交-交电流型无换向器电机调速系统的仿真

本文对交-交电流型无换向器电机调速系统进行了深入的研究,建立了可控硅导通与截止的数学描述方法,推导出系统可能的运行状态,建立了系统数值仿真程序,此程序适用于对系统的稳态和暂态电流的分析,并得到了实验的验证,为分析交-交电流型无换向器电机调速系统提供了一个有力的工具。     

Considerations in Assessment of Children with Severe Disabilities including Deaf‐Blindness and Autism

This paper will discuss the difficulties in assessment of autistic and deaf‐blind children with such severe difficulties in communication that they are often labelled as untestable and subsequently misdiagnosed as severely to profoundly mentally retarded. It will go on to make the case for nonintrusive assessment and appropriate intervention as the most relevant procedures for helping this population advance educationally and in life skills. While this paper will focus on children, the points made apply to individuals of all ages.     

Portfolio Assessment as National Policy: the National Council for Vocational Qualifications and its quest for a pedagogical revolution

The National Council for Vocational Qualifications established assessment procedures for qualifications in England, Wales and Northern Ireland in which portfolios play a central role. The relevant qualifications (National Vocational Qualifications and General National Vocational Qualifications) have been taken by large numbers of young people in upper secondary schooling, and young people and adults in work or in government training schemes; and are intended to have labour market currency and to provide routes into further and higher education. The use of portfolios derives from a commitment to direct and comprehensive assessment of the whole ‘syllabus’, but also from a belief in certain pedagogical approaches and in enhancing students' independence and initiative. There is evidence that the approach has affected learning styles, but major problems have arisen relating to the manageability of the approach and the reliability of assessor judgements.     

牛磺酸与运动能力

采用文献综述的研究方法，论述了牛磺酸广泛的生物学作用，尤其是抑制自由基生成，促进自由基消除，抗疲劳和抗运动性员伤方面，说明牛磺酸是一种安全、有效的运动营养补剂。     

从终身体育思想审视我国学校体育的改革与发展

终身体育思想对学校体育领域的改革产生了积极而深刻的影响，学校体育如何为终身体育打基础，怎样从终身体育思想提出我国学校体育改革与发展的创新性对策，是学校体育领域前瞻性和实用性都很强的一个课题，具有重要的理论与学术价值。以大、中、小学体育理论、实践与终身体育为研究对象，侧重论证终身体育思想下我国学校体育改革与发展的对策。     

湖南省高校体育产业的现状及对策研究

运用调查访问法、文献资料法、逻辑分析法和数理统计法对湖南省高校体育产业的现状进行了调研,分析了其模式、类型、效益等诸多因素,探讨了在市场经济体制下的发展对策.     

Learning with Web Tools, Simulations, and Other Technologies in Science Classrooms

This position paper proposes the enhancement of teacher and student learning in science classrooms by tapping the enormous potential of information communication and technologies (ICTs) as cognitive tools for engaging students in scientific inquiry. This paper serves to challenge teacher-held assumptions about students learning science ‘from technology’ with a framework and examples of students learning science ‘with technology’. Whereas a high percentage of students are finding their way in using ICTs outside of school, for the most part they currently are not doing so inside of school in ways that they find meaningful and relevant to their lives. Instead, the pedagogical approaches that are most often experienced are out-of-step with how students use ICTs outside of schools and are not supportive of learning framed by constructivism. Here we describe a theoretical and pedagogical foundation for better connecting the two worlds of students’ lives: life in school and life outside of school. This position paper is in response to the changing landscape of students’ lives. The position is transformative in nature because it proposes the use of cyber-enabled resources for cultivating and leveraging students new literacy skills by learning ‘with technology’ to enhance science learning.     

学习系统的形式化建模研究现状与评析

学习系统的形式化建模目前主要有两种思路:从学习资源的角度建模和结合过程、资源的学习系统建模,对于前者该文介绍了一些国际/国内组织或机构关于学习对象元数据标准的研究成果;对于后者该文重点介绍了ITT(Instruction Transaction Theory)、教育建模语言和IMS学习设计规范的研究思想,对于有关的研究成果该文都做了相应的评述。