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monotone coherent system
释义
monotone coherent system
Encyclopedia
理学
可靠性理论
释
monotone coherent system
单调关联系统
在系统可靠性分析中,一般把研究对象分为部件和系统,部件是构成系统的基本单元,不可再分割。在不同时刻,部件和系统会呈现出不同状态,如正常状态或故障状态,可记为状态1或状态0。而在下一时刻,部件和系统会状态保持(状态1到状态1,或状态0到状态0)或状态变化(状态1到状态0,或状态0到状态1)。所谓单调关联系统,是指任一部件的状态变化必然导致系统的状态变化,且部件状态变化方向与系统状态变化方向始终保持一致(单调增或单调减)的系统。这里,当部件或系统状态由1变化为0时,称部件或系统状态变化方向为减,反之称状态变化方向为增。当某部件状态变化后,系统状态不变化时,称该部件为非关联部件。当存在某部件状态变化方向与系统状态变化方向不一致时,即该部件状态变化方向为增而系统状态变化方向为减,或该部件状态变化方向为减而系统状态变化方向为增时,称系统为非单调关联系统。
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