长江中游城市群空间关联网络结构判断与层级划分

Structure Judgment and Hierarchical Division on Spatial Correlation Network of Urban Agglomerations in the Middle Reaches of the Yangtze River

空间关联网络是研究城市间相互作用及流动形态的主要方法,文章利用引力模型、百度指数和ArcGis系统对长江中游城市群的空间关联网络进行结构判断与层级划分,将城市群空间关联网络分为经济流网络和信息流网络两大块。结果显示:(1)长江中游城市群的经济流空间关联网络为两个支撑点的"屋脊"型网络结构,经济流空间关联受限于地理位置;(2)信息流空间关联网络属于类"四面体"结构,信息流空间关联突破了地理位置的限制,移动互联网扩大了信息流空间关联的基本框架;(3)经济流空间关联网络的层级特点为四个核心和两个副中心,信息流空间关联网络的层级特点为两个核心和一个副中心。武汉、长沙在长江中游城市群的空间关联网络中处于优势地位。

Spatial correlation network is the main method to study the interaction and flow pattern between cities.This paper uses gravity model,Baidu Index and ArcGis system to conduct structure judgment and hierarchical division on spatial correlation network of urban agglomerations in the middle reaches of the Yangtze River,and divides spatial correlation network of urban agglomerations into economic flow network and information flow network.The results are shown as follows:1)The economic flow spatial correlation network of urban agglomerations in the middle reaches of the Yangtze River is a"ridge"network structure with two supporting points,the spatial correlation of economic flow limited by geographical location.2)The spatial correlation network of information flow belongs to tetrahedral structure,breaking through the limitation of geographical location,and the mobile Internet expands the basic framework of spatial correlation of information flow.3)There are four cores and two sub centers in the hierarchy of economic flow spatial correlation network,while the hierarchical characteristics of information flow spatial correlation network are two cores and one sub center.Wuhan and Changsha are in a dominant position in the spatial correlation network of urban agglomerations in the middle reaches of the Yangtze River.