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.     

装备工业的快速发展与产业结构的优化升级

落后的技术装备水平是导致我国工业粗放型增长并进而导致结构性矛盾的重要原因。在新的发展阶段 ,优化产业结构 ,淘汰落后技术 ,全面更新技术手段和生产设备 ,加快装备工业发展 ,推进关键设备国产化 ,成为提高国民经济运行质量和效益的战略性环节     

关于新时期高校中层干部素质要求的思考

高等教育事业的快速发展,对高校中层干部提出了较高的素质要求。按照“三个代表” 的要求,以德为本,理念先行,协调为上,守土有责,应当是新时期高校中层干部的基本素质要求。     

试析抗战时期国民政府对基层民意机关的理论设计

本文从总原则与具体细节两个方面论述了抗战时期国民政府对基层民意机关的理论设计，并且指出这种设计具有两个显著特点：１．阶级性，２．欺骗性。     

构建电子政务系统的研究

文章介绍了电子政务的内涵及其基本内容 ,分析了实施电子政务的意义 ,指出了实施电子政务的基本原则 ,提出了构建电子政务系统的网络模型和层次模型。     

弯曲液面的附加压强

本文主要从球形液面内、外的压强差和任意弯曲液面内、外的压强差两个方面推导 了弯曲液面的附加压强公式。     

英语引申意境的探析

英语中的引申是一种普遍现象。英译汉时不仅有时词义要引申。词组、分句或句子的含义有时也要引申,英语引申的意境,可以从褒与贬、抽象与具体、词义搭配、概念大小、逻辑修辞、引申层次和引申范围七个不同方面来探析。     

从《醒世姻缘传》看汉语句式结构的层面渗透

汉语句式结构框架在其产生之后并非静止不动，除其自身的丰富发展之外，它还向不同的语法结构层面渗透，汉语词、词组、句子在结构关系上所具有的一致性由此产生。明末清初白话小说《醒世姻缘传》中的比拟句、“把”字句等就充分显示了汉语句式结构的这种中间过渡状态。     

Two-stage Huber estimation

In this paper we propose a new robust estimator in the context of two-stage estimation methods directed towards the correction of endogeneity problems in linear models. Our estimator is a combination of Huber estimators for each of the two stages, with scale corrections implemented using preliminary median absolute deviation estimators. In this way we obtain a two-stage estimation procedure that is an interesting compromise between concerns of simplicity of calculation, robustness and efficiency. This method compares well with other possible estimators such as two-stage least-squares (2SLS) and two-stage least-absolute-deviations (2SLAD), asymptotically and in finite samples. It is notably interesting to deal with contamination affecting more heavily the distribution tails than a few outliers and not losing as much efficiency as other popular estimators in that case, e.g. under normality. An additional originality resides in the fact that we deal with random regressors and asymmetric errors, which is not often the case in the literature on robust estimators.     

用干簧管进行液位测量的方法探讨

本文介绍了液位测量中开发应用干簧管作浮子式液位计传感器件的工作原理和几个关键技术问题的处理方法。对于物位测量和其它领域也有参考意义和学术价值。