物联网智能家居系统的研究与设计

智能家居有广阔的应用前景.针对传统家居控制上的缺陷,采用B/S架构设计了智能家居管理系统,采用ZigBee无线网络实现对各类家居设备的信息采集和指令控制.用SQL Server 2005数据库管理系统与家庭网关,进行数据的传递与接收.通过Web浏览器,用户可以实现对智能家居系统的管理.     

智能家居的发展方向与新技术

智能家居是人们对家居生活的一种理想。随着高新技术的不断发展,各技术领域智能程度的提高,智能家居也有了新的发展方向。本文首先给出了智能家居的发展方向,接着根据这些发展方向介绍了与此相关的信息技术、通信技术和无线射频技术等等,为智能家居的发展提供了有益的参考。     

Hopen机顶盒软件平台设计与实现*

针对IBM STBX25XX机顶盒的硬件结构特点,设计了Hopen机顶盒软件平台.通过对Hopen嵌入式实时操作系统内核的移植、各功能部件驱动的定制和开发,使得Hopen机顶盒软件平台可以运行在PowerPC架构的硬件上,完成了数字电视节目的播放功能,从而拓宽了Hopen的应用领域.     

关于中国加入WTO后影视高等教育体系的构想

关于中国加入WTO以后,如何适应新的形势和面对新的竞争,从而构建新的影视高等教育体系?本文从以下三个方面进行了论述:21世纪是彩色读图时代,影视知识技术是人才所必备的三大基本知识技术之一;中国的影视教育必须构建学历教育、职业技能教育和成人继续教育相结合的国民教育体系以及四合一的教育教学模式和产学研相结合的人才培养体制及其运行机制。     

Smart pricing scheme: A multi-layered scoring rule application

Defining appropriate pricing strategy for smart environment is important and complex task at the same time. It holds the primal fraction in Demand Response (DR) program. In our work, we devise an incentive based smart dynamic pricing scheme for consumers facilitating a multi-layered scoring rule. The proposed strategy characterizes both incentive based DR and price based DR programs facilities. This mechanism is applied between consumer agents (CA) to electricity provider agent (EP) and EP to Generation Company (GENCO). Based on the Continuous Ranked Probability Score (CRPS), a hierarchical scoring system is formed among these entities, CA–EP–GENCO. As CA receives the dynamic day-ahead pricing signal from EP, it will schedule the household appliances to lower price period and report the prediction in a form of a probability distribution function to EP. EP, in similar way reports the aggregated demand prediction to GENCO. Finally, GENCO computes the base discount after running a cost-optimization problem. GENCO will reward EP with a fraction of discount based on their prediction accuracy. EP will do the same to CA based on how truthful they were reporting their intentions on device scheduling. The method is tested on real data provided by Ontario Power Company and we show that this scheme is capable to reduce energy consumption and consumers’ payment.     

一种基于高性能DSP的红外与电视视频压缩与传输硬件平台

针对红外/电视视频数字化、传输网络化的发展趋势,基于最新大规模逻辑FPGA和高性能DSP芯片,结合图像处理理论,提出红外/电视视频数字化采集、压缩与网络化传输方法,单路视频码率小于15Mbit/s,视频延时小于20 ms。该平台为后续研究基于红外/电视视频信号的目标检测、特征研究和模式识别等提供了基础,在指/火控系统等领域有着广泛应用前景。     

基于Xbee的智能窗控制系统设计

介绍了一种智能开窗系统,为了达到窗体智能监控及远程控制的目的,设计引入了多种传感器、Zigbee模块和GSM模块,用以实现室内外对智能窗体的控制。详细说明了系统的软硬件实现,并对传感器选型以及各个功能的具体实现进行了说明。此款智能窗能够很好地解决一些现实生活中的实际问题,为人们的生活提供方便。     

智能电网的安全可控性

计算机与信息技术在电力系统中的广泛应用提高了电网的自动化、智能化水平,同时也将传统IT领域的众多安全隐患引入了电网。智能电网是社会域、信息域、物理域多域交互、渗透形成的大规模新型融合网络,其安全威胁具有多域渗透、跨域攻击的特点。文中描述了智能电网基本安全需求及其与传统IT安全需求的不同;分析了智能电网中多域渗透攻击并且对信息-物理安全威胁进行分类;基于分域防护、多域协同、边界防护的思想提出了智能电网多域协同安全防护模型。     

显像管屏玻璃池炉耐火材料侵蚀机理

显像管玻璃池炉耐火材料侵蚀是引发其缺陷的主要原因之一,本文主要论述了彩色显像管屏玻璃池炉耐火材料侵蚀机理,并简要讨论了它们所形成的玻璃缺陷.     

Journaling deduplication with invalidation scheme for flash storage-based smart systems

Transaction support for filesystems has become a common feature in modern operating systems where data atomicity is achieved by writing transactions to the log region in advance. The logging mechanism is appropriate for flash storage devices due to the inherent nature of flash memory. However, the logging schemes inherently create multiple copies of data, leading to a decrease in the bandwidth of storage systems. In this paper, we present a simple and efficient invalidation scheme for multiple copies of data in a common journaling module. We identify two types of duplications, one in which there is an explicit duplication of the journal region and original region with the same data, and the other in which there is an implicit duplication of transaction commit operations. The invalidation of duplicated data reduces internal write and erase operations and garbage collection overhead for flash devices, which would otherwise increases external I/O bandwidth. Experimental results show that the overall performance improves roughly from 5% to 35% with the invalidation scheme for journal transactions.