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。     

野生花卉在我国北方园林中的应用研究

在现有的城市绿地系统中,千篇一律的园林植物栽培使园林景观单调,且生态效应差。加强野生花卉在园林中的应用可提高城市园林的自然度。我国有着丰富的野生植物资源,其生态习性、观赏特性各异,在园林中的应用方式也多种多样。应积极开展野生花卉的引种驯化等工作,推广野生花卉在园林造景中的应用。     

Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.     

英语功能语法学与英语教学

不同于传统语法所提供的各种语法规则,功能语法学是一种非常丰富的语言描述方法,它关注语言在各种社会语境中使用的不同形态;并且还观察语言所承担的各种社会功能以及对读者或听众所产生的影响。它应当被当成是传统语法的丰富和补充。同时,功能语法提供给教师的是一种很有效的深入理解语篇的方法,并为提高教学质量提供了很多启示。     

广告英语中双关语的翻译

双关语的可译性一直是翻译界争论的热点。语言、文化及表达习惯的差异,使双关语翻译难以兼顾其双重含义。"功能对等"理论以译语读者为中心,注重译文在译语语言和文化环境中所预期达到的功能,为双关语的翻译另辟蹊径。对英语广告中双关语的翻译来说,译文只要能产生与原文相似的广告效应,能使译文读者获得与原文读者近乎相同的感受就是成功的翻译。     

影视翻译初探

本文提出了影视翻译的重要性 ,呼吁翻译届对影视翻译的重视。作者概括了影视语言的五大特点和应遵循的原则与技巧。在坚持传统的“信 ,达 ,雅”翻译观的基础上 ,提出了影视翻译应以“达”(通顺 )为主 ,以译入语观众为目标的功能对等翻译论 ,以期为影视翻译提供一种新的理论视角和操作模式。     

山野菜一点红总多酚提取工艺的研究

对山野菜一点红总多酚的提取影响因素进行了研究，并对提取工艺参数进行了正交优化，试验结果表明山野菜一点红总多酚提取的最佳工艺条件应为液料比为15：1，乙醇浓度为60％，浸体温度为80℃，浸提时间为1h，这种提取工艺可使一点红总多酚的提取率达到94．2％。     

Block external bootstrap in partially linear models with nonstationary strong mixing error terms

The authors extend the block external bootstrap to partially linear regression models with strongly mixing, nonstationary error terms. In addition to providing an approximate distribution for the semiparametric least square estimator of the parametric component, they propose a consistent estimator of the co‐variance matrix of this estimator.