【摘要】 对评价指标特征值采用等区间的划分方法以确定危险等级，忽略了指标特征值在一定条件下作进一步改进时的难易程度，具有明显的不合理性·为解决这一问题，利用模糊数学方法给出了定量指标特征值及其无量纲特征值的非线性模糊处理模型·为了使定性指标无量纲特征值的确定具有非线性意义，在采用定量指标无量纲特征值的非线性模糊分级标准的基础上，探讨了定性指标无量纲特征值的确定方法·为了充分体现专家的经验和判断，专家在为某一指标赋值时可给出区间数，然后运用模糊数学的综合分析法，以获得该指标的无量纲特征值·实例表明，对危险评价指标特征值及无量纲特征值的非线性模糊处理优于线性处理，它使危险评价结果更为符合实际·更多还原

【Abstract】 For the characteristics value of assesement index,the equal region method for defining rish gradation ignores the difficult and easy extent of the improvement on the characteristics value under a centain condition. To solve this problem,index characteristics value and its fuzzy handling models of nonlinear dimensionless characteristics value were given by the method of fuzzy mathematics. To make the qualitative dimensonless index characteristics value being of nonlinear mearings,the method for determining the qualitative dimensionless index characteristics value were discussed by using nonlinear fuzzy classified standard of index characteristics value. To embody experts experience and judgement sufficiently,the experts can give region number on evaluating value for some index,and then obtain the nonlinear index characteristics value by using fuzzy mathematical method of synthesis analysis. Examples show that the nonlinear fuzzy handling method is better than the linear fuzzy handling method.更多还原