关键词: 复杂网络, 国家高速公路, 拓扑特征, 脆弱性, 小世界, 无标度

Abstract:

In order to investigate the performance of the latest Chinese Planned Controlled Access Highway Network (CAH-NET), A modeling method in Space-P was proposed, a composite importance index for nodes was introduced, and a vulnerability analysis approach based on node failures guided by this index was presented in this study. Based on the data from the 2022 National Highway Network Planning, the CAH-NET model was constructed, and its static topological characteristics as well as network vulnerability under various attack strategies were analyzed. Results show that the current CAH-NET exhibits typical small-world and scale-free properties, with good overall accessibility. The top rankings for node degree, centrality, and composite importance are mostly occupied by cities in the eastern coastal areas or key central hub cities. The vulnerability of network is slightly affected by random attacks. About 90% of nodes t need to be attacked to completely destroy the CAH-NET. Among intentional attack strategies, the connectivity of network declines most quickly. When the proportion of nodes attacked through the betweenness centrality attack strategy reaches about 30%, the network totally collapses.

Key words: complex networks, Chinese controlled-access highway network, topological characteristics, vulnerability, small-world, scale-free