共查询到20条相似文献，搜索用时 62 毫秒
1.
数与代数是义务教育阶段数学课程的重要内容.数学专家、中学数学教师和大学新生对数与代数领域的认识有很多共性,但在代数概念、代数内容、代数能力和思想方法方面,数学专家与中学数学教师之间存在很多差异.在代数能力方面,大学新生与数学专家、中学数学教师之间存在显著差异.因此,对中学代数本质的理解还需要重视,对代数内容的选择还需要研究,对代数能力和思想方法的提炼还需要加强. 相似文献
2.
朱怡权 《黄冈师范学院学报》2001,21(3):4-5,8
证明了弱FI－代数与BCI－代数是互相等价的。因而，可以充分利用BCI－代数的理论来研究弱FI－代数，此外，还证明弱MV－代数与MV－代数本质上也是同一概念。 相似文献
3.
朱林生 《常熟理工学院学报》2000,14(2):13-22
引进了ＣＮ李代数、ＣＳ李代数等概念,给出了ＣＮ李代数、ＣＳ李代数与Ｈｅｉｓｅｎｂｅｒｇ代数、对称自对偶李代数的关系,从而首次揭示了完备车代数与共形场论的关系． 相似文献
4.
朱林生 《常熟理工学院学报》1999,13(2):6-14
本文讨论了无限维Ｈｅｉｓｅｎｂｅｒｇ代数,Ｖｉｒａｓｏｒｏ代数与完备Ｌｉｅ代数的关系,用Ｋａｃ－Ｍｏｏｄｙ代数及ｌｏｏｐ扩张构造了几类无限维完备Ｌｉｅ代数。 相似文献
5.
主要研究Hom-quadri-代数和Hom-octo-代数,它们分别是由quadri-代数和octo-代数通过代数形变得出的。首先给出了Hom-associative-代数、Hom-pre-Lie-代数,Hom-dendriform代数和Loday代数的一些基本定义和性质,然后将quadri-代数、octo-代数的定义推广到了Hom-quadri-代数、Hom-octo-代数,最后研究并论证了Hom-quadri-代数和Hom-octo-代数与Hom-associative-代数、Hom-pre-Lie-代数、Hom-dendriform代数之间的关系。 相似文献
6.
研究李代数上的Poisson代数结构问题是代数学研究中的一个重要问题.基于扭Heisenberg-Virasoro代数的相关结果,利用根系阶化的方法首先给出Schrdinger-Witt代数的所有Poisson代数结构,进而确定出Schrdinger-Virasoro代数上的所有Poisson代数结构.该研究成果对于进一步研究其他相关代数上的Poisson代数结构有重要作用. 相似文献
7.
8.
9.
朱林生 《常熟理工学院学报》1996,5(1):16-22,15
给出了可完备化幂零Ｌｉｅ代数的概念，证明了Ｈｅｉｓｅｎｂｅｒｇ代数，正则ＡｂｅｌｉａｎＬｉｅ代数经幂零导子扩张所成的幂零Ｌｉｅ代数均为可完备化零Ｌｉｅ代数。 相似文献
10.
给出了效应代数水平和的定义,借助于水平和,列举并讨论了一个效应代数可以具有许多个序列积.最后,证明了作为特殊的效应代数-正交代数,能够分解为一些子效应代数的水平和. 相似文献
11.
12.
13.
《海外英语》2007,(5):10-11
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? 相似文献
14.
罗艳萍 《读与写:教育教学刊》2008,5(6)
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. 相似文献
15.
《海外英语》2007,(4):36
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. 相似文献
16.
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. 相似文献
17.
Richard Denner 《海外英语》2007,(4):14-15
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. 相似文献
18.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
19.
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. 相似文献