中文摘要：

长江中游城市群是涵盖武汉城市圈、环长株潭城市群、环鄱阳湖城市群为主体形成的特大型城市群,承东启西、连南接北,是长江经济带三大跨区域城市群支撑之一,将成为中国经济增长的第四极,在我国区域发展格局中占有重要地位。研究采用引力模型和社会网络分析方法,测算2013年长江中游城市群中各城市间的经济联系,分析各个城市在经济网络中的节点中心性、中心城市影响范围并划分城市群次区域。研究结果表明：长江中游城市群的经济联系网络已形成了＂武汉—长沙＂双中心结构,武汉和长沙的影响腹地范围较广,而南昌的中心城市地位还有待强化;武汉城市圈和环长株潭城市群的城市之间经济联系较为紧密,已形成由中心往外辐射的圈层结构,环鄱阳湖城市群城市之间联系相对较弱;长江中游城市群的三个子城市群之间的经济联系强度不够,三圈融合过程仍需进一步加强。在此基础上,从提升经济联系网络的角度为促进长江中游城市群经济协同发展提出了相关政策建议。

英文摘要：

Mainly composed of Wuhan City Circle,the Circum-Chang-Zhu-Tan urban agglomeration,and the urban agglomeration around Boyang Lake,the urban agglomeration in the middle reaches of the Yangtze River will become the fourth pole in China＇ s economic growth and play an important role in China＇ s regional economic development pattern,with its convenient location and transportation. Based on gravity model and social network analysis method,this study measures intercity economic linkages in the urban agglomeration in the middle reaches of the Yangtze River,analyzes network node centrality of each city and influencing ranges of central cities,and divides the urban agglomeration into several sub-regions. The research results demonstrates the following features：First,the economic network of the urban agglomeration in the middle reaches of the Yangtze River has formed a 2- center（ Wuhan and Changsha） structure,among which Wuhan and Changsha cover wide hinterland areas while Nanchang＇s role as a central city needs to be strengthened; Second,intercity economic linkages in Wuhan City Circle and the Circum-Chang-Zhu-Tan urban agglomeration are tight with a layer structure decreasing outward from central cities,while relatively weak economic linkages exist between cities in the urban agglomeration around Boyang Lake; Last but not least,the economic linkages between 3 sub urban agglomerations show inadequate strength,so the integration process of these 3 sub urban agglomerations needs to be enhanced. Based on the research results,we put forward related policy suggestions for promoting the economic coordinated development of the urban agglomeration in the middle reaches of the Yangtze River,from the perspective of improving the economic network.