A resampling approach to estimate variance components of multilevel models

In a multilevel model for complex survey data, the weight‐inflated estimators of variance components can be biased. We propose a resampling method to correct this bias. The performance of the bias corrected estimators is studied through simulations using populations generated from a simple random effects model. The simulations show that, without lowering the precision, the proposed procedure can reduce the bias of the estimators, especially for designs that are both informative and have small cluster sizes. Application of these resampling procedures to data from an artificial workplace survey provides further evidence for the empirical value of this method. The Canadian Journal of Statistics 40: 150–171; 2012 © 2012 Statistical Society of Canada     

基于WEB校友录的设计实现

本系统是采用Microsoft Visual Studio 2005作为前台开发工具,SQL Server2000作为后台数据库平台的管理系统。系统采用结构化生命周期法进行系统分析和设计,并采用原型法进行系统实施。这样能有效避免盲目开发问题,同时能充分的发挥原型法的优势,能顺利实现系统的实施。     

浅析ERP与ISO9000的联系及区别

本文从多个角度将ERP与ISO9000进行比较,尝试阐述二者之间的内在联系及区别。     

New York: The Animated City

Abstract

The urban landscape of New York City is one that is familiar to many, but, through the medium of animation, this familiarity has been consistently challenged. Often metamorphic, and always meticulously constructed, animated imagery encourages reflective thinking. Focusing on the themes of construction, destruction, and interactivity, this article seeks to cast critical light upon the animated double life that New York City has lived through the following moving image texts: Disney’s Fantasia 2000 (1999), Patrick Jean’s computer-generated short Pixels (2009), and Rockstar Games’ open-world blockbuster Grand Theft Auto IV (2008).     

软件开发质量管理体系实施阻力的根源与对策

对于某些复杂的事物,组成事物的各个部分之间的各种联系成为决定事物性质的关键因素.从这个基本点出发,对比一般工业品生产和软件产品生产的区别,分析了软件生产在构造流水线式生产的困难、开发过程中的信息传递不畅,以及信息结构日趋复杂等特点.结合我国软件业实际,总结出软件质量管理体系实施阻力的主要具体表现和根源,并提出了根据本企业特点强化质量体系、管理者推动、定期质量培训、做好思想动员等改善软件质量管理体系实施效果的相关措施.     

Confidence intervals for the mean of a population containing many zero values under unequal‐probability sampling

In many applications, a finite population contains a large proportion of zero values that make the population distribution severely skewed. An unequal‐probability sampling plan compounds the problem, and as a result the normal approximation to the distribution of various estimators has poor precision. The central‐limit‐theorem‐based confidence intervals for the population mean are hence unsatisfactory. Complex designs also make it hard to pin down useful likelihood functions, hence a direct likelihood approach is not an option. In this paper, we propose a pseudo‐likelihood approach. The proposed pseudo‐log‐likelihood function is an unbiased estimator of the log‐likelihood function when the entire population is sampled. Simulations have been carried out. When the inclusion probabilities are related to the unit values, the pseudo‐likelihood intervals are superior to existing methods in terms of the coverage probability, the balance of non‐coverage rates on the lower and upper sides, and the interval length. An application with a data set from the Canadian Labour Force Survey‐2000 also shows that the pseudo‐likelihood method performs more appropriately than other methods. The Canadian Journal of Statistics 38: 582–597; 2010 © 2010 Statistical Society of Canada     

高职院校引进ISO9000-2000质量认证体系初探

针对加入WTO后我国职业教育面临严峻挑战和高等教育大众化进程中高等职业教育迅速发展的实际 ,提出了应在高职院校引进ISO90 0 0 2 0 0 0质量认证体系的建议 ,并就这一问题 ,围绕着背景分析、意义阐述、实践组织和实施过程中需要注意的标准化和多样性、标准化和特色创新等进行了细致的探讨 ,旨在使我国的高职院校的质量管理真正纳入科学化、规范化的健康发展轨道。     

SHCS产品中硬件软件的可靠性相关性研究

研究了软硬件组合系统产品中，产品可靠性与硬件，软件可靠性的自相关性和互相关性。为满足GB／T1900－2000族标准所要求的产品质量特性之一（可靠性）提出了重要建议。     

粘滞阻尼器对高层框架剪力墙结构的减震作用分析

粘滞阻尼器可有效减少建筑结构在地震作用下的动力响应.高层框架剪力墙结构以其特有的使用空间灵活的优点被广泛采用.文章运用大型有限元分析软件SAP2000,通过动力时程分析方法,对比分析设有粘滞阻尼器和未设有粘滞阻尼器的两种高层框架剪力墙结构的减震控制结果,分别计算其层间位移角、速度、位移和顶层加速度.笔者认为,粘滞阻尼器的设置对高层建筑物可以起到耗能减震作用.     

ISO 9000与汽车维修服务业的现代质量管理

针对我国汽车维修服务业的现状,提出按ISO 9000国际标准建立现代质量管理模式以满足客户的要求,并提出了具体的实施程序与方法.