皖江城市带经济联系网络时空格局分析

On the Spatio-Temporal Pattern of Economic Connection Network in Wanjiang Urban Belt

以皖江城市带为研究对象,同时将长三角区域具有代表性的7个市纳入研究区域内,截取2007、2013、2019年3个时间节点,按照点(城市潜能)-线(经济联线)-面(经济网络)的框架,借助修正引力模型、城市潜能模型、社会网络等分析其城市经济联系强度、形态、差异和网络等特征,刻画出皖江城市带与长三角重点城市之间的经济联系时空格局演化。结果表明:皖江城市带城市潜能在“递进演化”的同时,分异特征愈加明显,空间格局具有显著的“马太效应”;皖江城市带主、次联线总体上呈现出以核心城市为中心的延伸态势,城市间经济网络密度不断加大,但皖江城市带内城市间的经济联系联系密度要大于与长三角区域间的经济联系密度。皖江城市带网络结构趋于复杂且呈扩张趋势,但经济联系并没有完全突破省域界线,与长三角其他城市还处于弱联结状态,特别是铜陵、池州等市。未来应充分发挥核心城市的辐射作用,促进皖江城市带内外部区域经济互动,实现协同共生发展。

Taking the Wanjiang urban belt as the research object,including the 7 representative cities in the Yangtze River Delta region into the research area,intercepting 3 time nodes in 2007,2013 and 2019,according to point(urban potential)-surface(economic connection network)framework,with the help of modified gravity model,urban potential model,social network,the author analyzes the characteristics of urban economic connection strength and depicts the evolution of the temporal and spatial pattern of economic connections between the Wanjiang urban belt and the key cities in the Yangtze River Delta.The results show that:while the urban potential of the Wanjiang urban belt is"progressively evolving",the differentiation characteristics become more obvious,and the spatial pattern has a significant“Matthew Effect”;the main and secondary links of the Wanjiang urban belt are generally present with the extension of core cities as the center,are the density of inter-city economic networks is increasing,but the density of economic connections between cities in the Wanjiang urban belt is greater than the density of economic connections with the Yangtze River Delta region.The network structure of Wanjiang urban belt is becoming more complex and expanding,but the economic alliance has not completely broken through the provincial boundary,and it is still weakly connected with other cities in the Yangtze River Delta,especially Tongling,Chizhou and other cities.In the future,we should give full play to the radiating role of core cities,promote the economic interaction between the internal and external regions of the Wanjiang city belt,and achieve coordinated and symbiotic development.