A family of bivariate binomial distributions generated by extreme bernoulli distributions

In this paper, bivariate binomial distributions generated by extreme bivariate Bernoulli distributions are obtained and studied. Representation of the bivariate binomial distribution generated by a convex combination of extreme bivariate Bernoulli distributions as a mixture of distributions in the class of bivariate binomial distribution generated by extreme bivariate Bernoulli distribution is obtained. A subfamily of bivariate binomial distributions exhibiting the property of positive and negative dependence is constructed. Some results on positive dependence notions as it relates to the bivariate binomial distribution generated by extreme bivariate Bernoulli distribution and a linear combination of such distributions are obtained.     

英语边缘介词的探讨

英语界对摫咴到榇蕯的提法较模糊，尚无系统的阐述，文章通过对其定义、特点和分类进行较全面的分析，尤其是对边缘介词中最活跃的部分棗分词介词作了细致探讨，旨在唤起英语工作者和读者关注此类摫咴禂词的存在，并掌握英语边缘介词的使用规律．     

虚拟城市及其基本特征

虚拟城市就是人类利用虚拟技术构建的最具规模的虚拟现实 ,主要指谓塞博空间和塞博时间中的城市 ,本质上是一种信息化城市。它能为现实城市创造更多的新空间 ,包括新的工业园、科技园、电子产业基地。在虚拟城市中 ,由于电子通信系统的发展 ,使人类日常生活发生许多质的改变。它将推动未来巨型城市的形成与发展 ,给人类创造更多、更美好的生存空间。     

中国城镇居民10年消费结构变化实证研究

通过运用扩展线性支出系统模型(ELES)对城镇居民边际消费倾向和需求收入弹性进行实证研究，得出我国城镇居民满足吃、穿为主的生存型消费需求阶段已经结束，逐步向以发展型和享受型阶段过渡．同时预测恩格尔系数会继续下降，高层次消费项目将成为新的消费增长点．最后针对我国城镇居民消费结构变化提出政策性建议．     

A Mixed Model Approach for Geoadditive Hazard Regression

Abstract.  Mixed model based approaches for semiparametric regression have gained much interest in recent years, both in theory and application. They provide a unified and modular framework for penalized likelihood and closely related empirical Bayes inference. In this article, we develop mixed model methodology for a broad class of Cox-type hazard regression models where the usual linear predictor is generalized to a geoadditive predictor incorporating non-parametric terms for the (log-)baseline hazard rate, time-varying coefficients and non-linear effects of continuous covariates, a spatial component, and additional cluster-specific frailties. Non-linear and time-varying effects are modelled through penalized splines, while spatial components are treated as correlated random effects following either a Markov random field or a stationary Gaussian random field prior. Generalizing existing mixed model methodology, inference is derived using penalized likelihood for regression coefficients and (approximate) marginal likelihood for smoothing parameters. In a simulation we study the performance of the proposed method, in particular comparing it with its fully Bayesian counterpart using Markov chain Monte Carlo methodology, and complement the results by some asymptotic considerations. As an application, we analyse leukaemia survival data from northwest England.     

摄影文学：徜徉于图像与文字之间的边缘文体

摄影与文学的联姻对艺术意味着综合性的某种复兴,它为读者提供视觉与心灵上的美感和愉悦。摄影文学作为一种自在的边缘文体具有其独特的审美个性,创作主体用情感的链条将抽象符号与具象符号加以熔铸和化合,或传达情思,或营造意境,或寓含象征,从而构成具有内质生命的新的完整形象,展现出特殊的艺术表达效果。     

论杜甫的边缘焦虑及其影响

边缘焦虑是杜甫人格构成的重要因素。边缘焦虑限制了杜甫对理想自我的设计和追求 ,使其社会生活呈现以官府为中心的显著特征 ;边缘焦虑还培植了杜甫的京城情结 ,促进其诗歌创作与社会现实和国家政治生活紧密关联。     

Efficient Estimation in Marginal Partially Linear Models for Longitudinal/Clustered Data Using Splines

Abstract.  We consider marginal semiparametric partially linear models for longitudinal/clustered data and propose an estimation procedure based on a spline approximation of the non-parametric part of the model and an extension of the parametric marginal generalized estimating equations (GEE). Our estimates of both parametric part and non-parametric part of the model have properties parallel to those of parametric GEE, that is, the estimates are efficient if the covariance structure is correctly specified and they are still consistent and asymptotically normal even if the covariance structure is misspecified. By showing that our estimate achieves the semiparametric information bound, we actually establish the efficiency of estimating the parametric part of the model in a stronger sense than what is typically considered for GEE. The semiparametric efficiency of our estimate is obtained by assuming only conditional moment restrictions instead of the strict multivariate Gaussian error assumption.     

介词融合——双宾语结构的形态句法成因

基于Baker的融合理论(Incorporation Theory),人们通过对英、汉双宾语结构的对比分析会发现,在英、汉双宾语结构中存在着介词融合现象。双宾语结构是“单宾语”及物动词经历了介词融合的语法化过程而形成的句子结构形式,双宾语结构同与格结构存在同源关系。     

新疆少数民族学生汉语介词习得中的空间认知

介词是新疆少数民族学生汉语习得中的难题之一。我们认为,从认知语言学视角出发,探讨汉语与学生母语中与介词、格有关的空间及其隐喻范畴表达,可以为学生介词习得中出现的某些偏误提供解释,透视出学生的中介语认知图式。