The Complexity Research Of Public Traffic Networks

Complex network is a new research point in the last few years. Scientists found that more and more real networks had the characteristics of complex network. They worked a lot on the models, the error and attack tolerance, and the dynamic characteristics of complex networks. Traffic networks play an important role in our lives. The design and construction of traffic network have a concernful effect on the traveling of humans.The public traffic network is an important part of traffic networks. This paper combines the research of public traffic network with the research of complex network, and introduces the basic static characteristics of complex network to the public traffic network. It is proved that the public traffic network of Dalian has the small-world and scale-free properties, and we analyze the robustness and frangibility of public traffic network of Dalian.First, we construct the stop complex network model and the changing complex network model of public traffic network according to the actual public traffic data of Dalian. The two models reflect the nature topology character and the reachable of public traffic network.In the next part, we analyze the complex network's characters on the two public traffic network models. According to the basic static characteristics on the stop complex network model, we demonstrate the small world and scale free properties. The two properties may give some new projects and patterns to improve the developments of the traffic science and technology, and may have some suggests for the design and rebuilding of public traffic network.And at last, we make researches on the robustness and frangibility of urban transit network. We compare the robustness and frangibility on the stop complex network and the same size random network respectively, and also we make researches on the robustness and frangibility of the stop complex network for the random failure and attack. We find that the public traffic network doesn't have strong robustness for the random failure, but is very fragile for the attack.