Applications and exploitation of Virtual Instruments based on Delphi6

This paper introduces hardware connections between computer and intellectualized instrument based on 89c51 sin-glechip .It gives the techniques to compile internet applications of Virtual Instruments with Delphi6.     

虚拟企业模型并行仿真研究

随着各种全新的制造理念,特别是虚拟企业的出现,企业模型的规模不断扩大,使目前存在的大多数企业模型仿真系统的效率大大下降。该文针对此问题,通过深入分析虚拟企业模型结构,并在已有的构件化企业建模体系CEMS及其仿真系统的基础上,结合异步仿真技术和多线程技术提出了一种分层式企业模型仿真体系结构,为虚拟企业模型的快速高效的仿真提供了一种有效的方法。     

基于虚拟测试技术的柴油机燃烧分析系统

运用虚拟仪器技术,开发了一种柴油机燃烧分析仪。该分析仪由高速数据采集卡及自行开发的控制软件组成。本文介绍了此分析系统的软件开发方法,并探讨了上止点的修正、示功图的光顺处理等问题。     

Java语言及其虚拟机技术探讨

随着Internet的迅猛发展，Internet编程语言Java愈来愈成为计算机行业的焦点。本文在简述了Java的主要特点后，重点对Java最关键的技术──虚拟机进行了深入的探讨。     

Accurate Depth of Field Simulation in Real Time

We present a new post processing method of simulating depth of field based on accurate calculations of circles of confusion. Compared to previous work, our method derives actual scene depth information directly from the existing depth buffer, requires no specialized rendering passes, and allows easy integration into existing rendering applications. Our implementation uses an adaptive, two‐pass filter, producing a high quality depth of field effect that can be executed entirely on the GPU, taking advantage of the parallelism of modern graphics cards and permitting real time performance when applied to large numbers of pixels.     

基于虚拟样机的智能诊断系统知识组织与表达

基于虚拟样机的智能诊断系统由协同支撑平台、模型库、样机引擎和虚拟环境组成.按系统-分系统-部件的次序进行故障诊断.诊断知识分为结构、故障处理、故障机理等10类.故障知识分经验、因果和定律三种类型.其知识表示把抢修对象的原理、维护、故障机理和维修等知识,以集合框架形式分类封装于诊断辅助系统知识库.试验证明该系统能准确表达诊断知识.     

EIGENVECTORS-BASED PARALLELISATION OF NESTED LOOPS WITH AFFINE DEPENDENCES

Abstract

This paper presents a method for parallelising nested loops with affine dependences. The data dependences of a program are represented exactly using a dependence matrix rather than an imprecise dependence abstraction. By a careful analysis of the eigenvectors and eigenvalues of the dependence matrix, we detect the parallelism inherent in the program, partition the iteration space of the program into sequential and parallel regions, and generate parallel code to execute these regions. For a class of programs considered in the paper, the proposed method can expose more coarse-grain and fine-grain parallelism than a hyperplane-based loop transformation.     

EFFECTIVE PARALLELIZATION TECHNIQUES FOR LOOP NESTS WITH NON-UNIFORM DEPENDENCES

The parallelism of loop nests with non-uniform dependences is difficult to extract and ineffectively explored by the existing parallelization schemes. In this paper, we propose new efficient techniques in extracting parallelism of loop nests with non-uniform dependences using their irregularity. By this way, current highly parallel multiprocessor systems such as multithreaded and clustering multiprocessor systems can be fully utilized. These four mechanisms are (a) parallelization part splitting, (b) partial parallelization decomposition, (c) irregular loop interchange and (d) growing pattern detection. They explore parallelisms of special parallel patterns for nested loops with non-uniform dependences. The loop transformations used in uniform loops are also applied in non-uniform dependence loops after legality tests. We apply the results of classical convex theory and detect special parallel patterns of dependence vectors. We also proposed an algorithm that combines above mechanisms to enhance parallelism. We demonstrate that our technique gives much better speedup and extracts more parallelism than the existing techniques. Thus, we are encouraged by these apparent enhancements to pursue further development.     

基于LABVIEW的电能质量在线监测和分析

本文讨论了国家标准规定的电能质量参数的计算方法,并利用LabVIEW创建了频率、谐波、三相不平衡度的测量和数据分析程序,同时采用DataSocket技术进行网络通信。设计出了基于LABVIEW的电能质量在线监测和分析系统,该系统提高了在线监测的灵活性和参数的精度并能及时记录相关的电压事件,能够长时间稳定工作,具有一定的实用价值。