虚拟

a kind of design project of multifunction electric power quality gauged instrument based on virtual instrument is put forward in this article.this system integrates virtual instrument programming and power electronics together,to realize diverse signals of current electric power quality field allin one.the integrated signal generator unit which carries out the collection of high speed digital data,d/ a conversion and analog output in four channels,unsymmetrical synchro control fifo etc.by fpga are introduced,the flow of electric power system various signal which generates by vc programming is elaborated,and the structural design of signal amplification unit is analysed.the experiment text result shows that this gauged instrument has attained current advanced high grade of accuracy and it will accelerate the steps of electric power quality calibration because of its accuracy and versatility.

摘 要：提出一种基于虚拟仪器技术的多功能电能质量标定仪的设计方案，采用虚拟仪器编程技术和电力电子技术相结合实现集目前电能质量领域的多样信号于一体。介绍采用fpga实现高速数字量采集、d/a转换及4通道模拟量输出、非对称同步控制fifo等的集成信号发生单元，阐述利用vc编程实现的电力系统多样信号的产生流程，分析信号放大单元的结构设计。实验测试结果表明该标定仪达到目前先进的高精度等级，由于其准确性和多功能性将加快电能质量标定的步伐。

Through VC program language and database technology, illustrated the virtual modeling system in the Pro/E, and validated the affectivity of the system which studied in this thesis.

最后，研究了各系统与PDM系统集成的方案和接口实现方法以及虚拟造型系统界面设计；对于虚拟造型系统，利用VC和数据库技术，在Pro/E环境中加以实现，取得了一定的成果，验证了本文研究原型系统的可行性。

Consequently, according to the definition and characteristics of mobile agent, multi-agent, etc., a model based on AGORA architecture for virtual enterprise is established in this paper. Two key phases, requirement and implementation, in virtual enterprise' lifecycle are illustrated in detail.

因此，本文在分析了移动Agent，多Agent等各种类型Agent的定义和特征基础上，提出利用AGORA多Agent体系结构来建立虚拟企业模型，并对虚拟企业生命周期中的两个关键阶段即需求和实施阶段讲行了详细的设计和说明。

With amalgamation of Virtual Reality and CSCW techniques, the concept of Virtual Environment is put forward.

虚拟现实技术与CSCW技术相融合，产生了虚拟环境的概念。

The model selection and parameters optimization for analog channel were discussed. The Laplace model and the Gauss model in common used in the video frequency were researched.

讨论了模拟信道的模型选取和参数优化，研究了视频序列中常用的Laplace模型和Gauss模型，提出了一种带校正系数的虚拟相关信道参数估计方法，验证了虚拟相关信道更接近残差数据的真实分布。

The world is animated cartoon of the virtual world, the lens design of virtual reality is filming machine lens design.

动画片的世界是虚拟的世界，动画片的镜头设计也是虚拟实拍摄机的镜头设计。

The running principle and flow of the platform are illustrated by the example of Fe and sulfuric acid chemistry action. The system can animatedly displays chemical experiment process with expansibility, reliability characteristics.

结果表明系统具有易扩充、较好的可靠性、且能动态反映虚拟实验过程，提供了在现有网络基础下的分布式实现三维虚拟实验的一种新方案。

In this thesis, we aim at solving the geometrical representation of some anomalistic objects. We try to combine the realistic representation and real-time control of the virtual natural scenes.

本论文工作旨在解决虚拟环境中不规则物体的表现问题，并达到虚拟场景的真实感和对其操作的实时性的较好结合。

Based on the teaching experience of our teachers ' practice, it is suggested that using the EWB software to create a program of virtual electronic lab system, and discussing thoroughly its appliance to the teaching of computer circuit (1) in the virtual lab.

根据我校教师的教学实践，提出了利用现有的 EWB 软件创建虚拟电子实验室系统的方案，并详细探讨了虚拟实验室在计算机电路基础（1）课程教学中的应用。

A kind of virtual tasting perception system of artificial fish in Intelligent Virtual Environment is proposed in this paper.

本文设计了在智能虚拟环境下人工鱼的一种虚拟味觉系统。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。