探讨几个数学猜想

本文探讨了正方形是优分割问题中的两个新想,指出猜想1不正确;而另外给出了一个猜想,并用所给猜想推导出猜想2,本文还讨论了两个代数不等式猜想,对其中一个猜想举出反例予以否定,对另一个猜想给予了证明。     

初中数学教学如何培养学生的猜想能力

猜想是人们依据事实、凭借直觉所做出的似真推测,是一种创造性的思维活动。著名数学家波利亚曾经说过：“要成为一个好的数学家,……你必须首先是一个好的猜想家。”数学发展史中的哥德巴赫猜想、费尔马猜想、欧拉猜想等都是著名的数学猜想,正因为有了这些猜想的提出,才使得后来的学者去努力探索,这些猜想对推动数学的发展起着方向性的作用。因此学生猜想能力的培养是十分重要和必要的。那么,在中学数学教学中如何培养学生的猜想能力呢？     

关于安道什猜想演化命题的奇数解问题

本文对安道什猜想演化命题给出了否定回答;并给出一个限定条件,在此条件下,安道什猜想为真。最后提出了一个新的猜想。     

物理探究教学中“提出猜想”环节实施策略探讨

一、“提出猜想”教学环节在实施中存在的问题 猜想是科学探究的一个重要要素，“提出猜想”则是科学探究教学的一个重要环节。然而，现行中学物理探究教学在实施“提出猜想”环节过程中存在一些问题。     

物理探究教学中“提出猜想”环节实施策略探讨

一、"提出猜想"教学环节在实施中存在的问题猜想是科学探究的一个重要要素,"提出猜想"则是科学探究教学的一个重要环节。然而,现行中学物理探究教学在实施"提出猜想"环节过程中存在一些问题。     

进行“数学猜想”的几种方法

牛顿曾说:“没有大胆的猜想,就做不出伟大的发现.“波利亚曾说:要成为一个好的数学家……,你必须首先是一个好的猜想家.”虽然数学猜想是一种直觉判断,但决不是盲目乱猜,要猜得准,就要总结猜想方法,提高猜想能力.下     

Collatz猜想的一个等价命题

得到了Collatz猜想的一个等价命题,为Collatc猜想的最终解决提供了一个新途径。     

数学课堂教学中培养“猜想能力”刍议

猜想是数学智慧中最活跃的成份,对学生猜想能力的培养,是数学学习过程中的一个重要环节;数学猜想不是胡思乱想,是合理猜想,是具有独创性的,是培养学生创造性思维的一种手段,教师可以从转变观念,培养学生数学猜想的意识、猜想兴趣、猜想能力,教会学生猜想的方法,会对猜想结果进行严密的证明等方面来提高学生的数学猜想能力,培养学生创新精神。     

谈中学数学教学中的猜想

猜想是人们依据已知事实和知识 ,对研究的问题和对象作出的一种预测性的判断 .它是一种极具创造性的思维活动 ,大科学家牛顿曾经说过 :“没有大胆的猜想就做不出伟大的发现 .”著名数学教育家波利亚也认为要想成为一个好的数学家 ,首先必须是一个好的猜想家 ,并提出 :“在数学教学中必须有猜想的地位” .那么 ,如何在中学数学教学中开展猜想教育呢 ?笔者认为 ,教师不仅要鼓励学生进行大胆猜想 ,使学生养成敢于猜想、勇于探索的思维习惯 ,更要教给他们一些猜想的规律和方法 ,使他们的猜想 ,猜之有“理” ,猜之有“据” .1　归纳猜想归纳猜想…     

初中数学教学如何培养学生的猜想能力

<正>著名数学家波利亚曾说过:"要成为一个好的数学家,你必须首先是一个好的猜想家."由此可见,科学、合理的猜想在数学学习中的地位举足轻重.数学就是在不断的证明或否定猜想中得以发展的.数学发展史中正是因为有了欧拉猜想、费尔马猜想、哥德巴赫猜想等著名的数学猜想,才使得后来的学者努力探索,有力地推动了数学科学的发展.那么,在初中数学教学中如何培养学生的猜想能力呢?一、营造和谐融洽的课堂氛围,让学生敢于猜想     

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.