项目名称: 异质总体中的随机比较和剩余寿命研究
项目编号: No.11426084
项目类型: 专项基金项目
立项/批准年度: 2015
项目学科: 数理科学和化学
项目作者: 凌晓亮
作者单位: 河北科技大学
项目金额: 3万元
中文摘要: 在现实生活中,由于生产过程的不稳定性、环境等其他随机因素的影响,制造出的产品所构成的总体中,大多数总体都是异质的。混合模型为异质总体的随机描述提供了一个有效的数学工具。本项目基于几种混合模型研究异质总体中的随机比较和剩余寿命。在随机比较方面,我们利用随机序研究混合变量分布的变化对异质总体变量分布的影响;在剩余寿命方面,当子总体具有递减剩余寿命函数时,我们分析异质总体平均剩余寿命函数的形状。本项目通过混合模型研究异质总体的随机性质,这些研究为混合模型在可靠性以及生存分析中的应用提供一定的理论依据。
中文关键词: 混合模型;相依性质;故障率;随机序;寿命分布类
英文摘要: Due to instability of production processes, environmental and other random factors, most populations of manufactured items in real life are heterogeneous. Mixtures model present an effective mathematical tool for stochastic description of heterogeneous populations. This research subject studies stochastic comparison and the residual life of heterogeneous populations based upon several mixture models. With respect to stochastic comparison, we use stochastic orders to study how the variation of the distribution of mixing variable influences that of heterogeneous populations variable. With respect to residual life, we analyze the shape of mean residual life function in the heterogeneous populations when all subpopulations have decreasing mean residual life functions. This research subject study the stochastic property of heterogeneous populations through mixture model, these results can provide some theory basis for application of mixture model in reliability theory and survival analysis.
英文关键词: Mixture model;Dependence properties;Hazard rate;Stochastic order;Classes of life distribution