Monte Carlo method is used to simulate the failure rate curve of repairable system, the sample method of the component is discussed.

采用蒙特卡洛方法对可维修系统的故障率进行模拟，讨论了元件的抽样方法。

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When strength degenerates, reliability decreases with time more obviously, and the failure rate has the feature of a bathtub curve.

强度退化时，可靠度随时间降低较为明显，失效率具有“浴盆”曲线的特征。

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