Xen是一种开放源码的虚拟化平台，最初是在剑桥大学计算机实验室开发的。

Xen is an open source virtualization platform originally developed at the University of Cambridge Computer Laboratory.

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对计算机控制系统虚拟实验室的研究和开发现状作了综述。

This paper overviews the current research and development of the computer control system virtual laboratory.

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文章提出了基于NS 2模拟器的计算机网络虚拟实验室系统的设计模型和实现方法。

This paper proposes the design model and implementing method of computer network virtual lab system based on NS2simulator.

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