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97 results about "Road grading" patented technology
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Grades, Highway. The term "grade" is used in several different ways with respect to roads and highways. The "sub-grade" lies beneath a roadway and is used as a supporting base. "Grading" a road means to smooth out the roadbed with earthmoving equipment during the construction phase.
Method for obtaining everage speed of city road section traffic flow
InactiveCN1937001AAvoid heavy dependenceAvoid the problems of imperfection and low reliabilityDetection of traffic movementEngineeringTraffic flow
The invention includes steps: (1) establishing corresponding table between number of road junction and name of road section; (2) discriminating and processing error data; (3) obtaining average speed of road section. Average time of travel on road section is equal to sum of average running time and average waiting time. Running length of vehicle is equal to length of road section minus length of vehicle queue at road section under average meaning. Roads are divided into rapid road, main road, secondary road, and branch road. Detecting speed on the spot obtains anticipant speed on different grades of road. Average running time is obtained from average running length of vehicle divided by anticipant speed on different grades of road. Based on M / M / 1 theory in queuing theory, the disclosed method obtains average waiting time. Based on length of road, average running time and average waiting time, the method obtains average speed on road. Features are: easy, quick and high reliability.
Owner:SHANGHAI JIAO TONG UNIV
Rapid path planning method
ActiveCN102435200AEfficient planningSave resourcesInstruments for road network navigationShort path algorithmRoad networks
The invention discloses a rapid path planning method comprising the following steps: (S1) establishing space sublayers for a road network according to a road grade, dividing mesh regions for each layer of road network, and establishing a topological structure of the road network according to road data; (S2) respectively carrying out lifting exploration on an initial position and a final position of a low-level road network, and searching a hop position entering a high-level road network; and (S3) planning a path between an initial hop and a final hop on the high-level road network according to a shortest path algorithm. In the invention, a navigation path is planned by using methods such as road mergence, two-way lifting exploration and the like, and the requirement of the traditional navigation system for rapidly calculating and planning the optimal path can be met.
Owner:GUANGZHOU HAIGE COMM GRP INC
Method for arranging network traffic flow detectors based on road network topological relation
The invention provides a method for arranging network traffic flow detectors based on a road network topological relation. Firstly, road sections in a road network are divided into road network inlet road sections, road network outlet road sections and road network internal road sections, traffic generation road sections are determined, and the number of needed least detection road sections is the sum of the number of the road network inlet road sections and the number of traffic generation road sections; then according to the intersection traffic flow conservation law, a road network flow conservation equation set is built; then detection priority ordering is carried out according to road levels and costs, and the reversed order of the priority order is used as a detection weight; finally the highest priority of a detection road section set is used as an optimization target, a detector arranging optimization model is built with the number of arranged detectors and the order of a detector optimization coefficient matrix as restraint conditions, and the greedy algorithm is used for solving to determine the optimal arranging positions of the detectors. Construction and maintenance cost of a road network traffic flow detection system can be lowered, and OD matrix investigation high cost and distortion assumption of a traveler path choice motion are avoided.
Owner:TONGJI UNIV
Data hierarchy and organization method and device capable of fast displaying road conditions
InactiveCN102818571ARapid positioningReduce memory overheadInstruments for road network navigationEngineeringData mining
A data hierarchy and organization method capable of fast displaying road conditions includes defining display levels of different road sections in map data according to road hierarchy information; then, combining the road sections with same index identifications into a road section according to index identifications of a road section coding schedule in the map data and performing thinning; establishing code corresponding indexes which can be rapidly and mutually searched between road condition display data and the road section coding schedule according to a unique index of road condition information; and finally, generating road condition display data according to the established code corresponding indexes and subjecting the road condition display data to partitioning organization to display the area road conditions.
Owner:BEIJING QIANTU FANGYUAN SOFTWARE TECH
Electric vehicle remaining driving range estimation method and device, storage medium and equipment
ActiveCN111216730AMileage Anxiety EaseComprehensive considerationVehicular energy storageBattery/fuel cell control arrangementDriver/operatorElectrical battery
The invention discloses an electric vehicle remaining driving range estimation method and device, a storage medium and equipment, and belongs to the field of electric vehicles. The method comprises the following steps: acquiring the remaining available power of a battery in real time; acquiring unit mileage power consumption according to the road grade and congestion degree of a travel path and the driving style of a driver; and calculating the remaining driving range according to the remaining available power and unit mileage power consumption of the battery. The influence rule of the drivingstyle of the driver, the road grade of a planned travel and the real-time congestion degree of the road condition on the travel energy consumption is comprehensively analyzed, and the unit mileage power consumption in the driving process of the electric vehicle is quantitatively predicted. According to the invention, the remaining driving range estimation method fusing the pedestrian, vehicle androad information is adopted, and more comprehensive factors are considered, so that the remaining driving range of the electric vehicle can be calculated more accurately, and the mileage anxiety of auser can be relieved.
Owner:SHANDONG UNIV OF TECH +1
A network-level road maintenance management decision-making system
PendingCN109711722AFacilitate maintenance decisionsBenefit target maximizationResourcesStatistical analysisStatistical Report
Owner:江苏北极星交通产业集团有限公司
Method for generation of typical road spectrum
ActiveCN102222141AConducive to dynamic response testRich frequency componentsSpecial data processing applicationsRoad engineeringOctave
The invention discloses a method for generation of a typical road spectrum, belonging to the technical field of road engineering and vehicle engineering. The method comprises the following steps: collecting the spatial domain data of a road pavement section and to form a spatial domain curve of the road pavement section, and then converting the spatial domain curve into a road spectrum curve by means of Fourier transform; operating a multi-octave pass band to filter the road spectrum curve; repeating the procedures above for all test roads to obtain all flat road spectrum curves and drawing the curves in the 8-grade road grading map of a double-log coordinate; and calculating the average values of all spectrum values in each octave and connecting the average values to obtain an overall typical road spectrum curve. The method can be used to generally evaluate and reflect the road pavement quality and evenness as well as the power distribution under different spatial frequencies. In addition, the method can grade the roads and perfom regional researches, and particularly has obvious advantages when being used for comparing and researching regional road differences in different regions.
Owner:CHINA AUTOMOTIVE ENG RES INST
Traffic circulation index building method with consideration to characteristics of urban road traffic network
The invention discloses a traffic circulation index building method with the consideration to the characteristics of an urban road traffic network, and the method comprises the following steps: S1, constructing an urban road network model; S2, calculating an influence factor; S3, calculating traffic state values of road segments; S4, calculating a weighting factor of each road segment; S5, calculating a density level coefficient of an area; S6, calculating a traffic circulation index value of the area; S7, evaluating the urban traffic state based on the traffic circulation index value; According to the invention, the road level, regional road network density, traffic node accessibility and connectivity of the urban road traffic network are introduced to an urban traffic circulation evaluation model, thereby solving a problem of the evaluation of the comprehensive circulation conditions of the urban traffic caused by the increasingly complex urban road network and the quick developmentof traffic.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Setting method for far guidance of road intersection minor road
The invention discloses a setting method for far guidance of a road intersection minor road, and belongs to the field of traffic control and traffic design. The used technical solution is that, in theintersection in which the grades of the intersected roads have the difference, the far guidance is performed to the minor road traffic stream, a traditional intersection organization mode is used forthe main road traffic stream, and far guidance geometrical parameters of the road intersection minor road are determined by calculating. The method specifically comprises the following steps: 1) determining the distance from the direction change position of the far guidance traffic stream to the intersection; and 2) determining the queuing lane length of the far guidance direction change trafficstream. Through the delay comparison of intersection vehicles before and after the far guidance, the far guidance channelization design of the minor road is proved to effectively reduce the vehicle average delay, relieve the traffic jam, and improve the operating efficiency of the intersection.
Owner:合肥庐阳科技创新集团有限公司
Urban traffic road section speed prediction method and system based on multi-road-section space-time correlation
ActiveCN111080029AMean absolute error reductionSmall absolute errorInternal combustion piston enginesDetection of traffic movementNerve networkSimulation
The invention discloses an urban traffic road section speed prediction method and a system based on multi-road-section space-time correlation. The method comprises the steps of acquiring the speeds ofthe latest p historical time points of all road sections in an optimal feature subset corresponding to a to-be-predicted road section; wherein p is a positive integer; and inputting the acquired speeds of the latest p historical time points into a pre-trained GRU neural network, and outputting the prediction speed of the (p + 1) th time point of the to-be-predicted road section. The prediction model quantitatively and dynamically considers space-time correlation among all road sections in a road network from the aspects of traffic parameters, road section connectivity, road grades and the like, and can select a road section subset which is beneficial to speed prediction of a road section to be predicted from the road network. The prediction model can realize accurate prediction of the speed of the urban traffic road section.
Owner:SHANDONG UNIV
Map road annotating method of navigation terminal
ActiveCN102419927AEvenly distributedAnnotation effect improvedMaps/plans/chartsData displayDensity distribution
The invention discloses a map road annotating method of a navigation terminal. The map road annotating method comprises the following steps of: displaying map data to be displayed on a screen of the navigation terminal; dividing the screen of the navigation terminal; judging and determining road information needing to be displayed; detecting the road information needing to be displayed; determining the annotation density of road names; and annotating the road names according to road grades. According to the map road annotating method, aiming at the problems of the commonly used annotating method, a grid searching method is improved by considering the density distribution of the road annotations when road annotations are displayed, thereby the optimized display effect is realized.
Owner:SPACE STAR TECH CO LTD
Method for determining grade allocation of urban roads
InactiveCN101576991AMeet travel needs"Fair traffic environmentData processing applicationsTrip distanceRoad grading
The invention relates to a method for determining grade allocation of urban roads, which is used for determining grade allocation ratio of the urban roads. The method comprises the following steps: firstly, determining parameters in a microscopic share ratio model of various traffic modes influencing the grade allocation, wherein the traffic modes at least comprise three motor vehicle traffic modes of automobiles, motorcycles and public buses; and then, according to a coupling relation between a priority trip distance of each traffic mode and a trip distance undertaken by each grade road, acquiring the trip distance of each traffic mode on each grade road, and finally acquiring the road grade allocation ratio suitable for the various traffic modes. Therefore, the technical proposal of the invention has the characteristics of comprehensiveness of giving attention to various motor vehicle traffic modes, objective and scientific properties of considering the coupling relation between the priority trip distance of each traffic mode and the trip distance undertaken by each grade road, and the like, namely the method for the grade allocation of the urban roads is more reasonable, achieves effective utilization of resources, and is convenient for people to trip.
Owner:SOUTHEAST UNIV
Road grade-based shortest route-planning algorithm
ActiveCN104406590AThe calculation result is accurateAccurate planning resultsNavigational calculation instrumentsShortest path planningAlgorithm
The invention relates to a road grade-based shortest route-planning algorithm. The road grade-based shortest route-planning algorithm comprises the following steps: firstly, data preparation and data preprocessing; secondly, road network hierarchical expression, wherein road network grade division and road grade-based hierarchical expression are included; thirdly, road network passing time calculation; fourthly, shortest route approximate calculation. According to the road grade-based shortest route-planning algorithm provided by the invention, a large number of experiments prove that the passing capacity of different grades of roads are taken into full consideration; the passing time is taken as a judgment standard; a calculation method is general; the results are more precise; in emergency rescue, if a fault road section in a rod network can be excluded by road detection information, the real-time passing speed is calculated by acquiring traffic flow, and the planning result is more accurate.
Owner:CHINESE ACAD OF SURVEYING & MAPPING
Road grade auto-mapping
InactiveUS20140244067A1Navigation instrumentsComputation using non-denominational number representationMarkov chainEngineering
Road grade is modeled over a region in which a vehicle is driven on roadways having a grade that varies over a plurality of predetermined grade ranges. A succession of grade values are generated while operating the vehicle at a predetermined rate, wherein each grade value identifies a respective grade range then being encountered. A Markov chain road-grade model is updated in response to the succession of grade values, wherein the model represents respective elements of probability in a matrix of transition events from each predetermined grade range to a respective next-in-succession grade range. Each element of the matrix has a value πi,j representing a weighted frequency of transition events from a first respective grade value to a second respective grade value divided by a weighted frequency of transition events initiating from the first respective grade value, so that the matrix successively approximates the road grade of the region.
Owner:FORD GLOBAL TECH LLC
Vehicle traveling road level precise division method
ActiveCN103680185ADriving road class is correctRoad vehicles traffic controlRoad gradingReal-time computing
Owner:XIAMEN YAXON NETWORKS CO LTD
Road data reduction and storage method suitable for real-time road condition broadcast
InactiveCN105466434AGood effectRapid positioningInstruments for road network navigationGeographical information databasesStructure of Management InformationElectronic map
The invention relates to the technical field of geographic position data processing, in particular to a road data reduction and storage method suitable for real-time road condition broadcast. The method comprises the following steps: (1) processing original navigation electronic map road data, that is, screening roads according to road grade names, screening roads according to the road forms and characteristics, enabling two-line roads to be single-line roads, recombining and carrying out road node compression; (2) building a three-layer road system structure according to the information of roads with the same names; (3) storing the processed road data in a geoJSON format document structure according to the road stratification system, wherein the geoJSON format document structure is applied to voice broadcast of road conditions and drawing of a simple road condition diagram. According to the invention, the road data in the navigation electronic map is simplified, redundant information is eliminated, and the road storage structure suitable for road condition broadcast is designed.
Owner:XIAMEN YAXON NETWORKS CO LTD
Path generation method and device, terminal equipment and storage medium
ActiveCN112801399AImprove accuracyImprove recallForecastingGeographical information databasesTopological graphSimulation
The embodiment of the invention provides a path generation method and device, terminal equipment and a storage medium, and is applied to the field of navigation maps. The method comprises the steps of obtaining the road attribute information of each road in a road set, determining the road grade of each road according to the road attribute information of each road, wherein the road set comprises N roads, and N is a positive integer; determining the road weight of each road according to the road grade of each road and the road attribute information of each road; according to the determined road weights of the N roads, constructing a road network topological graph, wherein the road network topological graph comprises N connecting edges corresponding to the N roads respectively, and the edge weights of the N connecting edges are in one-to-one correspondence with the road weights of the N roads; and when a path planning request is obtained, determining a target road between the road starting point and the road end point according to the road network topological graph, and outputting the target road. According to the invention, the road weight can be determined according to the road attribute information, and the accuracy of the road weight is improved.
Owner:TENCENT TECH (SHENZHEN) CO LTD
Intelligent automatic-conversion speed limitation board and speed limitation method
The invention provides an intelligent automatic-conversion speed limitation board and a speed limitation method. Currently, domestic road speed limitation boards are all fixed speed limitation boards arranged according to the road grades, and the limitation speed means a limitation speed under the normal meteorological condition. When weather is changed and the road vehicle travelling speed needs to be changed, displaying boards are arranged at an entrance of a highway for prompting generally. The intelligent automatic-conversion speed limitation board comprises an LED display (1), a solar cell panel (2), a rain falling sensor (3), a snow falling sensor (4) and a visibility sensor (5). The LED display (1) and the solar cell panel are fixed to a vertical column support (6) through fixtures, the vertical column support is connected with a rainfall holding board (8) and a visibility holding board (9) through clamps (7), and a snow falling sensor holding board (10) is arranged on the horizontal ground on one side of the vertical column support. The rain falling sensor and the snow falling sensor are placed on the rainfall holding board and the visibility holding board. The intelligent automatic-conversion speed limitation board and the speed limitation method are applied to speed limitation.
Owner:黑龙江盛世新宇高新技术开发有限公司
Lane line fusion and transverse control method and system, vehicle and storage medium
The invention discloses a lane line fusion and transverse control method and system, a vehicle and a storage medium. The method comprises the steps of acquiring guardrail information, road edge information, a lane line and a lane line confidence rate detected by a forward-looking camera; acquiring road edge information and guardrail information detected by a forward millimeter-wave radar; acquiring road edge information and guardrail information detected by a lateral millimeter wave radar; obtaining a road curvature and a road grade output by an ADAS map; acquiring a lane line detected by a look-around camera and a lane line confidence rate; fusing the lane lines based on the lane lines, the lane line confidence rate, the guardrail information, the road edge information, the road curvatureand the road grade, and outputting the fused lane lines, the types of the lane lines and the fusion confidence rate; and performing transverse control on the vehicle according to the fused lane lines, the type of the lane lines and the fusion confidence rate. When the lane line is lost, one lane line can be virtualized, and the system cannot be directly quitted, so that the continuity of controlcan be ensured, and the user experience is friendly.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
OD optimal path searching method and device based on layered road network
ActiveCN111027743AIn line with actual travel habitsImprove travel experienceForecastingSimulationRoad networks
The method is suitable for the technical field of traffic simulation, and provides an OD optimal path searching method based on a layered road network. The method comprises: determining a corresponding top layer starting point and a top layer terminal point of a target OD on a top layer road network, wherein the top layer road network is composed of road sections which are extracted from a targettraffic road network in advance according to historical travel track data and have travel frequencies and / or road levels higher than a set value; determining a shortest path from the top layer starting point to the top layer terminal point on the top layer road network to serve as a top layer path section; determining a shortest path from the starting point of the target OD to the starting point of the top layer on the target traffic road network as a starting point path segment; determining a shortest path from the top end point to the end point of the target OD on the target traffic road network as an end point path segment; and sequentially splicing the starting point path segment, the top layer path segment and the terminal point path segment to obtain an optimal path of the target OD.
Owner:SHENZHEN URBAN TRANSPORT PLANNING CENT
Determining method for traffic guidance road segment of urban variable information-identified ground
InactiveCN106816018AAvoid wastingAvoid dissatisfactionArrangements for variable traffic instructionsDetection of traffic movementEngineeringRoad grading
Owner:SHANGHAI SEARI INTELLIGENT SYST CO LTD
Noise map updating method combining speed and noise monitoring data
ActiveCN112463898ASubsonic/sonic/ultrasonic wave measurementGeographical information databasesNoise monitoringSimulation
The invention provides a noise map updating method combining speed and noise monitoring data, which comprises the following steps of: classifying roads in a static noise map according to road grades,and clustering each class according to road speed; calculating the variation of a noise value of each road caused by speed change by acquiring speed data of the road at an updating moment, and calculating the variation of the noise value of the monitored road caused by density change by combining noise monitoring data of each road; finally, calculating the variation of the noise value of each roadcaused by the density change according to the calculated variation of the noise value of the monitored road caused by the density change, calculating the variation of the noise value of each road relative to the static noise map moment under the current traffic condition according to the results of the two parts, and calculating the noise value of each road relative to the static noise map momentunder the current traffic condition; and finally, updating the whole noise map according to the updating result of the noise source and the noise propagation model.
Owner:SUN YAT SEN UNIV +1
Rapid path planning method
ActiveCN102435200BEfficient planningSave resourcesInstruments for road network navigationShort path algorithmRoad networks
The invention discloses a rapid path planning method comprising the following steps: (S1) establishing space sublayers for a road network according to a road grade, dividing mesh regions for each layer of road network, and establishing a topological structure of the road network according to road data; (S2) respectively carrying out lifting exploration on an initial position and a final position of a low-level road network, and searching a hop position entering a high-level road network; and (S3) planning a path between an initial hop and a final hop on the high-level road network according to a shortest path algorithm. In the invention, a navigation path is planned by using methods such as road mergence, two-way lifting exploration and the like, and the requirement of the traditional navigation system for rapidly calculating and planning the optimal path can be met.
Owner:GUANGZHOU HAIGE COMM GRP INC
Road optimization method and system, terminal and computer readable storage medium
PendingCN111553517AImprove the ability to solveInternal combustion piston enginesForecastingSimulationData visualization
The invention relates to the field of data visualization, and discloses a road optimization method and system, a terminal and a storage medium, and the method comprises the steps: obtaining the current spatial data of a to-be-optimized road, the current road grade, the historical flow of a person and / or a vehicle, and the spatial data corresponding to the impact factors of the to-be-optimized road; obtaining a demand level of the to-be-optimized road according to the current spatial data of the to-be-optimized road and the spatial data corresponding to the influence factors; judging whether the current road grade of the to-be-optimized road meets the demand grade of the to-be-optimized road or not; if not, generating a current three-dimensional model of the to-be-optimized road according to the current spatial data of the to-be-optimized road; and optimizing the current spatial data of the to-be-optimized road according to the current three-dimensional model of the to-be-optimized roadand the historical flow of people and / or vehicles to obtain optimized spatial data of the to-be-optimized road. According to the invention, the problem that a reconstruction scheme generated by adopting a pure numerical analysis method for a road is poor in congestion solving effect is solved.
Owner:PING AN TECH (SHENZHEN) CO LTD
Bridge structure optimization method and system based on vehicle load and intelligent equipment
PendingCN110909405AImprove the forceAvoid serious injuryGeometric CADInternal combustion piston enginesElement analysisStructural engineering
The invention discloses a bridge structure optimization method and system based on vehicle load and intelligent equipment. The bridge structure optimization method comprises the steps: obtaining the structure information of a to-be-optimized bridge, and building a finite element analysis model of the to-be-optimized bridge according to the structure information; according to the multi-lane distribution characteristics of the traffic flow and the road grade of the bridge, creating differentiated vehicle load standards and models of all lanes; loading the differentiated vehicle load model of each lane to a to-be-optimized bridge structure for analysis so as to determine bridge member response of each lane position; and determining the structure, the size and the material of the bridge memberat each lane position based on a target reliability least square error principle according to the bridge member response so as to obtain an optimized bridge structure of the current bridge, and carrying out a vehicle loading test on the optimized bridge structure of the current bridge. According to the bridge structure optimization method, the bridge components at all lane positions can have consistent reliability under the action of different lane loads, and the actual application requirements are met.
Owner:GUANGZHOU UNIVERSITY
Track-based method, device and equipment for identifying whether vehicle goes up and down at high speed or not, and medium
ActiveCN114664087ATicket-issuing apparatusDetection of traffic movementRoad gradingReal-time computing
The invention discloses a method, a device and equipment for recognizing whether a vehicle goes up and down a highway based on a track, and a medium. The method comprises the steps of obtaining track data, road data, toll station data and highway entrance and exit data of the vehicle; obtaining position information of the vehicle passing through a highway toll station, position information of the vehicle passing through a highway entrance and exit, average speed difference information and driving road grade information according to the obtained data; according to the position information of the vehicle passing through the highway toll station, the position information of the vehicle passing through the highway entrance and exit, the average speed difference information and the driving road grade information, whether the vehicle meets a preset high-speed getting-on condition and a preset high-speed getting-off condition or not is judged; when the vehicle meets the preset high-speed getting-on condition, it is determined that the vehicle gets on the high-speed at the high-speed entrance position, and when the vehicle meets the preset high-speed getting-off condition, it is determined that the vehicle gets off the high-speed at the high-speed exit position. According to the method, the vehicle can be accurately identified to get on and off the high speed only according to the trajectory data of the vehicle and the road data.
Owner:BEIJING TRANWISEWAY INFORMATION TECH
Method and device for predicting entry of vehicle into logistics park, storage medium and terminal
ActiveCN112598192AImprove management efficiencyImprove forecast accuracyEnsemble learningForecastingPredictive methodsRoad networks
The invention discloses a method and device for predicting the entry of a vehicle into a logistics park, a storage medium and a terminal. The method comprises the steps of obtaining a driving track point set of a to-be-predicted vehicle, and loading preset road network data; matching road data corresponding to tracks in the driving track point set from the road network data; the road data comprising the road grade of the road where each track is located and the distance between the located roads; sequentially inputting the road grades of the roads where the track points are located and the distances between the roads where the track points are located into a preset sliding window algorithm, and extracting track sequence features of the track points; and inputting the track sequence features of the track points into a pre-trained prediction model, outputting a probability value of entering the logistics park, and determining whether the vehicle enters the logistics park or not accordingto the probability value. Therefore, by adopting the embodiment of the invention, the behavior that the vehicle enters the park at a certain place can be effectively predicted according to the massive vehicle track data and the road network information, the prediction accuracy is improved, and the management efficiency of vehicles in the park is further improved.
Owner:北京优挂信息科技有限公司
Control method and control device for working condition of light energy street lamp
ActiveCN108012373AAchieve energy saving effectSensation of strong light changesElectrical apparatusElectroluminescent light sourcesTraffic flow analysisLight energy
The invention relates to the field of lighting street lamps, in particular to a control method and control device for a working condition of a light energy street lamp. The control method comprises the following steps of obtaining first road information of the light energy street lamp if current weather of an area in which the light energy street lamp is located is cloudy and rainy weather; querying a road grade table according to the first road information to obtain a first road grade corresponding to the first road information, wherein the road grade table is configured for storing road information and road grades corresponding to the road information one by one; collecting first traffic flow corresponding to vehicles passing on the first road information within a current time period andcarrying out analysis according to the first road grade and the first traffic flow to obtain first light intensity and first illuminating change duration; and controlling the working condition of thelight energy street lamp within the next time period in real time according to the first light intensity and the first illuminating change duration.
Owner:福建汉阳光能科技有限公司
Multi-scale aggregation mode analysis method for complex traffic network
InactiveCN114372117AGuaranteed connectivityImprove efficiencyData processing applicationsCharacter and pattern recognitionAlgorithmPagerank algorithm
The invention provides a multi-scale aggregation mode analysis method for a complex traffic network. The method comprises the following steps: firstly, calculating an adjacent matrix, a position attribute matrix, a distance weight matrix, a road grade matrix and a time-phased traffic congestion degree matrix of a road traffic network; secondly, adding a road network weight influence factor on the basis of an original PageRank algorithm to obtain an improved PageRank algorithm so as to determine a key node sorting condition; and finally, drawing a two-dimensional decision diagram through two indexes of key node sorting and shortest path distance, determining a spectral clustering center point and a clustering number, and adding a position, distance, road grade and dynamic traffic congestion degree weight matrix on the basis of a similarity matrix in spectral clustering to obtain a new weighting matrix conforming to an actual road network condition, and then carrying out clustering analysis to obtain a road network aggregation block. According to the method, the block aggregation characteristics of the road traffic network crossing the administrative division can be analyzed, and decision reference is provided for traffic planning, design work, maintenance work and the like.
Owner:NORTH CHINA INST OF AEROSPACE ENG +1
Road grading method based on fixed major hazard source and application thereof
PendingCN113435676ATimely evacuationScoring objectiveResourcesManufacturing computing systemsRisk levelClassification methods
The invention relates to a road grading method based on a fixed major hazard source and application thereof. The grading method comprises the steps: 1, obtaining road data of a to-be-evaluated road and data of a chemical industry park where the road is located; 2, performing explosion simulation on the fixedly stored hazardous chemical substance to obtain death radius data of a dangerous source; 3, obtaining a hazardous chemical substance influence degree index of the to-be-evaluated road and a comprehensive index of facility performance of the to-be-evaluated road; 4, obtaining a hazardous chemical substance influence degree weight W1 of the to-be-evaluated road and a facility performance comprehensive index weight W2 of the to-be-evaluated road; 5, performing weighted summation on the score and the weight of the influence degree and the facility performance to obtain a comprehensive index Z; and 6, obtaining the danger level of the to-be-evaluated road according to the value of the comprehensive index Z and the grading standard. Compared with the prior art, the method has the advantages that the road facility performance level and the influence of a fixed hazard source on the road are comprehensively considered, and road grading is more objective.
Owner:SHANGHAI PUDONG ARCHITECTURAL DESIGN & RES INST
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