关键词: 长江三角洲, 战略性新兴产业, 城市网络, 社会网络分析, 空间结构

Abstract:

The spatial network structure of the Yangtze River Delta urban agglomeration is investigated using the social network analysis model based on the strategic emerging industries’ listed companies data in 2004-2013. Major findings are as follows：Firstly, the traditional “Z”-shaped backbone of the Yangtze River Delta’s city network turned into pyramid-shape which is anchored by Shanghai, Nanjing, Hangzhou, Hefei and Ningbo. Recent years have witnessed the accelerated growth in network linkage density of the Yangtze River Delta urban agglomeration. The city network structure is obviously polycentric and the centralization level has been constantly increasing. Various network linkage patterns coexist in the Yangtze River Delta urban agglomeration. Secondly, core node cities have played increasingly important roles in resources allocation. Provincial capitals and sub-provincial cities show overwhelming advantage of resources agglomeration and radiation in the urban network, but a U-shaped pattern can be found in their betweenness centrality. Thirdly, Shanghai, Nanjing, Hangzhou, Ningbo, Suzhou, Hefei constitute the core layer of the Yangtze River Delta’s city network and the linkage between core cities and peripheral ones has become the dominating pattern. The member structure of cohesive subgroups presents obviously regional trend. Shanghai-Nanjing cohesive subgroup and Hangzhou cohesive subgroup are the leading one in the field of intra-subgroup linkage and inter-subgroup linkage respectively.

Key words: the Yangtze River Delta, strategic emerging industries, city network, social network analysis, spatial structure