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

With the rapid urbanization in China, and the vehicle population continues to grow, the problem of traffic congestion is growing day by day. Bus Transportation is a convenient, economical and environmental friendly way of travelling, so it has become the key to solve these problems. The bus transportation system is a typically huge and complex system, traditional research methods are hardly to unity in macro and micro level. As a new method for the study of complex systems, the theory complex network is becoming increasingly used to study the problems of bus transportation system. Connectivity is an important index of the bus transportation system, the connectivity of a bus transportation system is directly related to the way people choose to travel. To evaluate the influence on which the stations act and then find the hinge stations is also a urgent problem.This thesis is based on the two way of modeling the bus transportation networks:the space L and space P, based on which an algorithm is proposed to calculate the shortest path length between bus stations with the consideration of the minimal transfer times. The algorithm is fulfilled on the platform Microsoft Visual Studio2010, then the two aspects of the bus transportation connectivity is analyzed:1. Put forward to use the efficiency based on the algorithm to evaluate the connectivity of the bus transportation networks;2. Put forward to use the betweenness to evaluate the influence stations on the connectivity of the bus transportation system.Lastly, this thesis collects the data of bus transportation system of Wuhan, with which the space L and space P are established. The static values of space L and space P are calculated, with which the complexity of Wuhan bus transportation network is proofed. The efficiency based on the minimal transfer times of Wuhan bus transportation system is calculated, compare with the one that don’t consider the minimal transfer times, it reduced31%, but the minimal transform time is guaranteed to be1.45. The betweenness is calculated, through the analysis, we can get:the influence of the station on the connectivity of the bus transportation is not related, but it is related to the transfer performance of the station.