中文摘要：

Corresponding author.Hongtao Lei was born in 1982. He is a Ph.D. candidate of National University of Defense Technology. He received his B.S. and M.S. degrees in management science and engineer- ing from National University of Defense Tech- nology. From 2009 to 2010, he was a visiting student of the University of Montreal. His re- search interests are combinatorial optimization,logistics networks and equipment support. E-mail： hongtaolei@ yahoo.cn Bo Guo was born in 1962. He is a professor of National University of Defense Technology. His research interests are reliability engineering, logistics networks, equipment support and infor- mation systems. E-mail： boguo @nudt.edu.cn Tao Zhang was born in 1976. He is an asso- ciate professor of National University of Defense Technology. His research interests are equip- ment support, reliability analysis and optimiza- tion and maintenance support systems. E-mail： zhangtao @nudt.edu.cn