城际铁路线网站点及线路的脆弱性分析

Study on Vulnerability of Inter-city Rail Net Stations and Sections to Attack

为改善城际铁路线网的抗攻击能力,运用复杂网络相关理论,借助Matlab程序,分析并找出城际铁路线网中脆弱的站点及线路路段。将城际铁路线网抽象为由车站和线路所构成的非加权无向网络,并对网络的特性指标进行分析。提出网络效率和连通度2个脆弱性指标,及全局依次攻击和局部单独攻击2种蓄意攻击策略,并观察攻击前后脆弱性指标的变化情况,以确定网络中脆弱的站点。在此基础上,确定脆弱的线路(路段)。结果表明:站点的脆弱性与站点度数不直接相关;线路的脆弱性与线路所连接站点的脆弱性也不直接相关。

In order to improve the anti-attack capability of inter-city rail net,complex network theories and programming Tool MATLAB were used to identify the vulnerable stations and sections in the net.Firstly,the inter-city rail net was Abstracted as an unweighted and undirected network composed of stops and inter-city rail lines.Then characteristic indexes of the net were analyzed.The indexes for analyzing network vulnerability-global network efficiency and network connectivity,and two attack strategies-cumulative attack and separate attack were put forward.Through observing the change of vulnerability indicators before and after the attacks,the net＇s vulnerable stations and sections were determined.The calculation results indicate that the vulnerability of one station doesn＇t have a direct relation with its degree of connectivity and the vulnerability of one section also doesn＇t have a direct relation with the vulnerability of the stations it connects.