基于人流-物流-信息流的成渝城市群网络结构特征研究

Networks Analysis of Chengdu-Chongqing Urban Agglomeration Based on Multiple Flows

基于流空间理论,以成渝城市群为研究区,利用多源大数据,构建以人流、物流、信息流为主要构成的综合流强度指数,借助社会网络分析方法进行网络中心性、核心-边缘结构、凝聚子群分析,识别成渝城市群网络结构特征,并提出相关优化建议。结果表明:①成渝城市群人流向单个节点城市集中的趋势最强,信息流次之,物流最弱,成都市和重庆市为人流、物流、信息流网络的双中心。②在综合流视角下,成都市的点度中心度最高,在网络中的主导地位高于重庆市;成都市和重庆市是网络-边缘结构中的2个核心城市;组成不同凝聚子群的节点城市之间呈现等级差异。建议从提升重庆市和成都市对外辐射能力、培育城市群次级中心城市、建立跨行政区协同发展机制、强化都市圈辐射带动作用4个方面促进成渝城市群空间结构优化。

Based on the theory of flow space,the research takes the Chengdu-Chongqing Urban Agglomeration as the research area,and uses multi-source big data to construct a comprehensive flow intensity index mainly composed of people flow,logistics,and information flow.Analysis of edge structure and agglomeration subgroup,identify the characteristics of spatial network structure of Chengdu-Chongqing Urban Agglomeration,and put forward relevant optimization suggestions.The results show that:Chengdu-Chongqing Urban Agglomeration has the strongest trend of concentration of people flow to a single node city,followed by information flow,and logistics is the weakest.Chengdu and Chongqing are the dual centers of people flow,logistics and information flow networks.From the perspective of comprehensive flow,Chengdu has the highest centrality of point degree,and its dominant position in the network is higher than that of Chongqing.Chengdu and Chongqing are the two core cities in the network-edge structure.There are hierarchical differences between node cities that make up different cohesive subgroups.It is suggested to promote the optimization of the spatial structure of the Chengdu-Chongqing Urban Agglomeration from four aspects:improving the external radiation capacity of Chongqing and Chengdu,cultivating sub-central cities of urban agglomerations,establishing a coordinated development mechanism across administrative regions,and strengthening the role of metropolitan radiation as a driving force.