Previous research on the redundancy allocation problem for series-parallel systems has focused on where component reliability is assumed to be an exact value.

以前在串-并联冗余系统可靠性的最优分配问题上，总是把部件的可靠度看成是一个确定的值，此方法有其局限性。

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Previous research on the redundancy allocation problem for series parallel systems has focused on where component reliability is assumed to be an exact value.

以前在串—并联冗余系统可靠性的最优分配问题上，总是把部件的可靠度看成是一个确定的值。

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The general expressions of reliability of series and parallel systems are deduced and the extent of effect of failure -dependence on the reliability is analysed.

文中建立了串联和并联失效相关系统可靠度的一般公式，并分析了失效相关的影响幅度。

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