6Jiang S, Kececioglu D B. Maximum likelihood estimates, from censored data, for Mixed-Weibull Distributions[J].IEEE Trans On Reliability, 1995, 44(3): 477-488.
7Keeeeioglu D B, Wendai W. Parameter estimation for mixed-weibull distribution[A]. In IEEE Proeeedins Annual Reliability and Maintainability Symposium[C], 1998, 247-252.
8Dempster A P, Laird N, Rubin D B. Maximum likelihood from incomplete data via the EM algorithm(with discussion)[J]. J Royal Stat Soc B, 1977, 39: 1-18.
9Render R A, Walker H F. Mixture densities, maximum likelihood and the EM algorithm[J]. SIAM Review, 1984,26: 195-239.
10Mclaehan G L, Krishnan K. The EM Algorithm and Extensions[M]. John Wiley & Sons, INC , New York, USA,1996.