Study On Network Characteristics And Key Station Identification Of Chongqing Urban Rail Transit Network Based On Passenger Flow

The characteristics of rail network topology and the distribution of passenger flow are the main factors affecting the operation and management of rail network.With the vigorous construction of urban rail transit,the rail transit system in China's major cities is gradually developing into a network.Traditional graph theory is difficult to satisfy the analysis of the above two factors at the same time.Complex network theory has gradually become the main tool to analyze the characteristics of rail transit network.At present,the research on the characteristics of rail network is mainly based on the analysis of network topology,without taking into account the passenger flow factors.Based on the above situation,this article is based on traffic network study on characteristics of rail weighted network in Chongqing,the Chongqing municipal rail network node important degree sorting,identification of key nodes in the network,of Chongqing rail network structure optimization,the construction of Chongqing rail transit network site classification management system,reasonable allocation of resources has important significance.Specific research content is as follows:Firstly,based on Space L,this paper constructs the topological structure model of Chongqing track network,and uses Pajek complex network analysis software to make statistical calculation of the complex network characteristic indexes of Chongqing track model.Through the analysis of network degree and distribution,clustering coefficient,average path length,network diameter and other characteristic indexes,it is found that the tail of the rail network degree distribution obeys the power distribution,which verifies that the rail network of Chongqing has scale-free characteristics and small-world characteristics.Then,Chongqing rail network weekday morning peak hour passenger flow data in 2017 is introduced as the weight to establish a model of Chongqing rail network.Through the statistical analysis of the weighted network point strength and its distribution,aggregation coefficient and weighted node number index,?the relationship between the passenger flow distribution and the network topology in Chongqing rail transit network was further explored.?the number of orbital weighted network mediators and the point strength show a relatively obvious positive correlation.?the station with a small degree value may also have a large passenger flow,which also plays an important role in the rail network.In addition,from different perspectives,degree value,tightness,medium and connection strength are selected as evaluation indexes to build a comprehensive evaluation and analysis model of node importance degree of Chongqing rail transit network.TOPSIS comprehensive evaluation method was used to analyze and rank the importance of rail network sites in Chongqing.The research shows that the top three stations of Chongqing railway network are Hong Qihegou,Niu Jiaotuo and Liang Lukou.Finally,according to the comprehensive evaluation index of importance degree,k-means method is used to cluster and analyze the rail transit network sites in Chongqing.The rail stations are divided into four categories,which are traffic distribution hub sites,urban center sites,urban secondary center sites and general passenger and landing sites.It provides a theoretical basis for the construction of the hierarchical management system of Chongqing rail transit network sites.