正式英语的语言特征

正式英语是人们在辩论、演讲、写作和各种仪式等正式场合中使用的标准英语。掌握正式英语的语体风格、词汇色彩和语法结构 ,对英语学习者提高语言交际水平 ,增强英语语感大有裨益     

一个汉英机器翻译系统中的语义处理模型

简略阐述了三种语义分析理论 -配价语法 ,格语法 ,论旨理论后 ,重点介绍了机器翻译系统所采用的语义模型     

Backfitting Random Varying-Coefficient Models with Time-Dependent Smoothing Covariates

Abstract.  In this paper, we propose a random varying-coefficient model for longitudinal data. This model is different from the standard varying-coefficient model in the sense that the time-varying coefficients are assumed to be subject-specific, and can be considered as realizations of stochastic processes. This modelling strategy allows us to employ powerful mixed-effects modelling techniques to efficiently incorporate the within-subject and between-subject variations in the estimators of time-varying coefficients. Thus, the subject-specific feature of longitudinal data is effectively considered in the proposed model. A backfitting algorithm is proposed to estimate the coefficient functions. Simulation studies show that the proposed estimation methods are more efficient in finite-sample performance compared with the standard local least squares method. An application to an AIDS clinical study is presented to illustrate the proposed methodologies.     

LENGTH-BIASING, CHARACTERIZATIONS OF LAWS AND THE MOMENT PROBLEM

A positive random variable X with a finite mean has an induced length-biased law represented by Y, and Y is stochastically larger than X. An independent uniform random contraction of Y, UY, has the same law as X if and only if the latter is exponential. This property is extended to non-uniform contractions and a more general notion of length-biasing. The distributional equality of X and W leads to a functional equation for the moment function of X, which has either Infinitely many solutions or none. When U is constant, X can have a log-normal law, but it can also have laws with the same moment sequence as this log-nod law. The case where U has a certain beta, or generalized beta, law give t3 characterizations of generalized gamma laws, or to products of independent copies of them. This occurs even when these laws are not determined by their moment sequences.     

音系层、词汇语法层与语义层三位一体的英语教学

韩礼德的系统功能语法直接和间接地激发了许多新的教学理论和方法的产生。英语教学中应尝试把该语法的六个核心思想之一的“层次的思想”与英语词汇教学联系起来,通过音系层、词汇语法层和语义层三位一体的英语教学法提高学生的英语综合知识和技能。     

基于互信息的功能磁共振图像配准

互信息作为衡量两幅图像配准的相似性测度函数,当两幅图像配准时,互信息达到最大值。该文提出了基于互信息脑功能磁共振图像配准新方法,采用了无需计算梯度的Powell直接搜索算法,并通过多分辨的方式加快了图像配准速度。磁共振的配准实验证明,互信息法能准确地实现多模态医学图像的配准,并且能达到亚像素的精度。     

植物功能基因组学手段

综述了近几年发展起来的几种植物功能基因组学手段，对这些方法的优缺点作了比较．并讨论了植物功能基因组学的发展前景。     

四川岳池顾县话的语法

本文描述了顾县话的一些有特点的语法现象,如语缀、重叠式构词、方位名词、量词、助词等。同时也说明了顾县话受到的西南官话的影响和湘方言对顾县话的影响。     

娄底方言语法三题

举例性介绍娄底方言中的语法现象,分为三部分,即:(1)一些词的词性、用法与普通话的同异;(2)几个特殊的活用词;(3)特殊的词缀“公”、“里”。     

现代汉语语义学研究述要

语义研究问题是现代汉语研究的重点和难点之一。通过对汉语经典语义学以及西方现代语义学研究的历史回顾,结合汉语语言事实,对各种语义流派给予评估,希冀能找出一种适合汉语的语义学研究方法。