Research On Connectivity Reliability Of Urban Transit Network Based On Theory Of Complex Network

The urban transit is the most effective way to solve the problem of urban transportation system because of its large capacity, reliable, comfortable and so on. According to increasing proportion of urban transit in urban transportation system, it posed higher demand to the reliability and adaptability of urban transit.It has theoretical and practical significance to evaluate reliability of urban transit network which based on the theory of complex network. It can identify the key hub of urban transit network, which also can arouse attention to the fault of urban transit network. It can prevent intrusion and damage to urban transit network. It has an important impact on exploring the potential and on improving the reliability, service, attractive of urban transit network.The urban transit topology network has very important influence to the connectivity reliability of urban transit network. In this paper, we analysis the demographic characteristics of urban transit network from the perspective of complex network, and then evaluate the connectivity reliability of it which based on two different modes of attack. So we give a definition of connectivity reliability and establish efficiency as connectivity reliability. Finally, we give an application example of Beijing transit which has been proved that Beijing transit network is a typical scale-free complex network. When simulating under different modes of attack, we find that it has poor capability against attack, while stronger tolerant of failure. We also get a conclusion that Xizhimen, Dongzhimen and Lama Temple Station are the key hub of Beijing Transit by comparison of average path length in network.