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岳振才 《陕西理工学院学报(社会科学版)》2003,21(6):1-3
将BCK／BCI-代数的零化子概念推广到BZ-代数中，给出BZ-代数零化子的若干基本性质，举反例说明了BZ-代数中零化子一般不是理想。 相似文献
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在BCH-代数中引入结合理想、p-半单理想、拟结合理想等概念，并证明了一个BCH-代数，如果它的零理想是结合理想(或p-理想)，则它一定是结合(或p-半单)BCI-代数．但拟结合的BCH-代数未必是BCI-代数． 相似文献
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刘用麟 《泉州师范学院学报》2002,20(2):16-20
利用BCI -代数的Fuzzy理想定义了一个二元关系 ,证明了这个二元关系是同余关系 ,从而构造了商BCI -代数 .利用BCI -代数的Fuzzyq -理想、Fuzzyp -理想、Fuzzya -理想分别完全刻划相应的商BCI -代数类 .即 :设 μ是BCI -代数X的一个Fuzzy理想 ,则x/ μ是拟结合(p -半单、结合 )BCI-代数 ,当且仅当 μ是一个Fuzzyq -理想 (p -理想 ,a -理想 ) . 相似文献
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李金龙 《陕西理工学院学报(社会科学版)》2002,20(6):25-29
利用BCH－代数的理想给出了BCH－代数的商代数的一种定义方法，同时证明了BCH－代数的商代数是一个广义结合BCI－代数。 相似文献
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李金龙 《陕西理工学院学报(社会科学版)》2004,22(3):11-15,24
在BCH-代数中引入了Nil-理想的概念，即，是BCH．代数X的一个理想，且Vx∈I，存在n∈N^ ，使0*^nx=0．并对其进行研究，得到了许多结果． 相似文献
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给出n-李代数次理想的概念，证明幂零n-李代数的子代数都是次理想；n-李代数的次理想与其导代数相等时必为理想；n-李代数L的每个子代数都是次理想时，n-必可解等重要结果．从而给出了n-李代数的可解性与幂零性的关系． 相似文献
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引入N（2，2，0）代数的稳定化子的概念，证明了N（2，2，0）代数的每一个稳定化子集既是N（2，2，0）代数的理想又是其子代数，初步研究了稳定化子的一些性质。 相似文献
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引进BCI-代数的弱正定关联理想的概念,它是BCK-代数中的正定关联理想在BCI-代数中的自然推广.利用弱正定关职理想,成功地刻划了M.A.Chaudhry引入的弱正定关联BCI-代数,从而推广了K.Iseki与S.Tana-ka的一个著名结果. 相似文献
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引进了格蕴涵代数的Fuzzy素LI-理想和Fuzzy极大LI-理想的概念，探讨了Fuzzy ILI-理想的一些性质，获得了格蕴涵代数的Fuzzy素LI-理想九个特征与格H蕴涵代数的Fuzzy素LI-理想的八个特征。给出了Fuzzy素LI-理想的扩展性质，建立了各类Fuzzy LI-理想与LI-理想的联系，引进了格蕴涵数的Fuzzy零LI-理想。最后用相应的Fuzzy LI-理想刻画了某些类型的格蕴涵代数。 相似文献
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《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
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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
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《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
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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
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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
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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
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献