基于图形语言的图像处理算法开发环境模型

作为典型的数据流处理过程,图像处理和分析算法能将数据通过图形的方式表现出来,在此过程中,执行单元或操作单元以节点表示,数据值从节点计算到另外节点以连线表示。本文结合实际研发经验,提出相对应的图像分析算法和图像处理模型,构件基于图形语言的图像处理算法开发环境模型。     

基于Petri网的嵌入式系统建模

基于对传统Petri网结构的修改，文章提出了一种新的模型方式，并具体给出相应的结构定义，图形表示和行为规则。该方法实现了控制信息和数据信息的统一化表示，从而易于表示系统中的循环和条件操作。最后就嵌入式系统的描述举例说明。     

Excel 5.0的图形及图表

Excel 5.0 For Windows为用户提供了基本的图形对象,用户可以在工作表中绘制各种图形。例如直线、矩形、圆、椭圆、弧线、不规则图形、文字框等等。特别值得一提的是:Excel为用户提供了便捷的图表技术,可以根据工作表中的数据方便快速地生成各种直观的图表,用图形表示出数据,可以很清楚地从图表中看出销售的趋势,股市的动荡,各公司所占市场的份额等等。这些图表可以在工作表中生成,也可以在图表表格中生成。在工作表中生成的图表我们把它称为嵌入式图表(Embedded Chart),     

基于雷达图的多维数据可视化表示及特征分析

针对雷达图分析方法中存在的问题,讨论了用雷达图表示多维数据的数学模型,综合分析了可视化图形几何特征及其应用方法,建立了基于可视化图形分类的准确度的估算方法和按权重大小定义多维数据顺序的方法,有效地解决了传统雷达图分析方法中存在的面积不惟一等问题。     

一种新的电子束曝光机中间图形及其数据格式

在一种新的电子束曝光机二次曲线单元图的基础上定义了一种中间图形数据格式。该数据格式是为了将版图制造业标准数据格式转换为电子束曝光机专用数据格式服务的。它采用Niklans Wirth的表示方法进行定义，消除了二义性。经过实验性的程序验证，它不仅能很好地解决版图制造业标准数据格式不支持二次曲线的问题，而且图形设计人员可以直接以该数据作为标准，进行曝光图形的设计与存储。该数据格式的出现，为二次曲线单元图形在电子束曝光技术中的广泛应用奠定了良好的基础。     

用八叉树对三维图形进行处理的算法研究

利用八叉树表示物体，在实体造型系统中具有许多优点，主要讨论用八叉树三维图形进行处理的特点以及由三维图形八叉树转换的算法，同时介绍线性八叉树的基本思想。     

第五讲 数字电视中间件系统（4）

2 图形的坐标系。在图形系统中，为了表示出各图形元素间的位置关系，需要有统一的坐标系。基于不同目的，MHP包含可列坐标系。根据需要这些坐标系可以相互转换，主要有以下3种。     

高级语言与图形软件接口技术研究

对高级语言与图形软件的接口－－图形交换文件的结构进行了详细的分析，给出了大图形中提取数据及将数据转换为图形的流程和实践方法。     

Petri网图形的压缩存储与自动转换

本文给出了一种Ｐｅｔｒｉ网的计算机表示方法以及其图形的压缩存储／还原算法，并在此基础上对Ｐｅｔｒｉ网图形进行自动转换以产生此图的矩阵表示，这为在其上进行可达性分析和验证的自动化提供了极大的方便。     

用Matlab实现液晶显示控制芯片的可视化仿真

讨论了在设计256K彩色液晶显示控制芯片中如何采用matlab进行可视化仿真。在用VerilogHDL语言实现灰度调制算法后，利用仿真工具NC生成一组数据，通过matlab的图形着色功能可将这组数据转换为图形，从而直观地查看行列映射和图形显示效果，降低了仿真的复杂度，提高了效率。     

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.