In this paper, we used the concepts of the maximum likehood estimate and the direction maximum likehood estimate to give two kinds of estimates for two-parameter exponential distribution.
利用极大似然估计以及方向极大似然估计的概念，分别得到了双参数指数分布的参数的估计量，并证明了双参数指数分布中的两个参数满足双曲线型关。
Two-parameter exponential distribution is an important distribution in reliability engineering. It is studied because it is useful in theory and in practice.
双参数指数分布是可靠性工程中重要的分布之一，对其研究有一定的理论意义和实用价值。
Two-parameter exponential distribution is an important distribution in reliability engineering. It is studied because it is useful in theory and in practice.
双参数指数分布是可靠性工程中重要的分布之一，对其研究有一定的理论意义和实用价值。
应用推荐