信息流视角下长株潭城市群关系网络特征辨析及规划启示——基于百度指数的分析

Network Characteristics and Planning Enlightenment of Changsha-Zhuzhou-Xiangtan Urban Agglomeration from the Perspective of Information Flow: An Analysis Based on Baidu Index

以长株潭城市群为研究区域,构建基于2015~2017年城市群内各城市间的百度搜索指数信息流网络,探讨城市群的空间网络特征及其时空演变,发现其关系网络呈现两大主要特征:一是“点—轴”结构明显:城市核心网络以长沙为中心点,长―株、长―岳、长―衡、长―常为主轴,呈“Y”型分布;二是“核心―外围”趋势强化:长沙市是强控制力和强主导型城市,益阳市、娄底市其城市控制力和主导性呈现逐年下降的趋势,且城市的离散程度不断增大,城市间不均衡程度呈逐年上升趋势。研究对规划的启示在于:在城市群空间组织的研究与规划中,应关注城市间关联的内涵,通过多视角、多层次、多维度对城市群空间关系进行定量分析与定性辨析,以构建一个更加立体、更加系统、更加开放的“网络化”城市群。

Based on the Changsha-Zhuzhou-Xiangtan urban agglomeration as the research area the Baidu search index information flow network between cities in the urban agglomerations in 2015, 2016 and 2017 is constructed to explore the spatial network characteristics of the urban agglomerations and their temporal and spatial evolution. The network presents two main features: Firstly, the “point-axis” structure is obvious: the urban core network is centered on Changsha, and the Changsha-Zhuzhou, Changsha-Yueyang, Changsha-Hengyang, Changsha-Changde, are the main axes, showing a “Y” distribution. Secondly, the “core-periphery” trend is strengthened: Changsha City is a strong control and strong-oriented city. The city's control and dominantness in Yiyang City and Loudi City are declining year by year, and the degree of dispersion of the city is increasing. The degree of imbalance between cities is increasing year by year. The enlightenment of the research on planning is that in the research and planning of the urban group space organization, we should pay attention to the connotation of inter-city association, and we should quantitatively analyze and qualitatively analyze the spatial relationship of the urban agglomeration through multi-perspective, multi-level and multi-dimensional to construct a more “dimensional”, more systematic, and more open the"networked" urban agglomeration.