Abstract
一个有效重要性采样算法被介绍在基本变量和失败模式与多重失败模式和模糊随机的不确定性分析复杂结构的系统的可靠性。以便改进采样效率，模仿的退火的算法被采用为每个失败模式，和结果优化重要性采样的密度中心点做越多重要贡献到模糊失败概率，越点被取样的 higher 出现可能性。为有多重模糊失败模式的系统，一个加权、混合的重要性采样函数被构造。到系统失败概率的每个模糊失败模式的 Thecontribution 被适当因素代表，并且采样的效率而且被改进。变化和变化的系数为失败概率评价被导出。二个例子被介绍说明现在的方法的合理性。与 directMonte-Carlo 方法，改进效率和方法的精确作比较被例子验证。
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