两个新的广义勾股数组

文[1]介绍了拉氏广义勾股数组，并给出一个新的数组：[18，19，…，34|35，36，…，42]；文[2]谓之[2n 1|n]型；并试图证其唯一性而未果，本文沿用文[2]的方法，又找到2个．设x 1为第一个数，求[n k|n]型广义勾股数，则     

广义τ-正交变换及其性质

利用内积给出了广义长度和广义正交变换的概念，获得了许多新的结果．推广了文[1]的相关结果．     

正交化的一种简便方法

文[1]给出了求标准正交基的一种简便方法,但仅适用于R~n,本文加强了文[1]引理2,给出了一个改进的正交化方法,适用于任意实内积空间。     

一类广义压缩条件下自映象的不动点定理

给出了一类广义KANNAN型压缩映象及其不动点定理 ,推广并改进了文 [1- 6 ]的一些重要结果。     

再谈广义移位矩阵的三条性质

在文[1]给出的广义移位矩阵的定义、功能和五条性质的基础上,再给出它的三条性质.     

关于“广义正定矩阵与稳定矩阵的关系”的注记

指出广义正定矩阵与稳定矩阵的关系;介绍文[2]的定理1的证明依赖于文[2]的引理1,而文[1]指出文[2]引理1的证明是错误的,证明文[1]的定理1是正确的。     

广义Г—环上的Morita定理

本文建立了广义Г—环上模的Morita结构,并由此得到了Morita定理;用此定理给出了广义单Artin—Г—环结构定理的另一证明方法。 在文[1]中,陈维新给出了广义Г—环的概念,[2]讨论了本原广义Г—二坏的结构,给出了广义Г—环上的模。在此基础上,本文引进了广Г—环上的投射生成模,模的α—张量积从而建立了Morita结构理论。并应用此理论与[2]中一些结果,给出了左、右Artin单广义Г—环的结构定理的另一证明方法。     

函数项级数一致收敛定理的证明和广义积分收敛的充要条件

用构造的方法,给出文[1]中函数项级数一致收敛定理的证明,并探索、研究广义积分收敛的充要条件。     

关于利用矩阵方法简化Schmidt正交化过程的研究

本文给出了一种仅用第三种初等列变换,便可完成Schmidt正交化过程的方法。较之文[1]、[2],本法适应范围更广。     

一个有趣的数论定理

1996年12月笔者研究了印度数学家乔特哈里和德什潘德发现的一组有趣连续数组956～968的性质（见文[1]、[2]、[3]）,其论文《完全平方数对半和的几个性质》发表于《数学通报》1999年第12期上,审稿人罗运纶老师另外给出了笔者论文结论的简化证明（见文[4]）,上海的俞润汝在《数学通报》2006年第2期发表的《Chaudhar—Deshpande数组的广义解》中给出了’笔者论文结论（见文[4]）的更简捷证明,     

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?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

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.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

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…