基于腾讯人口迁徙数据的成渝城市群网络结构特征研究

Research on Characteristics of Network Structure ofChengdu-Chongqing Urban Agglomeration Based onTencent Population Migration Data

基于春运期间腾讯人口迁徙数据,用人口迁徙热度对城市间联系进行表征,运用社会网络分析方法借助Ucinet软件对成渝城市群网络结构特征从网络密度和凝聚子群、城市群内部等级结构、城市群空间结构3个方面进行分析。研究发现:成渝城市群整体网络密度为78%,但是区域分布不均,西密东疏;城市群内部成都、重庆极化效应显著,成都辐射作用大于重庆,研究区城市分布层级呈现成都、重庆“双核独大”导致“中部塌陷”的格局;城市群空间结构呈双核心圈层放射状,核心一边缘分布特征明显,城市群处于成长期阶段。文章从人口流动视角切入,利用城市大数据开展城市群网络分析,极大地丰富了城市群研究手段,对认识城市群内部城市体系构成具有重要意义,为城市群空间布局优化提供理论指导。

Based on the migration data of Tencent population during the Spring Festival,the relationship between cities is characterized by the migration enthusiasm of the population.The social network analysis method is used to analyze the network structure characteristics of the Chengdu-Chongqing urban agglomeration from the network density and cohesive sub-groups,the internal hierarchical structure of the urban agglomeration,and the city.The three aspects of the group space structure are analyzed.The study found that the overall network density of Chengdu-Chongqing urban agglomeration is 78%,but the regional distribution is uneven,and the west is densely distributed.Chengdu and Chongqing have significant polarization effects within the urban agglomeration.The radiation effect of Chengdu is greater than that of Chongqing.The urban distribution level of the study area is Chengdu.Chongqing's"dual-nuclear independence"led to the pattern of"central collapse";the spatial structure of urban agglomerations was radial in the double-core circle,and the core-edge distribution characteristics were obvious,and the urban agglomeration was in the growth stage.From the perspective of population mobility,the article uses urban big data to analyze the urban agglomeration network,which greatly enriches the research methods of urban agglomerations,and is of great significance for understanding the urban system structure of urban agglomerations,and provides theoretical guidance for the optimization of urban cluster spatial layout.