湖北数字气象档案管理RFID应用系统设计与应用

系统的硬件电路以51单片机为控制核心,使用RFID读卡器模块读取档案元数据信息并将其传至单片机,基于HTTP标准协议接口能够将气象档案RFID元数据传输至数字气象档案管理RFID应用系统。系统采用B/S模式,后台数据库使用ORACLE数据库管理软件,通过JAVA高级编程语言实现了具有气象档案储位管理、档案查询、档案销毁既安全管理模块的数字气象档案管理RFID应用系统软件。结果表明该系统能够实现气象档案的定位、查询及管理,具有较高的安全可靠性。     

基于STM32的指纹与射频考勤系统设计

随着普通高校的在校人数不断增加的情况下,用在对学生考勤的时间也随之增多,如何高效的对学生进行考勤成为了一大问题。因此,设计了一个射频与指纹同时兼容的考勤系统。本设计主要由五大模块构成,即WIFI模块、上位机模块、射频模块、指纹识别模块和MySQL数据库模块。学生需提前提前录入的射频或者指纹信息。进行考勤时,系统会随机选择考勤方式,射频模块或指纹模块接受到数据后与之前录入至MySQL数据库里的数据进行对比,如若对比成功则记录下对应时间并在上位机显示打卡成功。经过测试,该系统可以良好的运行,能准确的记录人员出入时间。     

一种基于GPRS的森林防火远程数据传输系统

针对传统的地面巡防、航空巡防等森林防火监测方法实时性差、监测效果不理想等问题,设计了基于GPRS技术的森林防火远程数据传输系统,硬件采用SIM300模块和单片机,由单片机发送指令控制GPRS工作,GRPS通过网络与上位机进行通信,并将数据上传给上位机.上位机以C++ Builder为开发环境,采用Microsoft SQL Server 2000作为系统的数据库,用C++Builder连接数据库,并实现数据的存储、显示和查询.实验结果表明,该系统能够实时监测森林各项信息数据,能够在很大程度上预防森林火灾的发生.     

基于LabVIEW的光伏发电远程电能监控系统设计

提出了一种直流母线式的有蓄电池有逆流发电系统结构。使用智能单相电能表作为电能信号的采集终端,将采集所得的各种电能信号采用MODBUS-RTU通讯协议通过485总线传输至485/USB转换器,再由转换器送至上位机进行读取。上位机的各种控制指令通过XBee无线传输模块发送给现场单片机控制模块,由单片机实现对现场设备的控制。通过LabVIEW开发平台编写可视化较强的上位机界面,并利用WEB发布技术将前面板发布至网络上进而实现运程监控。通过测试及分析,结果显示整个系统运行良好、稳定、实时性强。     

基于GSM的防盗系统

提出一种基于GSM(全球移动通信系统)通信模块和RF射频模块的防盗系统的设计方案.该防盗系统采用富士通MB95F204K单片机为控制核心,以38 KHz调频的红外收发对管作为报警触发器,利用GSM模块的收发短信功能,实现非法入侵时发送报警短信,接收密码短信开门,用RF射频模块实现刷卡开门,通过单片机的A/D转换器采样实现由一只I/O口控制16个按键,用易语言开发的上位机程序实现用户信息管理.经测试该低成本的可远程短信报警具有刷卡、按键输入密码、短信发送密码3种开门方式.     

基于GPRS的大气电场仪传输处理系统

通过使用宏电H7118C GPRS（通用分组无线电业务）DTU（数据传输单元）,使前端基于AT89S52的下位机采集系统采集到的大气电场仪相关数据传送至上位机,由上位机基于Delphi语言编写的软件进行接收处理。从而实现单片机和PC机的无线传输,实现对多站点进行远程监测的功能。本文主要讲述下位采集传送模块、通信模块和上位处理模块,并给出各部分重要功能的程序进行分析。无线传输方式节约了电场仪到上位机间传输线的成本和在电场仪附近建立监控点的人力物力财力,能够解决条件恶劣地区电场数据采集的实际困难,因此本研究具有很好的实用性。     

基于MQTT协议的智能家居数据传输系统

智能家居系统使用STM32单片机对SHT20温湿度模块和光敏模块协议的数据进行采集、存储,同时将采集的数据通过MQTT传输至服务器[1]。使用QT设计的PC端上位机通过MQTT访问服务器,读取环境的温湿度、亮度数据并显示。上位机也能控制终端的RGB灯、风扇等设备。     

基于单片机与LabVIEW的阴极保护智能监检测系统

文章针对海洋平台阴极保护智能监检测系统,采用单片机+HMI模式建立以太网通信,应用TCP通信协议采集保护阴极、牺牲阳极的电压信号与电流信号并做数据记录。阴极保护监测仪模块采集系统与模块进行通信,获取、解析数据并将数据存储至本地;阴极保护监测仪模块采集系统与上位机进行通信,上位机下发指令,模块采集系统通过相应指令将数据发送给上位机,实现海洋平台阴极保护电位、牺牲阳极发生电流、阴极极化电流的高保真转换和传输。     

电子心音听诊器

本电子心音听诊器可以实现采集心音信号,并经过模拟电路调理,由AD采集至单片机模块,处理后的数据经过串口通信传至上位机模块对信号进行分析.     

基于ZigBee的智能家居控制系统设计

设计了一个新颖的智能家居控制系统,该系统以CC2530无线单片机为主控,采用ZigBee无线传输技术实现上下位机的通信。下位机通过各类传感器获得家中的温度、湿度及电器工作状态信息等参数,并传送给上位机;上位机接收到信息并进行分析,把控制信号下达给继电器控制模块控制电器通断。同时,上位机还能将接收到的数据通过串口传输到PC进行显示和保存。经实际测试,该系统可以快速、准确地实现温湿度测量和家用电器的监视和控制,具有低成本、高实用性的特点。     

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