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系统可靠性的回路分析法、状态分析法和模拟法,可以对一些具有串并联结构或某种不确定性(随机性)的系统,进行可靠性分析和计算。但在实际应用中,有时也会遇到一些更复杂的情形,给这些方法的使用带来困难。例如: (1)系统的各个分系统或某些环节之间,看不出明确的直接的联系,或者它们之间的联系提不出明确的数值关系。
System reliability loop analysis, state analysis and simulation can be carried out on some systems with series-parallel structure or some kind of uncertainty (randomness) for reliability analysis and calculation. However, in practical applications, sometimes more complicated situations are encountered, which brings difficulties to the use of these methods. For example: (1) There is no definite direct relationship between the various subsystems of the system or some links, or the relationship between them can not provide a definite numerical relationship.