The clustering analysis, as a kind of data analysis tool appeared in this case.
在这种情况下，聚类分析作为一种数据分析工具应运而生。
And the rough set is a new data analysis tool to deal with ambiguity and uncertainty of knowledge; it has been successfully applied to many areas of classification.
而粗糙集是一种新的处理模糊和不确定性知识的数据分析工具，已被成功地应用到许多有关分类的领域。
And the rough set is a new data analysis tool to deal with ambiguity and uncertainty of knowledge; it has been successfully applied to many areas of classification.
而粗糙集是一种新的处理模糊和不确定性知识的数据分析工具，已被成功地应用到许多有关分类的领域。
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