Under many conditions, as verified from outcrop data, fracture length is theoretically expected to follow an exponential distribution.

根据许多条件，并验证了从野外露头资料，断裂长度理论的预想为后续指数分布。

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For a life data x, whether it comes from the censoring exponential distribution or the censoring normal distribution, it can use the likelihood ratio test to make a decision.

对给定的寿命试验数据x，利用似然比检验法可对该数据是来自截尾指数分布还是截尾正态分布进行判别，但却很难求出似然统计量的分布形式。

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Then the MRBF is calculated with the data offered by France which follow the exponential distribution.

并根据法国所提供的舰炮部件可靠性数据，按指数分布计算了系统的平均故障间隔发数。

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