等差级数方幂和的新方法

前n个自然数的方幂和，∑i=1 m im(简称等幂和)是一个古老的难题，从著名的Euler-Maclaurin定理出发，给出了任意一个等差列方幂和公式，更一般地得到了等幂和的计算公式。     

等幂和与Bernoulli数的简捷方法

自然数的方幂和：Ｓｍ（ｎ）＝Σｋ＝１ Ｋ＾ｍ（简称等幂和）是一个古老的难题。它与著名的伯努利数有着密切的联系;利用数论方法获得了等幂和的简单递推公式和Ｂｅｒｎｏｕｌｌｉ数的通解公式,得到了前１０７个等幂和公式及前１０６个Ｂｅｒｎｏｕｌｌｉ数的值。     

幂和序列的生成函数与幂和新的计算公式

研究了自然数方幂和的生成函数的递推公式,并给出了方幂和新的计算公式,利用递推公式很容易得到幂和的计算,为计算机解题提供了依据。     

关于n阶矩阵m次方幂的通项公式问题

文献[1]、[2]中曾通过判别矩阵△是幂零矩阵,文献[3]通过幂等矩阵对一般矩阵的方幂作出了讨论。本文通过三次幂等矩阵对矩阵方幂作出初步讨论,并同时指出文献[2]的两处疏漏,把文献[3]中的结果再推广一点。     

在p进制下的方幂和与和方幂问题

在ｐ进制下的方幂和与和方幂问题杨之在［１］中介绍了自然数在数码平方和与和平方变换下进入循环的问题，并提出问题：ｐ进制下的ｍ次方幂和与和方幂变换下有无类似性质？进而，在［２］中介绍了冯跃峰的结果，并预示ｐ进制下可类似证明，并进而提出了ｐ进制下的和方幂问...     

二元关系R方幂的范围及性质

二元关系的方幂有其规律性,利用同幂指数对其规律性进行探讨和研究,得出最小幂集的确定方法。     

一类差分方程的回归点集

本文讨论了周期点的周期为２的方幂的一类差分方程的回归点的性质,定义这类差分方程的第ｉ个分量仅依赖于交面ｉ外独立变量。     

自然数方幂和的一个简明算法

求前n个自然数方幂和的方法,目前大多采用递推形式求出。即是,欲求有n个自然数的K次幂之和(K为正整数),须先依次算出一次直至(K-1)次的方幂和,再计算K次方幂和。比如求:1~3+2~3+…+n~3,则要依次算出     

自然数方幂的累进和的两个猜想的证明

盛宏礼在《自然数方幂的累进和》(载《中学数学月刊》1997年第1期)一文中定义了自然数方幂的累进和如下:设S_t(n)=1~t 2~t … n~t,SS_t(n)=∑S_t(j),t∈N,并称SS_t(n)为自然数方幂的累进和,通过证明下述定理,建立了累进和与方幂和之间的关系, 定理 SS_t(n)=(n 1)S_t(n)-S_t 1(n).(1)     

一个数列的稠密性及其应用

设a是任何一个正实数,本文研究了数列()的项的分布。当a是正无理数时,这个数列在[0,1]中稠密,并由此得出了σ的方幂的一个有趣性质,其中σ为自然数,且σ不为10的方幂。     

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.