基于工程实践中关于可靠性的验前信息或失效率的验前信息，给出了可靠性参数，如可靠性、可靠寿命等的验后分布。

Based on a prior information on the reliability or on the hazard rate, the posterior distributions of reliability parameters, such as reliability, reliable life, are derived.

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当产品的寿命分布为指数分布时，其密度函数为，(2)其中为指数分布的失效率。

Exponential distribution: the density function is as follows, (2) in which is the failure -rate of the.

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通过拟合优度和累积失效率曲线形态的对比，说明了威布尔分布用于曲轴失效数据分析的优越性。

By comparing their fitting compatibility and the cumulative failure probability curve, the advantage of the Weibull-distribution based regression is concluded.

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