京津冀与长三角城市群经济联系动态变化对比--基于城市流强度的视角

摘要

Urban flow intensity model reflects the city's close relationship of other regions, is the quantitative measure of for-eign service function.Based on the analysis of the urban flow intensity method, analysis economic ties between the beijing-Tianjin-Hebei urban agglomeration and Yangtze river delta urban agglomeration in 2004- 2013 dynamic contrast. Results show that from the location entropy export-oriented department, two big urban extroverted overall level is higher, but the Yangtze river delta urban agglomeration location entropy average slightly higher than Beijing-Tianjin-Hebei urban agglomeration; From the total amount of outgoing function dynamic change, two total amount of outgoing function in increasing trend, but the sec-ondary regional centers of Beijing-Tianjin-Hebei urban agglomeration performance is not outstanding, structure on the fault phenomenon; From the point of the intensity of urban flow dynamic spatial variation, "twin-engine" structure of Beijing-Tian-jin-Hebei urban agglomeration, Tianjin urban agglomeration strength increases rapidly, Yangtze river delta urban agglomeration present phase to the periphery; In terms of the structure of urban flow intensity, urban agglomeration core cities in the form of economic strength is stronger than outgoing service function, the urban flow inclination degree with the level of GDP.%城市流强度模型反映城市间对外联系的密切程度，是对外服务功能的量化衡量。基于城市流强度的分析方法，对京津冀城市群和长三角城市群2004—2013年经济联系进行动态变化对比分析。结果表明：从外向型部门区位熵来看，两大城市群外向型水平总体较高，但长三角城市群区位熵平均水平略高于京津冀城市群；从总外向功能量动态变化来看，两大城市群总外向功能量处于不断增加的趋势，但京津冀城市群的次级区域中心表现不突出，结构上看存在：断层现象；从城市流强度动态空间变化图来看，京津冀城市群的“双引擎”结构明显，天津市城市群强度增加较快，长三角城市群呈现梯次向外围扩散；从城市流强度结构来看，城市群中核心城市均表现为经济实力强于外向服务功能，其城市流倾向度与GDP水平不协调。