Nonparametric statistical procedures for the changepoint problem

Let X₁,…,X_r?1,X_r,X_r+1,…,X_n be independent, continuous random variables such that X_i, i = 1,…,r, has distribution function F(x), and X_i, i = r+1,…,n, has distribution function F(x?Δ), with -∞ <Δ< ∞. When the integer r is unknown, this is refered to as a change point problem with at most one change. The unknown parameter Δ represents the magnitude of the change and r is called the changepoint. In this paper we present a general review discussion of several nonparametric approaches for making inferences about r and Δ.     

Generalized Bhaskar Rao designs

Generalized Bhaskar Rao designs with non-zero elements from an abelian group G are constructed. In particular this paper shows that the necessary conditions are sufficient for the existence of generalized Bhaskar Rao designs with k=3 for the following groups: ?G? is odd, G=Z^r₂, and G=Z^r₂×H where 3? ?H? and r?1. It also constructs generalized Bhaskar Rao designs with υ=k, which is equivalent to υ rows of a generalized Hadamard matrix of order n where υ?n.     

Selection of regressors in econometrics: parametric and nonparametric methods selection of regressors in econometrics

The present paper addresses the selection-of-regressors issue into a general discrimination framework. We show how this framework is useful in unifying various procedures for selecting regressors and helpful in understanding the different strategies underlying these procedures. We review selection of regressors in linear, nonlinear and nonparametric regression models. In each case we successively consider model selection criteria and hypothesis testing procedures.     

Limit theory of generalized order statistics

Generalized order statistics (gos) were introduced by Kamps [1995. A Concept of Generalized Order Statistics. Teubner, Stuttgart] to unify several models of ordered random variables (rv's), e.g., (ordinary) order statistics (oos), records, sequential order statistics (sos). In a wide subclass of gos that includes oos and sos, the possible limit distribution functions (df's) of the maximum gos are obtained in Nasri-Roudsari [1996. Extreme value theory of generalized order statistics. J. Statist. Plann. Inference 55, 281–297]. In this paper, for this subclass, necessary and sufficient conditions of weak convergence, as well as the form of the possible limit df's of extreme, intermediate and central gos are derived. These results are extended to a wider subclass.     

团组织的现实困境与创新之路

当前,团组织尤其是中学团组织存在的困惑和问题主要表现：极易受到忽视、团干部力量不足配备、团组织建设缺乏经费等方面。这些困惑和问题的产生,既与中学团组织自身的建设不力相关,也与学校党政部门的支持引导不够以及社会支持合力尚未完全形成相连。现实困境下中学团组织要实现创新发展,应着力做到：以团干部思想建设和能力建设为核心,逐渐完善团干部的培训、监督、考核和评价机制;以建设团结、和谐的中学团组织为目标,通过和谐团组织建设不断繁荣校园文化、推进校园和谐;着力处理好团组织与其他各方的关系,构建特色鲜明、务实创新的团组织。     

录音制品二次使用规整之检讨

文章结合立法资料,分析了现行著作权法对录音制品二次使用的法律规整。文章指出著作权法对广播组织和表演者及录音制品制作者的关系未作规定,乃是立法者从保护广播组织的法律政策出发,让广播组织就此不承担法律义务的一种有意安排,其并非法律漏洞,法官不得进行漏洞补充,必须严格依照立法者意志作出裁决。针对该项规整,文章批评了其立法技术缺陷带来的不合理结果,提出了修改建议。     

诗歌教学的意境分析

意境是诗歌的生命,诗歌教学必须分析意境。分析诗歌的意境,就是要具体分析诗人概括描绘的生活形象,把诗中的形象呈现在学生面前;揭示形象的内在本质和精神,让学生从中领悟到更多、更深远的东西;挖掘诗人在形象中所灌注、渗透的情与理,让学生受到直接的情感感染和心智启迪。     

新疆南疆兵团第二产业结构协调性研究

1999--2008这十年的经济统计数据表明,南疆兵团存在着影响经济可持续发展的一系列问题。主要是：第二产业与第一、三产业协同性弱,产业结构缺乏市场调节作用,轻重工业比例失衡,就业结构与经济协调能力不足,等等。应在加大工业投入力度、处理好新型工业化与农业产业化关系、加快第二产业结构升级、加强信息化建设等几方面着力,尽快改变局面。     

论规范场论中的约束与规范自由度的关系

在近年来的有关粒子与规范场论的许多文献中均曾断言:在规范场论中,无论内蕴的还是次级的第一类约束均与其规范自由度有关,从而将其引入到系统演化的生成元与生成程序中。本文旨在通过实例分析证明上述断言确有不妥之处,正确的结论应是:次级的第一类约束与规范自由度并无关系,只有内蕴的第一类约束才产生规范自由度。     

Search designs for 2m factorials derived from balanced arrays of strength 2(l+1) and ad-optimal search designs

We consider a search design for the 2^m type such that at most knonnegative effects can be searched among (l+1)-factor interactions and estimated along with the effects up to l- factor interactions, provided (l+1)-factor and higher order interactions are negligible except for the k effects. We investigate some properties of a search design which is yielded by a balanced 2^m design of resolution 2l+1 derived from a balanced array of strength 2(l+1). A necessary and sufficient condition for the balanced design of resolution 2l+1 to be a search design for k=1 is given. Optimal search designs for k=1 in the class of the balanced 2^m designs of resolution V (l=2), with respect to the AD-optimality criterion given by Srivastava (1977), with N assemblies are also presented, where the range of (m,N) is (m=6; 28≤N≤41), (m=7; 35≤N≤63) and (m=8; 44≤N≤74).