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基于职能与区位二元视角,构建综合评价指标体系,对2014年中国地级以上城市的门户性、门户等级体系、门户群以及门户城市的空间结构与意象进行研究,结果表明:1中国城市门户性在地带性尺度上呈“东中西”三级递减空间格局,东部地区门户城市空间集群趋势明显,中部、西部地区缺乏明显的高值集群。2中国门户城市划分为4个等级,高等级门户沿海、沿江、沿边指向性明显,低等级门户广泛分布于中、西部内陆地区。3中国门户城市可划分为辽东半岛、京津秦唐、山东半岛、长江三角洲、海峡西岸和珠江三角洲六大门户群,六大门户群的腹地范围差异较大且区域分工明显。
Based on the dual perspective of function and location, this paper constructs a comprehensive evaluation index system and studies the spatial structure and image of the portals, portals and portals in China’s prefecture-level cities in 2014. The results show that: 1 China’s urban portals In the zonal scale, there is a three-level decreasing spatial pattern of “Eastern, Eastern and Western.” The trend of spatial clusters in the port city of the eastern region is obvious. There is no obvious high-value cluster in the central and western regions. 2 China’s gateway cities are divided into four levels. The high-level gateways are obvious along the coast, along the riverside and along the border. Low-level gateways are widely distributed in the inland areas in the west and in the west. 3 China’s gateway cities can be divided into six major portals in the Liaodong Peninsula, Beijing-Tianjin-Qinhuangdao, Shandong Peninsula, the Yangtze River Delta, the west bank of the Taiwan Strait and the Pearl River Delta. The hinterland ranges of the six major gateway groups are quite different and the division of labor is obvious.