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。
In order to improve on the low evaluation precision of the grey relational analysis model, the entropy theory was integrated with the grey relational analysis method to establish a new model.
为了改进灰色关联分析模型评价精度低的缺点，将熵值理论与灰色关联分析方法相结合，建立起基于熵权的灰色关联分析模型。
Listed companies; performance evaluation; strategic; principal component analysis; entropy method.
上市公司；业绩评价；战略；主成分分析；熵值法。
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