摘要本文使用社会网络分析法，以长三角城市群29个城市作为样本，从网络密度、中心性和凝聚子群三个角度出发，对高铁背景下长三角城市群空间结构的优化进行分析。分析后的结果表明：长三角城市群的整体网络密度提高的非常之快；城市群中的城市，不管是点入还是点出的度数都在增长，城市间人才、信息、资源等流动加快；网络中心势下降缓慢，点入度中心势较稳定，长三角城市群的经济联系并不对称和均衡；长三角城市接近中心度在提高，城市间联系愈加密切；城市的中间中心度总体水平较低且还在下降，中心城市相对于之前，已不处于绝对核心的位置，并且交通网的结构愈加均衡；长三角城市群根据凝聚子群的定义来看可分为4个，大部分的子群间联系强度大于城市群整体的网络密度；高铁的建成和通车，优化了长三角城市群空间结构。58557

毕业论文关键词：高铁背景；长三角城市群；空间结构；社会网络分析

Research on the Optimization of the Spatial Structure of the Yangtze River Delta City Group in the High-speed Rail Background

 Abstract Taking the 29 cities in the Yangtze River Delta city group as a sample, from the network density,centrality and condensing subgroup, analysis the characteristic evolution of the spatial structure in the Yangtze River Delta city group in the high-speed rail background. The results of the social network analysis: The network density in the Yangtze River Delta city group is increasing quickly; the out degree and in degree in each city are on the rise, the external radiation of center cities enhance; network centralization has a slow downward trend, city group exist asymmetric and unbalanced phenomenon; The close centrality of city increased year by year in the city group, the contact among cities become more closely; The betweenness centrality showed a downward trend year by year in the city group,network structure gradually tend to the equilibrium; The Yangtze River Delta city group is pided into 4 sub-groups, the association strength between subgroups is greater than the density of the whole network. Since the completion of high-speed railway, the spatial structure of the Yangtze River Delta city group has been optimized.

Keywords：the high-speed rail background; the Yangtze River Delta city group; spatial structure; social network analysis

0引言 1

1城市群空间结构 2

1.1城市群空间结构及其要素 2

1.2城市群空间结构演变过程 3

2高铁背景下的模型构建 4

2.1社会网络分析模型 4

2.2经济联系引力模型 4

2.3城市群空间联系强度 5

3高铁开通前后的社会网络分析 6

3.1 网络密度分析 6

3.2中心性分析 8

3.3凝聚子群分析 12

3.4总结分析 13

4长三角城市群空间结构优化建议 14

4.1优化资源配置 14

4.2打造一区两点 14

4.3完善边缘城市对外交通设施 15

结论 16

致谢 17

参考文献 18

高铁背景下长三角城市群空间结构优化研究