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带阈值的脉冲神经膜系统是一类生物启发式计算模型,提出该系统的灵感来自神经元电位变化与其活动的联系。对于带阈值的脉冲神经膜系统的计算能力研究,人们已证明该系统在极大同步工作模式下,作为产生数或接受数的计算设备时,是与图灵机等价(计算通用)的,而该系统在其他工作模式下的计算能力如何也是人们普遍关心的问题。文中研究的是带阈值脉冲神经膜系统在全局异步局部同步模式下产生数的能力,证明了突触带整数权重的相应系统是计算通用的,而突触带正整数权重的相应系统只能产生半线性数集。研究结果表明,突触权重的取值范围影响着全局异步局部同步工作模式下带阈值脉冲神经膜系统的计算能力。 相似文献
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元计算系统主要用于高性能的计算,实现广域异构网络资源共享,这些资源十分丰富,包括计算机、数据库和昂贵仪器等,随着计算机网络的发展与成熟,元计算正成为网络计算方面的新的研究热点,在国外,元计算的研究已经有相当的基础,提出了概念设计,并开发了一些实验性系统,文章对元计算的研究情况进行了综述,论述了不同元计算系统的设计特点和存在的问题,提出了在国内进行元计算研究应该解决的几个关键问题。 相似文献
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如今,分期付款的销售方式越来越普遍.如果有一个能够自动计算首付、月按揭的查询系统就好了.下面笔者就以一个分期付款购买汽车的自动查询系统(如图1)为例,给大家介绍一下设计过程。 相似文献
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基于代理的网格计算中间件 总被引:11,自引:0,他引:11
WADE系统是基于代理技术实现的一个可屏蔽异构和分布性的动态自适应的校园计算网格,提出了基于代理技术在校园网络内实现并行计算的方法,详细论述了基于代理的网格计算中间件的体系结构和主要模块功能,阐述了利用代理实现异构编译、协同计算的过程,给出了代理的Java实现方法,利用软件代理实现网格计算中间件,可以解决异构计算平台下多种并行编程环境的协同计算问题,为用户提供统一的服务接口,这将大大增强系统的可用性。 相似文献
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文中提出一个基于服务的网格计算模型,该模型强调了一个网格就是一个特殊的计算系统。通过这个模型与传统计算系统模型的比较,分析了它们的相似点和不同点,这对于网格的研究是很重要的。文中所提出的模型对网格计算的研究也是非常有用的。它不仅为开发一个网格系统提供了一定的帮助,而且为网格理论上的研究提供了一个框架。 相似文献
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用于并行计算的PC机群 总被引:4,自引:0,他引:4
随着计算机技术的高速发展,使用机群进行并行计算也越来越流行,尤其是利用工作站机群进行并行计算已经十分普遍。但使用PC机群进行并行计算的系统还很少,这种PC机群由一组PC机(486,586)通过网络互连组成。本文介绍现有的几个PC机群和我们研制的一个PC机群计算环境 相似文献
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虽然Peer-to-Peer结构的可扩展性已经成为普遍的共识,但如何简单、有效地构造具有良好特性的P2P计算网络仍然是一个开放问题。本文提出了一个自组织的Peer-to-Peer重叠计算网络的构造方法以及基于该网络的计算任务调度算法。仿真结果说明,本文构造的计算网络表现出明显的自组织特性,具有较好的可扩展性和自组织能力,能较好地为计算资源的调度提供支持。 相似文献
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普适计算与虚拟现实技术的融合是今天普适计算的一个新领域,是对虚拟空间计算力的提升,更是普适计算中"普适"的体现。本文讨论并给出了基于虚拟现实技术的互动普适计算的概念、特性和关键技术,为其实现提供理论探索和论证。 相似文献
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Toward pervasive computing 总被引:1,自引:0,他引:1
Summary form only given. The fundamental principles that guide pervasive computing environment design evolved with distributed systems: local area networks, middleware, wide-area networks, the WWW. Over the years, ever smaller, portable computers came on the market and wireless networking technology evolved, leading to the emergence of mobile and wireless computing. Embedded computing gave us small devices, sensors and actuators, increasingly with communications capability. There are now substantial projects that demonstrate that sensor-rich environments, such as active buildings and cities, are feasible and will be deployed widely in the real world in the near future. This issue of Pervasive Computing describes several such projects. 相似文献
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《Pervasive Computing, IEEE》2007,6(4):i1-i10
IEEE Pervasive Computing's 2007 annual index includes a complete author index and a list of all articles and departments published this year. The PDF file is free, and all titles link to their Computer Society Digital Library abstracts. Pervasive Computing subscribers can also access the HTML file, which includes internal links for coauthors. 相似文献
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Bonto-Kane Maria Vicente A. Chin Alvin Mc Carthy Sheila Srikulwong Mayuree Timmins Paul J. 《Pervasive Computing, IEEE》2007,6(4)
Pervasive computing is as much about the user as it is about the technology. So, the Fifth International Conference on Pervasive Computing emphasized desirability rather than just feasibility. Featured themes included user benefits, human-computer interaction, group and social interactions, context awareness, finding and positioning people and objects, and personal privacy. 相似文献
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Paraskevas Evripidou George Samaras 《International journal of parallel programming》2006,34(5):429-458
In this paper we present Parallel Computing with Mobile Agents (PaCMAn), a mobile agent based Metacomputer that enables its
users to utilize idle resources on the internet to tackle computational problems that could not be handled efficiently with
their own resources. The PaCMAn launches multiple mobile agents that cooperate and communicate to solve problems in parallel.
Each agent supports the basic communication and synchronization tasks of the classical parallel worker assuming the role of
a process in a parallel processing application. Application tasks, however, are assigned dynamically to the PaCMAn’s mobile
agents via TaskHandlers. TaskHandlers are Java objects capable of implementing particular tasks of the application. The PaCMAn
consists of three major components: Broker, Server and Client. A server machine has to be explicitly registered in order to
take part in the PaCMAn Metacomputer. A number of brokers keep track of the available resources. In the PaCMAn system both
server and client machines can be located anywhere in the Internet. The clients select the servers that they will utilize
based on the specific resource requirements. We have developed and tested prototype systems with several applications. These
prototypes provide proof of concept of our proposed Metacomputing philosophy. Furthermore they have demonstrated that PaCMAn
provides parallel efficiency. We also demonstrate that the PaCMAn Metacomputer can be used as the computational engine for
the creation of sophisticated Pervasive Services anywhere anytime. 相似文献
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曾利军 《网络安全技术与应用》2005,(7):56-58
随着嵌入式系统在各种电子设备中的广泛应用,计算机技术的发展将进入一个普适计算(PervasiveComputing)阶段。随之而来的各种电子设备联网成为必然趋势。与人类生活息息相关的各种家电设备能够联成网络并接入互联网,人们可以在任何时间、任何地点统一控制各种家电协同工作,将极大地改变和影响人们的生活。本文探讨了这种普适计算机制的实现。 相似文献
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Krumm John Anderson Ken Lea Rodger Blackstock Michael Spasojevic Mirjana Ito Mizuko Van House Nancy Koskinen Ilpo Kato Fumitoshi Back Maribeth Inagaki Masatomi Horikiri Kazunori Lahlou Saadi Ballagas Rafael Huang Jeffrey Lertsithichai Surapong Elliott Ame Mainwaring Scott D. Woodruff Allison Sengers Phoebe Riisgaard Hansen Thomas Bardram Jakob E. Korhonen Ilkka 《Pervasive Computing, IEEE》2007,6(2):109-112
This article presents summaries of five of the UbiComp 2006 Workshops: System Support for Ubiquitous Computing, Pervasive Image Capture and Sharing, Usable Ubiquitous Computing in Next-Generation Conference Rooms, Nurturing Technologies in the Domestic Environment, and UbiHealth. The other summaries appeared in the January--March 2007 issue. 相似文献
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近年来普适计算得到了快速的发展,在2003年国际普适计算会议后,普适计算开始向机器学习的方向发展即普适机器学习。经过普适机器学习模型设计和普适机器学习分类器设计研究后,本文在实例Smart—It中应用agent普适机器学习分类器,通过分析使用前后的数据,对比其优缺点。 相似文献
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近年来普适计算得到了快速的发展,在2003年国际普适计算会议后,普适计算开始向机器学习的方向发展即普适机器学习。经过普适机器学习模型设计和普适机器学习分类器设计研究后,本文在实例Smart—It中应用agent普适机器学习分类器,通过分析使用前后的数据。对比其优缺点。 相似文献
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Sachin Singh Sushil Puradkar Yugyung Lee 《Information Systems and E-Business Management》2006,4(4):421-439
Ubiquitous computing refers to building a global computing environment where seamless and invisible access to computing resources is provided to the user. Pervasive computing deals with acquiring context knowledge from the environment and providing dynamic, proactive and context-aware services to the user. A Ubiquitous computing environment is created by sharing knowledge and information between Pervasive computing environments. In this paper we propose a framework that uses the potential of the Semantic Web to weave Pervasive computing environments into a Ubiquitous computing environment. We discuss how the collaboration of these Pervasive environments can create an effective Ubiquitous computing environment referred herein as the Integrated Global Pervasive Computing Framework (IGPF). We test the effectiveness of the Ubiquitous environment through a small scenario from a prototype system that we have implemented over this framework to handle medical emergency scenario. 相似文献