关键词: 无标度网络, 脆弱性, 鲁棒性, 城市道路交通

Abstract:

To learn the structure and network characteristics of urban road transportation network, we employ original method to construct a model based on practical topological data and traffic flow data. We construct urban road transportation network model with an intersection as an abstract vertex and a road as an abstract network edge. Through MATLAB and pajek computation, we analyze statistical characteristics of road abstract network, infrastructure network and dynamic traffic network. Strength distribution analysis of infrastructure network and dynamic traffic network demonstrate that such two Beijing urban road networks are all scalefree networks. By such characteristic indexes as vertex strength and the betweenness of the infrastructure network, we acquire the important intersections and road segments of Beijing city. We eventually analyze the important statistical characteristics of the three networks in different network failure conditions through simulations. Results show that the infrastructure network and dynamic traffic network of Beijing urban roads are of both robustness and vulnerability.

Key words: robustness, urban road transportation, scalefree network, vulnerability