A grey comprehensive assessment method is adopted for the location problem by analyzing the objectives, principles and factors of the location problems.
分析城市物流中心选址的目标、原则和影响因素，选择灰色综合评价法进行选址。
Matter element analysis has been used to create a Water Quality Comprehensive Assessment Model. The grey clustering method was used to calculate the weight of contamination.
运用物元分析方法建立水质综合评价模型，采用灰色聚类方法确定各污染参数的权系数。
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