the existing distribution points to remove the planning distribution points located within a certain distance range of the existing station; 5) generating the geographic information and the road information of the planning distribution points based on the geographic information system software, determining the specific position of the distribution points and performing adjustment according to the actual situation. The method enables the overall station coverage rate to reach a higher level on the basis of the regional boundary control, and the comprehensive traffic volume data can be obtained.
Owner:SOUTH CHINA UNIV OF TECH
Recognition method of vehicle region
InactiveCN1563895AAvoid crowdingInstruments for road network navigationRoad vehicles traffic controlRequirements managementGeographic information system software
The invention modifies arc length mathod in mathematical algorithm to determine whether a point is included inside a polygon. The method is realized through a main program for identifying secton and subprograms, which are embedded into TopMap ActiveX software of module type geographical information system. the main program executes following tasks: calling in map, inputting coordinate of vehicle into electronic map of the city, determing crowded area. subprograms are called when the main program is recognizing and determining crowded area. the invention is applicable to traffic control.
Owner:CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
Farming landscape space structure loss evaluation method
InactiveCN103295076AForecastingSpecial data processing applicationsMinimum bounding boxInformation layer
The invention relates to a farming landscape space structure loss evaluation method, and belongs to the field of land survey and evaluation. The farming landscape space structure loss evaluation method includes the steps: (1) utilizing geographic information system software for converting vector land use data of each time phase into raster data; (2) extracting farmland decrease landscape information of an evaluated region in each time period; (3) converting the raster data into vector data, and extracting an information layer of farmland decrease; (4) generating a minimum bounding box from newly decreased farming landscape patches; (5) computing landscape loss indexes of newly decreased farmland; (6) drawing a broken line graph of the LLIs (landscape loss indexes) in each time period, making statistics on peak values of high proportion according to patch number of LLI peak value intervals in the broken line graphs of the LLIs, and using the peak values as LLI threshold dividing criteria for dividing farming landscape space structure loss types and farming landscape space structure loss distribution maps. By the method, landscape structure change rules and relation between landscape decrease spatial mode and landscape pattern can be obtained, and changing processes of the landscape pattern in two or more time phases can be described.
Owner:GUANGZHOU UNIVERSITY
Testing method for geographic information system software
InactiveCN105975386AMeet testing needsResearch and improve quality evaluation indicatorsSoftware testing/debuggingGeographic information system softwareSystem under test
The invention relates to a software testing method. More specifically, the invention relates to a testing method for geographic information system software. The method comprises the steps that a testing case file is compiled and scripted to form a testing script; a testing case is disposed in combination with a route analysis method, at least one group of original testing data and standard testing results are matched according to the testing case, a drive and control unit and a script analysis adapter are tested, and accuracy testing, completeness testing, load performance testing, pressure performance testing, efficiency testing, usability testing and producibility degree testing are carried out successively to a tested system in combination with the testing script and the testing case; the testing results are evaluated, and a testing report is compiled; and the testing case and a defect database are compared, whether testing missing or defect recurrence takes place is analyzed and confirmed, and corresponding testing cases are supplemented. The invention provides a feasible and effective testing tool set for a geographic information system, so that quality and reliability of the geographic information system software can be effectively assessed.
Owner:霍亮
Method for ecological restoration of marginal land of loess plateau by using energy crop triarrhena lutarioriparia
ActiveCN109258263AEasy to manageImprove eco-efficiencyLayeringClimate change adaptationGeographic information system softwareEconomic benefits
Owner:武汉迪因生物科技有限公司
Modular customization method and device for geographic information system software
PendingCN112667210ASimple designEffort-saving designNatural language data processingSoftware designInformation functionGeographic information system software
The invention discloses a modular customization method and device for geographic information system software, and belongs to the technical field of geographic space data. The method comprises the steps: displaying a geographic information system software customization interface, wherein the customization interface comprises function module options, so that a user can select function modules from a function module library according to the function module options, and the function module library comprise packaged function modules and corresponding editing menus, and the function module comprises a geographic information function module and / or a data processing function module; displaying a corresponding editing menu according to the function module selected by the user; editing the attributes of the function modules selected by the user according to editing information input by the user through the editing menu to obtain customized function modules; and generating and storing an XML file according to the customization function module so as to generate customized geographic information system software according to the stored XML file. A user can design professional geographic information system software more simply and effortlessly without mastering a programming technology.
Owner:中科星通(廊坊)信息技术有限公司
CAMEO based city natural gas pipe network emergency rescue system
The present invention discloses a CAMEO based city natural gas pipe network emergency rescue system. The system uses tools such as component type geographic information system software ArcGIS Engine, a CAMEO software package and the like to design and develop a city natural gas pipeline accident emergency rescue system by using Visual Basic as a development language. The system comprises five main modules of an emergency resource management module, an accident information management module, an accident consequence analysis module, an emergency route determining module and an emergency program determining module, which respectively realizing functions of visual management of emergency data, daily management of accident information, risk evaluation of a city natural gas pipe network, planning of emergency routes and query of emergency procedures of various accidents. A practical result indicates that the system has the characteristics of smoothness for running, simplicity for operation, multiple functions and the like, and provides technical supports for the risk evaluation and emergency decision-making of the city natural gas pipe network.
Owner:CHANGZHOU UNIV
Vehicle area recognizing method
InactiveCN101154316AAvoid crowdingRoad vehicles traffic controlMaps/plans/chartsRequirements managementGeographic information system software
The present invention provides a vehicle region identifying method based on component geographic information system, which is realized by a publicly known computer storing component geographic information system software. The computer also stores a region identification main program and a region identification subprogram, which are sued to accomplish the judgment whether the position of a vehicle is in some region or not. The present invention is applied to traffic demand management and used to judge whether the position of some vehicle is in a crowded region or road section, which provides technical support for realizing traffic demand management and solving urban traffic jam effectively.
Owner:CHINA AUTOMOTIVE TECH & RES CENT +2
Novel earthquake catalogue persistence and visualization method
InactiveCN105183942AReduce sizeVisual and intuitiveSpecial data processing applicationsGeographic information system softwareNetwork packet
The invention discloses a novel earthquake catalogue persistence and visualization method. The method comprises four basic steps of: 1, establishing earthquake catalogue metadata; 2, according to a query condition, determining corresponding earthquake visualization expression resources; 3, packaging a visualization earthquake catalogue mapping subset and the visualization expression resources in a KML or KMZ data package; and 4, reading, managing and controlling the packaged KML or KMZ data package by utilizing three-dimensional geographic information system software, thereby finishing the packaged earthquake catalogue visualization process. According to the method, the earthquake visualization expression resources are enriched, the visualization effect is intuitive, definite, clear and accurate, the packaged data interaction is realized by utilizing the three-dimensional geographic information system software, the visualization efficiency is improved, the space-time distribution law visualization of a large amount of earthquake catalogues is realized, and the convenience is provided for further discovering space-time evolution regularities of earthquake activities.
Owner:INST OF GEOPHYSICS CHINA EARTHQUAKE ADMINISTRATION
Method for measuring lightning shielding failure trip-out rate of high-voltage power transmission line by combining topography
The invention discloses a method for measuring a lightning shielding failure trip-out rate of a high-voltage power transmission line by combining topography. The method comprises the following steps of: acquiring related parameters of the power transmission line, dividing the power transmission line into a plurality of intervals according to a pole tower, dividing each interval into a plurality of small sections by adopting an equal division method, calculating longitude and latitude coordinates of each section and an auxiliary point vertical to each section through longitude and latitude coordinates of the pole tower, further acquiring altitudes of each section and the auxiliary point by adopting geographic information system software, finally calculating a ground inclination angle of each section according to the height difference and distance between the auxiliary point and the subsection point, and calculating the shielding failure trip-out rate of each section by using an electric geometrical model considering the striking distance coefficient and the ground inclination angle. The method can conveniently calculate the ground inclination angle at the pole tower of the power transmission line, reflect the actual topographical characteristics of a corridor of the power transmission line, and provide reliable basis for evaluating the lightning protection effect of a lightningwire of the power transmission line.
Owner:SOUTHWEST JIAOTONG UNIV
Dynamic route guidance method oriented to urban traffic
InactiveCN102169637BPowerfulReal-time avoidance of blocked road sectionsInstruments for road network navigationRoad vehicles traffic controlGuidance systemSystems research
The invention discloses a dynamic route guidance method oriented to urban traffic, relating to various optimal route planning methods in a geographic information system (GIS) and an intelligent traffic system. The method comprises the following steps: through taking a GIS (geographic information system) software product ArcGIS road model provided by the Environmental System Research Institute (ESRI) in America as the basis, loading a road traffic map of the Beijing city, simulating the operation efficiency of twelve route planning methods such as a PSP (play station portable), Dijkstra and soon in different road traffic conditions, and displaying the dynamic traffic information of major roads in real time to realize the presentation of the dynamic traffic flow information; and simulatingthe operation efficiency of different route planning methods in dynamic traffic condition by successfully applying the dynamic traffic flow information in the computation of the dynamic optimal route. The prototype system belongs to the field of transportation, and can be applied to the simulation experiment of the optimal route planning method in an intelligent transportation system, a vehicle navigation system and the GIS, thereby providing a reference and basis for the research on road guidance systems.
Owner:PEKING UNIV
Road network limitation capacity determining method based on pressure test
InactiveCN101364344BGuaranteed practicalityGuaranteed accuracyDetection of traffic movementSpecific program execution arrangementsTraffic capacityGeographic information system software
The invention relates to a road-net ultimate capacity determination method based on pressure measurement, which belongs to the field of road-net traffic capacity control techniques and which is characterized in that: the method comprises the following steps of adopting the observation network of a computer to collect the traffic parameters of a road net; adopting a macroscopic traffic simulation and planning software Cube and a geographic information system software ArcGIS to generate road-net files and initial values of pressure measurement in the computer; adopting the software Cube to generate a pressure measurement model which performs the pressure measurement in a preset measurement period; calculating the road-net average saturation and the road-net average velocity; comparing the two calculated valves to the preset index values of the road-net average saturation and the road-net average velocity; judging whether the calculated valves meet the preset requirements; and if either fails, increasing the road-net traffic capacity and continuing the pressure measurement until both meet the requirement; and determining the road-net traffic capacity at the time as the road-net ultimate capacity. The road-net ultimate capacity determination method increases the calculation accuracy, reliability and efficiency and fills the blank of determining the road-net ultimate capacity basedon pressure measurement.
Owner:BEIJING UNIV OF TECH
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