北京市公共交通网络系统的鲁棒性研究

The Robustness Research of Beijing Public Traffic Network System

作为城市生产、生活的重要支撑,城市公共交通系统应具备一定的鲁棒性以保证系统的高效运行。本文通过复杂网络建模,运用主成分分析方法综合多个指标,分析公共交通站点的重要程度,并从正序攻击、倒序攻击两个角度讨论北京市复合公共交通网络系统的鲁棒性。结果表明,北京市复合公共交通网络呈现无标度特性,而且公共交通站点的重要度能够用一个指标进行描述。此外,一组对照性攻击实验表明,正序攻击对公共交通网络的连通性和效率的影响极大,倒序攻击的影响则极小,亦说明所建立的重要度指标合理可行。

As the important support in city life and production,urban public traffic system should have robustness to ensure the efficient operation of traffic and transportation. Based on complex network model this study investigates the importance of public traffic stations by applying principal component analysis to process multiple indicators. Then it employs positive sequence attack and negative sequence attack to discuss the robustness of the composite public traffic network system of Beijing. The results show that the composite public traffic network system of Beijing presents scale-free feature,and the importance of public traffic stations can be described by one single indicator. In addition,a set of controlled attack experiments indicate that the positive sequence attack has prominent impact on the efficiency and connectivity of the traffic network system,on the contrary negative sequence attack has minimal influence.