软测量技术及其应用

本文阐述了软测量技术的原理及应用现状,并分析了其现存的问题,同时,对这项技术未来的研究和发展趋势作了展望。     

UML建模技术在软件开发中的应用

软件工程经历了几十年的发展,总结了许多优秀的软件开发方法。针对目前软件需求的发展趋势,采用基于UML的面向对象的建模方法对应用系统的开发过程进行建模,在很大程度上加强了开发者对系统的深入理解,帮助其更好地完成系统的开发。     

基于SEM的高校图书馆员工作满意度研究

根据结构方程模型（SEM）理论,利用我国25家高校图书馆的相关调查数据,研究我国高校图书馆员工作满意度五个影响因素的相对重要性。模型分析表明,这五个因素对高校图书馆员工作满意度的影响大小依次为：薪资待遇、工作本身、图书馆组织因素、人际关系、发展前景。在这五个因素中,除“薪资待遇”因素外,其他因素皆可以在高校图书馆实际工作中进行调整,从而为高校图书馆提高工作绩效提供启示。     

谈明清家具造型及纹饰特征

明清家具在我国家具制作史上占有极其重要的地位.明清家具从制作风格、造型结构、选用材质、装饰手法、造型艺术等方面典型地体现了中国家具所具有的极其精湛的工艺价值、极高的艺术欣赏价值、丰富的历史文化价值和收藏价值.     

UML包与B结合的形式化建模研究

分析UML和B相互转化的难点后,提出一种既克服转化难点又能得到简单证明义务的建模机制:选择包作为交互替换的UML实体去说明一个B组件和包的完整类图到一个单独B组件的转化映射,同时结合实例加以说明该机制的可行性.     

面向对象数据库可视查询的设计与实现

为方便对语义丰富、结构复杂的对象数据库管理系统的操作,提高管理和开发效率,文中提出一种可根据需求自动产生结构清晰、布局合理的继承、合成及继承/合成全局结构的对象数据库模式图的算法,基于此生成的对象数对象数据库模式图可进行可视化和导航式的信息查询.实验结果表明该算法可作为对象数据库可视化查询的基础,并可推广到具有类似继承和合成等复杂结构的其他工程应用领域.     

The dose–response association between V̇O2peak and self-reported physical activity in children

ABSTRACT

Background

Previous research into the association between aerobic fitness and physical activity in children is equivocal. However, previous research has always assumed that such an association was linear. This study sought to characterize the dose–response association between physical activity and aerobic fitness and to assess whether this association is linear or curvilinear and varies by sex, age and weight status.     

Boost三电平直流变换器控制回路的研究

本文分析了Boost三电平直流变换器的工作原理,建立了数学模型,根据反馈控制理论设计出调节器的参数,最后建立了Boost三电平闭环控制系统。实验结果表明该数学模型和调节规律具有一定的合理性。     

Scaffolding Students’ Online Critiquing of Expert- and Peer-generated Molecular Models of Chemical Reactions

In this study, we developed online critiquing activities using an open-source computer learning environment. We investigated how well the activities scaffolded students to critique molecular models of chemical reactions made by scientists, peers, and a fictitious peer, and whether the activities enhanced the students' understanding of science models and chemical reactions. The activities were implemented in an eighth-grade class with 28 students in a public junior high school in southern Taiwan. The study employed mixed research methods. Data collected included pre- and post-instructional assessments, post-instructional interviews, and students' electronic written responses and oral discussions during the critiquing activities. The results indicated that these activities guided the students to produce overall quality critiques. Also, the students developed a more sophisticated understanding of chemical reactions and scientific models as a result of the intervention. Design considerations for effective model critiquing activities are discussed based on observational results, including the use of peer-generated artefacts for critiquing to promote motivation and collaboration, coupled with critiques of scientific models to enhance students' epistemological understanding of model purpose and communication.     

基于面向对象思想的学生信息管理系统的设计

本文主要介绍了面向对象的开发方法及面向对象的数据库系统的理论,并且论述了如何用面向对象的方法来开发一个具有面向对象特征的学生信息管理系统.