中文摘要在生态学中估计生物数量密度时，线上穿越抽样法是一种常用的方法。
In ecology, line transect survey is one of the most widely used method to assess the biomass density.
引入一种新的数学模型方法——熵值估计法，对地域中不同规模的城市数量结构进行分析。
A new mathematic model named entropy evaluation method is introduced to analyze the structure of city Numbers in different size in a given zone.
引入一种新的数学模型方法——熵值估计法，对地域中不同规模的城市数量结构进行分析。
A new mathematic model named entropy evaluation method is introduced to analyze the structure of city Numbers in different size in a given zone.
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