Combined with Feature Value of Grades for results quantification, applying Variable Fuzzy Set model on assessment could overcome the unfitness of the maximum membership principle.

采用可变模糊集模型进行评价，以级别特征值方法量化评价结果，可有效解决最大隶属原则的不适应性。

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By using fuzzy random variable theory and fuzzy set theory, the concept and its calculation method of fuzzy random characteristic quantity of safety grade are put forward.

分别运用模糊随机变量理论和模糊集理论而提出了安全等级模糊随机特征量和安全等级模糊特征量的概念及其计算方法。

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Based on the conception of opposed fuzzy set, the variable fuzzy decision-making model and corresponding method are proposed.

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。

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