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。
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.
最后，使用灰色系统模型对彩票业与宏观经济的关系作了关联分析。
At last, a grey system model is used to show the relevancy between lottery industry and macro-economy.
给出了灰色关联分析及BP神经网络进行判别分析的数学原理和模型。
The mathematical principles and models of gray relational analysis and BP neural network used to determine the source of water were introduced.
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