基于Web的教师教学质量多元评价系统设计与实现

基于高职教育的职业性、教育性构建了基于Web的具有高职特性的教师教学质量评价系统。该系统具有较高的实践应用价值和推广价值,该系统的推广应用对改善教风、学风起到了积极的推动作用。     

信号的滤波技术发展历程

详细介绍了滤波技术的历史、发展和应用状况,对几种新型滤波器技术进行了讨论,提供了它们的研究课题。对国内外滤波器现状进行了分析,展望了滤波器技术的未来。     

泛在学习——学习者自由探索的新方式

泛在学习代表了一种新的学习服务理念,使学习无处不在。泛在学习的学习理论从外在环境刺激向内在潜能的激发转变,注重学习者的个性发展和学习共同体的作用。文章介绍了目前普遍关注的泛在学习的内涵,支撑泛在学习的技术和理念,以及自由探索的形式;分析研究了泛在学习未来的发展前景。     

中文分词技术在搜索引擎中的应用

本文介绍了搜索引擎的关键技术——中文分词技术,对中文分词技术的概念、常用算法以及分词的难点进行了详细介绍,让读者对中文分词的现状有所了解。     

信息时代下的隐私如何保护

随着电子商务技术的发展,网络交易安全成为了电子商务发展的核心和关键问题,对网络隐私数据(网络隐私权)安全的有效保护,成为电子商务顺利发展的重要市场环境条件。网络信息安全技术、信息安全协议、P2P技术成为网络隐私安全保护的有效手段。     

基于三维虚拟样机技术大型林业装备设计与研究

针对我国林业机械研制的落后现状,以国家科技支撑项目为例,以SolidWorks软件为平台设计我国首台林木联合采伐机底盘,论述了采用现代三维虚拟技术进行大型林业装备设计的开发过程,重点说明了采用这一技术加快我国林业装备研制步伐,提高了林业机械产品的设计效率,增强了企业市场竞争力的重要现实意义。     

总线LVDS驱动器电路设计

提出了一种用于多点数据传输的BLVDS(Bus low voltage differential signal)驱动器电路设计。设计中将电压模式驱动器电路和双电流源模式驱动器电路相结合实现多点数据传输,既充分利用了LVDS技术高速、低功耗和低噪声的优点,又解决了传统的LVDS驱动器电路只能用于点对点应用,不能用于总线数据传输的问题。仿真结果表明,该BLVDS驱动器电路的传输速率可达100Mbps,电气性能指标符合TIA/EIA-899协议标准的要求。     

Identifying discriminating variables between teachers who fully integrate computers and teachers with limited integration

Given the prevalence of computers in education today, it is critical to understand teachers’ perspectives regarding computer integration in their classrooms. The current study surveyed a random sample of a heterogeneous group of 185 elementary and 204 secondary teachers in order to provide a comprehensive summary of teacher characteristics and variables that best discriminate between teachers who integrate computers and those who do not. Discriminant Function Analysis indicated seven variables for elementary teachers and six for secondary teachers (accounting for 74% and 68% of the variance, respectively) that discriminated between high and low integrators. Variables included positive teaching experiences with computers; teacher’s comfort with computers; beliefs supporting the use of computers as an instructional tool; training; motivation; support; and teaching efficacy. Implications for support of computer integration in the classroom are discussed.     

Educational affordances of PDAs: A study of a teacher’s exploration of this technology

This paper reports on a case study of a teacher from a technical education institution who explored the educational affordances of PDA technology over a period of six months. Based on this teacher’s perspectives, the study was designed to inform our own understanding of educational affordances of this new and emerging technology. Understanding of educational affordances is important in the context of planning a suitable intervention to support pedagogically effective integration of PDA technology. The study explicated a set of five affordances of PDA technology: as a multimedia-access tool, connectivity tool, capture tool, representational tool and analytical tool. We call on further research to expand this set into a more comprehensive collage of educational affordances of PDA technology.     

A methodology to incorporate product mix variations in cellular manufacturing

The identification of part families and machine groups that form the cells is a major step in the development of a cellular manufacturing system and, consequently, a large number of concepts, theories and algorithms have been proposed. One common assumption for most of these cell formation algorithms is that the product mix remains stable over a period of time. In today’s world, the market demand is being shaped by consumers resulting in a highly volatile market. This has given rise to a new class of products characterized by low volume and high variety. To incorporate product mix changes into an existing cellular manufacturing system many important issues have to be tackled. In this paper, a methodology to incorporate new parts and machines into an existing cellular manufacturing system has been presented. The objective is to fit the new parts and machines into an existing cellular manufacturing system thereby increasing machine utilization and reducing investment in new equipment.