A method and system for calculating the entropy of urban road traffic network based on the shortest path

A shortest path, road network technology, applied in the direction of road vehicle traffic control system, traffic control system, traffic flow detection, etc., can solve the problem of lack of reflection of the overall structural characteristics of the road network

Inactive Publication Date: 2019-07-23
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Most of the existing entropy calculation methods only consider one of the network characteristics, and lack the reflection of the overall structural characteristics of the road network.

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  • A method and system for calculating the entropy of urban road traffic network based on the shortest path
  • A method and system for calculating the entropy of urban road traffic network based on the shortest path
  • A method and system for calculating the entropy of urban road traffic network based on the shortest path

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0029] Reference figure 1 , An urban road traffic network entropy calculation method based on the shortest path, which is mainly divided into three levels: dynamic traffic network modeling module 103, shortest path set construction module 102 under different path lengths, road traffic network based on shortest path Entropy calculation module 101. The three parts have a hierarchical support relationship, that is, the dynamic road network model provides a platform for the construction of the shortest path matrix, and the shortest path matrix provides a basis for the calculation of the traffic road network entropy.

[0030] The dynamic traffic network modeling module, based on the urban road traffic network topology data and real-time dynamic traffic flow data, establishes a dynamic road network model with intersections as points, road sections as sides,...

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Abstract

The invention provides an urban road traffic network entropy computing method and system based on the shortest path. The method is characterized by taking all the shortest paths in a road network and traffics on the paths into account; computing, by calculating the shortest path between each node pair in the road network and the number of sides covered by the shortest path, the average traffic on the sides; constructing an average traffic matrix under the different shortest path lengths; and according to the Shannon information entropy formula, calculating the network entropy under different shortest path lengths so as to evaluate and analyze the structural characteristic of the road network.

Description

Technical field [0001] The invention relates to the field of complex network and traffic road network complexity evaluation, in particular to an urban traffic road network entropy calculation method based on the shortest path. Background technique [0002] Urban traffic road network is an important factor affecting urban development and urban traffic. The topological structure of the road network determines many properties of the road network, and entropy is a physical quantity that can measure the orderliness of the network. The more orderly the network structure, the greater the entropy. low. The current network entropy calculation methods can be roughly divided into two categories. One is based on information theory, and the other focuses on reflecting the characteristics of the network structure. Through the characteristics of the node degree, betweenness, and shortest path length in the road network, different functions can be constructed to calculate the path. The entropy ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01
CPCG08G1/0125
Inventor 张尊栋张昭然周慧娟刘小明郑国荣马维馨
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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