基于DSP的移动机器人的设计与实现

智能交通系统(ITS)是21世纪城市交通的发展方向，移动机器人作为智能车辆控制系统实验平台的一个主要部分，对ITS的关键技术的研究具有十分重要的意义。文中介绍面向ITS的SJTNC-1移动机器人的组成和结构，详细叙述了基于数字信号处理器TMS320LF2407A的控制系统的设计和实现。     

智能交通系统面临多个问题

中国ITS起步较晚，与发达国家相比还存在很大差距，加快发展并解决瓶颈问题仍是我国面临的课题。     

基于云计算的智能交通系统的研究

智能交通系统(ITS)在我国的发展处于起步阶段,面临着诸多问题:海量数据不能有效整合、偏远地区设备落后、各省各部门各自为战等。而云计算技术的发展将为智能交通系统的发展带来新的发展空间;两者的结合必将是未来的发展趋势。本文通过研究云计算技术在智能交通系统中的应用,提出了基于云计算技术的ITS平台(智能交通云),解决了交通信息共享、设备落后等问题。     

ITS系统中GPRS智能移动终端的设计

智能交通系统(ITS)被国际社会广泛认为是21世纪影响全世界人民生活和经济发展的重要产业之一。文中首先介绍了ITS的发展和现状,然后重点阐述了基于GPRS传输网络的智能移动终端,并且提出了一种相应的硬件设计和软件实现方法。试验表明,该终端能够成功地完成汽车的定位与监控等功能。     

智能交通系统标准化现状及发展趋势

智能交通系统(ITS)已成为未来交通运输业的重要发展方向之一.为使得不同国家地域间的智能交通系统可以互联互通,制定全球统一的标准体系成为当务之急.本文分别从ITS国际标准化和国内标准化两个方面对ITS标准的发展现状进行了介绍,同时对ITS未来的发展趋势进行了探讨.     

智能交通系统中的视频监控技术

介绍了在智能交通系统(ITS)中基于视频图像的车流量和车速检测、车辆类型检测和识别,以及车牌号码的定位和识别技术,并给出了应用实例.最后,结合目前的研究成果对视频图像在ITS中存在的问题和对未来的发展进行了展望.     

CDPD在智能交通系统中的应用

从介绍CDPD的原理及技术入手，以ITS中的道路信息提供系统的研究项目为背景，着重分析了选用CDPD的技术依据及其在ITS道路信息提供系统的实现方案，并给出了具体的软硬件实施细节。     

移动高清电子警察系统的设计

随着国民经济的快速发展,我国机动车数量迅猛增长。城市道路基础设施建设不断完善,基于电子信息技术的在智能交通系统(Intelligent Transportation System,简称ITS)迅猛发展。在ITS领域,高清移动雷达测速仪因其价格低廉,功能集成度高、使用灵活、操作简单等优点广受欢迎。     

MapInfo在基于GPS／GIS的车辆监控系统中的应用

随着GPS（全球定位系统）和GIS（地理信息系统）技术的不断发展，如何在电子地图上实时的显示车辆的位置，是目前ITS（智能交通系统）中的一个研究分支。对MapInfo标准桌面系统进行了介绍，并着重介绍了如何利用MapInfo实时显示车辆位置。     

我国智能交通的科技创新与发展

正智能交通系统(Intelligent Transportation System,ITS)作为现代交通运输系统的重要发展方向,在全球范围内受到普遍关注和重视。我国自上世纪末开始推动智能交通系统的建设发展,取得了显著的成效。智能交通系统具有显著的国情相关、行业相关、地域相关等特征,结合我国交通运输实际需求,我国的智能交通科技创新对我国交通运输的智能化发展起到了积极引领和推动作用。我国智能交通科技创新发展历程     

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.     

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.     

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.     

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