Study On The Topology Of The Urban Rail Transit Network And The Recognition Of Important Station

As a kind of large freight volume,comfortable and fast way to travel,urban rail transit has became one of the most effective ways to ease the problem of traffic.At present,urban rail transit has rapidly developed in China,and many cities has planed to establish unban rail transit.Therefore,fully understand the network structure of urban rail transit has very important practical significance.This article selects ten rail networks of C hina as the research object,and constructs network topology respectively,and then ana lyzes the characters of macroscopic,microscopic and the stability.At first,this article concluded the transfer and connected characteristic of network unit according to analyze the indicators of different network unit.It turned out that “triangle + triangle” and “triangle + ring” structure were more perfect structure combinations.And then this article selected ten rail networks of China as the research object,and constructs network topology respectively,and then analyzed the characters of macroscopic,complex network and the stability.In terms of macroscopic characteristics,this article reached the development level,development mode of the ten networks by analyzing the complexity,connectivity,extensibility indicators of line networks.Analysis results show that most of the cities are in the first stages of development in our country,and the development mode is divided into regional access type and center intensive type.At the aspect of complex network feature,this article arrived at the inherent law of development,according to analyze the indicators of degree and degree distribution,average path length,and clustering coefficient.Research found out that the structure of urban transit network have scale-free and small-world network property.And found out that the attitude to the large transfer station is the internal factor influencing development mode of urban rail transit network;At the aspect of stability,this article analyze the change of connected characteristic when the network was attacked.Results indicated that just expand the scale of the line network cannot improve the stability,and the network who has large transfer station has better stability to face deliberate attack.At last,this article introduced the average transfer times and improved the Page Rank algorithm.And then using techniques such as cluster analysis to output the important stations.This techniques took into account degree,betweenness indexes and Page Rank value.And then this article verified its applicability.The recognition of the important site can make the planning and management more specific.