Inference and optimal design of multiple constant-stress testing for generalized half-normal distribution under type-II progressive censoring

The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion.     

基于遗传算法的装备采购决策优化研究

在装备采购中，由于需求单位地域分布和担负的任务各不相同，对装备的品种、数量、时限要求也就不一样，如何使装备采购科学化、合理化，是一个涉及多变量、多目标的复杂系统问题。在综合考虑装备采购各项因素的基础上，构建多约束条件下的多目标模糊指派模型，提出了基于遗传算法的解决方案，最后通过案例进行仿真实验，验证该算法的可行性和有效性，解决了采用传统优化方法难以解决的装备采购优化决策问题。     

Conditional time-dependent nonparametric estimators with an application to healthcare production function

ABSTRACT

By using the probabilistic framework of production efficiency, the paper develops time-dependent conditional efficiency estimators performing a non-parametric frontier analysis. Specifically, by applying both full and quantile (robust) time-dependent conditional estimators, it models the dynamic effect of health expenditure on countries’ technological change and technological catch-up levels. The results from the application reveal that the effect of per capita health expenditure on countries’ technological change and technological catch-up is nonlinear and is subject to countries’ specific income levels.     

A NOTE ON EVANESCENT PROCESSES

This note examines the connection between μ-invariant measures for the transition function of a continuous-time Markov chain and those of its q-matrix, Q. The major result establishes a necessary and aufficient condition for a convergent μ-invariant measure for Q to be μ-inhant for the minimal transition function, P, under the assumption that P is honest. This corrects Theorem 6 of Vere-Jones (1969) and the first part of Corollary 1 of Pollett (1986), both of which assert that the above conclusion holds in the absence of this condition. The error was pointed out by E.A. van Doom (1991) and the counterexample which be presented provides the basis for the present arguments. In determining where the error occurred in the original proof, we are able to identify a simple sufficient condition for μ-invariance.     

中外合作办学的现状及问题分析

文章就中外合作办学的质量、合作者的水平和资质、合作办学的监管等问题进行了分析,并提出了相应的几点对策建议。     

与时俱进 应势而变——浅议入世后我国高等职业教育发展的趋势

入世以后,必将对我国高等职业教育提出新的要求。高等职业教育必须顺应时代发展的趋势,与时俱进、应势而变,才能与时代同步。本文遵循以下思路展开:入世以后,对我国高等职业教育的发展趋势作一些前瞻性的探讨,在此基础上提出应对的措施。有利于我国高等职业教育主动地适应新形势发展的要求。     

实施网络外语教学应注重的问题

实施网络外语教学应注重的几个问题 ,一是要认真考虑使用网络的教学目的 ,二是网络交流应该结合课程目的而展开 ,三是不能低估网络使用中存在的困难 ,四是在进行网络外语教学时教师必须提供必要的帮助 ,五是要让学生参与确定网络课堂教学的计划和内容     

交流电路参数的实用测量法研究

探讨了二端交流电路的R,L,C元件参数的测定,并研究了工频电路的等效电阻、等效电抗的测量方法。     

论重庆弱势群体的救助方略

在今天社会大变革、政府大转型之时,对弱势群体给予特殊的就业援助,对稳定社会具有重要的现实意义。为此,详实地分析了重庆市弱势群体的类型,以及市政府采取的及时有效的救援措施,并提出了一些相应对策。     

江苏省苏北新农村建设着力点探讨

江苏省苏北的新农村建设是一个惠及1 730多万农民的系统工程。建设苏北新农村关键是要把握六个着力点：促进农民增收,不断提高农民的生活水平;加大对苏北的扶贫开发力度,改善基本生产生活条件;加快农村经济结构调整,抓产业化发展,大力发展现代农业;加快苏北农村的基础设施建设;深入实施农村千万劳动力培训工程,用先进文化塑造新型农民,提高农民在新农村建设中的主体性和积极性;重视苏北农村的和谐社会建设。只有这样,才能真正推动苏北新农村建设的步伐,切实把握住确保江苏“两个率先目标”顺利实现的问题关键。