无线传感网络中的分簇算法综述

近年来无线传感网络的研究和应用取得了长足进展,其应用领域涵盖抢险救灾、战场侦察、资源保护、安全监控和智能家居等.为了改善传感网络的性能和提高可扩展性,节点往往按照分簇结构进行组织.本文介绍了分簇算法产生的背景和作用,说明了分簇算法需要考虑的因素、分簇目标、特性和复杂性.然后,基于收敛速率、簇结构稳定性和节能意识等方面概...     

电子病历的现状与难点分析

探讨电子病历的发展现状及难点问题。查阅相关文献,比较分析电子病历的国内外现状,总结其实施过程中的难点问题。电子病历的法律、技术、管理方面的难点问题有待进一步解决。电子病历的实施是一个复杂的系统工程,需要各个方面的努力。     

BT类型P2P网络的位置知晓性数学建模研究

提出一个新的P2P网络研究问题,即BitTorrent类型对等网络(采用了相似的多源文件传输机制的P2P网络)的位置知晓性问题.设计了BT类型网络使用的具有理想位置知晓性的多源文件传输机制,进行了数学建模,分析证明了该机制具有良好的位置知晓性、下载性能、网络公平性和扩展性.     

面向业务的安全管理模型研究

文章结合目前各种网络业务系统对安全管理的迫切需求,设计了面向业务的安全管理模型,分析了模型中涉及的安全事件关联分析技术和安全态势感知技术等关键技术,并就安全管理的发展趋势进行了探讨.     

2010年我国恶意代码新特点的研究

文章以公安部2010年计算机病毒疫情调查活动的数据作为基础,以国家计算机病毒应急处理中心国家级恶意代码样本库作为支撑,结合信息网络安全通报机制成员单位汇总的情况和各反病毒研究机构发布的安全报告,阐述了2010年我国恶意代码发展的总体情况,分析了2010年我国恶意代码出现的新特点,探索了今后恶意代码的发展趋势并提出对策建议。     

留白之美——版式设计中空白的运用

所谓版式设计是指在有限的版面空间里,将版面的构成要素——点、线、面,根据特定内容的需要进行组合排列,并运用造型要素以及形式原理,把构思与计划以视觉形式表达出来,寻求艺术手段来正确地表现版面的信息。在版式设计中一般设计师都会把重点放在黑的设计上,却容易忽视白的设计。文章以版式设计教学为例,阐述版式设计中白的作用及其地位,并探讨版式设计中如何恰当使用空白。     

Knowledge and information awareness for initiating transactive memory system processes of computer-supported collaborating ad hoc groups

This paper presents an innovative approach for initiating processes of a transactive memory system in newly formed groups of experts collaborating computer-supported in a complex problem-solving task. Our empirical study compared 15 experimental and 15 control groups, each consisting of triads. In the experimental condition, the triads were provided with a tool for fostering knowledge and information awareness, that is, being informed about the knowledge and the underlying information of the collaboration partners in form of digital concept maps. In the control condition, the groups had no access to this tool. Results confirmed the potential of the tool to initiate processes of a transactive memory system: shared agreement of the knowledge of the other group members’ knowledge proved to influence group performance positively. In addition, previous findings of the tool’s potential to establish knowledge and information awareness and to augment group performance could be replicated. However, the postulated mediating effect of processes of a transactive memory system concerning the impact of knowledge and information awareness on group performance did not reach statistical significance. Aspects for future studies and implications of these findings regarding their practical implementation, for example, in teams of organizations, are discussed.     

Comparative study of three training methods for enhancing process control performance: Emphasis shift training,situation awareness training,and drill and practice

Three training methods to improve attention management skills in process control were compared. Forty students from technical disciplines participated in a five-hour module of emphasis shift training (EST), EST combined with situation awareness training (EST/SA), and drill and practice (D&P) on a simulated process control task. Participants were then tested three times for 45 min each (immediately after training, two weeks after training, and six weeks after training) for system control performance and diagnostic performance on familiar and nonfamiliar fault states. D&P led to superior diagnostic performance on familiar system faults. EST/SA training supported the diagnosis of novel system faults. EST was less effective than expected for system control performance. Implications for training design in process control are discussed.     

建立大网概念在计算机网络教学和人才培养中的作用

针对通信技术发展对高等教育计算机网络课程教学提出的新要求,以及高校计算机网络课程教学中存在的问题,文章从当前社会经济发展所需的可雇用服务型网络人才培养需求出发,探讨建立大网概念在计算机网络教学和人才培养中具有的重要作用,提出在计算机网络教学中建立大网概念的关键在于深入浅出地把握逻辑网络和物理网络之间的关系,实现理论网络与实际网络的统一。