多制式区域轨道交通网络关键节点识别

Identification of key nodes in multi-mode regional rail transit networks

为提高多制式区域轨道交通网络(Multi-mocle Regional Rail Transit Networks,MRRTN)关键节点识别精度,提出MRRTN拓扑建模方法,将MRRTN关键节点分为结构性关键节点和系统性关键节点。构建基于熵权法和多准则妥协解排序法(VIsekriterijumska Optimizacija I Kompromisno Resenje,VIKOR)的节点结构重要度评价模型,识别MRRTN结构性关键节点;将客流因素引入重要度评价体系,利用蚁群聚类算法识别MRRTN系统性关键节点;基于网络效率指标验证识别方法的有效性。以重庆MRRTN为例进行关键节点识别与分析,给出对应节点保护建议。结果表明:不同类型关键节点对网络结构和网络运营产生不同影响;熵权-VIKOR法和蚁群聚类算法可以保证MRRTN结构性和系统性关键节点评价与识别的客观性;MRRTN可从一体规划设计、协同调度指挥和开展直通运营三方面进行优化。

This paper intends to improve the identification accuracy of key nodes in Multi-mode Regional Rail Transit Networks(MRRTN).Based on analyzing the characteristics of MRRTN,this paper proposed 3 key points for mapping the topology network of MRRTN.We intended to divide MRRTN key nodes into structural key nodes and systematic key nodes.Then,we proposed a novel method of node importance ranking,which is based on the Entropy Weight(EW) method and the VIsekriterijumska Optimizacija I Kompromisno Resenje(VIKOR) method to identify the structural key nodes in MRRTN.The passenger flow factors were introduced into the node importance evaluation system.Aiming at identifying the systematic key nodes in MRRTN,we proposed an identifying method via using an ant colony clustering algorithm.Finally,the identified results were tested by calculating network efficiency under intentional attacks.Taking MRRTN in Chongqing metropolitan as an example,we identified 15 structural key nodes such as Guanyinqiao and 15 systematic key nodes such as South Square of Chongqing North Railway Station.Besides,the corresponding protection suggestions for different types of key nodes were given.The results show that structural key nodes mainly locate on both interchange stations of the loop line and the radial lines and multi-mode interchange stations,while systematical key nodes mainly locate on downtown interchange stations with big passenger flow(including multi-mode interchange station and single-mode interchange station).Different types of key nodes have different effects on network structure and network operation.After removing structural key nodes and systematic key nodes respectively,the network efficiency decrease by 78% and 72%.The results also prove that EW-VIKOR method and ant colony clustering algorithm are valid for identifying MRRTN key nodes and guarantee the objectivity of the result.The MRRTN operators can optimize the operation performance of MRRTN from three aspects: integrated planning and design,collaborative scheduling and command,as well as organizing through operations.