基于MoCA标准的家庭网络研究

本文描述了一种基于MOCA标准的家庭网络,并对该网络及设备进行了基本性能的测试.本文首先介绍了家庭网络的发展现状,对目前的各种家庭网络标准进行了比较.在此基础上详细描述了基于MOCA标准的家庭网络,并对该网络的设计,实现、网络性能进行了详述.然后对该网络进行了测试并得出了相关的测试结论.最后指出该网络的不足及改进之处.     

浅谈电脑游戏与娱乐教育

当电脑游戏问世的时候,人们可能意识不到它所带来的社会影响。随着上个实际最后10年互联网迅速的发展,网络游戏也随之风靡全球。这带来了种种问题,广大教育工作者必须正视这些问题。而近几年来,娱乐教育的提出和发展,使教育工作者们的目光又聚焦到电脑游戏之上。电脑游戏的娱乐性如果能和教育应用结合起来,将极大地激发学习者的学习兴趣,提高学习效率和效果。电脑游戏这把双刃剑如果能被我们所掌握,将能改变其"电子海洛英"的恶名,而成为新的教学手段。     

Managing children's risk of injury in the home: Does parental teaching about home safety reduce young children's hazard interactions?

Past research confirms that parents extend much effort to teach their young children about safety, but little is known about this process. The present study examined mothers’ use of teaching as a strategy to manage young children's risk of home injury and how this impacts children's hazard interactions. Mothers of three-year-olds completed an in-home room-by-room interview in which they identified injury hazards that concern them, reported on use of teaching to manage risk of injury from these hazards, rated children's understanding of these safety issues and compliance with behavioral guidelines regarding these safety issues, and reported on children's recent interactions with these hazards. They also completed questionnaire measures of how difficult the child is to manage and the child's typical level of risk taking. Results revealed that children's understanding of safety impacted both their compliance and hazard interactions, moderating the impact of risk taking on compliance and also the impact of children's difficult-to-manage score on hazard interactions. These findings demonstrate that teaching strategies need to effectively enhance children's understanding of the safety issue in order to reduce children's risk of hazard interactions.     

对数字家庭网络新核心——家庭网关的分析

伴随互联网、物联网的发展,家庭设施呈数字化发展趋势,数字家庭概念的轮廓逐步清晰,包括家庭媒体设备间的数据分享、自动化家居的远程监控、对家庭网络门户及家庭内数据进行安全管理。随之衍生出对数字家庭网络新核心—家庭网关的需求。文章对家庭网关的形成、发展及未来可能性作了分析与预测,并结合国内外在家庭网关需求上的差异作了描述与分析。     

基于EIB的融合组网技术在智能家居中的应用

介绍智能家居系统中的常用组网技术,分析智能家居系统的实际需求,然后结合各类组网技术的适用性,提出一种以EIB为基础,同时融合IrDA和Wi-Fi技术的智能家居系统组网技术,并在上海市长宁区某街道的一个智能家居体验点中进行应用。该组网技术兼顾满足了智能家居系统高可靠性、高稳定性以及高速性的需求,具有一定的应用前景。     

宽带中国战略下一户多机的研究和实践

随着国家"宽带中国"战略的发布,高接入带宽为一户多机创造了良好的条件。同时,用户个性化需求日益强烈,家庭内手机、PAD、机顶盒、电脑多种终端使用视频服务等宽带业务将成为常态。文章分析一户多机面临的挑战,提出运营商在一户多机时代的应变之道。     

智能家庭环境中的家庭网关功能分析

随着物联网技术的快速发展,智能家庭的概念日渐成熟,越来越多的厂商开始关注这个领域,并根据各自的理解提出了很多数字家庭的概念和商业模式。文章分析了数字家庭的现状和未来发展趋势,并结合家庭网关的定位和优势提出基于家庭网关打造智能家庭的网络架构。     

基于改进智能用电优化算法的家庭智能用电管理系统

为了提升家庭智能用电管理系统的计算效能,使用时序分析算法,将远程抄表实时费控电能表采集的1s步长的电流、电压数据序列,整理成5列录波图,并利用线性重投影算法形成可供神经网络识别的时序序列,使用加权卷积多列神经网络进行挖掘,将用户每1s步长的用电量信息分解成空调、插座、照明等负荷用电量信息,最终形成家庭智能用电管理系统的数据分解展示功能。经过与针对上述负荷单独安装电能表的实测数据进行对比,发现该改进智能用电优化算法得到的用电量分解结果,与实测结果的误差率均为5.8~6.0%之间。     

Detonation Failure Characterization of Homemade Explosives

Typically characterizing home made explosives (HMEs) requires many large scale experiments, which is prohibitive given the large number of materials in use. A small scale experiment was developed to characterize HMEs such as ammonium nitrate‐fuel oil mixtures. A microwave interferometer is applied to small scale confined transient experiments, yielding time resolved characterization of a failing detonation that is initiated with an ideal explosive booster charge. Experiments were performed with ammonium nitrate and two fuel compositions (diesel fuel and mineral oil). It was observed that the failure dynamics were influenced by factors such as the chemical composition, confiner thickness, and applied shock wave strength. Thin steel walled confiners with 0.71 mm wall thickness experienced detonation failure and decoupling of the shock wave from the reaction zone. Confiners with a wall thickness of 34.9 mm showed a decrease in propagation speed and a steady reactive wave was achieved. Varying the applied shock strength by using an attenuator showed corresponding changes in the initial overdriven reactive wave velocity in the HMEs. The distance to detonation failure was also shown to depend on the attenuator length when thin wall confinement was used. This experimental method is shown to be repeatable and can be performed with little required material (about 2 g). The data obtained could be useful to model development and validation, as well as quantifying detonability of materials.     

Solar home system electrification in dispersed rural areas: a 10‐year experience in Jujuy,Argentina

This paper presents a technical approach to the electrification of dispersed rural areas with the so‐called Solar Home Systems. Lessons learned from the past show not only problems and mistakes but also interesting positive points. The electrification of remote areas, with low‐density population and low energy consumption is still a problem to solve. Sustainability is a main issue addressed in all rural electrification assessment actions, together with financing of programs and systems. This work tries to advance in the knowledge on reliability and maintenance, planning and execution, in a dispersed rural electrification market. It is based on the 10‐year field experience in the province of Jujuy, Argentina. In the most dispersed areas of the province, there are about 3000 households plus a minor number of schools, churches, health posts, and community premises electrified with small individual photovoltaic systems from a decade ago. Most remarkable outcomes from a long‐term operation and monitoring action are summarized and analyzed in the following pages. Copyright © 2011 John Wiley & Sons, Ltd.