共查询到20条相似文献,搜索用时 62 毫秒
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2月24日,华为3Com推出其交换机系列的旗舰产品——Quidway S8500系列万兆核心多业务路由交换机。Quidway S8500系列是由华为3Com公司自主开发的新一代高性能万兆核心路由交换机产品,可广泛应用于电子政务网核心层、校园网及教育城域网核心层、园区网和企业网核心层以及运营商IP城域网核心层、汇聚层。Quidway S8500基于10G平台设计,并支持新一代高性能万兆接口,能够为城域网、园区网、数据中心提供超高速链路,构建端到端以太网络,打造低成本、高性能、具有丰富业务支持能力的高性能网络。Quidway S8500提供大容量、高密度、模块化的二… 相似文献
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如何建设一个适合中国国情的、技术先进的电子政务网与应用解决方案、是广西壮族自治区纪律检查委员套电子政务网建设的目标。三个目标,五种功能广西壮族自治区纪律检查委员会电子政务网建设的目的非常明确,就是要建设一个支撑政府各个组成部门、直属机构、市直单位开展政务信息的标准统一、功能完善,安全可靠的网络平台;实现各直属机构和原己联网单位组成的高速骨干网络系统;实现直属机构和原已联网单位网络用户上政府同的需要。与此同时,在网络信息系统完成后,要能够实现五种基本功能。业务办公功能业务网络系统通过高速千兆网络技术接入各类服务器、终端工作站通过快速以太网与交换机互联、实现政府各项日常工作、办公业务。多媒体通信功能交换机提供千兆的网络带宽,支特多种通信协议、可在网络中进行各种网络的互联;对于不同的数据类型,如视频、数据、图像、动画等、可以直接通过骨干网络进行传输.同时也能实现远程办公。办公自动化网络通过布线系统实施与交换机的引进,将各种办公自动化功能体现出来、包括文件传输、Web管理、E-mail、各种应甩处理流程等:实现网上办套、www信息服务、电子邮件服务、公共信息服务和办公自动化。安全控制功能通过核心路由交换机的安装,实现对整个网络的安全控制,包括Internet出口的内外访问控制、虚拟网络间的通透性管理、各个网络节点的透明程度等。网络管理功能通过网络管理软件的使用,可以在中心机房对整个政府网的网络设备与各个远程二级交换机进行监控,自动进行故障定位与故障排除,方便地进行系统配置修改。以“三化”为基础,坚持设计原则作为实施电子政务的基础网络平台、网络系统的重要性对于现代化政府机构来说,就如同通信系统对于现代社会一样是不可或缺的。一个优秀的网络硬件平台的建设是实现电子政务业务系统信息化、自动化、现代化的重要基础。为此.广西壮族自治区圮律检查委员会在电子政务网建设的过程中,坚持了七点设计原则。稳定、可靠性只有运行稳定的网络、才是可靠的网络。而网络的可靠运行、取决于诸多因素、如网络的设计、产品的可靠性以及具有物理层、数据链路层和网络屡的备份技术等。 相似文献
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基于SIP的软交换系统中的应用服务器的研究与实现 总被引:2,自引:0,他引:2
NGN现在是通信领域的一大热门话题,在下一代网络的组成元素中,软交换是一个重要组件,是新老网络实现融合的枢纽。文章讨论了SIP协议对呼叫的处理,并详细介绍了软交换系统中应用服务器的具体实现。 相似文献
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Neural Computing and Applications - The different CNN models use many layers that typically include a stack of linear convolution layers combined with pooling and normalization layers to extract... 相似文献
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The NEon system offers an integrated approach to architecting, operating, and managing network services. NEon uses policy rules defining the operation of individual network services and produces a unified set of rules that generic packet-processing engines enforce. 相似文献
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对网络管理中网络流量监测的探讨 总被引:1,自引:0,他引:1
网络流量监测是网络管理的基础。为了更好地管理网络和改善网络的运行,网络管理者需要知道其网络的流量情况。比如,当网络管理者发现某些设备的流量负载过重时,就可以考虑在更换新的设备或者改造线路;当网络管理者发现了网络中数据流量变化的规律时,可以更好地调配设备,有效地利用资源。一个能够显示网络设备流量的工具,使网络管理者能够直观地监测设备流量的变化,对网络设备进行有效管理是很有必要的。 相似文献
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Fred Cohen 《Network Security》1999,1999(4):6-13
Computing operates in an almost universally networked environment, but the technical aspects of information protection have not kept up. As a result, the success of information security programmes has increasingly become a function of our ability to make prudent management decisions about organizational activities. Managing Network Security takes a management view of protection and seeks to reconcile the need for security with the limitations of technology. 相似文献
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《Expert systems with applications》2006,30(1):42-49
Gene networks describe functional pathways in a given cell or tissue, representing processes such as metabolism, gene expression regulation, and protein or RNA transport. Thus, learning gene network is a crucial problem in the post genome era. Most existing works learn gene networks by assuming one gene provokes the expression of another gene directly leading to an over-simplified model. In this paper, we show that the gene regulation is a complex problem with many hidden variables. We propose a semi-fixed model to represent the gene network as a Bayesian network with hidden variables. In addition, an effective algorithm based on semi-fixed structure learning is proposed to learn the model. Experimental results and comparison with the-state-of-the-art learning algorithms on artificial and real-life datasets confirm the effectiveness of our approach. 相似文献
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Deep multi-layered neural networks have nonlinear levels that allow them to represent highly varying nonlinear functions compactly. In this paper, we propose a new deep architecture with enhanced model discrimination ability that we refer to as mlpconv-wise supervised pre-training network in network (MPNIN). The process of information abstraction is facilitated within the receptive fields for MPNIN. The proposed architecture uses the framework of the recently developed NIN structure, which slides a universal approximator, such as a multilayer perceptron with rectifier units, across an image to extract features. However, the random initialization of NIN can produce poor solutions to gradient-based optimization. We use mlpconv-wise supervised pre-training to remedy this defect because this pre-training technique may contribute to overcoming the difficulties of training deep networks by better initializing the weights in all the layers. Moreover, batch normalization is applied to reduce internal covariate shift by pre-conditioning the model. Empirical investigations are conducted on the Mixed National Institute of Standards and Technology (MNIST), the Canadian Institute for Advanced Research (CIFAR-10), CIFAR-100, the Street View House Numbers (SVHN), the US Postal (USPS), Columbia University Image Library (COIL20), COIL100 and Olivetti Research Ltd (ORL) datasets, and the results verify the effectiveness of the proposed MPNIN architecture. 相似文献
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E. M. Gabidulin N. I. Pilipchuk B. Honary H. Rashwan 《Problems of Information Transmission》2013,49(2):179-191
We consider a communication network with random network coding which can be attacked by adversaries of two types. One of them can wiretap original packets outgoing from source to destination. The other can insert its own packets into information flow, which are wrong messages for the receiver. To provide secure communication, we use a scheme based on combining the GPT (Gabidulin-Paramonov-Tretjakov) public key cryptosystem and SKK (Silva-Kschischang-Koetter) codes. Encrypted packets are transmitted to the destination through wired channels. Performance of this system is investigated. The main result is that the proposed scheme is secure against wiretapping and insertion attacks under some conditions which depend on rank code parameters. 相似文献