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国军标GJB74.7-85中,对可靠性检验所用到的几个参数如MTBF,MTTR,θ_1,θ_0等都有明确的定义,但对这些参数的值如何选取却没有明确的说明。在不同的有关可靠性论述的著作中对MTBF,θ_1,θ_0值的选取以及它们之间的关系有不同的看法,更有许多争论。本文根据作者对军标GJB74.7-85的研究,对θ_1,θ_0的选取以它们同MTBF的关系提出了自己的看法。
National military standard GJB74.7-85, the reliability of the test used by several parameters such as MTBF, MTTR, θ_1, θ_0 and so have a clear definition, but how to choose the value of these parameters is not clearly described. There are many controversies over the selection of MTBF, θ_1, θ_0 values and the relationship between them in different works on reliability discussion. According to the author’s research on military standard GJB74.7-85, this paper puts forward his own opinion on the selection of θ_1 and θ_0 in terms of their relationship with MTBF.