通过计算，冗余控制可使整个负压系统的平均无故障工作时间至少增加一倍。
Theoretic calculations show that with redundancy control the mean-time-between-failures (MTBF) of the vacuum system is doubled at least.
该文应用GO法分析YAG激光器系统的可靠性，得到系统平均无故障工作时间等重要可靠性指标。
GO reliability analysis of a YAG laser system was used to determine the mean time between failures and other important system reliability data.
利用在更换周期点上具有的马尔可夫性质，以系统首次故障前平均工作时间最大为目标建立了确定最佳更换周期的模型。
Using the property of Markov at the points of replacement period, a model of determining the optimal period is developed with objective of maximizing the mean time to first failure of system.
针对机械产品故障率随工作时间增加而增大的实际情况，提出了故障风险的概念。
The concept of failure risk was put forward in allusion to the fact that the failure rate of mechanical equipment increases with working hours.
针对机械产品故障率随工作时间增加而增大的实际情况，提出了故障风险的概念。
The concept of failure risk was put forward in allusion to the fact that the failure rate of mechanical equipment increases with working hours.
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