面向数字媒体技术专业的数字化学习平台建设

数字媒体技术专业通过数字化学习平台,为教师和学生、学生与学生、学生与教学资源间的互动提供了一种新的更有效的交互方式,也让整个教育方式更加高效。结合数字媒体技术专业特点和数字化学习平台应用优势,对数字媒体专业数字化学习平台建设进行系统阐释。     

现代科技对数码电子类产品外观设计的影响

本文通过介绍和分析现代科学技术的发展趋势,结合产品外观设计的基本目的,以及当今数码电子类产品的发展历程,旨在说明现代科技发展与产品外观设计的内在联系和对其潜在的影响,从而更好的指导产品设计。     

对设计做为生产力要素的思考

中国在改革开放以后,由"科技生产力"带领"中国制造"走向了世界。如今,在后工业时代背景下,对传统生产力重新反思并提出"设计生产力"的构思愈来愈显重要。笔者对设计作为生产力要素的多重属性和运行机制进行探索,并对设计生产力的社会意义进行归纳。     

多源信息融合能力评估关键技术综述

为了对多源信息融合技术在海战场作战指挥方面发挥的作用进行定量描述,文章在多年信息融合测试评估研究的基础上,对海战场多源信息融合所涉及的能力指标计算、归一化及综合、测试评估系统设计、测试想定设计、适合信息融合的信息源模拟器建设等涉及的关键技术进行了描述,并给出了一个实际的评估例子。     

开关磁阻电动机调速系统的应用研究

文章介绍了适用于工业运输设备的开关磁阻电动机调速系统,由于其具有起动电流小,起动转矩大,运行效率高的特点,因此能够解决工业运输设备中重载不能起动和能耗较大的实际问题,并提出了设计方案,说明了运行过程,指出了该系统的优点。     

基于PCI Express的闪存存储系统设计

通过采用PCI Express接口,应用并行和流水线技术,提高存储系统的读写速率。设计闪存映射层算法,在不降低系统读写性能的基础上易于管理数据。该方案在Virtex 5 FPGA上实现,并对其性能进行测试,结果表明,数据连续写速率达到400 MB/s,读速率达到500 MB/s,能满足高端应用的需求。     

WSN中基于分簇的实时传输算法

采用跨层技术,提出一种无线传感器网络(WSN)中基于分簇的实时传输算法。在WSN中找出簇头到基站的多条优化路径,采用基于平均队列长度的拥塞控制方法,在这些路径中找出一条耗能最小且实时性最优的路径,并沿着该路径将数据传送到基站。仿真分析表明,该算法能满足网络的实时性需求,并能有效进行拥塞控制。     

用于成品率分析芯片的LVS方法

研究成品率分析芯片的特点和设计流程,提出适用的LVS方法。该方法结合传统的LVS及形式验证,能够解决成品率分析芯片中违反设计规则、版图和电路图不匹配等特殊结构的验证问题。将该方法与传统验证流程相融合,用于成品率分析芯片的设计和验证。实验结果证明,成品率分析芯片验证流程具有正确性和稳定性。     

Internet use, videogame playing and cell phone use as predictors of children’s body mass index (BMI), body weight, academic performance, and social and overall self-esteem

In this research we examined the prediction of children’s body mass index (BMI), body weight, academic performance, social self-esteem and overall self-esteem from their IT (information technology) use, specifically, their Internet use, cell phone use and videogame playing, after controlling for the effects of gender, race, age and household income on these measures. Participants were 482 children whose average age was 12 years old. One-third was African American and two-thirds were Caucasian American. Results indicated that IT use did not predict BMI or body weight, contrary to one previous survey and the widespread belief that screen time is responsible for the obesity epidemic among our nation’s children. Instead, BMI and body weight were higher for African Americans, older children and children from lower income households. The sole and strong positive predictor of visual-spatial skills was videogame playing, which also predicted lower grade point averages (GPAs). Gender and Internet use predicted standardized test scores in reading skills. Females and children who used the Internet more had better reading skills than did males and children who used the Internet less, respectively. Implications of these findings for future research on the benefits and liabilities of IT use are discussed.     

Providing effective feedback, monitoring and evaluation to on-line collaborative learning discussions

Learning and knowledge building have become critical competences for people in the knowledge society era. In this paper, we propose a sociolinguistic dialogue model for understanding how learning evolves and how cognitive process is constructed in on-line discussions. The knowledge extracted from this model is used to assess participation behavior, knowledge building and performance. The ultimate purpose is to provide effective feedback, evaluation and monitoring to the discussion process. Seven hundred students from the Open University of Catalonia in Spain participated in this study. Results showed that learning and knowledge building may be greatly enhanced by presenting selected knowledge to learners as for their particular skills exhibited during interaction. In addition, this valuable provision of information is used as a meta cognitive tool for tutors and moderators for monitoring and evaluating the discussion process more conveniently. This contribution presents our conceptual model for interaction management as well as key design guidelines and evaluation results. Implications of this study are remarked and further research directions are proposed.