Robust statistics for testing equality of means or variances

For testing the equality of means (location parameters) of two populations, Tiku (1980a) defined a statistic Tc (based on symmetrically censored samples) and showed that this statistic is robust to underlying populations and is also remarkably powerful. In this paper, we define a similar statistic T (based on samples s with observations censored only on one side) and show that this stat is tic is more powerful than T and nonparametric statistics, C for skew populations. We also provide a modification of this statistic for testing the equality of two population variances.     

数学与书法艺术

数学方法一直为书论家和书法家们所沿用 ,它表现在点线、架构和章法、意趣的理论、艺术实践与教学的各个方面。文字发源于符号 ,大篆 (含甲骨 )和草书 (含行书 )是圆形书法 ,其他书体是方形书法     

基点切入、分范畴分层次系统梳理的思想方法

基点切入、分范畴分层次系统梳理方法指的是以文明范畴基点层次为切入点和起点，沿着范畴内部层次关系系列逐层研究、系统梳理的一种语言研究理念。该方法是针对汉语词句确认类瓶颈问题的解决而提出的，也可作为汉语研究的一般方法使用。     

论马克思主义哲学发展观的重构

在马克思主义哲学发展观的教育和宣传方面，至今存在着许多重大的误区和缺陷，有必要根据时代的要求和学术的进展重新理解和建构马克思主义哲学的发展观。     

Construction of stationary state distributions for loss systems

A stationary state distribution will be constructed for a loss system G/G/m/0 without additional restrictive conditions. It will be shown by examples that for a given input there may exist several stationary state distributions. A sufficient and necessary criterion for the uniqueness will be formulated.     

Detecting change points and monitoring biomedical data

Bayesian and likelihood approaches to on-line detecting change points in time series are discussed and applied to analyze biomedical data. Using a linear dynamic model, the Bayesian analysis outputs the conditional posterior probability of a change at time t ? 1, given the data up to time t and the status of changes occurred before time t ? 1. The likelihood method is based on a change-point regression model and tests whether there is no change-point.     

Mixed-Poisson Point Process with Partially-Observed Covariates: Ecological Momentary Assessment of Smoking

Ecological Momentary Assessment is an emerging method of data collection in behavioral research that may be used to capture the times of repeated behavioral events on electronic devices, and information on subjects' psychological states through the electronic administration of questionnaires at times selected from a probability-based design as well as the event times. A method for fitting a mixed Poisson point process model is proposed for the impact of partially-observed, time-varying covariates on the timing of repeated behavioral events. A random frailty is included in the point-process intensity to describe variation among subjects in baseline rates of event occurrence. Covariate coefficients are estimated using estimating equations constructed by replacing the integrated intensity in the Poisson score equations with a design-unbiased estimator. An estimator is also proposed for the variance of the random frailties. Our estimators are robust in the sense that no model assumptions are made regarding the distribution of the time-varying covariates or the distribution of the random effects. However, subject effects are estimated under gamma frailties using an approximate hierarchical likelihood. The proposed approach is illustrated using smoking data.     

让住宅建设真正成为我国新的经济增长点

在借鉴发达国家经验教训、密切联系中国实际的基础上 ,提出了住宅建设真正成为我国新的经济增长点的具体办法和措施 :一是大量兴建经济适用住房 ,形成整个国民经济的良性循环 ;二是实现住房商品化 ,启动房地产市场 ;三是加强宏观调控 ,规范房地产市场。我国的住宅建设作为经济增长点 ,其拉动经济增长的作用会日益显现出来。     

Forecasting future values of changing sequences

Sequences of independent random variables are observed and on the basis of these observations future values of the process are forecast. The Bayesian predictive density of k future observations for normal, exponential, and binomial sequences which change exactly once are analyzed for several cases. It is seen that the Bayesian predictive densities are mixtures of standard probability distributions. For example, with normal sequences the Bayesian predictive density is a mixture of either normal or t-distributions, depending on whether or not the common variance is known. The mixing probabilities are the same as those occurring in the corresponding posterior distribution of the mean(s) of the sequence. The predictive mass function of the number of future successes that will occur in a changing Bernoulli sequence is computed and point and interval predictors are illustrated.     

发掘特色 培育特色 创新特色——试论新世纪转型中的回族学走向及其研究重点

本文通过对我国回族学历史与现状的分析 ,提出进一步完善回族学基本理论体系 ,培养回族学学科带头人来带动学科水平的提高 ,尽快组建国内回族学研究中心和收、藏、用三位一体的回族图书文献网络中心 ,是当前回族学研究和发展的一项刻不容缓的重要任务