虚拟的

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。

Second, based on the screw theory, the'virtual joint'concept was proposed. By means of this concept, the conventional trajectory planning in Cartesian space was converted in the 'virtual joint'space, that is, the complex trajectory planning in Cartesian space was simplified by utilizing the trajectory planning in the'virtual joint'space.

第二、基于旋量理论提出了"虚拟关节"的概念，利用这一概念可以将传统的笛卡尔空间的轨迹规划转化成"虚拟关节"空间的轨迹规划，也就是说，利用简单的关节空间的轨迹规划方法实现了复杂的笛卡尔空间的轨迹规划。

Appling the techniques of virtual instrument, The method of constructing the monitoring system was proposed. The factors which affect the plate thickness and crown were analysised.

本论文详细分析了影响板带材纵向厚度和板凸度的各种因素，并以此作为主要的监测对象构建了硬、软件系统，第四章从硬件角度上阐述了虚拟仪器监测系统的搭建方法，论述了在PC-DAQ形式搭建的虚拟仪器系统中，数据采集卡的选择和设置方法。

At the saxne time, meLS VPN----a solution for integrated model is discussed indetail, including network comPonents of MPLS VPN and its operation mode. There arealso some problems that must be solved to build a MPLS VPN, such as customer addressspace overaPping, netWork accessibility constraini, VPN route uPdating, saving ofbackbone bandwidth, reducing of complexity of PE rooters and accessing Internet fromVPN, etc. MPLS VPN can solve all the problems, as well as bring us some values inscalability, imPlemotation and maintenance.

在此基础上，详细阐述了集成模型的解决方案——MPLS VPN的工作原理，包括MPLS VPN的网络构成和运行模式，对实现虚拟专用网所面临的问题：用户地址空间重叠、网络连通性约束、VPN路由信息更新、节省骨干网带宽资源、降低PE路由器处理的复杂性以及如何在虚拟专用网内访问Internet等提出了解决方案，并对MPLS VPN在扩展性、可实现性、可维护性方面的优势进行了说明。

In order to improve the operator's ability of distinguishing, diagnosing, and solving printing failures, a simulation printing failures learning system was established on the applying platform of a virtual printing press. Operator can learn how to distinguish the types of printing failures, to find the causes, and to solve the problems from the simulating printed products on a virtual printing press.

为了提高操作者对印刷故障的识别、诊断和排除能力，通过建立在虚拟印刷机使用平台上的印刷故障学习系统，使学习者能够在脱离物理样机的情况下，根据虚拟印刷品学习判断印刷故障的类型、产生的原因和解决方法。

The research of neural network realization can be traced back to 60's. It processes along with two avenues: fully hardware realization and virtual realization. Scientists have developed many neurochips supporting fully hardware realization. Neurocomputing simulating supporting environments, neurocomputing accelerators and parallel neurocomputing systems also have been developed for virtual realization of neural network.

神经网络实现技术的研究可以追朔到六十年代，该项研究一直是沿两个方向开展，即神经网络的全硬件实现和神经网络的虚拟实现，科学加们也研制出了许多支持神经网络全硬件实现的神经芯片，以及支持神经网络虚拟实现的各种神经计算软件模拟环境、加速器和并行神经计算机系统。

A program——VRMLMaker has been developed for the 3D chemical structure display on the Internet in our chinese drug database retrieval system. VRMLMaker can convert a molecular MOL2 or ML2 format file to VRML format files in four different styles:wire-frame, capped sticks, ball-and-stick, and a CPK space-filling model. VRMLMaker is developed based upon molecular model and virtual reality modeling languagetechniques. The working procedures of VRMLMaker are described.

何敏在开发基于Internet的中药信息检索系统时，为了解决三维(3D)化学结构在Internet上的传输和显示问题，利用分子模型和描述3D世界的虚拟现实模型语言等技术开发了一个可以把化学的MOL2或ML2格式文件转换为球棍型、空间充满型、线型、棍型等4种虚拟现实模型语言格式文件的软件。

Using the dynamic simulation software ADAMS to analyze the six-bar mechanism of shaping machine ;and through the virtual prototype,we get the optimum point from the optimization design of the acceleration and the press angle of shaping machine for the real machine;and we can get an example to the study of virtual prototyping.

简要介绍多体系统动力学的原理及多体系统动力学计算的积分方法，利用动力学仿真软件ADAMS，对牛头刨床的六杆机构进行分析，并通过虚拟样机技术，对牛头刨床加速度和压力角进行了优化设计。为实际的机构设计提供依据，也为虚拟样机技术的学习提供了实例

Firstly, the article introduces the concept of the virtual properties of online games, characteristics and law attributes; Secondly, some present situations for the domestic disputes are analyzed and some problems are presented.

首先，文章分别介绍了网络游戏虚拟财产的概念、特点、法律属性；其次，对目前国内一些常见纠纷形式进行了分析，随后又根据我国当前的实际情况与世界上其他国家所采取的措施针对本文提出了几点主要的建议；最后文章对未来网络游戏虚拟财产相关问题的完善解决抱有美好的展望。

Firstly, The simulation of Craftwork Process of Fully Mechanized Coalface is studied in the thesis and then analyses Craftwork Process of Fully Mechanized Coalface by using the Object-Oriented method.

本论文首先采用虚拟现实技术对综采工作面工艺过程进行仿真研究，然后利用面向对象的方法分析综采工作面的工艺过程；使用MultiGen Vega 和Vc 等软件，采用软件工程的方法开发仿真系统；解决了利用MultiGen、Vega 和Vc 进行建模和仿真驱动过程中的一系列关键技术问题，如碰撞检测，数据库技术，中文显示，运动模型，场景优化等。最后构建综采工作面虚拟现实系统，在主要场景实现中对所提出的关键技术做了实际的应用，从而验证了关键技术的有效性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。