求翻译：阐述了可靠性工程的基本概念。根据可靠性框图和马尔柯夫链法分别对可修复系统和不可修复系统的几种典型系统可靠性进行建模，并对系统的可靠度进行了计算，对可靠性分配和预计方法做了简要分析。最后简要分析了当前的维修方法和维修最优化方法。是什么意思？

Describes the basic concepts of reliability engineering. According to the reliability block diagram and Markov chain method, respectively and non-repairable system repair system of several typical system reliability modeling, and system reliability were calculated for reliability allocation and pred

The basic concept expounded the reliability engineering. In accordance with reliability diagram and Omar Sharif coca leaf chain Law respectively to repair the system and not fix the system may be a few typical system reliability, and the modeling of the system reliability Calculations were made, and

Elaborated the reliability project basic concept.The chain law to may repair the system separately according to the reliable diagram and Mar Kefu and cannot repair the system several kind of canonical system reliability to carry on the modelling, and has carried on the computation to the system marg

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Have explained the basic conception of the dependability project. According to dependability block diagram and Ma chain law respectively to can repair system and can't repair several model systematic dependability of system carry on the modeling, of Erke, and calculated to the reliability of the sys