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安全等级特征量及其计算方法 | |||||
收集整理:佚名 来源:本站整理 时间:2009-01-10 12:08:47 点击数:[] ![]() |
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【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 AbstractUsing 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 method of absolute and relative possibility is also given. System safety in future can be evaluated and forecasted in a definite condition by the calculation method of fuzzy random characteristic quantity of safety grade. Examples demonstrate that calculation method of characteristic quantity of safety grade and the possibility pointed out in this paper are scientific and rational. Key words:Safety gradeEvaluationFuzzy random characteristic quantity 1系统安全等级的模糊性 2安全等级特征量 2.1安全等级模糊随机特征量与安全等级模糊特征量
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