音视频传输系统中的网络融合

基于音视频系统对IT技术的需求,分析在进行AV传输系统设计中,重点考虑网络拓扑结构、服务质量管理、PTP时钟三个问题。     

高职思政理论课视频教学的作用

在高职思想政治理论课中适当运用视频资料,对革新教学手段、激发学生学习积极性有着良好的作用。探讨了如何科学地运用视频资料提高思想政治理论课的教学效果。     

小波与视频图像压缩技术探讨

小波基的时频局部化特性和小渡变换的多尺度展开结构使得基于小波的图像／视频压缩编码不仅具有良好的率失真特性,而且更容易实现压缩码流的全伸缩特性,基于小波的图像／视频压缩编码在未来将会显示出技术优越性。小波图像压缩新技术的研究,目前和未来很长一段时间仍将是图像和视频压缩应用研究的热点。     

网络视频在高职英语视听说教学中的应用

随着网络多媒体技术在教学上的广泛应用,高职院校相继开展了英语视听说教学。网络视频来源便利,教师可本着一定的设计原则,根据教学的实际需要,适当地使用网络视频,为学生设计不同的练习。实践证明,利用英语网络视频进行视听说教学是可行的、有效的。     

YouTube: Educational Potentials and Pitfalls

No abstract available for this article.     

基于OPC服务器和网站应用程序的可编程逻辑控制器

各大主流PLC厂家的上位机组态软件都支持建立OPC服务器。用微软公司的Visual C#编写一个Web应用程序作为PLC的监控画面,建立此Web应用程序与OPC服务器的通讯,并把它在Internet上发布。基于Web应用程序的优点,可以使用电脑、手机等任意浏览器(无须安装控件)通过Internet像访问普通网页一样访问画面来监控PLC。     

A retrospective look at replacing face‐to‐face embryology instruction with online lectures in a human anatomy course

Embryology is integrated into the Clinically Oriented Anatomy course at the Texas Tech University Health Sciences Center School of Medicine. Before 2008, the same instructor presented embryology in 13 face‐to‐face lectures distributed by organ systems throughout the course. For the 2008 and 2009 offerings of the course, a hybrid embryology instruction model with four face‐to‐face classes that supplemented online recorded lectures was used. One instructor delivered the lectures face‐to‐face in 2007 and by online videos in 2008–2009, while a second instructor provided the supplemental face‐to‐face classes in 2008–2009. The same embryology learning objectives and selected examination questions were used for each of the three years. This allowed direct comparison of learning outcomes, as measured by examination performance, for students receiving only face‐to‐face embryology instruction versus the hybrid approach. Comparison of the face‐to‐face lectures to the hybrid approach showed no difference in overall class performance on embryology questions that were used all three years. Moreover, there was no differential effect of the delivery method on the examination scores for bottom quartile students. Students completed an end‐of‐course survey to assess their opinions. They rated the two forms of delivery similarly on a six‐point Likert scale and reported that face‐to‐face lectures have the advantage of allowing them to interact with the instructor, whereas online lectures could be paused, replayed, and viewed at any time. These experiences suggest the need for well‐designed prospective studies to determine whether online lectures can be used to enhance the efficacy of embryology instruction. Anat Sci Educ 7: 234–241. © 2013 American Association of Anatomists.     

Watching MOOCs together: investigating co-located MOOC study groups

Research suggests that massive open online course (MOOC) students prefer to study in groups, and that social facilitation within the study groups may render the learning of difficult concepts a pleasing experience. We report on a longitudinal study that investigates how co-located study groups watch and study MOOC videos together. The study was conducted with on-campus flipped classroom students. Our subjects reported an overall high satisfaction with the study group style. The research reveals that students like to stay synchronized in the group while watching MOOC videos. However, they have to find a balance between synchronization, video interaction, and the amount of conversation. Watching MOOCs on a shared display addresses the need of synchronicity, and the distribution of control can increase the video interactivities.     

自适应随机测试在视频编码领域中的应用

随着视频编码技术的发展,视频输入参数的维度在不断的增加,使得视频编码软件变的测试面临很大的挑战。对于多维输入的软件测试,测试的效率是一个重要的衡量指标。基于自适应随机测试(ART)在多维测试领域的优点。本文分析了视频编码测试遇到的问题,并通过算法的比较分析,最后给出了自适应随机算法IDI-FSCSART在视频编码测试中的应用。     

中关村高端创意产业核心技术需求与策略

本文调查研究了北京中关村软件业、动漫业、数字出版业和数字影音业等高端创意产业的核心技术研发和应用现状,分析了其技术创新能力。通过对比研究英、美、日等发达国家在该行业的前沿技术进展,研判中关村的行业核心技术在国内外的地位,认为中关村高端创意产业的核心技术尽管国内竞争优势明显,但与国际顶尖技术水平相比还存在较大的差距。文章最后总结了中关村现阶段技术需求重点,提出缩短技术差距的对策措施。