中国三大城市群内部城市网络联系特征分析——比较与启示

Analysis on Characteristics of Inter-city Network Connection of the Three Major City Groups——Comparison and Enlightenment

城市群已成为区域经济发展的重要载体和国家参与国际竞争与分工的基本经济单元,而城市群内部城市网络联系特征对城市群内部产业布局、城市间功能分工、城市群整体集聚经济的实现程度均产生重要影响。基于修正后的引力模型,文章以长三角、京津冀和珠三角三大城市群为研究对象,分析了城市群内部城市间的网络联系特征,并据此对城市群内部城市的等级结构进行了划分。结果表明:城市之间经济联系强度受交通时间距离支配;各城市群内部城市间网络联系特征差异明显;各城市群内部城市的等级结构存在不同程度的断层。

City group has become an important carrier of regional economic development and the basic economic unit for a nation's participation in global competition and division of labor.The characteristics of the inter-city network connection of a city group have great influences on its industrial layout,division of urban functions,and the degree of realization of its agglomeration economy.Using a modified gravity model,taking the three major city groups in China,Yangtze River Delta,Pearl River Delta and Beijing-Tianjin-Hebei as its research objects,this paper analyzes the characteristics of the network connection and the inter-city hierarchical structure within each city group.The result shows that the intensity of the inter-city economic connections within each city group is traffic-time and distance dominated;significant differences exist among these city groups in terms of their inter-city network connection;there exists,to some extent,discontinuity in each City Group's inter-city hierarchical structure.