多标准决策表中发现概率规则的变精度粗糙集方法

用优势关系代替不可分辨关系,本文提出了一种可以从多标准决策表中获取概率规则的扩展变精度粗糙集模型,该模型能够处理多标准决策表中可能的不一相容性,获取由偏好对象组成的概率决策规则集,并导出事例决策系统的偏好模型。研究结果表明:基于优势关系,从多标准决策表中获取的最小概率规则集,使用的条件数量较少,且导出规则的数量较少、较强。     

竞技体育训练模式在普通高校乒乓球专项课程中的应用

通过实验比较、技术分析、体能测试等方法,对我校2007级新生乒乓球专项课运用竞技体育训练模式进行了教学实验探索.经过两学年的教学实践,收到了良好的效果,有效地激发了学生的学习兴趣,提高了学生的专项技术水平和体育能力,增强了学生的自信心,促进了他们身心健康的全面发展.     

Adjusted Wilcoxon signed rank test tables for ratio of percentiles

The ordinary Wilcoxon signed rank test table provides confidence intervals for the median of one population. Adjusted Wilcoxon signed rank test tables which can provide confidence intervals for the median and the 10th percentile of one population are created in this paper. Base-(n + 1) number system and theorems about property of symmetry of the adjusted Wilcoxon signed rank test statistic are derived for programming. Theorem 1 states that the adjusted Wilcoxon signed rank test statistic are symmetric around n(n + 1)/4. Theorem 2 states that the adjusted Wilcoxon signed rank test statistic with the same number of negative ranks m are symmetric around m(n+1)/2. 87.5% and 85% confidence intervals of the median are given in the table for n = 12, 13,…, 29 to create approximated 95% confidence intervals of the ratio of medians for two independent populations. 95% and 92.5% confidence intervals of the 10th percentile are given in the table for n = 26, 27, 28, 29 to create approximated 95% confidence regions of the ratio of the 10th percentiles for two independent populations. Finally two large datasets from wood industry will be partitioned to verify the correctness of adjusted Wilcoxon signed rank test tables for small samples.     

A nonparametric procedure for testing partially ranked data

In consumer preference studies, it is common to seek a complete ranking of a variety of, say N, alternatives or treatments. Unfortunately, as N increases, it becomes progressively more confusing and undesirable for respondents to rank all N alternatives simultaneously. Moreover, the investigators may only be interested in consumers’ top few choices. Therefore, it is desirable to accommodate the setting where each survey respondent ranks only her/his most preferred k (k?N) alternatives. In this paper, we propose a simple procedure to test the independence of N alternatives and the top-k ranks, such that the value of k can be predetermined before securing a set of partially ranked data or be at the discretion of the investigator in the presence of complete ranking data. The asymptotic distribution of the proposed test under root-n local alternatives is established. We demonstrate our procedure with two real data sets.     

Habits and orders of everyday life: commensal adjustment in Anglo‐French couples

This paper examines processes of habit reshuffling and change in different contexts of household formation, looking specifically at habits regarding eating and commensality. It is based on a study of 14 couples, each with one English and one French partner, half of whom live in France, half in England. We examine the interplay between partners, their determination to eat together as a couple, and the various ‘orders’ associated with their commensal pact (diets, routines, extra‐marital commensality), both when they start as couples and as parents of young children. We draw on the specificity of cross‐national couple experience to cast light on processes of adjustment – to one another, and to the new country of residence for the migrant partner. In particular, we explore the potential of notions of ‘split’ and ‘solid’ ‘patrimonies of incorporated habits’, ‘re‐shuffling’ of habits and dispositions, and ‘habit memory’, to characterize the dynamics of habits at play in each of the orders under scrutiny. Overall, the paper contributes to the analysis of habit as the ‘stuff’ of orders of everyday life.     

Robust principal component analysis for compositional tables

A data table arranged according to two factors can often be considered a compositional table. An example is the number of unemployed people, split according to gender and age classes. Analyzed as compositions, the relevant information consists of ratios between different cells of such a table. This is particularly useful when analyzing several compositional tables jointly, where the absolute numbers are in very different ranges, e.g. if unemployment data are considered from different countries. Within the framework of the logratio methodology, compositional tables can be decomposed into independent and interactive parts, and orthonormal coordinates can be assigned to these parts. However, these coordinates usually require some prior knowledge about the data, and they are not easy to handle for exploring the relationships between the given factors. Here we propose a special choice of coordinates with direct relation to centered logratio (clr) coefficients, which are particularly useful for an interpretation in terms of the original cells of the tables. With these coordinates, robust principal component analysis (rPCA) is performed for dimension reduction, allowing to investigate relationships between the factors. The link between orthonormal coordinates and clr coefficients enables to apply rPCA, which would otherwise suffer from the singularity of clr coefficients.     

甘南藏族自治州男性人口生命表和死亡分析

本文用Brass曾生子女存活比估算儿童死亡率的方法和Gompertz死亡率定律等方法对甘南藏族自治州的“五普”男性人口的死亡和生存原始数据作了进一步的修匀和校正。在此基础上。我们用Farlle死亡概率法编制出了甘南藏族自治州男性人口的简略生命表．并通过生命表的结果分析了甘南州男性人口的死亡水平、死亡模式和死亡的性别格局。     

光学平台隔振系统结构参数的优化设计

针对使用空气弹簧隔振器的光学平台传递函数进行了研究.对平台固有频率和传递函数的计算结果进行曲面拟合,并利用拟合曲面形成目标函数,进行平台隔振系统结构参数的优化设计计算.结果表明,要获得最佳隔振效果,应取相对阻尼系数ξ越小越好,但ξ过小使系统稳定性变差.最优值ξ为0.1～0.15,主空气室与附加空气室的容积比k为0.28.     

海南旧谱牒的功能和新谱牒纂修中的民间立场

谱牒是一个家族的生命史。海南谱牒以本族源流为先导 ,以世系图表为核心 ,着重记述了始迁祖以降的族脉延续。旧谱牒有着以族田等经济手段维系族众、以家法族规与国法互为补充等功能 ;新谱牒则呈现着内源性确证和族史考辨的个体写作实践与民间立场。     

Self-employment disadvantage in the working lives of blacks and females

Self-employment, regardless of its quality, offers the advantage of keeping individuals employed, thereby contributing to a continuous work history and earnings over the lifetime. But in the individual life cycle, how important is self-employment, particularly given evidence that self-employment spells tend to be of short duration? Also, to what extent does self-employment contribute to race and gender differences in lifetime employment? We use an increment-decrement life table to analyze the role of self-employment in differentiating the working lifetimes of blacks and women from those of white men. White men's average lifetime years spent in self-employment exceed black men's by as many as six years, thus accounting for nearly the entire difference between whiteand black men's lifetime years employed. White women's self-employment episodes,while almost as numerous as white men's, are shorter and less connected towage-employment episodes. Black women's self-employment episodes are bothinfrequent and of short duration.