查人人中国名人网男人腰疼是什么原因引起的:请专业人士帮俺翻译一下
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/08 07:28:53
摘 要：网络仿真在今天的通信与网络领域是一个非常重要的技术手段。随着通信技术的发展, 通信网络的结构和规模越来越复杂, 基于网络的应用也越来越多样化, 单纯地依靠经验进行网络的规划和设计、网络设备的研发以及网络协议的开发, 已经不能适应网络的发展需要。因而急需一种科学的手段来反映和预测网络的性能, 这导致了网络仿真技术的应运而生。
要规划和设计一个性能完善的网络系统,光靠理论计算或凭个人的组网经验是无法完成的。如果在真实的网络环境中进行性能研究、网络规划、设计和开发,不仅耗资大,而且在统计数据的收集和分析上也有一定困难。网络仿真是通过在计算机中构造虚拟的环境来反映现实的网络环境, 模拟现实中的网络行为, 从而可以有效提高网络规划和设计的可靠性和准确性, 明显降低网络投资风险, 减少不必要的投资浪费。
在实际工作中,往往通过网络仿真软件来模拟和估算其性能,通过模拟和仿真来调整一些网络参数以期达到最佳的使用效果。
文章介绍了网络仿真的发展历程和现时意义。通过简单概述当前常用的几种仿真软件，研究了它们不同的应用。其中重点分析了基于OPNET 的网络仿真。最后通过使用OPNET Modeler 软件仿真一个局域网来展示利用仿真软件进行仿真所涉及的环节, 并对所仿真网络的性能进行测量。
软件翻译，仅做参考
Communication network emulation on the basis of OPNET
Summary : The emulation of the network is a very important technological means in the fields of today's communication and network. With the development of communication technology, the structure and scale of the communication network are more and more complicated, on the basis of application of the network being more and more diversified , rely on experience to carry on the planning and design , research and development of the network equipment and development of the procotol of the network simply, can't already meet the needs of development of the network . Therefore need a kind of science means badly to reflect and predict the performance of the network, this has caused the arising at the historic moment of emulation technology of the network.
Is it plan and design one performance perfect network system to want, light calculate or be can't finished by theory according to personal group network experience. If carry on performance research , network planning , design and developing in the true network environment, not only cost heavy, but also collection and have certain difficulty on analysing in statistics. The emulation of the network is to reflect the realistic network environment through the environment with fictitious structure in the computer, the network behavior in simulation reality, thus the dependability and accuracy that can improve network planning and design effectively , obviously reduce the investment risk of the network, reducing unnecessary investment wastes.
In the real work, is it imitate and estimate performance their to come by emulation software through network often, and emulation is it adjust some network parameters expect up to the best result of using to come through imitate.
The article has introduced the development course of the emulation of the network and current meaning. Through summing up present several kinds of daily emulation software briefly , have studied their different application. Among them has analysed the network emulation based on OPNET especially. Show through using a LAN of OPNET Modeler software emulation finally that utilizes emulation software to carry on the link involved of emulation , and measure performance of the emulation network.
Based on OPNET correspondence network simulation
Abstract:The network simulation in today correspondence and the network domain is a count for much technical method. Along with communication development, correspondence network structure and scale more and more duplicate board based on network application also more and more diverse, purely depended upon the experience to carry on the network the plan and the design, the network equipment research and development as well as the network agreement opens already cannot meet the network development need. Thus urgently needs one scientific method to reflect and the forecast network performance, this caused the network simulation technology to arise at the historic moment .
Must plan and design the network which a performance consummates is the green light depends on the theoretical calculation or depends on individual network experience is unable to complete. If conducts the performance research, the network planning, the design in the real network environment and opens not only spends moreover also has in the statistical data collection and the analysis certainly difficultly. The network simulation is through the structure hypothesized environment reflects the reality in the computer the network environment, in the simulation reality network behavior, thus may effectively enhance the network planning and the design reliability and is accurate obviously reduces the network investment risk, reduces the nonessential investment waste in the practical work, often simulates and estimates its performance through network simulation software, adjusts some network parameters through the simulation and the simulation to the time to achieve the best use effect .
The article introduced the network simulation development course and the present significance. Through simple outline current commonly used several kind of simulations software, has studied their different application. Has analyzed with emphasis based on the OPNET network simulation. Finally through uses OPNET a Modeler software simulation local area network to demonstrate carries on the link using simulation software which the simulation involves and to the simulation network performance carries on the survey .