会讯预告

至3日在日本东京国际展览馆BIGSIDE举办。这是一次关于信息系统/网络/保安的综合展览会。日本许多著名公司参展。与展会同时还举办了围绕展会主题的论坛会。展会与论坛都包含RFID的内容。NEC、三菱电机、松下电工和Crossbow等日、美著名企业还展示了RFID产品及     

面向展会园区信息服务的射频识别和无线异构组网实例

本文面向展会园区信息服务,针对复杂环境下的RFID识别和实时数据采集分析应用,基于WiMAX+WiFi联合组网,并结合Mesh网结构,提出了多种接入方式相结合的分层无线异构网络,并基于此实现了RFID信息平台和智能监控系统。通过实例详细介绍了WiFi网络规划。本文提出的无线异构网络已在示范平台上进行了业务能力验证。     

基于RFID技术的EPC网络系统

RFID的网络化即是将RFID技术与互联网、通信等技术相结合,构造全球范围内的物联网。本文介绍了RFID技术的系统组成和工作原理。将RFID技术与Internet相结合构造EPC网络,给出了EPC网络系统架构,分析EPC网络的工作流程及主要网络实体的结构。     

新品方案

NCR TransitionWorksTM软件套件亮相上海“RFID沟通中国2006展会” NCR公司2月14日在上海举办的“RFID沟通中国2006展会”(RFID Connect China 2006)上展示了最新的NCR TransitionWorks软件套件。该软件套件堪称一个完备的软件平台,可便捷地整合并管理贯穿整个供应链、来自不同类型设备的数据,其中也包括基于RFID技术的设备。NCR TransitionWorks软件套件可以使任务中的关键信息在一个具有高精确且技术先进的环境中进行传递,能够实现即时数据通讯和分析。这套先进的软件能够     

国民技术移动支付解决方案亮相IIC—CHINA2011

国民技术于近日参展在深圳会展中心举办的IIC—CHINA。本届展会,国民技术的展示重点聚焦在RFID2．4G移动支付解决方案和CMMB单芯片接收解决方案,并现场演示RFID2．4G手机支付。     

RFID数据带宽计算及对网络性能的影响研究

RFID由于具有快速读写、非可视识别、移动识别等特点.因此得到了广泛的应用.而在实际应用时,需要计算大量电子标签附带的海量数据传输需要的带宽,并且要明确加入RFID网络后对现有网络的影响.本文给出了RFID数据所需带宽的计算方法,并以一个具体的例子分析了增加RFID子网后对整个网络性能的影响,可在RFID具体应用中作为参考.     

RFID网络数据清理技术的实践分析

近些年来,RFID即射频识别技术日益得到人们的广泛关注,而且该技术已经在很多应用领域中取得了成功,譬如在常见的物流、防伪等领域的应用。RFID技术的应用在很大程度上提高了相关行业的工作质量和工作效率。本文从RFID的概述谈起,详细介绍了RFID网络数据清理技术,就RFID网络数据清理技术的实践应用进行了全面的分析。     

基于ZigBee和RFID技术的仓库货物定位系统设计

针对现在仓库管理系统中货物存放混乱、查找困难等问题,基于RFID技术和ZigBee无线通信网络技术,设计了由RFID无源标签、RFID读写器、智能节点和网关组成的仓库货物定位系统。重点阐述基于空间三点定位算法的RFID网络定位系统;搭建基于ZigBee低速短距离传输的无线网络协议的低功耗、自组织数据传输网络;研究RFID数据传输和控制技术。经验证该系统可精确实现货物自动定位,有利于促进现代物流业向系统化、成本最小化、信息化、电子化方向发展,具有一定的理论研究意义和实际生产价值。     

基于P2P的RFID编码解析网络结构与算法研究

 本文结合P2P技术,提出了分级P2P RFID编码解析网络结构.并基于改进的kademlia算法,在该网络中实现了RFID编码解析服务.实验数据表明,分级P2P RFID编码解析网络相对于基于DNS技术的EPCglobal ONS,具有负载均衡、可扩展性好、能有效应对单点失效等优点.最后,本文给出分级P2P RFID编码解析网络需要继续深入考虑的问题.     

一种基于传感网和射频标签的异构网络设计

随着物联网技术的发展,无线传感器网络和RFID网络的融合技术渐渐成为一个热点的研究问题.通过将无线传感器网络的环境感知能力和RFID的物体识别定位能力结合起来的异构网络能极大的增强人们获取信息的全面性.在本文中,我们提出了一种基于WSN和RFID的异构网络的构建方法.该方法将无线传感器网络的环境感知能力和射频标签的物体识别能力结合起来,极大的提高了人们获取信息的全面性.     

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