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《计算机网络》是一门开设广泛的课程,设计相关课程实验有助于学生理解网络系统基本原理和基本概念,提高网络操作应用能力。考虑到多数高等院校的课程学时安排、现有设备及实验室人员配备水平等因素,可以将仿真方法作为教学实验手段之一,通过仿真实现《计算机网络》教学课程实验设计,加深对教学内容的理解。文中阐述了现有的《计算机网络》教学实验仿真实现的主要思路及实现过程,并加以进行分析,探索了网络课程实验仿真实现的新思路。 相似文献
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在《计算机网络》课程的教学过程中,各类网络实验教学是其中一个重要的组成部分,而网络设备价格昂贵且不利于统一管理维护。实现一种适合高职高专院校《计算机网络》课程实验教学使用的虚拟实验环境,在保证和提高《计算机网络》课程实验教学质量同时,为课程的专业教师提供了一种新的教学实验方法。 相似文献
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针对一般计算机网络实验课程与实际应用有一定距离的情况,结合高校校园网的技术、装备、建设特点,提出一种基于校园网的网络工程教学实验模式,并在计算机网络课程教学中进行实践,取得了良好的实验教学效果。 相似文献
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许利军 《新乡学院学报(自然科学版)》2010,27(6):57-59
通过编写一个Otcl实例代码,实现了对网络拓扑的仿真,由此说明网络仿真是研究网络技术的有效工具;介绍了NS2仿真过程中代码编写、网络拓扑构建、实验演示等技巧,并通过分析实验输出文件得到了符合期望的结果;分析了网络延迟、抖动率、遗失率和平均吞吐量等网络模型性能。实验结果表明,NS2具有良好的实用性和较强的通用性。因此,使用NS2对教学实验网络建立仿真模型,不仅能很好地缓解高校网络实验室建设的压力,而且可以改善计算机网络课程实验教学方法和手段,取得计算机网络课程教学的良好效果,培养学生的创新思维。 相似文献
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利用虚拟主机软件在单机上构建网络课程实验平台 总被引:6,自引:0,他引:6
张翼 《太原师范学院学报(自然科学版)》2003,2(3):33-35,39
文章分析高等学校网络课程教学中的实践性教学任务,提出利用虚拟机软件在单机上构建网络课程教学实验平台,完成实践性教学任务. 相似文献
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本文针对师范本科院校的特点,对"计算机组成原理"课程的教学进行探讨,总结了"计算机组成原理"教学过程中所遇到的问题及课程的特点,并围绕教学方法、教学手段和教学实验进行研究并提出一些改革措施。 相似文献
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Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness. 相似文献
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Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly. 相似文献
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Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well. 相似文献
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The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation. 相似文献
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理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。 相似文献
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As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death. 相似文献
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Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system. 相似文献
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Miao Maosheng 《华南师范大学学报(自然科学版)》2014,(6)
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula- 相似文献
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Yang Weitao 《华南师范大学学报(自然科学版)》2014,46(6):137-138
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re- 相似文献
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Bernard Kirtman 《华南师范大学学报(自然科学版)》2014,(6)
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that 相似文献