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函数迭代所产生的周期函数列 总被引:1,自引:0,他引:1
侯秀安 《南都学坛(南阳师专学报)》1999,19(3):36-37
探讨了函数迭代所产生的周期函数列及其在判别周期函数上的应用,进一步推广了文[3]、[4]的结论。 相似文献
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1 知识点释要函数是高中数学的基础.在每年的全国高中数学联赛中,函数问题以各种不同的形式出现,而且出现的比重也较高.3年来,这方面出现的试题主要有函数性质、函数方程、函数最值和不等式、函数迭代的问题.例如2005年联赛第8题、2006年联赛第2题考查了函数的单调性;2006年联赛第5题考查了函数的单调性和奇偶性;2006年联赛第7题考查了值域的求法;2004年联赛第8题考查了函数方程和赋值法;2006年联赛第15题考查了函数迭代;2004年联赛第3题和第15题以及2005年的第1题考查 相似文献
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张斌 《宁夏师范学院学报》1998,19(3):29-31
对多元函数的研究,通常是把多元函数问题转化为一元函数问题,再利用一元函数的结论推证,本文总结了在多元函数微分学数学中这种转化的几种常用方法。 相似文献
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云利英 《南昌教育学院学报》2013,(2):111-112
在中学数学里,仅研究初等超越函数,但对其证明没有涉及,作为教师,应该掌握初等函数超越性的证明。文章首先介绍了初等函数的定义及其分类,进而分析了各类初等函数的定义,接着探讨了指数函数的超越性、三角函数、反三角函数的超越性等问题。 相似文献
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给出了行列式函数的概念,建立了行列式与函数的关系,用行列式函数的性质证明了行列式的性质,并从分析的角度解决了代数学中的一些问题。 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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《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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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
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唐芳 《读与写:教育教学刊》2008,5(6)
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. 相似文献