向“协同”要效能

协同软件不仅仅是应用于企业信息化或电子政务,从中小企业信息化一直到个人市场也都会使用到协同的技术和产品,本期i博士将带你了解协同软件。     

美丽新“视”界

刚从上海飞回北京的钱经理,刚回到家中就躺在床上呼呼睡去了,旅途的劳顿让他有些疲惫。一觉醒来,已是第二天清晨。打开电脑,刚登录MSN,欧主管就来打招呼:"老兄,最近怎么样?在忙些什么?""还能忙什么啊,公司业务扩大了,给各个分支机构部署任务,忙都忙死了!还有好多地方没去呢!"钱经理一脸无奈地说。     

系统速度加快 存储性能增强 高端技术下移成为未来趋势

王老板刚到展览馆,发现欧主管早已到了。另外还有欧主管的两位好朋友——i博士和钱经理。 对于王老板的苦恼,没等欧主管给出“药方”,钱经理早就卖弄地说了出来——先建网上形象店,扩大影响;等发展到一定程度后,开通在线交易,建立立体营销体系。 “你说的方法,我早就知道了。关键是怎么做?”王老板无奈地说。“其实实现起来并不难,今天把你     

光纤通信在长葛电网中的应用与展望

本文主要介绍了ADSS,OPGW和GYTA光缆在长葛电网中的应用,重点阐述了骨干通信网的建设原则、投资估算及成效分析.     

传感器网络多密钥空间q复合密钥管理方案

无线传感器网络密钥管理研究,目前大都着眼于平面拓扑结构。但随着无线传感器网络规模日渐扩大,层次拓扑结构正成为主导。为此,提出了一种适用于分层无线传感器网络的多密钥空间q复合密钥预分配方案。通过安全连通性和节点抗捕获性分析表明该方案可在保证节点间安全连通概率的基础上,提高网络的安全阈值,提升网络的抗攻击能力,增加网络安全性。     

一种通用低压电力线载波通信模块的性能测试

介绍了开发的一种通用电力载波通信模块,并对其进行了载波信号波形及通信可靠性测试,针对误码率问题采用了CRC校验.测试结果表明,此电力载波模块性能稳定,只要能满足通信要求而又不便布线的地方均可采用.     

Thermal images generated by a line-scanning technique: statistical properties

The analysis of statistical parameters of computer-generated therfial images by a line-scanning technique indicates an approach to efficient image transmission.     

Nodes on ropes: a comprehensive data and control flow for steering ensemble simulations

Flood disasters are the most common natural risk and tremendous efforts are spent to improve their simulation and management. However, simulation-based investigation of actions that can be taken in case of flood emergencies is rarely done. This is in part due to the lack of a comprehensive framework which integrates and facilitates these efforts. In this paper, we tackle several problems which are related to steering a flood simulation. One issue is related to uncertainty. We need to account for uncertain knowledge about the environment, such as levee-breach locations. Furthermore, the steering process has to reveal how these uncertainties in the boundary conditions affect the confidence in the simulation outcome. Another important problem is that the simulation setup is often hidden in a black-box. We expose system internals and show that simulation steering can be comprehensible at the same time. This is important because the domain expert needs to be able to modify the simulation setup in order to include local knowledge and experience. In the proposed solution, users steer parameter studies through the World Lines interface to account for input uncertainties. The transport of steering information to the underlying data-flow components is handled by a novel meta-flow. The meta-flow is an extension to a standard data-flow network, comprising additional nodes and ropes to abstract parameter control. The meta-flow has a visual representation to inform the user about which control operations happen. Finally, we present the idea to use the data-flow diagram itself for visualizing steering information and simulation results. We discuss a case-study in collaboration with a domain expert who proposes different actions to protect a virtual city from imminent flooding. The key to choosing the best response strategy is the ability to compare different regions of the parameter space while retaining an understanding of what is happening inside the data-flow system.     

当代企业家和经营者必读之书──介绍春风版“热狗丛书”

当代企业家和经营者必读之书──介绍春风版“热狗丛书”杨顺美国波士顿《公司》杂志自１９７９年创刊以来，受到世界各地中小企业经营者的欢迎，他们从该杂志获得了既令人鼓舞又颇富创新意识的管理经验。春风文艺出版社最近从该杂志（也称美国因克出版公司）获得了“热狗...     

双芯同跃从伴舞迈向独舞

故事背景近来,钱经理明显地感觉到,自己肩上的担子越来越沉重了。即使是在和女朋友小蓉约会的时候,钱经理也是心事重重。终于有一天,小蓉忍无可忍,向他逼问起这其中的缘由来。原来,自从公司搬到新的大厦之后,业务量明显增加了,需要处理的事务也越来越多。公司的规模扩大了,老板自然高兴,可高兴之后,事就来了:如何处理这些海量的数据;如何让公司员工之间的沟通更为便捷;如何让公司的信息资源更有效地实现共享;如何提高员工的工作效率;如何让用户更好地了解企业的动态、企业最新的产品等等。当然了,这些事情如何解决,最终都落到了钱经理的头上。小蓉一听就乐了,“买服务器啊,这么简单的事情,我都知道”。可是,自从上次因为“多功能一体机”事件,被欧主管取笑一顿之后,钱经理可是再也不敢轻易下手了:“你不知道啊,小蓉,我也知道买服务器。可是,服务器的家族实在太庞大了,有刀片服务器、机架式服务器、塔式服务器,还有1路、2路、4路、8路服务器,1U、2U、4U服务器,还有很多,这些服务器之间有什么关系,我还没有弄明白,更何况是它们的性能特点呢。再说了,服务器之间的价格差距也非常大,我实在是拿不定主意。”这一次,钱经理可是交待实底儿了。小蓉也是头一次听说服务器还有这么多种类,更是一头雾水,就建议说:“