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针对传统高频电路实验中存在的问题,提出在实验教学中引入Multisim进行仿真.利用Multisim对高频电路的典型电路丙类功率放大器和负阻振荡器进行了仿真,其各项结果与理论一致,且可方便地改变电路参数,观察不同条件下电路的工作情况.虚拟实验既能降低实验成本又能使实验在时间和空间上得到有效的延伸,是传统实验的一个必要的有益补充. 相似文献
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《实验室研究与探索》2013,(12)
针对传统信号与系统实验内容单一、实验方式固化、灵活性不够的缺陷,提出基于myDAQ和Multisim相结合的实验设计方法。首先根据实验要求设计电路,利用Multisim搭建所设计的电路,根据仿真结果对器件参数进行调整,并在面包板上准确搭建电路。然后通过myDAQ合成需要的输入信号,将该信号输出至面包板作为实际电路的输入信号,实际电路的输出信号通过myDAQ及配套的软件返回至计算机显示。最后在计算机上将Multisim的仿真结果与实际电路的输出结果进行比较,再次调整参数,进一步优化电路。实践表明,该方法很好地结合了软件仿真和硬件实验,加深了学生对相关理论原理和应用的理解,提高了学生自主实验的能力。 相似文献
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《实验室研究与探索》2018,(9)
针对模拟电路实验教学中存在的普遍问题,以"文氏电桥振荡"实验为例,将虚拟仿真软件Multisim应用到模拟电子实验教学中。借助软件的电路仿真功能,可直观形象地演示电路特性变化,如:改变电路的结构和参数等,增强了学生对复杂抽象的模拟电路理论知识的感性认识。在此基础上,针对模拟电子技术课程中的教学难点,实例阐述结合虚拟仿真的教学内容设计,对于学生深刻理解文氏电桥振荡器这部分的内容具有重要意义。将虚拟仿真技术应用于模拟电子实验课程教学是对传统教学方法和教学手段的有效补充,学生不只是观察波形产生的"结果",更是体会波形产生的"微观过程",进一步做到了理论联系实际。 相似文献
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朱高中 《实验室研究与探索》2013,32(2)
针对传统高频电路实验箱实践教学的不足,分析了应用电路仿真软件辅助实验教学的必要性,通过运用Multisim对二极管包络检波电路进行虚拟仿真实验,研究了二极管包络检波电路正常检波情况、惰性失真现象以及负峰切割失真现象等。通过不断地改变电路元件的参数进行对比观察得到二极管检波电路的相关特性,虚拟仿真实验结果和理论分析计算结果相一致。实践证明,将Multisim应用于高频电子线路仿真实验教学,可以克服实验教学中仪器仪表的不足以及各种干扰现象,使实验更加灵活,更具有创新性,也有利提高学生的学习的积极性和主动性。 相似文献
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基于Multisim仿真软件在高频实验教学中的应用研究 总被引:1,自引:0,他引:1
针对传统高频电路实验箱实验教学的不足,分析了用电路仿真软件辅助实验教学的必要性,通过运用Multisim对二极管包络检波电路进行虚拟仿真实验,研究了二极管包络检波电路正常检波情况、惰性失真现象以及负峰切割失真现象等,通过不断改变电路元件参数,并进行对比,观察得到:二极管检波电路的相关特性、虚拟仿真实验结果和理论分析计算结果相一致.实践证明:将Multisim应用于高频电子线路仿真实验教学,可以克服实验教学中仪器仪表的不足以及各种干扰现象,使实验更加灵活,更具有创新性,也有利于提高学生的学习积极性和主动性. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献