论两类Smarandache行列式的推广

通过类似于Smarandache循环行列式、循环算术级数行列式、双对称行列式,定义了Smarandache循环几何级数行列式、双对称几何级数行列式及其一般化,并利用行列式的基本性质,解决了Smarandache循环几何级数行列式及其一般化和Smarandache双对称几何级数行列式的计算问题.     

“加边法”在行列式计算中的应用

行列式是代数学的一个重要组成部分,因此行列式的计算在整个行列式理论中显得至关重要,本文主要探讨了"加边法"在行列式计算中的应用,并列举了一些常见的行列式.     

行列式计算的几种常见的方法

本文介绍了将原行列式化为上(下)三角形行列式、递推法解行列式、升阶法(也叫加边法)解行列式和行列式中每行(列)的元素之和相等的类型等行列式计算中的几种典型的例题和解法。     

范德蒙(Vandermonde)行列式的应用

运用范德蒙行列式可以计算行列式,有些行列式经过简单变形后便可应用范德蒙行列式;有些行列式经过增加一行一列便可应用范德蒙行列式;有些行列式经过加边、拆行后便可应用范德蒙行列式;齐式元素的行列式可以利用行列式的乘法转化为二个行列式的积后可应用范德蒙行列式;二项式元素的行列式可以利用行列式的乘法后可应用范德蒙行列式;以多项式系数和常数项为元素的的行列式可以借助单位原根以及范德蒙行列式进行运算.     

关于行列式教学思路的探讨

对工程数学中行列式部分的教学内容及处理方式提出了一种改进思路 ,即通过行列式的归纳定义引出 n阶行列式的概念 ,由此证明行列式的性质 ,建立起行列式的理论     

用函数的观点研究行列式

给出了行列式函数的概念,建立了行列式与函数的关系,用行列式函数的性质证明了行列式的性质,并从分析的角度解决了代数学中的一些问题。     

函数观点在行列式中的应用

文章给出了行列式函数的概念,建立了行列式与函数的关系,用行列式函数的性质证明了行列式的性质,并从分析的角度解决了代数学中的一些问题。     

转置准行列式与准行列式

在文「１」准行列式的基础上，给出了一个新的概念－转置准行列式，得出了转置准行列式与准行列式的关系定理以及一系列相关结论，同时对准行列式一个重要结论给出了简捷证法。     

准行列式

本文给出了一个新的和式概念——准行列式。讨论了它的基本性质,得出了一系列类似于行列式的结论,同时,给出了准行列式的利用性质计算方法和一类准行列式的简洁求法。     

简析行列式的计算方法

计算行列式并无固定的方法,其实,同一个行列式可以有多种不同的方法进行计算。因此,除了掌握好行列式的基本性质外,针对行列式的结构特点,选取恰当的方法才能较快地计算行列式。本文对行列式的算法作了些总结。     

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!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.