基于区分服务的因特网电话服务质量保障

因特网电话是IP网上一种非常重要的实时数据业务．如何在网络流量背景复杂的情况下保证因特网电话的服务质量是当前的一个研究热点．本文提出了一种完全基于区分服务架构的方案，保证因特网电话对服务质量的要求，同时照顾其他流量的公平性．     

带宽资源自适应节点级流量控制策略研究

简单介绍了ATM网络的流量控制方式，在此基础上，提出了一种新的流量控制模型，并阐述了工作原理及其在应用中涉及到的问题，最后，进行了仿真分析，结果表明，该模型具有良好的动态响应特性，可靠性和自适应性。这一工作也为提高网络的自主能力和智能化水平作出了有益的探索。     

探讨新一代智能变电站四网合一方案网络流量

本文结合新一代智能变电站提出的“四网合一”技术方案，分析在MMS、GOOSE、SV、1588共网传输方式下，对变电站网络报文流量进行探讨，为新一代智能变电站设备配置及设计方案提供参考。     

视频网站“钱”景让你欢喜让你忧

经过了视频网站元年的风雨，2007年对于视频网站的市场角逐来说，进入到越来越白垩化的阶段。与人潮涌进影院看“黄金甲”相比，视频网络流量有过之而无不及，不时传出因某恶搞视频的点击率过高，以至服务器几近瘫痪的消息。究竟是商业炒作，还是确有其事？网络视频两岁之际，谁独占鳌头？谁颗粒无收？越来越多视频作品的加入，给网站带来的是负债累累，还是财源滚滚？在人们的或喜或忧之中，胜负也许近在咫尺。     

计算机网络管理中网络流量监测研究

网络流量就是网络上传输的数据量。就象要根据来往车辆的流向和多少来设计道路的连接方式和宽度一样,根据网络流量设计网络是十分必要的。同时,在已建立的网络中进行网络流量的监测及用技术手段来控制网络流量,保证关键性的应用,是网络运行中过程必须非常关注的方面。     

浅谈高职院校网络的流量控制

为了保证网络核心业务的优先使用,保障网络有限的基础设施正常高效运转,有必要对校园网络进行流量控制。作为高职院校网络管理人员,十分重要的问题是如何提高网络性能、保障对网络的控制权。     

企业网络流量控制必要性研究

随着Internet的飞速发展,企业办公对互联网的依赖性越来越强,而使用有效流控设备组建高效局域网的企业却相对较少,造成企业网络拥塞。在通过对网络流量的深入分析基础上论证企业网络使用有效流控设备的必要性。     

一种基于用户端的网络流量计量仪的设计与实现

基于用户端的网络流量计量是一种实用、方便、便于消费者和计量监督的贸易结算方法.文章探讨了实现用户端网络信息流量计量的动因,提出了基于FPGA的硬件实现的用户端网络信息流量计量仪的总体设计方案及硬件实现方法.     

网络流量分析现状

网络流量分析是指捕捉网络中流动的数据包,并通过查看包内部数据以及进行相关的协议、流量分析、统计等来发现网络运行过程中出现的问题,它是网络和系统管理人员进行网络故障和性能诊断的有效工具。     

网络流量侦测ARP欺骗攻击研究

在局域网络中,ARP欺骗攻击是十分普遍的一种攻击形式,受攻击的机构内网会因为ARP欺骗攻击导致网络缓慢甚至停滞的现象发生。通过研究ARP欺骗攻击原理,如何通过网络流量检测来查找出ARP欺骗攻击,从而解决网络缓慢的情况。     

基于流量和时延的网络性能测量系统的研究

提出了一种间接测量网络吞吐率的新方法，建立了基于流量和时延的网络性能分析模型，基于这个模型对网络性能测量方法进行分析，设计并实现了一个基于流量和时延的网络性能测量系统，对网络性能进行了测量和分析。     

基于J2EE架构的标准样品库管理系统的设计与实现

针对目前异质网络环境下的信息查询需求,结合J2EE架构及MVC设计模式,研究了基于J2EE架构的信息管理系统体系结构。结合标准样品信息查询的实际需求,设计并实现了标准样品库管理系统。     

The application of multistable magnetic cores for dialing purposes in telephony

Multistable magnetic cores have the well-known property that a certain amount of flux, stored in the core, remains unchanged for a long time. This amount of flux can be broken down by feeding a number of voltage pulses, with a constant volt-second integral and the right polarity, to a core winding. Each of these readout pulses will lower the flux level in the core until there is no flux left, and from that moment a readout pulse only causes a small reversible change in flux, setting up a very short induction EMF in the core windings. A simple integrating network can be used to judge the output voltage of a winding, and it gives no output if the former results from a reversible flux change. If the pulse generator has a repetition frequence of ten cycles per second, the output pulses of the integrating network, after being shaped by a monostable trigger, will be suitable for dialing purposes in conventional telephone systems. A predetermined amount of flux, corresponding to one of the numbers one to ten, can easily be obtained by discharging a loaded condenser in series with a resistance through a core winding.     

The elementary flux modes of a manufacturing system: a novel approach to explore the relationship of network structure and function

Elementary flux modes (EFMs) are a concept from Systems Biology, where they serve as an indicator of component relevance in metabolic networks. An elementary flux mode is a functionally relevant, non-decomposable path through a given network. In this paper, we apply elementary flux mode analysis to manufacturing systems, with the aim of using the number of EFMs as a predictor for resource significance in the manufacturing system. For this, we formulate a network representation of a manufacturing process, which allows us to define the manufacturing equivalent of a stoichiometric matrix to draw an analogy between metabolic and manufacturing systems. This, in turn, allows the computation of EFMs, which we conduct in a case-study for a real manufacturing system. We further show that the change of EFMs under resource breakdown is a good indicator of the average order lateness in the manufacturing system. In this way, EFMs provide insight into the relationship of network structure and function in manufacturing.     

Smart Home Gateway Based on ZigBee Technology

Smart home gateway is the information exchange hub between the family network and external network which can accept signals from different external communication networks,transmit signals to a smart home devices to control and manage the home network through the smart home network internal devices. The smart home gateway design technology based on ZigBee is proposed through integrated network communication technology and embedded technology,and this paper describes the design and implementation of man controller,ZigBee communication module,an Ethernet interface and a wireless communication interface.     

Design and simulation on the publication delay control system

Based on the simulation study of the publication delay control process [Yu & al., 2005], transfer function models of delay control processes by adjusting the accepted contribution flux and the published contribution flux are identified using system identification. According to Cybernetics, the feedback control system of the publication delay is designed and control processes are simulated and analyzed when the average publication delay are regarded as the controlled object. On the basis of the relation between the average publication delay and the deposited contribution quantity, another control method is proposed that the deposited contribution quantity is regarded as the controlled object and the simulation result proves that the method is an excellent means and can help editors expediently manage their journals and control publication delays.     

LonWorks总线公路隧道通风控制器设计

介绍了LonWorks现场总线技术，并利用该技术设计了公路隧道舒适性通风和火灾事故通风智能型报警控制系统，实现了隧道通风智能型控制和网络化管理，从而为在传统的隧道通风设计和测控系统运用LonWorks技术开辟了一条有益途径。     

Role of Coupling Terms in Constitutive Relationships of Magnetostrictive Materials

Anhysteretic, coupled, linear and nonlinear constitutive relationship for magnetostrictive material is studied in this paper. Constitutive relationships of magnetostrictive material are represented through two equations, one for actuation and other for sensing, both of which are coupled through magneto-mechanical coefficient. Coupled model is studied without assuming any explicit direct relationship with magnetic field. In linear-coupled model, which is assumed to preserve the magnetic flux line continuity, the elastic modulus, the permeability and magneto-elastic constant are assumed as constant. In nonlinear-coupled model, the nonlinearity is decoupled and solved separately for the magnetic domain and mechanical domain using two nonlinear curves, namely the stress vs. strain curve and magnetic flux density vs. magnetic field curve. This is done by two different methods. In the first, the magnetic flux density is computed iteratively, while in the second, artificial neural network is used, where in the trained network will give the necessary strain and magnetic flux density for a given magnetic field and stress level. The effect of non-linearity is demonstrated on a magnetostrictive rod.     

基于C／S架构的通用件图形库设计与实现

 在产品设计过程中，如何对种类多、数量大的通用件工程图样进行设计重用已经成为CAD领域提高设计效率、规范设计标准的重要课题之一．通过对目前图形库技术新需求的分析，提出基于C／S架构的通用件图形库技术解决方案．根据此方案，结合对“舾装船通用件图形库管理系统”中通用件工程图样规范化、通用件图形库的建立和通用件图形库的检索与重用三个模块的描述，说明了该系统方案的实现过程．