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基于NS网络仿真器的研究与扩展 总被引:2,自引:0,他引:2
NS(NetworkSimulator)是一种功能强大的网络仿真软件 ,适用于网络层以上的各种网络研究的仿真工作。NS是由TCL与C + +语言共同开发的仿真软件 ,在C + +层定义了丰富的网络对象类供用户直接调用 ,用户也可以自己创建新的网络对象。本文介绍了NS的体系结构、输出结果等基本知识 ,并着重介绍了如何创建新的网络对象来扩展NS的功能 相似文献
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双8位乘法数模转换器TCL7528原理及应用 总被引:2,自引:0,他引:2
TCL7528是一种双路、8位数字-模拟转换器,主要介绍了该芯片的结构、特点、工作原理,给出了他的应用电路。 相似文献
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Many variants of thin film technology are nowadays part of the photovoltaic market. The most popular are amorphous silicon, CIS (Copper Indium Selenide)/CIGS (Copper Indium Gallium Selenide)/CIGSS (Copper Indium Gallium Sulphur Selenide), and CdS/CdTe (Cadmium Sulphide/Cadmium-Telluride) cells. All mentioned types allow potentially for a flexible cell structure. Most emitter contacts are currently based on TCOs (Transparent Conductive Oxides), however, wider approach with alternative carbon nanoforms, silver nanolayers and polymer materials, called TCLs (Transparent Conductive Layers) are also in use. Authors decided to investigate influence of mechanical stresses on physical and electrical behaviour of these layers. Consequently, the aim of work is to determine the level and possible mechanisms of flexible a-Si cell parameters degradation due to a deterioration of transparent contact properties. 相似文献
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The effect of AMP.PNP on the thermal stability and dynamics of myosin head were investigated by using DSC and different spin
label technique for chemically skinned muscle fibres prepared from rabbit. The thermal unfolding of the fibres in rigor, strong
as well as weak-binding state showed a complex process characterizing at least three discrete domain regions with different
stability (T
m =54, 58.4 and 62.3°C). The unfolding at 54°C refers to the catalytic domain of myosin, whereas transition at T
m =58.4°C represents the rod-like region. In the presence of AMP.PNP only the parameters of the last transition changed significantly
(T
m =70.4°C) showing an increased interaction between actin and myosin heads being attached to actin. Measurements on MSL-fibres
(labelled at Cys-707 of myosin) in the presence of AMP.PNP showed that about half of the cross-bridges dissociated from actin.
This fraction had a dynamic disorder, the other population had the same spectral feature as in rigor. In contrast, on TCSL-fibres
AMP.PNP increased the orientational disorder of myosin heads, a random population of spin labels was superimposed on the ADP-like
spectrum showing conformational and motional changes in the internal structure of myosin heads. ST EPR measurements reported
increased rotational mobility of spin labels in the presence of AMP.PNP. The DSC and EPR results suggest that in the presence
of AMP.PNP the attached heads have the same global orientation as in rigor, but the internal structure undergoes a local conformational
change.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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随着软件开发规模的增大、复杂程度的增加,软件测试变得越来越困难,ATE(自动化测试工具)能够降低软件测试的难度,提高测试效率。本文提出了一种基于TCL脚本的ATE的设计方法,并对重要模块进行了介绍。该工具具有很强的可移植性,通过适当的修改可对多种信令交互型的实体进行测试。 相似文献
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提出一套分层次的芯片验证架构理论和基于此验证架构下的各个验证组件的构造原理,并且描述了具体实现的方法.介绍使用C语言扩展TCL脚本语言的方法以及使用C语言扩展Verilog语言的PLI方法,通过使用共享缓存技术实现了验证组件的互联.最后基于Modelsim仿真工具编程实现了C++,TCL和PLI联合仿真验证环境的搭建.为目前芯片验证方法提出了一套现实的解决方案. 相似文献
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