Bayesian estimation of multidimensional item response theory model using gibbs sampling

We propose Bayesian parameter estimation in a multidimensional item response theory model using the Gibbs sampling algorithm. We apply this approach to dichotomous responses to a questionnaire on sleep quality. The analysis helps determine the underlying dimensions.     

Causal inference for recurrent events data with all-or-none compliance

ABSTRACT

In this article, causal inference in randomized studies with recurrent events data and all-or-none compliance is considered. We use the counting process to analyze the recurrent events data and propose a causal proportional intensity model. The maximum likelihood approach is adopted to estimate the parameters of the proposed causal model. To overcome the computational difficulties created by the mixture structure of the problem, we develop an expectation-maximization (EM) algorithm. The resulting estimators are shown to be consistent and asymptotically normal. We further estimate the complier average causal effect (CACE), which is defined as the difference of the average numbers of recurrence between treatment and control groups within the complier class. The corresponding inferential procedures are established. Some simulation studies are conducted to assess the finite sample performance of the proposed approach.     

Approximating discrete multivariate distributions prom known moments

To approximate the joint distribution of the two-colony stepping-stone model, a finite mixture approach is proposed for constructing discrete multi-variate distributions. This approach generahzes the classic method of linear combinations of independent variables. The stepping-stone model is approximated through matching known moments. Numerical examples from entomology are given. Comparisons are made with the work by Wehrly et al (1993).     

中国与西方七国综合国力最新比较

一、综合国力的涵义及指标体系(一 )综合国力的涵义综合国力是指一个主权国家在一定时期内所拥有的生存和发展的全部实力。由资源力、经济活动力、宏观调控能力、对外经济影响力、社会发展力、外交力、军事力等综合而成。资源力。是一个国家赖以生存和发展的物质基础和基本条件 ,包括自然资源、人力资源两个方面。经济活动力。是指一个国家在一定时期经济建设和整体经济发展的能力 ,包括经济发达程度、发展水平、经济发展速度、经济结构、经济体制和生产力布局等。经济活动力是综合国力的基石和核心部分。宏观调控能力。是指一个国家对宏观…     

Some results on generalized ageing classes

In this paper we provide new results about generalized ageing classes on the excess lifetime of a renewal process. We also obtain some characterizations of generalized ageing classes by means of the residual life at random time.     

从墓志看宋代士人家庭的择偶行为

墓志的性质在宋代由哀悼文学转向传记文学，更多地记载墓主个人的事迹。本文通过墓志资料考察宋代士人家庭的择偶行为，进一步了解长辈为子女择偶的状况以及当时社会流行的择偶价值观。     

Maternal Autonomy- and Connectedness-oriented Parenting Behaviors as Predictors of Children's Social Behaviors in China

The purpose of the study was to examine the contributions of maternal encouragement of autonomy and maternal encouragement of connectedness to the prediction of children's social behaviors. A sample of children (N  =  94), initially aged two years, and their mothers in China participated in the two-year longitudinal study. Child autonomy and connectedness and maternal goal-oriented behaviors were assessed at two years of age through the observation of mother–child interactions. Data on children's social participation, prosocial behavior, aggression, and organization/leadership in peer interactions were collected in a follow-up study when the children were four years of age. It was found that maternal encouragement of connectedness significantly predicted children's sociability and organization/leadership behavior, especially for children who were relatively high on autonomy. The results indicated the developmental significance of socialization goal-oriented behaviors in cultural context.     

蒲姑国的族属

根据古籍所记载的蒲姑国和蒲姑部落的名称、地域和史实 ,瑶族民间文献所记载的他们祖先的情况 ,以及苗瑶语和汉语的有关材料 ,作者认为 ,商代的蒲姑部落是瑶族的祖先 ,因此商代的蒲姑国也应该归属于瑶族。     

朝鲜族人口自然增长率下降对发展的影响

本文分析了朝鲜族人口减少的主要原因及负面影响,并提出了解决的对策.     

施肥量与垄作方式对牛蒡子出苗率及苗期生长的影响

从施肥量（高肥、中肥、低肥）、垄作方式（上垄、下垄、下垄覆膜）两因素对牛蒡子的出苗及苗期生长情况做了一些系统观察和分析．结果表明：低肥，上垄有利于出苗，高肥有利于苗期的生长．此研究可为牛蒡子的进一步开发利用及科研提供科学依据．