关键词: 交通运输工程, 轨道交通线网, 复杂网络, 二阶张量, 网络特性, 节点重要度

Abstract: The construction of rail transit network is becoming more and more complex, and the research on its key nodes and important transit stations is of great significance. The complex network theory was used to study the network topology and node importance of rail transit network. Firstly, the topological structure model of rail transit network based on second-order tensor was constructed. Then, the feature indexes such as the degree, degree distribution, network diameter, average path length and clustering coefficient of the model were analyzed, and the network node importance was evaluated by three central indexes. Finally, the proposed method was validated with Chongqing rail transit network as an example. The results show that in the long-term complex network of Chongqing rail transit — “Seventeen Lines and One Ring”, only 4% of the stations are directly connected with another station, and the connectivity of the network is quite good. The four stations of Wulidian, West Chongqing, Shapingba and Ranjiaba have the greatest impact on the connectivity of the network.

Key words: traffic and transportation engineering, rail transit network, complex network, second order tensor, network characteristics, node importance