[1] Wu S M. Reliability engineering [M]. London: Springer, 2011: 129-140.
[2] Nicolai R P, Dekker R. Optimal maintenance of multi-component systems: a review [R]. Rotterdam, Netherlands:Econometric Institute of Erasmus University Rotterdam, 2006.
[3] Zhang Y L, Wang G J. A geometric process repair model for a repairable cold standby system with priority in use and repair [J]. Reliability Engineering and System Safety, 2009, 94: 1782-1787.
[4] Hanagal D D, Kanade R A. Optimal replacement policies based on number of down times for cold standby system when the lifetime and the repair time are dependent [J]. Journal of Reliability and Statistical Studies, 2011, 4(1): 41-52.
[5] Castaniera B, Grallb A, Bérenguerb C. A condition-based maintenance policy with non-periodic inspections for a two-unit series system [J]. Reliability Engineering and System Safety, 2005, 87(1): 109-120.
[6] Nicolai R P, Dekker R. Complex system maintenance handbook [M]. London: Springer, 2008: 263-286.
[7] Gao W K, Zhang Z S, Zhou Y F, et al. Optimal combinatorial replacement policy under a given maintenance interval for the combined governor in diesel locomotives [J]. Eksploatacja i Niezawodnosc-Maintenance and Reliability, 2013, 15(2): 89-98.
[8] Kodo I, Toshio N. Optimal operation censoring policy of aircraft [C]//2012 Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling. Nanjing, China, 2012: 184-191.
[9] Sheu S H, Kuo C M, Nagagawa T. Extended optimal age replacement policy with minimal repair [J]. RAIRO: Recherche Operationnelle, 1993, 27(3): 337-351.
[10] Castro I T, Sanjuan E L. An optimal maintenance policy for repairable systems with delayed repairs [J]. Operations Research Letters, 2008, 36(5): 561-564.
[11] Chen M. Optimal random replacement models with continuously processing jobs [J]. Applied Stochastic Models in Business and Industry, 2012, 29(2): 389-398.
[12] Gao W K, Zhang Z S, Zhou Y F, et al. Maintenance optimization for a system with an implemented range of replacement activities [C]//2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering. Chengdu, China, 2013: 394-398.
[13] Tsai Y T, Wang K S, Tsai L C. A study of availability-centered preventive maintenance for multi-component systems [J]. Reliability Engineering and System Safety, 2004, 84(3): 261-270.
[14] Lewis R M, Torczon V, Trosset M W. Direct search methods: then and now [J]. Journal of Computational and Applied Mathematics, 2000, 124(12): 191-207.