把模糊数学的知识应用到决策分析中，使模糊集参与决策，可以提高决策结果的准确性和可信度。
It can be explained, that if fuzzy math is applied into decision analysis by making fuzzy sets to participate in decision making, it can raise accuracy and reliability of the decision result.
首先建立可变模糊决策(优选)理论，提出以对立模糊集概念为基础的可变模糊决策模型与方法。
Based on the conception of opposed fuzzy set, the variable fuzzy decision-making model and corresponding method are proposed.
在粗糙集理论及粗糙模糊集理论中，上下近似及边界的求解与决策表属性约简是它们的核心内容。
In the rough set theory and rough-fuzzy set theory, computation of approximations and edge and attributes reduction of decision table is import part of them.
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