西安公共交通系统的网络特性和鲁棒性分析

Research on Complex Network Characteristics and Robustness of Xi′an City Public Transport System

基于复杂网络理论,构建西安市公交、地铁及两者综合构成的复合网络的Space L模型,对比分析3类网络的统计特性,并从蓄意攻击和随机攻击两方面对3类网络的鲁棒性进行对比评价.结果表明:3类网络均不属于小世界网络,网络效率较低;地铁网的度近似服从泊松分布,公交网和复合网络的度服从幂律分布;地铁网的度和介数具有较强的正相关性,公交网则基本没有相关性,复合网络具有较弱的相关性;3类网络对随机攻击具有较好的鲁棒性,对蓄意攻击表现出较大的脆弱性.

The Space L model of subway network,bus network and bus subway interdependent network of Xi′an City were established based on the complex network theory.The statistical characteristics of three networks were analyzed.The robustness of three networks were compared and evaluated from two aspects:deliberate attack and random attack.The results show that the efficiency of three networks is low and they don′t belong to small world network.The degree of subway network is approximately poisson distribution,and the degree of bus network and interdependent network conform to power law distribution.The correlation between degree and betweenness of the subway network has a strong positive correlation,the interdependent network has a weak correlation,and the bus network is basically no correlation.Three networks have good robustness to random attacks,and show serious vulnerability to deliberate attacks.