基于移动代理的群管理探讨

研究了智能移动代理在网管领域的应用优势,包括降低网络负载和延时、自主执行、动态适应环境、异构性、协作性等方面。接着设计了移动代理软件,移动代理软件由应用接口模块、移动代理模块、信息转换模块和信息传输模块组成。具有应用需求输入、移动代理管理功能,同时基于JAVA语言开发,具有跨平台能力。并将移动代理与群管理相结合,研究了工作原理。最后附实例验证。     

接入网网管研究

从接入网网管模型和TMN分层结构的分析出发,结合当前流行的接入网网管实例,总结出接入网网管设计的重点;接入网网管和其他相关管理网接口的实现方法;并重点强调接人网网管对V5接口管理的实现.最后,展望接入网网管的发展方向,给出文者对宽带接入网网管的预测.     

一种分布式网管代理的研究与实现

本文介绍一种支持Q3接口适配的分布式网管代理的实现方案。该方案采用了支持连接高可用的软件总线和平台适配器,基于软件总线以分布式方式实现代理的各功能模块;基于平台适配器,使核心代理模块的开发与具体厂商开发平台无关,从而提高代理模块的重用性和系统开发效率。该方案已在接入网管建设中投入使用。实践证明效果良好。     

泉州电信综合网管系统的实施与效果

一、泉州电信综合网管系统概述1. 泉州电信综合网管系统的建设背景泉州电信本地网是一个容量大、覆盖广、科技含量高、设备类型较为繁杂的网络。虽然已经具备No.7信令网网管、接入网网管等七个专业网网管系统，但由于各个专业网网管系统由不同的厂商开发，在开发之前没有定义统一的信息交换和信息管理协议与格式，各个专业网网管系统采用各自的管理协议，互不兼容，使各个通信网网管系统之间的信息交换、信息管理通过人工方式进行，专业网管之间不能互联互通，形成了一个个网管孤岛，难以进行跨专业的相关性事件分析。泉州电信与大唐软件联…     

基于移动代理的SNMP网络管理体系研究

和传统的固定代理相比，移动代理可自主地在网络设备中迁移并进行本地数据采集和计算，这简化了网络管理者同代理之间的通信过程，降低了网管数据流量，减少了网管反应时间。首先，提出基于移动代理的SNMP网络管理体系的结构及实现，其次对比分析了传统SNMP网管的轮询和基于移动代理网管的串行、并行的访问方式，最后通过实验对上述三种方式的性能进行测试。实验结果表明，和传统固定代理相比，采用移动代理的网络管理体系能显著提高网络管理的效能。     

采用移动代理的分布式网络管理

文章给出了一种采用移动代理的网络管理方案。该方案通过移动代理将管理智能分布到网元,降低了网管平台的开销和网络负荷,可改善网管系统的可扩展性。文章最后还描述了该方案的系统结构和应用。     

基于移动agent的SNMP网管性能研究

本文针对SNMP网管所存在的问题,基于移动agent技术构建了一个与平台无关的运行环境,利用SNMP移动管理者和代理群实现动态的软件部署模式和多样的网管方式,使SNMP网管适应不同类型的被管设备和不同层次的管理需求,既兼顾已有系统,又提高网管性能.实验表明,移动agent技术能够为SNMP网管带来快速、灵活和高效的管理过程.     

基于移动代理网管平台的集成化系统模型研究

基于移动代理网管平台是一个重要的研究方向，针对该方向研究中出现的一些问题，本文提出一系列的解决方案。利用SNMP V3和移动代理的安全方案，提出了一个集成化的移动代理网管安全模型；引入JMX中间层作为标准化的平台接口：设计一个MIB接口解决网管和移动代理的互操作问题。最后将这个平台的结构进行了细化，并与原有管理模型进行了比较分析。     

基于软件总线与Web/Java技术的EPON网络管理系统

在提出EPON网管系统的体系结构和功能需求的基础上，使用软件总线和Web／Java技术，设计了基于消息总线的EPON网管系统软件结构，EPON网管系统包括图形用户界面、后台管理程序、消息总线(消息请求代理)、网管接口程序和数据库五部分，本讨论了EPON网管系统的配置管理模块、故障管理模块、拓扑管理模块、性能管理模块、用户管理模块和业务管理模块的设计，并给出了此EPON网管系统的实现情况。     

第三代移动通信网的网络管理接口分析与设计

文章提出了以CORBA为基础、参考TMN思想结构的3G移动通信核心网的网管体系结构。此结构的接口设计发挥CORBA技术的优秀性能，充分考虑了网管技术和实际工程结合中的问题，全面分析网管服务器的接口功能，提出了以网管的功能集合为设计思路的新概念，拓展了面向对象的开发思想在3G网管开发中的使用。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks