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交通流是人流、物流等要素流动的主要载体和表现形式,对于认识城市间相互作用等具有重要意义。基于城市间公路、铁路和航空客流数据,对中国城市网络空间关联进行特征提取和规律挖掘。研究表明:1公路流表现出强烈的空间依赖性和对城市群发育程度的良好识别作用;2铁路流呈现出“两横三纵”带状分布格局;3航空流视角则基本形成了以“菱形结构”为核心的城市网络框架。不同类型交通流刻画出不同层面的城市间关联格局,但却有着其内在联系。航空流是城市关联格局骨架构筑的主要形式,铁路流则为核心骨架的连通提供支撑轴带,而公路流是对整体骨架和支撑轴带的有效填充,从而形成区域间相互依赖、不可或缺的要素关联和空间关系。
Traffic flow is the main carrier and manifestation of the flow of people, logistics and other factors, and is of great significance for understanding the inter-city interaction. Based on the data of inter-city road, rail and air passenger flow, feature extraction and regular mining of urban network spatial relations in China are carried out. The results show that: (1) the expressway shows a strong spatial dependence and a good recognition of the development degree of the urban agglomeration; (2) the railway flow shows a strip pattern of “two horizontal and three vertical”; (3) Urban network framework with “diamond structure ” as the core. Different types of traffic flow depict different levels of inter-city patterns, but have their own internal relations. Aviation flow is the main form of framework for city associated pattern, and railway flow provides support shaft for the connection of the core skeleton, and the highway flow is an effective filling of the whole skeleton and the support shaft to form an interdependent and indispensable region The elemental relationship and spatial relationship.