点泛圈偶图的又一个充分条件

设G是连通偶图，（X1，X2）是其顶点的二分类，|X1|=|X2|=n,δ（G）≥t≥3。证明了若任意,u,v∈Xi，蕴含|N(u)∪N（v)|≥n-（t-2），i＝1，2，则当t=8时G是点泛圈偶图。     

关于Conrad子群Sγ的若干结果

G是ι－群，Гm(G)是G极小素子群所成集，Г(G)是G之正则子群所成根系，对于↓Aγ∈Г（G），Sγ=∩｛P∈Гm（G）|P包含于Gγ｝，称每个Sγ为Conrad子群。本文研究Sγ的特征，并由此建立扭类F与Fν^2以及Fν与SV之间的等价条件。     

点泛圈偶图的一个充分条件

设G是连通偶图，（X1，X2）是其顶点的二分类，|X1|=|X2|=n，δ（G）≥t≥3。证明了若任意u,v∈Xi蕴含|N(u)∪N(v)|≥n-（t-2），i=1,2，则当t=7时G是点泛圈偶图。     

Petersen图的关联图的Hamilton-性

对图G（V,E）,定义图I（G）为如下图：V（I（G））＝｛（ve)|v∈V（G）,e∈E（G）且v与e关联｝,E（I（G））＝｛（ue,vf）｜u＝v或e＝f或uv＝e或uv＝f｝称I（G）为G的关联图,其中（ue,vf）表示关联图I（G）的以ue和vf为端点的边、本文证明了Petersen图的关联图是Hamilton图     

关于M(o)bius梯的细分图的巧妙性

一个简单较G＝（V，E）被称为是巧妙的（felicitous)，若存在单射f:V(G)→{0,1,2,…，|E|}使得对所有的边e=uv∈E（G），由f^*()e)=f(x) f(y)(mod|E|)导出的映射f^*:E(G)→{0,1,2…，|E|-1}是双射。设G是简单图，在G的每相邻两顶点之间都加入一个顶点后所得到的图称为G的细分图，章证明了Moebius梯的细分图是巧妙图。     

无向色图的Hamilton性

本应用群论方法，证明了有限交换群的连通无向色图G（F，S）是Hamilton图。并由此得到：（i)Boesch-Tindell猜想的另一证明；（ii)有限交换群F具有对称色素S的连通色图D（F，S）是有向Hamiton图。     

关于Moebius梯的细分图的κ—优美性

一个简单图G＝（V，E）是κ-优美的（κ≥1为整数），如果存在单射f:V(G)→｛0，1，2，…，|E| κ-1｝使得对所有的边uv∈E(G)，由f^*(uv)=|f(u)-f(υ)|导出的映射f^*:E(G)→｛κ,κ 1,…,|E| κ-1｝是双射，设G是简单图，在G的每相邻两顶之间都加入一个顶点后所得到的图称为G的细分图。文章证明了Moebius梯的细分图是κ－优美图。     

邻域并与点泛圈偶图

设G是连通偶图，（X1，X2）是其顶点的二分类，|X1|=|X2|=n,δ（G）≥t≥3。文中证明了：若任意u,v∈X，蕴含|N(u)∪N(v)| ≥n-[(t-1)/2],i=1,2，则G是偶点泛圈。     

二分图为k-消去图的2个条件

图G的一个k 正则支撑子图称为G的k 因子 .若对G的任一边e ,图G总存在一个k 因子不含e ,则称G是k 消去图 .若图G存在一个划分 (X ,Y)使得G的每条边的端点分别在X和Y中 ,则称G =(X ,Y)为二分图 .证明了二分图G =(X ,Y)且X =Y是k 消去图的充分必要条件是kS≤r1+2r2 +… +k(rk+… +rΔ) -ε(S)对所有S X成立 .并由此给出二分图是k 消去图的一个邻集充分条件 .     

n— 可解群的Hall定理

本文证明了如下结果：设G是有限n-可解群，是一些素数的集合，若对任意p∈G都有（p,n(1-n))=1,则G是可解群，由此可把可解群的Hall定理完整地推广到n-可解群。     

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.