DirectX在有限元分析结果三维彩色云图生成方法中的应用

本文采用扫描线法,将DirectX技术应用到有限元分析结果三维彩色云图的生成方法中,利用DirectX的实体填充模式和高洛德着色模式完成云图渲染绘制。通过实例验证,本文给出的云图生成方法不仅效果好、速度快,而且方法简单、实用。该方法适用于各类场值三维彩色云图的生成,具有很好的通用性和扩展性。     

基于FastReport组件的毕业生报表的设计与实现

制作报表是管理信息系统开发中一项重要而复杂的工作,如何将数据库的数据生成到所需的报表文件,是需要认真考虑的问题。介绍在Delphi中利用FastReport报表组件设计和制作报表是一种有效快速的方法,详细讨论了报表设计和制作的过程,并且给出了毕业生花名册与毕业证书报表设计的实例。     

基于数学形态学的激光打标中环行扫描算法研究

分析激光打标中环行扫描的本质,运用数学形态学的腐蚀算法,实现多种复杂多边形的环行扫描.实际应用表明,该算法能快速生成扫描线,提高了打标效率.     

微球探针激光快速加工成形系统设计

为了方便快捷地制备微球探针,设计了一种微球探针激光快速加工成形系统.该系统主要由激光光源、激光控制器、光束调整组件、机械定位组件四个部分构成.通过该系统对微球探针进行加工实验,得到了尖端无明显缺陷且具有较好球形质量的微球探针,实验表明:该激光快速加工成形系统能够满足微球探针快速成形的制备要求.     

三维实时阴影快速生成方法的研究

本文提出了一种基于点光源的复杂三维模型阴影生成算法,该算法的基本思想是利用遮罩缓冲区快速生成可见面轮廓,并生成最大化影域多面体,然后利用扫描线算法判定景物表面的阴影区域,采用本阴影算法可使生成的阴影具有可控细节层次.     

基于COM的Matlab与C++Builder混合编程

以实例展示了通过Matlab6．5制作、并在C Builder5环境中调用COM组件的混合编程方法。给出了设置Matlab COM Builder编译环境的具体步骤,编译生成了与Microsoft Windows相兼容的COM组件;在c Builder下调用组件时通过安全数组的化入传出实现了应蹦程序与COM的数据接口,并通过简单的事件响应工程成功调用了所制作的实例组件。     

基于COM的通用邮件管理组件的设计与实现

针对众多开发工具中邮件功能的实现存在着灵活性、可控性和通用性比较差的缺点，提出了一种应用组件对象模型（COM）技术实现电子邮件管理组件的设计思想，并给出了组件实现的方法和过程。应用实例表明该组件具有良好的通用性和灵活性。     

三维实时阴影快速生成方法的研究

本文提出了一种基于点光源的复杂三维模型阴影生成算法,该算法的基本思想是利用遮罩缓冲区快速生成可见面轮廓,并生成最大化影域多面体,然后利用扫描线算法判定景物表面的阴影区域,采用本阴影算法可使生成的阴影具有可控细节层次.     

面向虚拟检测的测试功能组件研究

为了解决虚拟仪器软件设计效率低、重复劳动多、通用性及互换性差的问题,提出一种开发面向虚拟检测的测试功能组件的方法,即借鉴成熟的组件技术开发一系列可复用的虚拟测试功能组件。描述了虚拟测试功能组件的方法和开发过程,结合实例介绍了以测试功能组件为单位搭建虚拟仪器的过程。基于虚拟测试功能组件可以快速开发可互换虚拟检测仪器。     

一种改进的点在多边形内外判断算法

为解决多边形内外算法中BSP树退化为链表的问题,提出一种改进的点在多边形内外的判断算法。在构建水平扫描线的BSP树之前,对水平扫描线按照Y值进行排序,将排好序的水平扫描线按照二分法的顺序插入到BSP树中,其查找时间复杂度为O(lbn)。实验结果表明,该算法在不增加BSP构建时间复杂度的前提下,能够保证BSP树的查找效果总是最优的,且简单易行,具有较好的通用性。     

The Raid distributed database system

Raid, a robust and adaptable distributed database system for transaction processing, is described. Raid is a message-passing system, with server processes on each site. The servers manage concurrent processing, consistent replicated copies during site failures and atomic distributed commitment. A high-level, layered communications package provides a clean, location-independent interface between servers. The latest design of the communications package delivers messages via shared memory in a high-performance configuration in which several servers are linked into a single process. Raid provides the infrastructure to experimentally investigate various methods for supporting reliable distributed transaction processing. Measurements on transaction processing time and server CPU time are presented. Data and conclusions of experiments in three categories are also presented: communications software, consistent replicated copy control during site failures, and concurrent distributed checkpointing. A software tool for the evaluation of transaction processing algorithms in an operating system kernel is proposed     

RP过程控制系统模块化设计方法

针对RP（rapid prototyping）过程的复杂性,提出一种RP过程控制系统的模块化设计方法。本方法将软件和硬件有机结合,激光加工运动控制模块独立设计,可嵌入不同的RP设备中,有效降低开发成本。系统引入了加工代码查错及图形预览算法,可减少成型失败次数,提高成型效率。大量的实例应用验证了本系统的可行性及稳定性。     

Software design for analysis of multichannel intracardial and body surface electrocardiograms

Analysis of multichannel ECG recordings (body surface maps (BSMs) and intracardial maps) requires special software. We created a software package and a user interface on top of a commercial data analysis package (MATLAB) by a combination of high-level and low-level programming. Our software was created to satisfy the needs of a diverse group of researchers. It can handle a large variety of recording configurations. It allows for interactive usage through a fast and robust user interface, and batch processing for the analysis of large amounts of data. The package is user-extensible, includes routines for both common and experimental data processing tasks, and works on several computer platforms. The source code is made intelligible using software for structured documentation and is available to the users. The package is currently used by more than ten research groups analysing ECG data worldwide.     

一种基于Internet的JAR包使用信息收集方法

随着软件复用技术的发展,Internet上出现了大量可以被利用的软件资源,如Web Services, JAR包等。但是,这些软件资源常常缺乏必要的描述信息和使用说明。为此,提出了一种基于Internet的JAR包使用信息收集方法,以帮助用户检索并整理Internet上已经存在的JAR包描述信息和用户使用评论,辅助软件复用的成功进行。基于该方法,设计并实现了北京大学软件资源库JAR包使用信息收集子系统。该系统目前已经为6000余个JAR包资源收集、整理了相关的描述和评论信息。     

一种基于视频处理技术的转速测量方法

在传统的机电式转速测量方法中,测量精度极易受到外界强震动、电磁干扰等因素的影响。因此,提出一种基于视频处理技术的新型转速测量方法。它采用PC机与USB摄像头,通过VFW软件包将转动物体的视频转化为多幅连续静止图像,然后通过hough变换不断累计相邻两帧间的转动夹角以求得平均转速。该方法具有抗干扰能力强、性价比高、系统结构简单、易于多路集成等特点。本文详细介绍该方法的基本原理和关键实现技术,搭建仿真实验系统,通过示例验证该方案的可行性。     

RS-422数据处理软件设计

目前,RS-422数据总线的使用范围越来越广泛。主要介绍在飞行试验数据处理中,根据某型发动机参数通信协议对RS-422参数的提取和解算方法的设计。这种方法是针对机载测试在现有采集方式下,为完整、准确得到全部RS-422参数所提出的软件实现方法。     

Statistical Estimation of Software Reliability

When a new computer software package is developed, a testing procedure is often put into effect to eliminate the faults, or bugs, in the package. One common procedure is to try the package on a set of well-known problems to try to see if any errors result. This goes for some fixed time with all detected errors being noted. Then the testing stops and the package is carefully checked to determine the specific bugs that were responsible for the observed errors, and the package is then altered to remove these bugs. A problem of great importance is the estimation of the error rate of this revised software package.     

程序升温脱附联机系统研究

本文研制了程序升温脱附（ＴｅｍｐｅｒａｔｕｒｅＰｒｏｇｒａｍＤｅｓｏｒｐｔｉｏｎＴＰＤ）技术的联机系统，编写了ＴＰＤ信号和温度的实时采集及数据处理软件，本系统用ＩＢＭ－ＰＣ及兼容机作系统管理机，具有通用性强，便于应用和开发等特点，通过对Ａｌ２Ｏ３催化剂上吸附甲醇的表面性质研究应用表明，该联机系统采集的数据完整可靠，数据处理和显著打印灵活多样，软件采用弹出式菜单提示，操作方便，系统用中断方式实现多任     

A computational environment for the management, processing, and analysis of geological data

The complexity and diversity of data and processing now being used in geoscientific data analysis are increasing at such a pace that it is difficult to maintain a single software package capable of performing all required tasks. A typical solution is to use a number of commercial software packages loosely linked via file format conversion routines or other customized communication paths. Creating and maintaining these paths is made difficult by both the number of distinct packages being used and the evolutionary changes taking place within each package. In this paper we attempt to create a generic model for a geological data processing task, identify some of the difficulties involved in performing these tasks using current technology, and outline a computational architecture that may correct many of the deficiencies of existing technology. Our goal is not to provide a detailed design but to present some key issues and possible solutions as a foundation for discussion and investigation.     

Software Reliability: The Stopping Rule Problem

When a new computer software package is developed and all obvious erros removed, a testing procedure is often put into effect to eliminate the remaining errors in the package. One common procedure is to try the package on a set of randomly chosen problems. We suppose that whenever a program encounters an error, a system failure results. At this point the software is inspected to determine and remove the error responsible for the failure. This goes on for some time and two problems of interest are 1) to estimate the error rate of the software at a given time t, and 2) to develop a stopping rule for determining when to discontinue the testing and declare that the software is ready for use. In this paper, a model for the above is proposed as an estimation and stopping rule procedure.