“相量法”教学中应注意的问题

本文论述了在“相量法”教学中,教师应注意了解学生学习中的困难及其产生原因,并通过制定和灵活使用配套教学方案,课后巩固教学效果,来帮助学生克服“相量法”学习中的困难。     

分析正弦交流电路的相量图法

相量图法是分析正弦交流电路的一种重要方法。文中介绍了相量、复阻抗的基本定义及物理意义,具体论述了相量图法求解正弦交流电路的基本方法与技巧。     

浅谈相量法在快速分析计算正弦交流电路问题中的应用

相量法是分析正弦交流电路的重要方法,文中介绍了相量的有关概念,阐述了如何利用相量法快速解决正弦交流电路的常见问题,并以实例说明相量法在解决交流电路相关问题时的优越性和快捷性。     

相量图在分析正弦交流电路中的应用

相量图法是分析正弦交流电路的一种重要方法,文中介绍了相量、相量图以及复阻抗的基本定义和物理意义。具体论述了相量图法在分析正弦交流电路稳态、动态中的应用,阐明了应用相量图法解决复杂交流电路的方法与技巧。     

电工学教材中相量的引入及存在的问题

“相量”概念混淆了矢量与数量,在一部分场合下用它,而在另一部场合下不能用它。既然如此,我们为何不直接使用矢量概念呢,矢量代数是从物理学问题中抽象出来的,它当然可以作为分析物理学问题的工具。     

电流互感器的误差分析

本文从互感器的原理出发,导出互感器的误差成因,并给出使用中应注意的事项,为我们更好地了解、使用互感器打下基础。     

正弦交流电路分析中相量模型的运用

在正弦交流电路中,各物理量之间不仅有数量大小的关系,而且还有相位的关系。利用相量模型电路统领正弦交流电路的教学,使学生能运用直流电路的知识和分析方法及思维模式,来分析计算交流电路。通过教学班级对比,教学效果较好。     

一种很实用的相序指示器

本文对一种新型的相序指示器作出理论上的分析 ,并给出了三相 380伏用电系统指示器的参数选择。参数稍加改变 ,也可以应用到其它三相系统     

巧用相量图求解正弦交流电路

求解正弦交流电路，一般采用相量解析计算，而用相量图求解，在某些情况下更为简便，运用相量图求解关键是选择合适的参考相量，本文就此展开论述。     

试用新理念讲述相量法

本文从教学的角度，充分运用构造思维方法，讲述了相量法产生的背景以及相量法从雏形到逐步完善的过程。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

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?     

只要努力,不要后悔

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.     

浅谈移民问题

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.     

Sister Carrie, an Adherent of Desires

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.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

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.