多媒体数据库系统在 Internet 上的实现

介绍多媒体数据库和Ｉｎｔｅｒｎｅｔ,提出一种如何将多媒体数据库管理信息系统与Ｉｎｔｅｒｎｅｔ结合在一起的有效方法,着重讨论了Ｉｎｔｅｒｎｅｔ上多媒体数据库管理信息系统的实现．     

分离工程课堂教学中多媒体应用之我见

本文简述了多媒体在本科生课堂教学中的作用及存在的问题,结合分离工程课的特点和本校分离工程教学团队的教学经验,以及笔者在德国高校的教学观摩体会,从板书篇幅设计、课件内容选择、教学节奏控制和屏幕位置设置等方面提出了四点建议。     

粉体工程多媒体课件的教学设计与实践探讨

粉体工程是一门包涵粉体材料理论及粉体工程应用实践的、跨学科的专业课程。多媒体课件运用于教学中,可创设多元化演示情境,提高教学质量,调动学生的学习积极性。应用多媒体需避免对课件的过度依赖。多媒体课件的研制和应用,要注重艺术性与创新性,充分发挥自身的优势,提高教学效果。     

化学工艺学教学辅助手段——多媒体课件的开发

笔者运用计算机技术结合Authorware7.0、Adobe Photoshop 7.0、Flash 5.0等软件,开发出可以辅助化学工艺学课程教学的多媒体课件。课件分为课堂授课课件、工艺流程动画、网络课程交流平台和试题测试平台四个模块。各模块相互独立,又相互支持,内容完整、科学,具有表现形式灵活、界面友好、易维护、易操作、开放性强等特点。课件演示与课堂讲授内容互为补充,相辅相成。     

具有多媒体和网络教学功能的数控仿真软件的设计

根据数控教学工作的实际情况和具体功能要求,基于Windows XP操作系统,以Visual Basic 6.0为工具,开发了一个具有多媒体和网络教学功能的数控仿真多媒体教学软件,打破了传统的教学模式,将理论教学与实训操作结合得更加紧密。教学实践表明:利用该软件,教学效果明显优于一般仿真软件。     

基于互联网的液压元件理论与实验同步教学系统设计

设计、实现一个基于互联网的,较为复杂、庞大的液压元件理论教学与实验系统。该系统可使学校本部和新校区,乃至全国各高校的液压元件课程的理论教学与实验系统有机结合,改变了传统的教学和实验模式,开启了全新的液压元件课程理论教学和实验模式。在网络信号覆盖的任何地方,通过实验台的排队申请管理系统,教师、学生都可实现现场及远程的可视化理论教学、实验和学习。实验台可以通过计算机伺服控制系统和手动两种方式调节,进行多种液压元件的性能教学实验。     

A robust software watermarking for copyright protection

This paper advocates protecting software copyright through hiding watermarks in various data structures used by the code, e.g., B+-trees, R-trees, linked lists, etc. Prior proposals hide the watermarks in dummy data structures, e.g., linked lists and graphs that are created, solely for this reason, during the execution of the hosting software. This makes them vulnerable to subtractive attacks, because the attacker can remove the dummy data structures without altering the functionality or the semantic of the software program. We argue that hiding watermarks in one or more data structures that are used by the program would make the watermark more robust because disturbing the watermark would affect the semantic and the functionality of the underlying software. The challenge is that the insertion of the watermark should have a minimal effect on the operations and performance of the data structure.This paper proposes a novel method for watermarking R-tree data structure and its variants. The proposed watermarking technique does not change the values of the stored data objects. It takes advantage of the redundancy in the order of entries inside the R-tree nodes. Entries are arranged relative to a “secret” initial order, known only to the software owner, using a technique based on a numbering system that uses variable radix with factorial base. The addition of the watermark in the R-tree data structure does not affect the performance nor does it increase the size of the R-tree. The paper provides a detailed security analysis and performance evaluation to show that the embedded watermarks are robust and can withstand various types of attacks.     

‘Pretty Lights’ and Maths! Increasing student engagement and enhancing learning through the use of electronic voting systems

University classes in Mathematics are traditionally perceived to be uninspiring and devoid of active student–lecturer communication. Large undergraduate classes further compound the difficulty of engaging students and enabling viable student–lecturer feedback. At the Mathematics Education Centre, Loughborough University, some staff members have been using electronic voting systems (EVS) to enliven the classroom and enable large numbers of students to respond to questions in real time during class. In this paper, we present an evaluation case study, based on student perceptions, of the impact of EVS use on student learning and engagement. The results show that majority of students are hugely positive about the usefulness and overall advantageousness of EVS use in classes. Results also show that EVS use does increase the likelihood of students participating and engaging in class, as even students who do not view EVS as being particularly useful stated that they are more likely to participate in classes where EVS are used than otherwise. However, there seems to be no correlation between EVS use and improvement (or otherwise) in student grades.     

CATV以太网组网方案

当前的有线电视(CATV)网有能力提供宽带信息多媒体服务,计算机网络有能力处理各种数据流向,两者的结合是实现宽带结合局域网络的便利途径。本文提出了一种实现上述目标的方案。     

SoC架构设计中的适应性扩展方法研究

为了应对SoC研发的机遇、困难和高昂花费,寻求对目标应用领域的最佳支持与广泛适用性之间的恰当平衡已成为目前电子系统设计的中心课题。通过一个从基于3G终端到网络多媒体播放器应用的架构扩展实例,重点论述了对SoC架构设计中适应性扩展方法的研究;另外,提出了一种基于IP的多处理器共享及层次结构存储体系,用以应对高密度的计算及传输任务需求;并通过系统级设计工具CoCentric,建立软硬件协同仿真平台,验证了本实例的扩展思路。