触摸屏技术的未来

义隆:iPhone采用电容式的触摸屏,它强调输入的方式是采用Multi-touch,即可使用多手指操作,将透明的电容式触摸屏贴在LCD面板上面构成,而义隆电子也拥有透明的电容式触摸屏之技术,将"电容式触摸屏"和"手写辨识"这二种技术整合在一起,我们称它为eFinger"e指神功".该技术最大的特色是可提供高分辨率之应用如象形文字之输入、光标控制及绘图功能,而且能于透明的电容式触摸屏上以手指直接用手写的方式输入中/英文及绘图.     

绘图奇兵SmartDraw

几乎每一位使用计算机的朋友都会在工作中遇到一些绘图方面的问题,比如制作工艺流程图、部门机构示意图、装潢设计图等。完成这些图形的制作当然可以使用专门的图形处理软件,可是大多数绘图软件不是太专业就是功能过于简单。因此,作为平时不常使用绘图软件、但又希望得到高质量绘图效果的用户来说,就迫切希望能得到一款适用范围广、功能相对强大的绘图软件。笔者今天向你介绍的SmartDraw 5.0就是可以在一定范围内取代AutoCAD和PhotoShop等专业图像处理软件的绘图工具包,它可以使你方便快捷地制作出专业效果的流程图来。下面,笔者就向你介绍它的一些主要特点。     

基于Matlab 6.x的Kalman滤波器的设计与仿真

从事控制系统分析与设计的技术人员常常为系统分析和设计带来的巨大、繁琐的计算工作量而苦恼。然而借助计算机强大的计算和绘图功能，采用合适的计算机辅助设计软件，可以解决这些问题的困扰。Matlab以其强大的功能，能方便的实现Kalman滤波嚣的设计与仿真，本文将讨论如何使用控制系统工具箱实现Kalman滤波。     

基亏Qt4的图形用户界面程序设计与游戏开发

Qt是跨平台开发图形界面C＋＋开发包,随着人们对图形用户界面的需求越来越高,得到了越来越广泛的使用。针对Qt使用越来越广泛的问题,介绍了基于Visual Studio 2008环境的Qt Creator开发平台的搭建与编程方法,重点分析Qt的信号与槽机制和事件处理方式,以及详细描述绘图事件、添加音频、定时器和按钮等的使...     

SmartDraw——让您成为专业绘图师

<正> 如今,Office97/2000在处理各种文稿方面已经用得非常普遍了,但是,在制作各种计算机及网络系统有线图、程序流程图、电子线路图等场合则显得力不从心,工程技术人员只能使用各种专业绘图软件。这些专业绘图软件制作的图片要插入到Office文档中往往需要各种转换,比较麻烦。下面介绍一个可供各类工程技术人员使用的绘图软件——SmartDraw,利用它可以在很短的时间内制作出可与专业绘图人员或使用专业绘图软件绘制的图表相媲美的图表。 读者可以到smartdraw.com网站免费下载SmartDraw绘图软件的试用版(http://www.smartdraw.com/smart-draw_jnstall2.exe),目前的最新版本为SmartDraw Ver5.0。使用     

基于Qt开发框架的多波束测深声呐显控技术研究

针对多波束测深系统(Multibeam Bathymetry System,MBS)的国产化、多平台兼容使用发展需求,从提升通信和存储效率、提升绘图效率以及优化人机交互流程等方面,基于Qt开发框架,自主设计开发一套可多平台移植、功能完备的MBS显控软件,具备声呐数据接收、处理、实时通道波形、水体剖面与地貌成像等功能.系...     

一种基于LPC3250的智能电子血压计设计

为了设计一种智能电子血压计方便患者随时检测,硬件部分采用NXP公司LPC3250微处理器、专用压力传感器XFGN-6025KPGSR和滤波器MAX267等,软件部分采用U-boot,ARMLinux,SQLite和Qt等。创新地采用3.5寸触摸屏显示和控制,并带语音播报;采用SQLite嵌入式数据库,为每一个用户分别进行数据记录、管理和分析;通过WiFi可随时将测量数据传输至医院。实际应用表明,该系统体积小,功耗低,智能化,检测速度快,实现了个人仪器医疗机构一体化的健康检测网络,很适合家庭用户,特别是老年人的使用。     

QTE/Qtopia在Liod-270上的移植

Qt、Liod-270平台简介 Qt/Embedded是Qt库开发商TrollTech(http://www.trolltech.corn/)发布的面向嵌入式系统的Qt版本.因为Qt是KDE等项目使用的GUI支持库,所以有许多基于Qt的X Window程序可以非常方便地移植到Qt/Embedded版本上.自从Qt/Embedded发布以来,就有大量的嵌入式Linux开发商转到了Qt/Embedded系统上,并且有多种免费版本可以使用.本次2006年"英特尔杯"全国大学生电子竞赛所用的Liod-270平台,除了可以使用TinyX以外也可以选择Qt.本文将以亿道电子提供的Liod-270平台为例,详细说明QTE/Qtopia的移植过程.     

基于Qt/E的电纸书中文输入法的设计

Qt/E是一个专门为嵌入式系统开发的GUI平台,其提供了轻量级窗口系统,减少了对内存的消耗,在高端手持设备和移动设备中得到广泛的应用。随着电纸书市场的不断扩大,用户对其功能要求的不断提高,使得研究带有触摸屏功能的电纸书的中文输入法具有重要意义。在Linux操作系统下,利用Qt图形用户界面开发工具,实现中文输入法。使其具有中英文输入,切换等通用键盘功能,满足用户需求和促进电纸书的推广。     

利用AutoCAD软件制作有线电视工程图纸小技巧

AutoCAD是美国AutoDesk公司开发的用于计算机绘图设计的软件，它自诞生以来，已从一个简单的二维绘图软件发展成为一个庞大的计算机辅助设计系统，广泛应用于建筑、机械、电子等工程设计领域，在它强大的技术平台框架上，构成了充满活力而又方便好用的设计环境。     

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