突破时空教学 方正校园网教学平台

方正校园网教学平台将现代的教学模式和多媒体技术与网络技术、校园网和互联网有机结合在一起,方正校园网教学平台充分发挥计算机的交互性和网络的连接性,突破传统教室对时空的限制,使教师和学生能够自主地交流和沟通,为学校实现信息技术教育构筑坚实的平台。作为方正校园网整体解决方案的一部分,该方案可以起到挖掘学生的学习潜力、教师的教学潜力、教育行政机     

网络协同教学系统的研究

一.引言 随着计算机技术和通信技术的发展,计算机辅助教学正朝着多媒体网络型CAI的方向发展。通过计算机的网络功能,分布于不同地方的学生和教师可以同时坐在一“虚拟教室”中进行学习、讨论、模仿     

构建网络校园实现资源共享——农村乡镇小学校园网建设方案

为了进一步形成在校园内部、枝园与外部进行信息沟通的体系,建立满足教学、科研和管理需求的计算机应用环境,为学校的老师和学生提供充分的网络信息服务,使老师们在校园网络的环境中进行教学与科研,使老师以崭新的教学手段,全面提高教育教学水平,从而学生的素质.结合学校实际状况,特制定校园网建设方案.     

基于网络教学模式的计算机教育改革探讨

通过网络教学模式不仅可以降低教育成本,而且可以将多种资源进行整合,提高学生的学习效率,同时也便于教师对学生进行管理。本文针对计算机教育在网络教学模式下的改革进行了探讨。笔者首先简要介绍了我国计算机教育的现状和目标,以及网络教学的内容、特征、模式,然后指出了计算机教学要进行网络教学的必要性,最后对基于网络模式的计算机教育改革策略进行了探讨。     

现代教育技术CAI教学实验室的构建和应用

从现代教育技术实验室的教学任务出发,在分析面向21世纪的信息技术和教育发展趋势的基础上,对传统的教学模式存在的问题进行了分析,提出了“基于计算机网络的交互式多媒体CAI教室”的建设模型,并分析了通过此教室的功能特点能够改进传统教学模式的可行性。     

浅谈网络中控多媒体教室的设计与管理——以无锡商业职业技术学院为例

随着计算机技术、网络技术、多媒体技术和现代教育技术的不断发展和创新,多媒体教室的现代化教学进程也在不断加速.利用多媒体教室网络中控系统,能够通过现有的校园网对各多媒体教室实现集中控制,从而使每个多媒体教室变成了可远程控制维护、能够实现状态反馈,同时也降低人力成本的网络化、数字化的多功能教室.根据高校网络中控多媒体教室建...     

连邦多媒体网络教室

多媒体教室是校园网中的一个重要组成部分,代表了计算机化教育的发展方向。教育与计算机网络多媒体技术应用的完美结合形成多媒体教室,使得教师、学生轻松地教与学。 北京连邦计算机网络技术有限公司(简称连邦网络公司)正是一家致力于“将先进的技术和电脑教育新观念推向中国课堂”的专业化的公司,他们开发的“连邦多媒体网络教室”在北京景山学校     

多功能网络监控与辅助教学系统设计

计算机网络教学已经普及，现有的虚拟教室软件由于价格昂贵以及网络监控功能较弱等特点并不适合一般学校使用。针对这些问题，设计了一个基于UDP网络通信协议的多功能网络监控和辅助教学系统方案。此方案由控制台系统和工作站系统组成，在功能上兼顾网络监控和辅助教学，具备自动监控和控制计算机教学网络的功能；根据系统的特点，设计了基于UDP的控制台与工作站之间的数据通信协议。最后给出了此系统实现的主要软件流程图以及对系统的最终实现方式。     

电教的新篇章

目前,人民大学已有4个交互式教室,每个教室约有60台计算机。人大正在兴建一个多媒体的教学大楼,将有6个交互式教室。每一个有60个座位的交互式教室将投入80多万元,设备比较完善。学生可以自己学习,查资料,从网上下载老师的课件自学。常规的多媒体教室配备有一台可以上网的计算机,投影仪,录像机和DVD等。相对于交互式教室,常规多媒体教室的投入要少得多,在功能上只是缺少了交互式功能,这对于资金不是很充足的人大来说,无疑是一个比较实惠的     

e-School以教育为本

多媒体教学网产生于计算机教学,它是利用电脑技术、网络技术、信息技术和多媒体技术进行现代教学活动的网络系统,是把影视、图形、图像、声音、动画和文字等功能及控制、实时、动态地引入教学过程中的一种专用教学平台。 多媒体教学网络代表了电脑教育网络的发展方向,涵盖了电脑教室、语音教室和电化教育视听室的大部分功能,目前已成为现代化教育的一个重要工具和手段,是培养二十一世纪创新优秀人才首要和必要的教学认知工具,它的应用,将为我国教育带来教学理念和教学模式的变革。     

Modified subset sum heuristics for bin packing

We analyze the worst-case ratio of natural variations of the so-called subset sum heuristic for the bin packing problem, which proceeds by filling one bin at a time, each as much as possible. Namely, we consider the variation in which the largest remaining item is packed in the current bin, and then the remaining capacity is filled as much as possible, as well as the variation in which all items larger than half the capacity are first packed in separate bins, and then the remaining capacity is filled as much as possible. For both variants, we show a nontrivial upper bound of 13/9 on the worst-case ratio, also discussing lower bounds on this ratio.     

Intra-molecular electron communication,spectroscopic and conformational stability of the newly developed urethane modified polyetheramide coatings: Computational methods

There have been constant research efforts towards the development of new and thermally stable resins, containing properties to outdoor usage, such as high quality of adhesion, as well as resistance to water and acid, amongst others. In this computational study, the spectroscopic properties were calculated, also the intramolecular electronic communication, susceptibility, as well as conformational changes in two monomers of potential resins, namely Albiziabenth oil polyetheramide (ABOPEtA) and urethanated Albiziabenth oil polyetheramide (UABOPEtA), as well as their precursor, namely hydroxylethyl albiziabenth oil amide (HEABOA). Many of these computed properties clearly show that the urethane linkage group in UABOPEtA acts as a strong electron withdrawing group, consequently causing the rest of the molecule to be more nucleophilic. This leads to an increase in the stability of UABOPEtA, as compared the rest of the molecules, as evidenced by an increase in the intramolecular energy of interaction, as well as negative values of the polarizability exaltation index (Γ). Further UABOPEtA is also associated with higher non-linear optical properties, in terms of the hyperpolarizabilities (β) and increased aromaticity, than for molecules ABOPEtA and HEABOA. The conformational folding of molecule UABOPEtA is characterized by larger values of the bisphenol-A linkage bond angle C⋯C⋯C, contrary to the angle observed in molecule ABOPEtA. This is a direct effect of hiding the urethane unit in the cleft of the folded UABOPEtA, which clearly leads to an increase in the hydrophobicity of UABOPEtA.     

The Dimension Book

The dimension book is a novel interface in the form of a book, which can dynamically reflect various changes in the physical world's environment into the virtual world. This work functions as media in which data as well as the environment itself is treated as information.     

计划体系在ERP系统中的作用分析

该文介绍了计划体系在ERP系统中地位、作用以及计划体系在ERP系统设计实施过程中常遇缺陷对常遇问题进行了分析,并提出解决方案。阐述了计划体系在ERP的核心地位,以及MPS,MRP核心计划在整个计划体系的作用以及运作模式,最后总结了ERP实施过程中的难点提出了几点解决方案。     

The Asia-Pacific regional perspective on bioinformatics

The Asia-Pacific region spans the Asian and Australasian continents as well as the Pacific-rim countries. As such, the seeds of bioinformatics in this region have been sown as early as 1989 in India, followed by Japan and Australia in 1991. While bioinformatics research, service, and education have reached laudable heights in these countries as well as in Singapore, Taiwan, Korea, Malaysia, New Zealand and Russia, several other countries (Thailand, Indonesia, and the Philippines to name three) are making considerable progress. Following the success story of Japan, the status of bioinformatics in the Asia-Pacific region is presented.     

纸质材料在家具设计中的应用研究

纸作为生活中很常见的一种材料,在包装、造型、模型制作等方面己经发展得非常成熟,在家具设计方面作为装饰材料也有一定发展,但作为家具的主体材料在市场上还很鲜见。本文通过对纸质材料的特点及其作为家具材料的各个因素的研究,论证其在家具制作中的可行性,并说明纸作为主要材料在未来家具设计中的应用将是一种时尚趋势。这也将对人们的生活和环境保护有着重要的意义。     

汽车巡航控制系统的模糊控制与应用

本文介绍的数字式汽车巡航控制系统以ATmega16为主控单元,以模糊PID作为控制算法。详细给出了此系统的硬件设计框图、软件流程及模糊PID算法的具体设计。     

Buffer management in real-time active database systems

Real-time active database systems (RTADB) have attracted the attention of researchers in recent times. Such systems are envisioned as control systems for environments as diverse as process control, network management and automated financial trading. Sensors distributed throughout the system report the state of the system to the database. Unacceptable state reports typically results in corrective actions being triggered with deadlines. Thus RTADB's incorporate both real-time as well as active characteristics. We study buffer management in RTADB. Buffer management is recognized as not being a well studied area in real-time systems. As a result of our work, we postulate PAPER, a new buffer management scheme that relies on two strategies: prefetching and priority based buffer replacement. We report the result of studies of the performance of PAPER, as compared to that of existing buffer management algorithms. The insights derived from this paper impact both real-time database systems as well as real-time, active database systems     

Information structure in dynamic multi-person control problems

The role of Information Structure (Who knows what?) and its design (Who should know what?) in many person or decentralized optimization problems have been relatively neglected in stochastic control as well as game theory. This paper serves as an introduction which surveys work done in this area as well as some recent results in team theory and the value of information. The aim of the paper is primarily conceptual with the purpose of clarifying some basic issues in this area.     

Self-Organizing Maps for the Analysis of Complex Movement Patterns

We apply the Self-Organizing-Map-algorithm (SOM) as a central processing step in a new scheme for the characterisation of movement patterns of athletes. Due to its non-linear dimension reduction capabilities, the SOM outperforms a direct processing of the data as well as preprocessing using principal component analysis. Our results open the way to an objective assessment of movement patterns, with possible applications in the sport sciences as well as in medicine.