城市外向型功能对城市空间联系的影响——以长江经济带城市为例

Analysis of the Spatial Connection Based on the Outward Function of the City:Evidences from the Cities along the Yangtze River Economic Belt

长江经济带作为我国区域总体发展战略之一,在推动长江上中下游城市、促进东中西地区互动合作方面具有重要作用。该文以长江经济带"协调会"成员城市为研究对象,采用城市流强度模型、引力模型测算出"协调会"各城市的外向功能量。根据各产业的外向服务业功能量及城市总外向功能量的大小,选取上海、南京、武汉、宁波、重庆、合肥六个城市,利用最小二乘法分析了城市总外向功能量对城市空间联系的影响。研究结果表明,长江经济带各城市间的铁路客运次数与城市间的距离负相关,城市间的距离越远,铁路客运次数越少;具有较强外部功能量的城市对空间联系的影响显著;长江经济带各城市间人口规模与铁路客运次数呈正相关关系。根据研究结果,该文提出了长江经济带沿线城市应加快立体交通体系建设和促进城市产业专业化、特色化发展等建议。

Based on the data of the member cities of the Yangtze River economic belt＂coordination committee＂,the paper applies the model of gravity and the degree of urban flow to measure the outward function of the cities.Then,choosing the six cities of Shanghai,Nanjing,Wuhan,Ningbo,Chongqing and Hefei,the paper uses the OLS to analyze the influence of the urban outward function on their spatial connection.The results show that the linkages between the cities in Yangtze River Economic Belt decay with the increasing distance;the cities with strong outward function have significant effect;the scale of population has positive relation with the railway transportation.Therefore,the cities in Yangtze River Economic Belt are suggested to set up stereoscopic transport system and to improve the featured industrial development.