基于RFID的智能光缆巡检系统

根据光纤通信线路维护需求,设计了基于RFID技术的智能光缆巡检系统,系统主要由巡检仪、巡检点和巡检管理平台组成.该系统将RFID技术、GPS技术和ARM技术三者结合应用到线路维护领域,有效解决了光缆线路的智能巡检问题,具有广泛的应用前景.     

GPS在光缆线路维护中的应用——GPS实时光缆线路巡检系统

根据光缆维护的实际需要,将GPS与GPRS/3G网络相结合,构建了一个GPS实时光缆巡检系统;主要介绍了光缆巡检系统在实际工作中的应用方法,GPS实时光缆巡检系统的构成及主要的业务功能.     

手持智能巡检系统的应用

设备的巡检是保证设备运行的重要环节,智能化巡检系统针对必须要由人力完成的巡检工作,依托RFID识别、GPS定位和GPRS无线数据传输网络等技术,对整个巡检过程实现智能化管理,确保对巡检按时到位的管理与控制。     

基于GPRS技术的智能巡检系统的设计与实现

基于GPRS技术及射频识别技术设计的智能巡检系统设计,以实现巡检工作的自动化和智能化;利用RFID自动识别不同设备,根据识别结果进入相应的操作界面,由巡检人员进行参数的填写;并通过GPRS实现与服务器平台连接,现场数据将通过GPRS发送至系统的数据库中,方便用户的查询、分析。     

基于物联网的儿童、中小学生监护系统设计

介绍了一种基于GPS/RFID、GPRS技术的学生安全定位系统.该系统采用GPRS数据传输方式结合学校上位机监控管理,实现对儿童、中小学生在学校区域的实时定位与监护管理,确保学生的安全和实时性监控.     

基于RFID、GPS、GPRS的物流追踪系统的研制

介绍了一种基于RFID、GPS、GPRS技术的物流追踪系统.该系统采用GPRS数据传输方式结合上位机监控管理,采用低功耗控制芯片STM32F103RBT融合了GPS技术、GPRS技和ARM等工控领域的技术,实现对物流环节中物品的实时追踪,确保物流环节物流不会丢失和替换.     

基于GPS和RFID技术的智能巡检系统

针对企业生产设备的巡检工作中存在人为的错巡、漏巡等问题,设计实现了一种基于GPS和RFID技术的智能巡检系统。该系统以计算机为依托构建中央信息处理系统CIPS（Central Information Processing System）,以PocketPC作为巡检终端PS（Portable Station）,采用SQL Server 2000关系型数据库和SQL Server CE3.0嵌入式数据库技术,集RFID技术、GPS定位技术、信息管理、信息传输等多项技术于一体,完成信息在CIPS和PS之间的交互,实现巡检信息的综合处理。     

基于GPS/GSM和MSP430的巡检手持终端的设计与实现

为了解决对光缆干线巡检人员进行自动实时监督的问题,基于GPS全球定位系统和GSM数字蜂窝网,以超低功耗单片机MSP430为中央处理器,开发设计并实现了巡检手持终端设备。终端通过GPS获取巡线员的当前地理位置和时间信息,并以短消息的形式通过GSM网络发送至管理中心服务器,实现对巡检人员工作的监督。终端功耗低,体积小,待机时间长,易于携带,使用方便。尽管终端是为光缆巡检设计,但也可以用于其它很多需要巡检监督或地理位置信息采集的场合,通用性很强。     

基于GPS／GPRS的智能公交系统的设计与实现

针对国内外公共交通管理的实际情况及GPS技术的发展现状,以及目前国内没有将GPS,GPRS和GIS相融合以实现车辆定位信息的采集、收发和显示的成熟智能公交系统。文中设计一种基于GPS,GPRS和GIS技术的智能公交系统,并详细介绍了其组成结构和工作原理。该系统实现了基于GPS的车辆实时信息采集、基于GPRS的信息无线传输、基于GIS的车辆远程监控调度。     

车载定位导航终端的设计

设计了一种GSM/GPRS的车载定位导航终端.该终端基于先进的SOC技术,开发了单片机IP核中内嵌的特定功能,利用单片机的内置闪存ROM技术扩展系统存储空间,实现大量定位信息的存储,并设计了串口扩展电路、GPS模块和GSM/GPRS模块的双模控制等电路.介绍了车载终端的硬件和软件设计以及实现方法.实践证明:在实际的定位导航过程中,该终端具有较高的灵敏度、精确度和强大的信息处理能力.     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.