浅析放松能力对短距离跑的作用

通过从生理、技术角度分析肌肉放松对短距离跑的作用以及影响短距离跑中放松能力的主要因素,得出加强放松能力的训练对提高短跑运动员的成绩有显著性作用,并提出了一系列与短跑相结合的提高放松能力的训练方法及心理训练方法。     

复自适应均衡器的研究及实现

通过对HFC广播有线电视信道中的16QAM信号的研究，分析了噪声及信道特性对QAM信号的影响，提出了用自适应均衡器来提高QAM信号的传输质量，并用复杂可编程逻辑器件(CPLD)实现该均衡器。采用CPLD技术可大大增加均衡器的可靠性、灵活性，同时也缩短了设计周期。该均衡器可运用于实际的有线通信系统，从而为复信号的均衡提供了一个技术方案。     

Development of measures to assess dimensions of IS operation transactions

Information Systems (IS) researchers often rely on Organization Economics models to describe and explain various IS management issues. While those models are found to be useful, measures are yet to be proposed to assess the dimensions of IS transactions. In this paper we present the results of a study that was a first effort toward this end. The focus of the study was on one type of transaction, IS operations, in a particular management context, that of outsourcing. Measures were developed for four critical dimensions of IS operation transactions: asset specificity, measurement problem, origin of the most important investment, and governance mechanism. Data from 250 large Canadian firms were used to assess the measures, using the partial least squares technique.     

积分中值定理“中间点”收敛速度的一个估计

利用函数连续模分别给出了第一积分中值定理和第二积分中值定理的“中间点”收敛速度的一个估计。     

Ordering Properties of Convolutions of Exponential Random Variables

Convolutions of independent random variables are usually compared. In this paper, after a synthetic comparison with respect to hazard rate ordering between sums of independent exponential random variables, we focus on the special case where one sum is identically distributed. So, for a given sum of n independent exponential random variables, we deduce the "best" Erlang-n bounds, with respect to each of the usual orderings: mean ordering, stochastic ordering, hazard rate ordering and likelihood ratio ordering.     

敞开的痴迷与纠缠--博尔赫斯小说结构在格非短篇创作中的延伸

博尔赫斯小说结构在格非短篇创作中有3个方面的延伸一是时间,小说所呈现的"循环型(圆型)结构"把我们带入了对于时间与幻象的痴迷;二是镜子与迷宫,它们生成了无限繁殖与无限增生的文学意象,虚构了想象世界与现实利益之间的模糊,由此也成为结构小说的内在核心,并为文本的多重意蕴提供了潜在的无限阐释的多重可能;三是空间距离,对原先文本或知识的改写,成为这种距离叙述的主要表现方式,它在一定程度上又拉近了与读者期待视野之间的距离,形成所谓"文本的文本"、"叙述的叙述"式的"幻想小说"叙述结构.     

远程开放教育管理类课程教学模式改革与实践

探讨了"以学生为主体、以教师为主导、以学生自主探究为主线"的网络环境下的远程开放教育管理类课程"双主体--探究式"教学模式,就是将现代信息技术与课程加以整合,培养学习者的创新意识、创新精神、创新能力和解决实际问题的能力。     

Structural changes during a century of the world’s most popular sport

The analysis in this paper employs a methodology for dating structural breaks in tests with non-standard asymptotic distributions. The application examines whether changes in the rules of a game and major social and political events during the past century had significant effects upon various outcomes of this game. The statistical methodology first applied here proves successful as most breaks can be traced to specific events and rule changes. Dating these breaks allows us to obtain useful insights into production and competition processes in this industry. As such, using empirical tests we illustrate the utility of a valuable statistical technique not applied previously.Ignacio Palacios-Huerta: I am grateful to Gary S. Becker, Tony Lancaster, Robin Lumsdaine, Kevin M. Murphy, Gabriel Perez-Quiros, Ana I. Saracho, Amy Serrano, an associate editor and a referee for useful suggestions. I am also indebted to Barry Blake, Vicki Bogan, Salwa Hammami and Karen Wong for able research assistance, Tony Brown at the Association of Football Statisticians for the data the Hoover Institution for its hospitality, and the Spanish Ministerio de Ciencia y Tecnologia for financial support (grant BEC 2003-08182). The Gauss programs used in this paper were kindly provided by Bruce E. Hansen. Any errors are mine alone.     

基于灰色关联度和理想解法的决策方法研究

引入灰色系统理论对传统理想解法(TOPSIS)进行了拓展,提出了一种基于灰色关联度和理想解法(TOP-SIS)的决策方法。该方法将欧氏距离和灰色关联度有机结合,构造了一种新的相对贴近度以实现对方案的评价。新贴近度同时反映了方案与理想方案和负理想方案之间的位置关系和数据曲线的相似性差异,物理含义更加明确。最后通过一个供应商选择的示例进一步说明了方法的应用步骤。     

Imputation by power transformation

In this paper, a new power transformation estimator of population mean in the presence of non-response has been suggested. The estimator of mean obtained from proposed technique remains better than the estimators obtained from ratio or mean methods of imputation. The mean squared error of the resultant estimator is less than that of the estimator obtained on the basis of ratio method of imputation for the optinum choice of parameters. An estimator for estimating a parameter involved in the process of new method of imputation has been discussed. The MSE expressions for the proposed estimators have been derived analytically and compared empirically. Product method of imputation for negatively correlated variables has also been introduced. The work has been extended to the case of multi-auxiliary information to be used for imputation.