一般虚拟系统法

GENERALIZED VIRTUAL SYSTEM METHOD

对于估计系统可靠性的置信下限，虚拟系统法在水平相合性及渐近有效性等方面较大地改进了Ｌ－Ｍ方法．一般虚拟系统法用基于系统的有关数据估计任何子系统参数，得到的估计量是渐近有效的，而且构造的参数置信下限既是渐近有效的，也是水平相合的．

For estimating the lower confidence limit of system reliability, Viltual System Method greatly improves the Lindstrom and Maddens method with such advantages as level consistency and asymptotic ef- ficiency. In this paper, the generalized Virtual System Method is employed to estimate the parameter of any subsystem based on the data collected from the system. It is shown that the proposed estimator is asymtotically efficient and the constructed estimate for the lower confidence limit of the parameter is not only asymptotically efficient but also level consistent.