实施网络外语教学应注重的问题

实施网络外语教学应注重的几个问题 ,一是要认真考虑使用网络的教学目的 ,二是网络交流应该结合课程目的而展开 ,三是不能低估网络使用中存在的困难 ,四是在进行网络外语教学时教师必须提供必要的帮助 ,五是要让学生参与确定网络课堂教学的计划和内容     

Empirical likelihood confidence intervals for the mean of a population containing many zero values

If a population contains many zero values and the sample size is not very large, the traditional normal approximation‐based confidence intervals for the population mean may have poor coverage probabilities. This problem is substantially reduced by constructing parametric likelihood ratio intervals when an appropriate mixture model can be found. In the context of survey sampling, however, there is a general preference for making minimal assumptions about the population under study. The authors have therefore investigated the coverage properties of nonparametric empirical likelihood confidence intervals for the population mean. They show that under a variety of hypothetical populations, these intervals often outperformed parametric likelihood intervals by having more balanced coverage rates and larger lower bounds. The authors illustrate their methodology using data from the Canadian Labour Force Survey for the year 2000.     

名词化和语言习得

文章分析了名词化作为一种隐喻的手段在语篇中的作用 ;并分析了名词化同人们认识世界过程的关系。由于在二语习得过程中学生有一个概念重构的过程 ,名词化现象将带来理解上的困难。同时 ,学生具备运用名词化的能力反映了学生英语习得中的进步     

半脆弱印刷数字有意义水印算法研究

数字水印技术是在数字作品中嵌入不明显的记号。该文分析了印刷品制作中包含数模-模数转换过程的特性,与数字水印技术相结合,将纯数字域的防伪手段应用到模拟领域中的印刷品上。将印刷品扫描打印过程作为失真信道进行建模分析,并在算法中加入预失真;比较了数字水印各算法,结合印刷品的特性采用并改进特征值分解的方法,嵌入和检测有意义水印,通过该水印对二次扫描打印印刷品脆弱不可检测,来达到防伪的要求。该算法相对于空域算法和其他变换域算法有复杂度低、检测准确度高的优势。     

The potential of integrated modelling in conservation biology: A case study of the black‐footed albatross (Phoebastria nigripes)

Conservation biology aims at assessing the status of a population, based on information which is often incomplete. Integrated population modelling based on state‐space models appears to be a powerful and relevant way of combining into a single likelihood several types of information such as capture‐recapture data and population surveys. In this paper, the authors describe the principles of integrated population modelling and they evaluate its performance for conservation biology based on a case study, that of the black‐footed albatross, a northern Pacific albatross species suspected to be impacted by longline fishing     

论人民币汇率机制改革的产业转移与结构优化效应——以四川省为例的分析

总体上看,随着人民币汇率形成机制改革的深入,人民币汇率形成更加市场化,人民币继续小幅逐渐升值的可能性非常大。这一进程客观上将导致我国东西部产业转移和结构升级的步伐加快。抓住时机积极承接产业转移的这一机遇,促使产业结构优化,显然是有积极意义的。从经济长远运行角度来看,新的人民币汇率形成机制将有利于产业转移和结构升级,将影响到外商投资的变化,也有利于涉外企业竞争力的提升。     

高职院校“双师型”教师队伍现状分析与对策研究

"双师型"教师是高职院校教育质量提高和教育目标实现的基本保证,但目前我国的高职院校"双师型"教师队伍建设存在着诸多问题,如师资力量不足、职称结构不合理且学历偏低、兼职教师所占比例偏低、教师培训环节薄弱、师资流出现象严重等。为此,国家必须制定相应的政策法规,高职院校也要建立和完善相应的机制,从而保证"双师型"教师队伍的建设。     

Refugee Children in Wales: Coping and Adaptation in the Face of Adversity

This article aims to makes a contribution to redressing a methodological and theoretical imbalance in existing research on refugee and asylum‐seeking children. It draws on two qualitative studies from Wales with children and young people. The samples include unaccompanied minors and children living with families as well as both children who are supported in the asylum system and those who have been granted refugee status. The focus on ecological post‐migratory stressors and coping processes that young people identify as being integral to their well‐being and, once granted status, to how they adapt to settlement includes a selective study of some of the sources of resilience referred to in the children's talk. Recognising the interplay between individual and environment leads to a discussion of both personal attributes and collective cultural identities.     

非典与中国的电子商务

探讨了非典对于中国电子商务的影响以及电子商务在此期间发挥出的作用、存在的不足，进而提出了关于如何促进中国电子商务进一步发展的思考和建议．     

资本结构、资本成本理论与资本市场

我国国有上市公司的资本结构存在股权性融资偏好,形成的原因在于市场参考者缺乏资本成本意识,上市公司的经理们不愿承担债务违约和企业破产的风险,上市公司股东监督偏弱。全方位地发展我国多层次资本市场的有效途径是:发展多层次资本市场,尽快培育股民的资本成本意识;发展壮大企业债券市场;完善上市公司的治理结构,加速证券市场的市场化改革;让国有股逐渐流通,建立完善的资本市场机制;有步骤地发展地方性的柜台交易市场和产权市场。