基于ASON技术的电力通信网应用研究

电力通信新技术是智能电网建设的支撑和保证。介绍了ASON通信技术概念及其技术优势,并结合当前青海电力通信网的现状以及传统SDH/MSTP通信网的不足,指出了ASON作为新一代通信技术能够较好的解决目前电力通信网面临的诸多问题、满足电力数据业务日趋增长的需求。最后经过引入ASON技术的可行性分析,对青海电力通信网ASON组网规划进行了深入研究,对推广建设具有一定的指导意义。     

山西广电OTN传输网建设的思考

干线网传输技术经过长期发展,根据不同需求衍生出PDH→SDH→MSTP→PTN→ASON和WDM→OTN→ASON等多种技术演进路线,在多业务接入、光层交叉、智能调度等方面取得了长足进步。     

浅谈PTN技术在电力通信网中的应用

随着我国智能电网建设进程的推进以及电力调度自动化水平的不断提高,传统的SDH／MSTP传输体系由于其基于TDM内核的通道复用技术制约电力通信网向IP化、宽带化、业务多元化的方向发展,而基于IP的PTN技术正好迎合了电力通信网发展的新需求。PTN技术在电力通信网中逐渐取代MSTP成为新一代主流传输技术将成为一种趋势。     

中兴通讯ASON解决方案

本文通过介绍中兴通讯领先的ASON产品ZXMP C660/C640,结合对当前国内网络建设状况的深入分析,推出了最佳的ASON网络建设方案,即ASON MSTP全网解决方案,ASON的智能特性和MSTP灵活的业务提供能力有机结合,是满足国内运营商需求的最佳方案.     

承载移动互联网的传输网络组网模式分析

为更好满足移动互联网业务传输承载和网络架构变化,通过分析移动互联网业务特点和发展趋势,比较承载移动通信系统的典型传输技术,提出了承载移动互联网的3种传输组网模式：SDH/MSTP/OTN＋PTN混合组网模式、SDH/MSTP/OTN：PTN独立组网模式和DWDM/OTN/ASON＋PTN联合组网模式,并对其系统组成和网络结构分析与讨论,得出在不同条件下应选择最适合承载移动互联网的传输组网。     

ASON技术在电力通信专网中的应用探讨

随着电力通信网的发展,电力系统对于通信网的依赖性在不断增大,与传统的SDH传输网络比较,ASON网络结构具有智能性、可扩展性等优势。本文分析了ASON网络的体系结构及技术优势,探讨ASON技术在电力通信专网中的应用及组网模式。在电力通信专网系统中应用ASON技术将有效改善网络拓扑结构,提升网络带宽容量利用率,提高业务的可靠性和安全性等。     

电力通信网中ASON技术应用探析

随着电力通信网的不断发展,电力系统对于通信网的依赖性也在逐渐升高,相比传统的SDH传输网络,ASON拥有明显的可扩展性和智能性优势。文章就ASON体系结构、ASON的技术优势进行分析,然后对电力通信网中ASON技术应用进行具体的探讨。     

ASON技术演进及在城域网中的应用分析

本文简要介绍了ASON技术的架构、特点及技术演进,并结合当前城域网的特点给出了ASON与现有MSTP／SDH相结合的建议。     

智能光网络在贵阳教育城域网的应用研究

传统的教育城域网采用以SDH为基础的MSTP技术,存在管理实时性较差和带宽利用率较低等缺点,智能光网络ASON能解决贵阳传统教育城域网存在的问题.分析现有贵阳教育城域网的现状和所存在的问题,研究智能光网络在贵阳教育城域网发展中的应用.     

ASON智能光通信在东莞电力通信网中应用研究

由于传统的光网络已经无法满足业务的需求,因此智能光网络应运而生。本文分析了ASON智能光通信的原理和结构,论述了ASON智能光通信的技术特点,并给出了ASON智能光通信在东莞电力通信网中的应用实例。     

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.     

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.     

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.     

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