Gray system classification analysis and lake eutrophication assessment 灰色系统聚类分析与湖泊富营养程度评价
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Using entropy theory to study on environment - economy systems classification and coordinative development 环境经济系统分类及协调发展的熵研究
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The analysis methods of fuzzy classification and gray system classification are taken advantage of calssification of deformation behavior of the dams . and fuzzy comprehensive appraisal on dams " deformation behavior is performed 应用模糊聚类分析和灰色聚类分析对大坝的变形性态进行分类,对大坝变形性态进行模糊综合评判。