ASSESSING CONGRUENCEAMONG DISTANCE MATRICES: SINGLE-MALT SCOTCH WHISKIES REVISITED

A test of congruence among distance matrices is described. It tests the hypothesis that several matrices, containing different types of variables about the same objects, are congruent with one another, so they can be used jointly in statistical analysis. Raw data tables are turned into similarity or distance matrices prior to testing; they can then be compared to data that naturally come in the form of distance matrices. The proposed test can be seen as a generalization of the Mantel test of matrix correspondence to any number of distance matrices. This paper shows that the new test has the correct rate of Type I error and good power. Power increases as the number of objects and the number of congruent data matrices increase; power is higher when the total number of matrices in the study is smaller. To illustrate the method, the proposed test is used to test the hypothesis that matrices representing different types of organoleptic variables (colour, nose, body, palate and finish) in single‐malt Scotch whiskies are congruent.     

日本政府"内向型"战争追悼理念及其成因

战后日德两国政府的战争追悼理念明显呈现"内向型"与"外向型"之差异。只向本国的战争罹难者特别是战死"皇军"将士和被处决战犯表示哀悼而拒绝向被侵略国家为数更多的死难者致哀,是日本政府"内向型"战争追悼理念的主要特征。其成因主要有四:"自卫战争史观"、"解放战争史观"、"靖国史观"等错误的历史观,是其形成的思想根源;日本政要的右派构成和日本政权的保守性质,是其形成的政治基础;战后秉持错误历史观的日本国民的大量存在,是其形成的社会土壤;战后宽松的国际地缘政治环境,是其形成的外部条件。     

Lower bounds on expectations of positive L-statistics from without-replacement models

We consider samples drawn without replacement from finite populations. We establish optimal lower non-negative and upper non-positive bounds on the expectations of linear combinations of order statistics centered about the population mean in units generated by the population central absolute moments of various orders. We also specify the general results for important examples of sample extremes, Gini mean differences and sample range. The paper completes the results of Papadatos and Rychlik [2004. Bounds on expectations of L-statistics from without replacement samples. J. Statist. Plann. Inference 124, 317–336], where sharp negative lower and positive upper bounds on the expectations of the combinations were presented for the without-replacement samples.     

Wilcoxon–Mann–Whitney test for stratified samples and Efron's paradox dice

Two-treatment multi-center clinical trials are the most common type of clinical trials in practice. The aim of this paper is to discuss a curious property of certain standard nonparametric procedures used in the analysis of such clinical trials. Different analyses of a simulated data example are presented, which lead to contrasting and surprising results. The source of the potentially misleading outcome is then explored while relating the simulated data with the concept of Efron's paradox dice and the notion of nontransitivity. With the root of the problem established, an alternate nonparametric method from the literature is shown to address the problem. Finally, pointing out an interpretational concern of using the alternate procedure, a modification to this procedure is also suggested and corresponding theoretical results are presented.     

湖北省高校科技成果转化的现状调查与分析

通过对高校科技工作管理者、高校教师以及部分企业的调研发现,目前影响湖北省高校科技成果转化的因素主要是政府管理、资金投入、高校观念转变与机制创新、企业重视等方面,并提出相应的对策与建议.     

日本人学汉语的语音难点和教学对策

日本人学汉语在语音上存在一些难点和偏误,例如声母中常把舌根擦音h[x]、唇齿音f[f]发成双唇擦音(吹气音)[Φ]、舌尖音(包括舌尖前音z、c、s和舌尖后音zh、ch、sh)和舌面音(j、q、x)发不准、边音l被发成鼻音、闪音或擦音;韵母中常把紧元音发成松元音、圆唇音u[u]、ü[y]发不准、前鼻音与后鼻音读不准。要解决这些问题,应该采取针对性强的对策,以提高对日汉语教学的效率。     

水杨酸-邻菲罗啉三元稀土配合物的合成、表征及抑菌作用

在无水乙醇溶液中合成了六种水杨酸-邻菲罗啉-三元稀土配合物,采用元素分析,红外光谱,差热热重等测试方法进行表征,确定配合物的化学组成为RE(Phen)2(Sa l)2C l.H2O(RE=L a3+,P r3+,N d3+,Sm3+,G d3+,D y3+).研究了稀土配合物的抑菌活性,结果表明三元稀土配合物的抑菌效果较单独的稀土氯化物、邻菲罗啉和水杨酸好.     

Test for homogeneity in Hardy–Weinberg normal mixture model

The phenotype of a quantitative trait locus (QTL) is often modeled by a finite mixture of normal distributions. If the QTL effect depends on the number of copies of a specific allele one carries, then the mixture model has three components. In this case, the mixing proportions have a binomial structure according to the Hardy–Weinberg equilibrium. In the search for QTL, a significance test of homogeneity against the Hardy–Weinberg normal mixture model alternative is an important first step. The LOD score method, a likelihood ratio test used in genetics, is a favored choice. However, there is not yet a general theory for the limiting distribution of the likelihood ratio statistic in the presence of unknown variance. This paper derives the limiting distribution of the likelihood ratio statistic, which can be described by the supremum of a quadratic form of a Gaussian process. Further, the result implies that the distribution of the modified likelihood ratio statistic is well approximated by a chi-squared distribution. Simulation results show that the approximation has satisfactory precision for the cases considered. We also give a real-data example.     

高校科研管理工作的几点思考

本文从五个方面对高校科研管理工作进行了阐述,提出了一些自己的看法,旨在进一步改进科研管理工作.     

现代日本图书馆立法对我国图书馆界的启示

现代日本图书馆立法 ,是现代日本文化教育法域的一个重要组成部分 ,它在推动战后日本文化教育的发展以及“科教兴国”起到了强大作用 ,同时也积累了一定的立法经验 ,本文旨在于为我国图书馆立法提供有益的参考。