市区公路交通网络特性及鲁棒性

Characteristics and robustness of urban road traffic network

为研究市区范围内交通网络是否合理,解决鲁棒性强弱等问题,采用随机攻击策略和蓄意攻击策略分析网络特性和鲁棒性方法,揭示出市区内公路交通网络的拓扑特性和鲁棒性特点,并选取沈阳市为试验区,研究其网络特性和鲁棒性.实验结果表明:沈阳市公路交通网络具有较小的连接任意路段节点之间的平均路径长度,表现出小世界特性和无标度网络特性,路段节点之间连接的紧密程度较大,对随机攻击策略有较强的鲁棒性和对蓄意攻击策略较强的脆弱性(较弱的鲁棒性),符合无标度网络特性.

In order to research whether the Road Traffic Network(RTN)within the urban area is reasonable and robustness and to solve the problems of robustness,Random Attack(RA)strategy and Deliberate Attack(DA)strategy are used to analyze the network characteristics and robustness,the paper reveals the topological characteristics and robustness of the road traffic network in urban area,and selects Shenyang as the experimental area.The experimental results show that the road traffic network of Shenyang has small average path length between arbitrary section of nodes connected,showing the small-world and scale-free network characteristics,the larger tightness degree of the link connection between nodes,the strong robustness against RA strategy and strong vulnerability against DA strategy(weak robustness),which conforms to the scale-free network features,and complies with scale-free network characteristics.The conclusion is that the RTN is generally scale-free and the robustness of RA is stronger than that of DA.