Office 97技术讲座(三) Office 97中的VBA语言

Visual Basic for Applications(简称VBA)是新一代标准宏语言,是基于Visual Basic for Windows发展而来的。它与传统的宏语言不同,提供了面向对象的程序设计方法,及相当完整的程序设计语言。它易于学习掌握,用户可以使用其宏记录器记录用户的各种操作并将其转换为VBA程序代码。比如将日常工作转换为VBA程序代码,使工作自动化。因此,     

农业土地利用地理信息系统的开发实现

主要介绍了利用地理系统开发软件MapInfo Profession与高级程序开发语言Visual Basic进行集成二次开发农业土地利用地理信息系统。同时介绍了系统的总体设计目标、系统的总体体系结构及本系统的开发方法和系统部分功能的实现代码。     

MLS测试接收机测试软件设计

MLS测试接收机测试软件工作在Excel平台上，用户只需给出必要的信息，即可自动进行数据采集并对结果进行处理与保存．本文介绍了在Excel平台上利用Visual Basic语言进行MLS测试接收机(MTR)测试软件的开发过程，以及软件的主要功能。     

如何用VB开发“医学仪器”课程CAI课件

以“医学仪器”课程中的心脏电传导系统一章为例，介绍了如何用VB（Visual Basic)开发开放式CAI课件的设计思想、结构特点及编程技巧，并对该课件的应用效果进行了分析与评价。     

基于VB+Access的VB程序设计考试系统的实现

探讨了课程无纸化网络考试系统的设计与具体实现的方法.介绍了利用Visual Basic+Access开发无纸化网络考试系统的关键问题,给出了Visual Basic程序设计上机操作技能进行智能评阅的思路与解决方法,并就目前无纸化网络考试系统存在的问题进行了探讨.     

Visual Basic for Windows技术讲座(二)——VB应用程序设计方法

前面介绍了Visual Basic可视化设计工具的特点及其面向对象和事件驱动的程序设计思想,本讲将详细阐述如何使用VB开发Windows应用程序。在VB中一个应用程序称为一个项目(Project),用创建项目的方式来创建一个应用程序,用项目窗口来管理应用程序。 一、项目的创建 VB应用程序设计中没有主程序的概念,整个项目是由若干个子程序构成的,所以需要打破传统的顺序过程设计思想,建立面向对象和事件驱动的程序设计观念。     

在VB中将特殊类型的信息传递到DLL过程的方法

Microsoft公司开发的Visual Basic(以下简称VB）是一种功能极为强大的应用程序开发工具，是当今最优秀、最流行的程序设计语言之一。在使用WindowsAPI函数或其它动态链接库的过程中，常常碰到特殊类型信息传递的问题。从实用性的角度出发，介绍了几种常用的方法。     

面向对象的测控设备故障诊断专家系统的设计与实现

面向对象技术已越来越多地应用于专家系统的建造中。文章论述了一种基于CLIPS开发的面向对象的船载测控设备故障诊断专家系统的设计与实现,主要介绍了面向对象的知识表示方法,采用CLIPS与Visual C++语言混合编程的系统实现方法,以及CLIPS与Visual C++的嵌入设计方法。     

基于VFP的教师管理系统的设计与实现

介绍利用支持面向对象的程序设计的Visual FoxPro 作为工具开发教师信息管理系统,重点介绍教师信息管理系统的功能,数据库和系统关键程序的设计与实现.系统能够较好地满足当前高校对教师数据管理的要求,并且具有良好的扩展性,可与学校内部的其他信息管理系统相互集成应用.     

利用Visual Basic设计媒体播放器

利用Visual Basic作为开发工具，使用Visual Basic的ActiveX控件进行开发，通过设置ActiveX控件的属性改变其行为和外观，通过响应事件参与其处理过程，通过调用方法实现其各种功能，介绍ActiveX控件的使用方法、如何把ActiveX控件添加到窗体、如何在代码中调用和响应ActiveX控件的方法和事件，设计的媒体播放器能够播放Mp3，Wav，Mid等音频文件。     

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.