下一代数据网网络技术和业务

文章首先分析了网络技术的发展趋势,包括固定数据网的总体发展趋势及其目标架构、各层次网络的发展趋势,接下来分析了业务的发展趋势并进行了展望,最后分析了不同层次网络包括骨干网、城域核心网、城域业务控制层、城域接入网、宽带接入网的最新技术进展。     

公共通信系统发展现状与展望

分析公众电话网、移动通信、互联网、城市应急通信等系统及有线与无线、固定与移动通信网络系统,并就这些典型公共通信系统的技术现状与发展趋势,展望下一代互联网IPV6协议的规划以及物联网的基本概念及发展趋势,展望物联网的应用前景,总结其应用特点。     

下一代通信技术的发展趋势

2发展趋势 本节介绍通信发展趋势，重点介绍传统的电信网、计算机网和有线电视网的现状、问题和发展趋势及三网融合的问题。并给出未来通信发展的基本指标和基本特色。     

融合和开放的下一代网络发展研究

文章总结了客户需求的发展趋势,简单介绍了下一代网络的架构,对业务网络和承载网络的特征及发展趋势分别进行了详细的阐述,指出了融合和开放是下一代网络的主要发展趋势。     

嵌入式技术发展迅猛 开源Linux操作系统受青睐(上)

近几年,随着软件、硬件技术的提高及市场的驱动,嵌入式系统应用越来越广泛.嵌入式处理器,嵌入式操作系统及嵌入式系统的应用领域都出现了新变化及新的发展趋势,如:多核技术、嵌入式Linux、嵌入式互联网应用等.本次论坛我们邀请了多位来自嵌入式系统供应商的专业人士,他们就这些新变化、发展趋势绘出了自己的精彩解读.     

大宽带背景下的家庭网络应用技术研究及发展探讨

本文从宽带提速、三网融合、全业务运营等网络发展及演进角度出发,在家庭物联网、IPv6等新技术发展趋势下,探讨家庭网络及业务应用的发展趋势,提出大宽带背景下的家庭网关开发建议,并对基于家庭网关提供全无线解决方案、IPv6支持等关键技术进行深入分析。     

混合集成电路的市场·技术·工艺设备

扼要介绍国内外混合集成电路(HIC)的现状和发展趋势,包括目前的市场规模和中短期市场预测、应用领域及前景、关键技术及相关工艺设备的水平和发展趋势,欲使读者对HIC的国内外情况有个概括的了解。     

移动互联网发展趋势分析

易观智库日前发布本季度《百度移动互联网发展趋势报告》,以百度移动搜索数据为基础,围绕用户分布及网络接入、移动互联网终端、移动互联网终端平台、手机浏览器和应用商店5个主题展开分析,带来了最新最详细的中国移动互联网发展趋势。     

PCB用微钻技术的趋势研究

以PCB行业的市场发展趋势为出发点,研究了PCB用微钻技术的现状和发展趋势。论文重点描述了小尺寸微钻的开发及量产技术、微钻表面强化技术、超细微孔的钻孔机理的研究进展。     

焦平面热像仪的发展与应用综述

简述了红外探测技术半个多世纪的发展历史,根据红外探测器的主要属性阐述红外探测器的分类、特点及发展成果,介绍了国外发达国家焦平面探测器件的发展成就和发展趋势,归纳了热像仪在军民两个领域中的应用的方面及应用的特定要求,分析提出热像仪的发展趋势和发展要求。     

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