基于FPGA的远程信息家电监控系统

为了适应家电系统的要求和针对现有的MCU、ARM监控系统设计的不利扩展性和设计的复杂性,提出了基于GPRS、Internet和SOPC家电远程监控系统的方案。采用FPGA设计了基于NiOSⅡ软核处理器和IP组件的家庭网关硬件系统;并在NiosⅡ处理器上移植uClinux操作系统、采用嵌入式C语言编写了CGI程序实现动态Web服务器交互式访问。系统实现了GPRS无线接入和Internet有线接入访问Web服务器,系统真正意义实现了SOPC。     

基于ARM＆Linux的嵌入式设备远程调试模块设计

提供一种方便、高效的设备调试方案,即利用嵌入式技术采用网口替代常用的串行接口、USB接口等作为设备的调试接口.该系统以Atmel公司的AT91RM9200芯片为核心,以可裁减的μCLinux为操作系统,设计了嵌入式Web服务器.以此服务器为基础结合CGI技术实现设备远程调试器.给出系统硬件结构,介绍了Boa的移植和配置,并探讨了动态网页的设计方法.经实验,该系统具备高速、易用、传输距离远和无需上位机软件等优点;为设备调试和测控系统提供了一种有效的方案.这里利用嵌入式技术结合网络技术实现新型设备调试方案,比现有方案更灵活、高效、易用.     

基于Web服务器的高性能CCD相机数据采集系统设计

讨论了高性能CCD相机数据采集的方法,给出基于嵌入式Web服务器的相机数据采集系统的设计方法,并以ARM微处理器和Linux操作系统为核心,结合千兆光纤传输模块设计出嵌入式服务器平台,通过移植Boa服务器和编写CGI程序实现了图像数据的远程采集和高速传输.     

基于ARM9嵌入式网管系统的设计与实现

嵌入式网管系统是目前嵌入式软件发展方向之一,利用嵌入式Web服务器和嵌入式数据库可以实现数据的操作和设备的管理.文中针对多业务光纤接入设备,论述了基于ARM9处理器硬件平台的嵌入式网管系统的结构设计,并详细介绍了嵌入式Web服务器boa和嵌入式数据库sqlite在嵌入式linux操作系统中的移植方法,结合在串口与嵌入式网页之间交换数据的CGI网关程序说明了Web服务器boa和数据库sqlite在监控系统中的实现方法.     

移植uClinux到嵌入式系统的方法

uClinux是嵌入式系统上很受欢迎的操作系统,嵌入式系统运行uClinux要经过一个移植的过程。由于开放源代码的缘故,移植uClinux一般没有任何技术支持。移植者必须按照一定的步骤,根据各种不同的硬件情况,经过对源代码的修改,利用交叉编译环境,编译出适合特定嵌入式系统的uClinux内核文件,刷写到系统的FLASH存储器中,让uClinux在硬件上顺利的运行。移植成功以后,可以在系统上设计应用程序。     

移植uClinux到嵌入式系统的方法

uClinux是嵌入式系统上很受欢迎的操作系统,在嵌入式系统运行uClinux要经过一个移植的过程。由于开放源代码的缘故,移植uClinux一般没有任何技术支持。移植者必须按照一定的步骤,根据各种不同的硬件情况,经过对源代码的修改,利用交叉编译环境,编译出适合特定嵌入式系统的uClinux内核文件,刷写到系统的Flash存储器中,让uClinux在硬件上顺利地运行。移植成功以后,可以在系统上设计应用程序。     

基于CGI技术的嵌入式动态Web的研究与实现

为了在资源有限的嵌入式平台上有效地实现动态Web,以嵌入式Linux操作系统为软件平台,以mini2440开发板为硬件平台,利用CGI技术实现了动态Web。本文通过比较几种Web服务器的优缺点,选定了性能优异的Boa作为嵌入式Web服务器,并简要分析了Boa服务器的工作原理。文中深入研究了CGI技术原理及实现方法,提出了基于CGIC函数库的CGI应用程序的开发方式,完成了密码验证系统的CGI程序的编写,并实现了Boa服务器与Web页面的动态交互。     

移植uClinux到嵌入式系统的方法

uClinux是嵌入式系统上很受欢迎的操作系统，在嵌入式系统运行uClinux要经过一个移植的过程。由于开放源代码的缘故，移植uClinux一般没有任何技术支持。移植者必须按照一定的步骤，根据各种不同的硬件情况，经过对源代码的修改，利用交叉编译环境，编译出适合特定嵌入式系统的uClinux内核文件，刷写到系统的FLASH存储器中，让uClinux在硬件上顺利的运行。移植成功以后，可以在系统上设计应用程序。     

基于PIC的HTTP服务器端的研究与实现

以PIC24FJ256GA106单片机为对象,研究基于MCU的Web服务器设计实现方法。提出了以16位PIC单片机驱动以太网控制芯片的设计方案,设计嵌入式Webserver的系统结构。在应用层以HTTP协议为基础,构建嵌入式Web服务器,实现了浏览器与Web服务器的动态交互过程。软件开发设计方面,采用MPLAB IDE集成开发环境。最后将设计的嵌入式Web服务器应用于B/S模式的网络安防系统中,试验调试结果表明了这种方法的有效性,验证了传输功能的可靠性和稳定性、Web页面的实现等等。     

移植uClinux到嵌入式系统的方法

uClinux是嵌入式系统上很受欢迎的操作系统，在嵌入式系统运行uClinux要经过一个移植的过程。由于开放源代码的缘故，移植uClinux般没有任何技术支持。移植必须按照一定的步骤，根据各种不同的硬件情况，经过对源代码的修改，利用交叉编译环境，编译出适合特定嵌入式系统的uClinux内核件，刷写到系统的Flash存储器中，让uClinux在硬件上顺利地运行。移植成功以后，可以在系统上设计应用程序。     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.