A comparison of approximations to the distribution of average kendall tau

The average Kendall tau test for the null hypothesis of compLete randomness in n judges' rankings of r objects was introduced by Ehrenberg (1952). The superior efficiency of this test. as measured by approximate Bahadur slope has been established by Alva, Cabilio, and Feigin (1982).

The purpose of this paper is first to provide further justification for the use of this test, and second to compare the accuracy of the asymptotic distribution to other app roxtmations to the null distribution for small values of r and n. In the process we generate tables for this exact dis tribution for r=3 and n=3(1)19, r=4 and n=3(1)9, r=5 and n=3(1)5.     

Nonparametric rank-based test procedures for non-additive models in the two-way layout I. no replications

One of the major unresolved problems in the area of nonparametric statistics is the need for satisfactory rank-based test procedures for non-additive models in the two-way layout, especially when there is only one observation on each combination of the levels of the experimental factors. In this paper we consider an arbitrary non-additive model for the two-way layout with n levels of each factor. We utilize both alignment and ranking of the data together with basic properties of Latin squares to develop rank tests for interaction (non-additivity). Our technique involves first aligning within one of the main effects, ranking within the other main effects (columns and rows) and then adding the resulting ranks within “interaction bands” corresponding to orthogonal partitions of the interaction for the model, as denoted by the letters of an n × n Latin square. A Friedman-type statistic is then computed on the resulting sums. This is repeated for each of (n?1) mutually orthogonal Latin squares (thus accounting for all the interaction degrees of freedom). The resulting (n?1) Friedman-type statistics are finally combined to obtain an overall test statistic. The necessary null distribution tables for applying the proposed test for non-additivity are presented and we discuss the results of a Monte Carlo simulation study of the relative powers of this new procedure and other (parametric and nonparametric) procedures designed to detect interaction in a two-way layout with one observation per cell.     

A New Nonparametric Test for the Umbrella Alternative Problem

In this article, we propose a new nonparametric test for detecting umbrella alternatives. It is designed to improve the power of Pan (1996 Pan , G. ( 1996 ). Distribution-free tests for umbrella alternatives . Communications in Statistics—Theory and Methods 25 ( 12 ): 3185 – 3194 .[Taylor & Francis Online], [Web of Science ®] , [Google Scholar])'s test, which is based on the breakdown of umbrella alternatives into a union of simple-ordered alternatives. Distribution-free tests are proposed in the case where the peak of the umbrella is unknown. Some actual data examples and the results of a Monte Carlo power study are also discussed.     

加强高校青年教师队伍建设的思考

当前 ,高校正处于新老教师交替的高峰期 ,青年教师占教师比重较大 ,因此 ,加强青年教师队伍建设关系到后继有人的大问题 ,更关系到高校的改革、发展与稳定。结合目前高校青年教师队伍的状况 ,提出加强青年教师队伍建设的思路。要加强青年教师的政治思想教育工作 ;抓青年骨干教师队伍建设和发挥老教师的“传帮带”作用     

推进高校学科建设中要素建设的思考

学科建设是提升高校整体知识水平的一个重要标识。本文探讨了高校学科建设要素的构成和要素间的相互关系,分析了学科建设中的主体要素和客体要素的作用及功能,提出了推进学科建设中要素建设的途径。     

禄利之途与东汉初期经学新风

东汉初期的经学新风,表现在删繁就简、博览兼通,这种治学方法在两汉之际已经出现,但作为风气,其形成却在此期。形成的原因在于禄利劝学所导致的各学派之间的竞争。新学风的继续发展则超出了捍卫家法的初衷而导向讲求义理、统一经义。偃武修文政策下的经学,不仅表现为浮躁学风,在它之外,沉潜向学的风气也在朝野间滋长。     

探索解决休谟问题的实践方式——读孙伟平《事实与价值》

英国哲学家大卫·休谟在《人性论》中指出 :以往的道德学体系总是先按“是”的规则进行推理 ,但却突然地、不知不觉地过渡到用“应当”提出规范。从“是”过渡到“应当”的根据是什么 ?人们却没有给出相应的证明。[1] 在休谟看来 ,这种从以“是”为系动词的事实命题向以“应当”为系动词的伦理 (价值 )命题之跳跃是缺乏逻辑根据的。这就是所谓休谟问题[2 ] 。休谟问题震动了哲学界。此后 ,西方许多哲学家讨论过这个问题 ,并试图解决这个问题。一时 ,“是”与“应当”、事实与价值、描述与规范、认识与评价、事实判断与价值     

试论九品中正制的发展与蜕变

九品中正制的本意是以德才衡量人物 ,别其高下 ,量才授官 ,以期做到用人公正。由于统治者的利用和门阀势力的膨胀 ,这一制度逐渐蜕变 ,清义的作用日益下降 ,品评人物渐渐为少数贵族所操纵 ,最后只重出身 ,不论德才 ,沦为世家大族巩固特权的工具     

品味大学品位

大学品位是一部特殊的“教科书”。一流大学应有一流的品位。民族责任的分量、伦理的地位、人文的底蕴、个性的鲜明、历史的凝重,乃大学品位的非学术性内容;学术信念、学术理想、学术权力状况及独特的思维,乃大学品位的学术性内容。这两方面相互作用,两者和谐、共生共长,方能形成高品位。对学校高品位建构负有最大责任者乃学校高层领导集体。