四元数射影空间的全实伪脐子流形

获得了四元数射影空间的紧致全实伪脐子流殂的几个内蕴刚性定理,推广改进了四元数射影空间全极小子注形的相应结果。     

QP~m的子流形的Chen—不等式

给出四元射影空间的子流形的chen—不等式,并给出取等号的充要条件.     

四元数体上广义投射影矩阵和超广义投影矩阵

文中刻画了四元数体上广义投射影矩阵和超广义投影矩阵,并由此得出广义投影矩阵的等价条件,用不同的证明方法推广了复数域上广义投射影矩阵和超广义投影矩阵的性质,同时给出他们在偏序中的若干应用.     

四元数体上的范数理论和应用

在四元数向量空间和矩阵空间中引入范数定义,同时借助四元数向量和矩阵的复表示,可在很大程度上消除了四元数之间因乘积不可交换而造成的计算困难,能将范数理论直接应用于一些有关四元数的数值分析问题。     

四元数体上的范数理论和应用

在四元数向量空间和矩阵空间中引入范数定义，同时借助四元数向量和矩阵的复表示，可在很大程度上消除了四元数之间因乘积不可交换而造成的计算困难，能将范数理论直接应用于一些有关四元数的数值分析问题。     

四元数空间形式中混合型全拟脐QR-子流形

考查四元数空间形式中混合型全拟脐QR-子流形并研究了四元数空间形式中具有某种条件下的混合型伪脐QR-子流形.进而研究了四元数K(a)ehler流形的QR-子流形,给出了一些有趣的结果.     

四元数序列空间l~∞

以l∞空间的有关性质为基础研究四元数序列空间l∞的性质,即四元数序列空间l∞是一个完备不可分的空间.     

四元数序列空间l^∞

以l^∞空间的有关性质为基础研究四元数序列空间l^∞的性质,即四元数序列空间l^∞是一个完备不可分的空间.     

P~3中的Desargues对合定理

本文将射影平面上的Ｄｅｓａｒｇｕｅｓ对合定理推广到三维射影空间Ｐ３的完全四棱锥面与完全四面锥面中。     

基于四元数域总变差方法的压缩感知彩色图像重建算法(英文)

提出了一种基于四元数域总变差方法的彩色图像压缩感知重建算法,该算法可有效提高彩色图像的重建能力.首先,将彩色图像从RGB空间转换到CMYK空间,并将CMYK空间的各个分量赋值给一个四元数矩阵.同时通过四元数的欧拉形式,将四元数矩阵转换为幅度和相位的信息.然后,为了完善重建的结果,将四元数矩阵的幅度和相位作为压缩感知优化方程新的平滑约束项.最后,用基于梯度的迭代算法来求解压缩感知优化方程.实验结果表明,所提出的算法考虑了幅度和相位的信息,比现有的将彩色图像的3个分量当作独立分量的算法效果好.     

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.