3LAM Y.A note on the optimal replacement problem[J].Advances in Appl.Probabil.,1988,20:479-482.
4LAM Y.Geometric processes and replacement problem[J].Acta Mathematicae Applicatae Sinica,1988,4:366-377.
5STADJE W,ZUCKERMAN D.Optimal strategies for some repair replacement models[J].Advances in Appl.Probabil.,1990,22:641-656.
6SUB H.On a two-dissimilar-unit system with three modes and random check[J].Microelectronics and Reliability,1997,37(8):1 233-1 238.
7CHELBI A,AIT-kADI D.An optimal inspection strategy for a randomly failing equipment[J].Reliability Engineering and System Safety,1999,63(2):127-131.
8ATANU B,JYOTIRMOY S,SAHADEB S.Availability of a periodically inspected system,maintained under an imperfectrepair policy[J].IEEE transaction reliability,2003,52(3):311-318.
9BARLOW R E,HUNTER L C.Optimum preventive maintenance policy[J].Operations Res.,1960,8:90-100.
