A closer look at de-aliasing effects using an efficient foldover technique

Foldover techniques are used to reduce the confounding when some important effects (usually lower order effects) cannot be estimated independently. This article develops an efficient foldover mechanism for symmetric or asymmetric designs, whether regular or nonregular. In this paper, we take the uniformity criteria (UC) as the optimality measures to construct the optimal combined designs (initial design plus its corresponding foldover design) which have better capability of estimating lower order effects. The relationship between any initial design and its combined design is studied. A comparison study between the combined designs via different UC is provided. Equivalence between any combined design and its complementary combined design is investigated, which is a very useful constraint that reduce the search space. Using our results as benchmarks, we can implement a powerful algorithm for constructing optimal combined designs. Our work covers as well as gives results better than recent works of about 20 articles in the last few years as special cases. So this article is a good reference for constructing effective designs.     

A stratified unrelated question randomized response model using Neyman allocation

This paper applies stratified random sampling using Neyman allocation to Mangat et al. (1992 Mangat, N.S., Singh, R., Singh, S. (1992). An improved unrelated question randomized response strategy. Cal. Stat. Assoc. Bull. 42:277–281.[Crossref] , [Google Scholar]) unrelated question randomized response (RR) strategy for both completely truthful reporting and less than completely truthful reporting. It is shown that, for the prior information given, our new model is more efficient in terms of variance (in the case of completely truthful reporting) and mean square error (in terms of less than completely truthful reporting) than Kim and Elam's (2007 Kim, J.M., Elam, M.E. (2007). A stratified unrelated question randomized response model. Stat. Papers 48:215–233.[Crossref], [Web of Science ®] , [Google Scholar]) model. Numerical illustrations and graphs are also given in support of the present study.     

An optional randomized response model for estimating a rare sensitive attribute using Poisson distribution

The crux of this article is to estimate the mean of the number of persons possessing a rare sensitive attribute based on the Mangat (1991 Mangat, N.S. (1991). An optional randomized response sampling technique using non–stigmatized attribute. Statistica. 51(4):595–602. [Google Scholar]) randomization device by utilizing the Poisson distribution in simple random sampling and stratified sampling. Properties of the proposed randomized response (RR) model have been studied along with recommendations. It is also shown that the proposed model is more efficient than that of Land et al. (2011 Land, M., Singh, S., Sedory, S.A. (2011). Estimation of a rare attribute using Poisson distribution. Statistics. 46(3):351–360.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) in simple random sampling and that of Lee et al. (2013 Lee, G.S., Uhm, D., Kim, J.M. (2013). Estimation of a rare sensitive attribute in stratified sampling using Poisson distribution. Statistics. 47(3):575–589.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]) in stratified random sampling when the proportion of persons possessing a rare unrelated attribute is known. Numerical illustrations are also given in support of the present study.     

论后现代技术的品性和实践

以信息、语言、记忆工业和时间物体为代表的后现代技术,批判现代技术的机械化、商品化、功利化、权力化人类中心主义以及物化和异化带来的各类难以预测的事故和灾难。主张在非祛魅性、多元性、生态性和非决定论的后现代科学基础上,根除"技术官僚主义",推动后现代技术往更加人道、民主、自由、智慧和艺术的方向发展,将技术进一步人性化和真善美一体化,使其真正为新人民和全人类的文明服务。     

基于网络多媒体环境的大学生英语自主学习能力研究

以计算机和网络为核心的现代信息技术正影响和改变着大学英语教学,将传统课堂教学与学习者的个性化自主学习有机地结合起来,将基于多媒体网络环境的＂自主学习＂教学模式应用于大学英语教学,以学生为中心,培养学生自主学习能力,才能使学生真正地提高英语应用能力,进而对提高我国大学英语教学质量,对我国今后的英语教学工作产生重要作用。     

中国省级政府的财政支出效率研究——基于DEA方法分析

利用数据包络分析方法实证研究了2001年和2006年中国30个省级政府的财政支出效率。结果表明,中国省级政府的财政支出效率总体上有进一步提升的空间;非参数检验方法证明了财政支出效率在东部、中部和西部地区之间存在显著差异性。各省级政府应该保持适当的财政支出规模,不断优化财政支出结构,提高财政资金的使用效率;中央政府的转移支付应适当向中西部不发达省份倾斜,推行区域均衡发展战略。     

简论教育技术在《模拟电子技术》课程中的运用

多媒体技术的应用为《模拟电子技术》课程教学手段的改革开拓了一个新的领域 ,科学有效地使用多媒体是教学手段改革的关键。     

充分运用现代教育技术 全面革新大学英语教学

本文探讨了如何使现代教育技术同传统的教学手段相结合,充分发挥其作用和潜力,全面革新大学英语教学,建立以多媒体网络技术为支撑的人机结合的现代化大学英语教学新模式,该模式体现了以学生为中心的个性化学习理念,易于操作,优化了教学资源,培养学生英语综合实用能力和运用现代化的信息传播手段获得英语知识能力的同时,注重培养学生的文化素养。新模式对于广大高校非常有实用价值。     

我国企业自主技术创新体系解析

技术创新是我国企业提高核心竞争优势的有效方式,而自主技术创新是技术创新的一种主要形式。我国企业的自主技术创新体系可分为四个要素:创新环境设计、自主研发创新、自主管理创新和自主市场创新。创新体系的设计可以为我国企业自主创新的实践提供有效的理论支持,而因子分析可以为创新体系提供现实性的检验:科学的创新环境设计可以有效促进其余三要素的发展和提高,而提高信息交流效率可以有效地提高自主管理创新的效率。     

多媒体技术在高校体育教学中的辅助作用

多媒体技术在体育教学中的运用使体育教学手段更加丰富多彩,与传统的体育教学方法相比,多媒体教学可以激发学生学习兴趣和积极性,提高学习效率.有利于解决教学中的重点和难点,有利于实施因材施教的个性化教学.并能够提高教师的素质和教学技巧,拓展体育教学的空间和范围.