城市群首位城市的联系能级、中心度和控制力

Inter Connection, Centrality and Power of Primate City Within City Cluster

首位城市与周边城市不同的联系方式决定了城市群的内部结构。提出从中心度和控制力角度认识城市群内部结构。对我国12个城市群内部各城市之间建立联系矩阵;通过联系矩阵寻找联系路径、建立联系结构;在联系结构基础上,计算各城市群内部首位城市的中心度和控制力,分析城市群内部首位城市功能。结果显示,我国城市群内部联系度普遍不高,由现代服务业经济活动组成的联系结构较为松散,尤其是首位城市与周边城市之间的二级联系缺乏,除长三角城市群外,各城市群内部对首位城市依赖度过高,普遍缺乏对首位城市功能的"替代效应",从而导致首位城市对资源的分配和调节能力弱而控制力过强,城市群发育受阻。

The relationship between the primate city and surroundings determines the inner structure of an urban cluster. The authors proposes a method to identify city cluster structure with centrality and power together. This paper sets up twelve matrix frames to describe the inner relations among cities for each city cluster in China in order to find the paths of these relations and make their connecting structures. Based on these connecting structures, the centralities and powers of their primate cities have been calculated, and the functions of the twelve primate cities in their corresponding city clusters have been analyzed respectively. Results show that the inner relations among cities are generally low; the structures of city clusters are loose by modem service sector. Particularly, the relations at the second level are missing. Except for the city cluster in The Yangtze River Delta, other city clusters have over dependence on their primate city, no significant substitution effects for the primate cities among these city clusters. These kinds of structures result into the primate cities have weak distribution and regulation capabilities for resources, but strong power to control them, which becomes the block of health city cluster growth.