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arXiv 1504.04229physics.soc-phnlin.AO
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城市发展的齐普夫定律的演变

The evolution of Zipf's law indicative of city development

Yanguang Chen

摘要:

齐普夫城市规模分布规律可以用三种数学模型表示:单参数形式、双参数形式和三参数形式。单参数模型和双参数模型之一是城市科学家所熟悉的。然而,三参数模型和另一类双参数模型尚未引起人们的重视。本文探讨了Zipf模型的适用条件和适用范围。通过数学推理和实证分析,有如下新发现。首先,如果一个地理区域中的城市规模分布不能用单参数或双参数模型来描述,那么也许可以用具有尺度因子和尺度平移因子的三参数模型来表征。第二,所有这些Zipf模型可以统一基于级联结构的分级标度律。第三,城市规模的分布模式似乎从三参数模式演变到双参数模式,然后再演变到单参数模式。利用中国城市四年人口普查数据,验证了三参数齐普夫定律和相应的等级规模分布的层次结构。这一研究对于人们认识社会系统的科学规律和城市发展的特性具有启示意义。

英文摘要:

Zipf's law of city-size distributions can be expressed by three types of mathematical models: one-parameter form, two-parameter form, and three-parameter form. The one-parameter and one of the two-parameter models are familiar to urban scientists. However, the three-parameter model and another type of two-parameter model have not attracted attention. This paper is devoted to exploring the conditions and scopes of application of this Zipf models. By mathematical reasoning and empirical analysis, new discoveries are made as follows. First, if the size distribution of cities in a geographical region cannot be described with the one- or two-parameter model, maybe it can be characterized by the three-parameter model with a scaling factor and a scale-translational factor. Second, all these Zipf models can be unified by hierarchical scaling laws based on cascade structure. Third, the patterns of city-size distributions seems to evolve from three-parameter mode to two-parameter mode, and then to one-parameter mode. Four-year census data of China's cities are employed to verify the three-parameter Zipf's law and the corresponding hierarchical structure of rank-size distributions. This study is revealing for people to understand the scientific laws of social systems and the property of urban development.

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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