安全等级特征量及其计算方法—工矿企业.doc

安全等级特征量及其计算方法 — 工矿企业 【摘 要】 指出了目前用模糊评价法确定系统的安全等级所存在的问题和不足之处。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。安全等级特征量及安全等级变量，均为安全等级取值论域上的模糊子集，而并非是一个确定的点。还给出了安全等级的绝对可能性和相对可能性的计算方法。实例表明，笔者所提出的安全等级特征量及可能性的计算方法是科学的、合理的。 【关键词】 安全等级 评价 模糊随机特征量 模糊特征量 可能性 Characteristic Quantity of Safety Grade and Its Calculation Method Xu Kaili Chen Baozhi （ School of Resource and Civil Engineering, Northeast University) Chen Quan (Center for Accident Investigation and Analysis, State Economic and Trade Commission) Abstract Using the method of fuzzy evaluation, existing problems and shortcomings are pointed out as the time of system safety grade being defined. 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. Both characteristic quantity of safety grade and its variable are the value obtained from the fuzzy sub-set of safety grade on domain, and are not a definite point. Calculation me