虚拟计算机

It also introduces how to use it to study operations of hard disk partitioning, formatting and using virtual operating system to build local area network without students' damaging the original system.

以及学生在不破坏原有系统的情况下，利用虚拟机软件来学习计算机硬盘地分区、格式化和使用虚拟操作系统建设局域网络等操作。

Some measurements and analyses of the electric parameters of arc welding power supply have been done using this system.

论文研制开发的多功能弧焊电源检测系统以虚拟仪器为技术平台，系统整合了包括电子技术、计算机技术、传感和检测技术、数字技术和虚拟仪器技术等在内的现代信息技术。

Compared with traditional bevel gear roll tester, the system overcomes the shortcoming of assessing bevel gear mesh quantity factitiously and can give the optimal setting distance parameter of gear and opinion, which is useful to improve the bevel gear mesh quantity.

本文利用目前流行的虚拟仪器开发工具LabVIEW，开发出一套以工业控制计算机为中心、具有虚拟仪器面板的锥齿轮传动质量动态综合检测分析系统软件。

It turned well when we utilize this method into the simulation of straight braking state for four-wheeler vehicles on symmetrical pavement, therefore, the self-optimizing control method is not only feasible but worth to be spread extensively.

介绍了计算机三维动画技术和虚拟现实技术，对三维动画和虚拟现实技术的原理、特征、研究方法及应用领域进行了论述。

Moreover, with the rapid development of computer technologies and virtual reality, WebGIS map publish system has been injected new vitality; in the situation of real 3D GIS development immaturely, the study of two-dimensional electronic maps and virtual scene integrated WebGIS system has some practical significance.

此外，计算机图形学及虚拟现实技术的快速发展，给WebGIS地图发布系统注入了新的活力，在目前真三维GIS系统发展不成熟的情况下，研究二维电子地图与虚拟场景集成的WebGIS应用系统具有一定的实际意义。

This paper bases on the technique of virtual prototype and utilizes software platform of UG, ADAMS and ANSYS to establish three-dimensional digitized virtual prototype of double link jib system of portal crane and systematically do its analysis of dynamics emulation of multi-body system.

本文基于虚拟样机技术，利用UG、ADAMS、ANSYS软件平台，建立了门座起重机四连杆组合臂架系统的三维数字化虚拟样机，并对其进行了较为系统的多体系统动力学仿真分析，实现了计算机对组合臂架系统在各种工况下随载荷变化的运行状态及随时间变化过程的仿真，得到的相关仿真分析数据对于门座起重机组合臂架系统动态设计提供了有效的手段。

Virtual Reality is a man - machine interface between people and the virtual environment generated by computer.

Mineral deposit ；虚拟现实是一种人与通过计算机生成的虚拟环境可自然交互的人机界面。

In order to solve this problem, this paper first presents a transparent computing system based on the Godson platform, and then analyzes some main technologies introduced in the design, such as the multi-OS remote booting protocol, the virtual disk mechanism, the virtual memory and swapping mechanism as well as the user and resource management.

为此，文中提出了一种基于龙芯平台的透明计算机系统，着重讨论了实现该系统的一些关键技术，如多操作系统远程启动协议、虚拟磁盘机制、虚拟内存与交换机制、用户及资源管理等。

The contents of the course include: what operating system are, what they do, how they are designed, and where they came from; a general history and explanations of computer system, and some discussion on hardware and the relation between operating system and other software; concept of process, process states and process control block, process queue, management of processes; concepts of sequent programming and parallel programming, process synchronization and its application, process communication; scheduling level and job state transition, job scheduling, process scheduling, and methods for scheduling; deadlock and its necessary conditions, deadlock prevention, control and recovery of deadlock; fixed partition, multiple partition and replacement partition memory management, swapping and overlays; page, segmentation and segmentation with paging storage management, basic concept of virtual memory management, and page, segmentation and segmentation with paging memory management.

课程的内容包括：计算机系统概述、操作系统的形成、发展、功能、特性、类型和发展趋势；操作系统的硬件环境、操作系统与其它系统软件的关系；进程的概念、进程的状态和进程控制块、进程队列、进程的管理；顺序程序设计和并行程序设计概念、进程间的同步与互斥、同步机构应用、进程间通信；调度的层次和作业状态转换，作业的调度、进程调度、调度算法；死锁问题的提出、死锁的必要条件、死锁的预防、避免、控制和恢复；固定分区、可复分区、多重分区内存管理技术以及覆盖技术和交换技术；分页域、分段域、段页域存储管理技术、虚拟存储管理的基本概念、分页域、分段域、段页域虚拟存储管理。

This mechanism makes the microinstruction execute orderly. Compared with the other model computer of virtual lab, the universality, autonomy and reusability of CPU_VLAB increase, and CPU_VLAB is interactive. In addition, the trigger-dispatching mechanism of CPU_VLAB provides references for developing virtual lab of computer hardware courses.

与已有的模型机虚拟实验平台相比，该实验平台不仅在通用性、自主性和可重用性等方面有较大的提高，而且具有良好的可交互性，同时，CPU_VLAB的组件调度机制为开发计算机硬件类课程虚拟实验平台提供参考。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。