虚拟实验室的虚拟仪器开发

虚拟仪器在很多行业中都有广泛的应用,而基于虚拟仪器的虚拟实验室和被越来越多的高校所采用,在很大程度上提高了教学质量,节约了成本,本文以电路过渡过程监测仪的开发为例,揭示了虚拟仪器和虚拟实验室的开发过程中的问题和解决方式.     

电视机的虚拟开发与设计(二)——连接导线及机壳的虚拟开发

本文结合虚拟现实技术的设计与开发过程,对虚拟电视机中的连接导线和电视机外壳等基本结构要素进行了场景开发、动画控制和交互操作,并给出了大量的过程资料和效果图,对于电视机的开发具有一定的借鉴作用。     

基于virtools的虚拟实验开发

结合日常教学对虚拟实验的需要和当前虚拟实验开发现状,简要介绍了一款虚拟实现设计开发平台Virtools,以及在该平台下进行虚拟实验开发的步骤。提出将MultiGen Creator模型应用于该平台的思路,并对在开发过程中应当注意的问题进行了探讨。     

网上虚拟实验室的开发

多媒体技术（MT）和信息技术（IT）为教学、实验、实训的发展带来了新的契机，同时也为高等教育的现代化带来新的机遇，需求、和挑战，目前各院校都在开发虚拟实验平台，本文结合我们近期开发情况，介绍网上虚拟实验室的意义，开发的技术，基本体系结构，开发思路，设计过程。     

电视机的虚拟开发与设计（一）--电子元器件的虚拟开发设计

本文主要应用虚拟技术对电视机进行开发,在设计和开发过程中,主要对电视机的基本结构如电视机外壳、电子元器件、连接导线和PCB等结构要素进行交互操作、场景开发和动画控制,给出了详细的开发过程和开发效果图,对于电视机的开发具有一定的借鉴作用。     

基于HLA的分布式虚拟靶试系统开发研究

高层体系结构(HLA)是目前分布式交互仿真领域最新的通用技术框架,基于HLA的仿真是系统仿真的发展方向。文章结合实例分布式虚拟靶试系统对HLA框架下的仿真系统设计进行深入研究,对本系统的开发环境、设计流程及系统开发实现过程中所需解决的主要关键技术时间同步作了讨论。本项研究对其它领域内基于HLA的联邦设计和开发具有参考价值.     

加速新产品开发的虚拟制造技术

在产品的设计和制作过程中,往往会出现许多意想不到的实际问题,使设计工程师和车间现场的生产管理人员感到很难解决。如果能事先预见到这类问题并作出妥善解决的话,就可避免出现这些问题,从而可以加速新产品的开发并降低生产成本。     

基于ARM的嵌入式虚拟开发平台

为了解决目前大部份高校缺乏嵌入式开发平台的问题,提出了构建嵌入式虚拟开发平台方案.方案采用μVision4IDE和Proteus进行整合,在不需要购置嵌入式硬件设备的情况下,通过改造、整合原有实验设备,实现具有嵌入式系统设计、开发等软、硬件同步仿真调试功能的嵌入式虚拟实验室.同时给出了具体的教学模式革新和实施方法.     

医学虚拟仿真仪器的开发研究

通过对日本Sysmex XE-2100型血细胞分析仪的三维数字化重建和仿真功能开发研究,分析了虚拟现实软件EON Studio的技术特点和软件优势及其在虚拟医学仪器开发中的技术关键。该项研究工作为虚拟现实技术运用于医学教育和培训提供了可借鉴的经验。     

基于Proteus的单片机虚拟开发环境

单片机开发是自动化、电子技术等专业必须掌握的一门专业技能之一,为降低学习和单片机软硬件的开发成本,提高软,硬件的设计质量、提高产品开发速度,介绍一种基于Proteus的虚拟开发环境,使得软、硬件可以并行开发.该虚拟开发环境尤其有助于专业教学和实验工作.应用在产品研发领域使单片机控制系统的设计缺陷暴露在设计初期,显著提高单片机系统的开发速度和质量.     

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.     

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.     

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.