现代室内设计审美的综合表征

从美学的角度分析现代室内设计应具备的审美特征、审关功能、审美情趣。分析认为,现代室内设计审美的综合表征包括空间形式、比例、边界、照明、音响、内外空间的联系及其所表现出来的秩序美;让人在有序的整体中感受到舒适,在多样统一中得到乐趣。同时认为,在设计中自觉融入传统民族文化之美,既体现出民族文化精神气质,又能适应时代的发展;并能创造出和谐的意境之美,达到技术美和艺术美的统一。     

对人口学学科体系的重新认识

人口学是一门方兴未艾的朝阳科学 ,2 1世纪正是人口科学的用武之时 ,人口学科学体系构成的研究是人口学研究中的重要环节。国内外学者对人口学学科体系的认识并不统一 ,对重大人口学问题的看法也有待商榷。人口学分支学科是人口科学研究进一步深入的载体 ,是人口科学发展与创新的新的增长点     

Excel实现的试卷质量分析表

试卷质量分析涉及到教育统计与测量方面的专门知识,往往借助于专门的程序设计语言编程来实现。本文介绍用Excel2000实现的试卷质量分析表,重点阐述公式计算、数据有效性验证、数据安全、界面设计等方面的技术细节。     

因材施教促进课堂教学最优化

中等职业学校学生文化基础薄弱,接受能力差,而《医学统计学》课程教学要求高,学科特点抽象,学生掌握难度大。针对这种现状,要从确定科学的教学目标,创造和谐的课堂氛围,运用高超的授课艺术,加强学生的思维训练四个方面入手,促进课堂教学最优化,提高课堂教学效率与质量。     

Symmetrically distributed and unbiased estimators in linear models

Let Y be distributed symmetrically about Xβ. Natural generalizations of odd location statistics, say T‘Y’, and even location-free statistics, say W‘Y’, that were used by Hogg ‘1960, 1967)’ are introduced. We show that T‘Y’ is distributed symmetrically about β and thus E[T‘Y’] = β and that each element of T‘Y’ is uncorrelated with each element of W‘Y’. Applications of this result are made to R-estiraators and the result is extended to a multivariate linear model situation.     

A binary control chart to detect small jumps

The classic N p-chart gives a signal if the number of successes in a sequence of independent binary variables exceeds a control limit. Motivated by engineering applications in industrial image processing and, to some extent, financial statistics, we study a simple modification of this chart, which uses only the most recent observations. Our aim is to construct a control chart for detecting a shift of an unknown size, allowing for an unknown distribution of the error terms. Simulation studies indicate that the proposed chart is superior in terms of out-of-control average run length, when one is interested in the detection of very small shifts. We provide a (functional) central limit theorem under a change-point model with local alternatives, which explains that unexpected and interesting behaviour. Since real observations are often not independent, the question arises whether these results still hold true for the dependent case. Indeed, our asymptotic results work under the fairly general condition that the observations form a martingale difference array. This enlarges the applicability of our results considerably, first, to a large class of time series models, and, second, to locally dependent image data, as we demonstrate by an example.     

分部积分教学有效课堂的探究

高等职业教育是职业技术教育的高级阶段，是培养高等技术应用型人才的教育。针对高等职业教育的特点，通过多年数学教学，以分部积分的课堂教学为例，对有效课堂的构建问题进行了不懈的探索。     

On testing for causality in variance between two multivariate time series

Verifying the existence of a relationship between two multivariate time series represents an important consideration. In this article, the procedure developed by Cheung and Ng [A causality-in-variance test and its application to financial market prices, J. Econom. 72 (1996), pp. 33–48] designed to test causality in variance for univariate time series is generalized in several directions. A first approach proposes test statistics based on residual cross-covariance matrices of squared (standardized) residuals and cross products of (standardized) residuals. In a second approach, transformed residuals are defined for each residual vector time series, and test statistics are constructed based on the cross-correlations of these transformed residuals. Test statistics at individual lags and portmanteau-type test statistics are developed. Conditions are given under which the new test statistics converge in distribution towards chi-square distributions. The proposed methodology can be used to determine the directions of causality in variance, and appropriate test statistics are presented. Monte Carlo simulation results show that the new test statistics offer satisfactory empirical properties. An application with two bivariate financial time series illustrates the methods.     

Moments-Based Approximation to the Renewal Function

Asymptotic behavior of the number of independent identically distributed observations in a left or right neighborhood of k _n th order statistic from the sample of size n, for k _n /n → α ? [0, 1], is studied. It appears that the limiting laws are of the Poisson type.     

Asymptotic distributions of order statistics and record values arising from the class of beta-generated distributions

In this paper, we show that both the class of beta-generated distributions G_F and its base distribution F belong to the same domain of maximal (or minimal or upper record value or lower record value) attraction. Moreover, it is shown that the weak convergence of any non-extreme order statistic (central or intermediate order statistic), based on a base distribution F, to a non-degenerate limit type implies the weak convergence of G_F to a non-degenerate limit type. The relations between the two limit types are deduced.