摘要
针对随机截尾寿命数据模型的参数估计,提出基于EM算法的通用算法,并以疲劳寿命计算中所常用的二参数威布尔分布模型为例,给出基于EM算法的寿命数据拟合通用方法。另外对于服从复杂分布模型的数据,则采用与蒙特卡洛法相结合的EM算法。最后通过计算模拟的不完全疲劳寿命数据,验证了EM算法对于随机截尾寿命数据模型参数估计的有效性。
A general method based on an expectation maximization（EM） algorithm is proposed to deal with the random censoring model with various distributions.A parameter estimation method for the two-parameter Weibull distribution is developed,while an improved EM algorithm is combined with the Monte Carlo algorithm to address the complicated distribution models.Finally,the mimic random censoring data simulated by the Monte Carlo algorithm is utilized to assess the performance of the methods proposed in the paper.
出处
《北京化工大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第3期104-107,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
