对函数点连续的思考

如何理解"函数点连续"的概念并能够灵活应用是高等教学初学者的最大问题之一,尤其是在如何判断函数连续点或间断点的应用方面.本文着重阐述了函数点连续的概念,并对其应用方法作了总结.     

精心设计问点 提高课堂效率

数学自身的逻辑性和理性特点决定了教学方法的重要性。本文主要从围绕学生的兴趣点提问,激发探究欲望;围绕知识点的坡度提问,培养解题方法;围绕思维的发散点提问,培养思维能力等方面论述了如何对课堂提问进行精心设计,以提高课堂效率。     

一类n维自映射无异状点的充要条件

给出了可降的n维自映射无异状点的若干充要条件.     

三角形中有关距离的极值问题

对等腰三角形，得到了到各项顶点距离之和的最佳值点必在底边的中线上；对一般的三角形，获到了到各顶点距离平方和的最小值点就是三角形的重心。在证明中，把初等几何，解析几何及微积分等方法，有机地结合起来了。     

延伸精典 扮靓作文

现今语文教材中的课文文质兼美,无一不堪称精典,笔者组织学生开了一个“课文亮点评论会”,找到了课文的五大亮点。学生将这些课文亮点纳为己用,有效地改变了他们“清水一杯,索然无味”的作文现状,从而也使课文的经典得以无限延伸。     

新课改下高中英语课堂教学的思考

新一轮基础教育课程改革实验正在全国范围内顺利推进,新课程走进了师生的生活。英语新课程体系在课程功能、结构、内容、实施、评价和管理等方面都较原来的课程有了较大的发展。本文结合我在英语教学改革中的实践,以契入点、着力点、触动点、迸发点为抓手,对此进行了阐述。     

教育类网站的艺术设计——点的应用

当前,大多数的教育类网站只注重网页的内容结构设计,而忽视了艺术性设计,形式单一、枯燥乏味,没有关注到浏览者的心理感受,从而使其功能大打折扣.所以,要想使教育类网站更好的为教育教学工作服务,就不能忽视它的艺术设计.在艺术设计中点元素是其重要的组成部分,掌握它的特点和视觉特征,研究它构成网页的艺术规律是网页设计者的基本功.在此基础上根据人的视觉经验和心理效应,从事物的本质认识客观世界,用一种全新的观念和思维方式表现出来.     

基于数字形态学的角点检测算法研究

给出了一种利用数学形态学来提取数字图像中的角点且能够区分凸角中角点和凹角中角点的方法．此方法与Harris点方法通过实验比较,形态学角点算法不会依赖于要找角点数量的给定值,并且可以分别找出凹角上的点、凸角上的点这两类不同的角点,深化了对图像的描述和理解．     

相近点训练法在确定站立点教学实践中的使用

在军事地形学教学中要贯彻落实“能打仗,打胜仗”的要求,就必须高度重视野外实践教学环节的教学质量。现地确定点位是野外教学的核心所在,是教学的重点,也是教学的难点。笔者在教学实践中总结创新了新的组训方法——相近点训练法,对学员快速掌握定位技能,高效提升识图、用图能力和地图与现地对照能力有极大地帮助。本文以确定站立点在图上为例说明教学实践中相近点训练法的使用方法与技巧。     

对于乘积自映射fΩ（f│（f））=P（f）

本文将一维紧致区间上连续自映射的几个结果推广到了任意维的乘积自映射。     

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,     

Western and Eastern culture differences in commercial field

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.     

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…     

风的曲线

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.