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arXiv 2211.04841physics.soc-ph
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基于人口分布与相互作用的多层次城市群构建

Constructing multi-level urban clusters based on population distributions and interactions

Wenpu Cao, Lei Dong, Ying Cheng, Lun Wu, Qinghua Guo, Yu Liu

摘要:

城市(或城市群)不是一个孤立的空间单位,而是社会经济活动密切相关的地区的组合。然而,到目前为止,我们缺乏一个一致的和定量的方法来定义多层次的城市群,通过这些社会经济联系。在这里,使用来自中国的颗粒人口分布和流量数据,我们提出了一个自下而上的聚合方法来量化城市群在多个空间尺度。我们揭示了六个“阶段”(即,水平)的人口密度流图,每一个对应的空间配置的城市群从大到小。此外,我们的研究结果表明,齐普夫定律只出现在第五个层次,证实了城市法律的空间依赖性。我们的方法不需要预先界定的行政边界,可以在全球范围内有效应用。

英文摘要:

A city (or an urban cluster) is not an isolated spatial unit, but a combination of areas with closely linked socio-economic activities. However, so far, we lack a consistent and quantitative approach to define multi-level urban clusters through these socio-economic connections. Here, using granular population distribution and flow data from China, we propose a bottom-up aggregation approach to quantify urban clusters at multiple spatial scales. We reveal six 'phases' (i.e., levels) in the population density-flow diagram, each of which corresponds to a spatial configuration of urban clusters from large to small. Besides, our results show that Zipf's law appears only after the fifth level, confirming the spatially dependent nature of urban laws. Our approach does not need pre-defined administrative boundaries and can be applied effectively on a global scale.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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