计算机系毕业论文英文文献

《Online teaching in networked learning communities: A multi-method approach to studying the role of the teacher》《Teaching teleapprenticeships: Electronic network-based educational frameworks for improving teacher education》《Network-based language teaching》《The evolution of distance education_ Emerging technologies and distributed learning》……如果需要就留邮箱。 没有翻译。

一、开展网络辅助教学应用策略研究的现实意义采用网络辅助教学能有效改变现有教材的观念和模式，有利于面向全体学生，面向每一个学生，有利于发展学生自我获取学习信息的能力，有利于促进教师教学观念的改变。1. 激发学生学习兴趣，提高学生参与学习的积极性。采用网络辅助教学，能充分利用学生的好奇心理，促使其好奇心发展为强烈的求知欲。2. 拉大了教学的空间和时间。很多知识如果用传统媒体进行教学，非常耽误时间，学生的学习情绪不可避免地会受到挫伤，采用网络辅助教学会节约大量教学时间，保持教学的节奏，有利于学生的主动学习。3. 揭示知识内在规律，拓展学生思维的广度和深度。运用网络辅助教学，能促进学生主动参与，借助于观察、比较，逐步把握知识的实质，从而正确理解知识，掌握知识。4. 体现学生学习过程，降低学习难度。借助丰富的教学媒体能把高度抽象的知识直观显示出来，有助于学生理解概念的本质属性，促进学生知识体系的建立。5. 扩充学生所能接触到的学习信息，拓宽知识的选择面。借助网络辅助教学可将课堂教学的知识容量扩大，在一定的时间内学生可学到更多的知识。6. 便于教师在教学中进行及时反馈，控制好教学节奏。利用网络辅助教学，可以在有限的时间内进行多次的反馈练习，便于教师及时发现教学中存在的问题，及时做出调整。7. 有利于学生数学思维的发展。利用多媒体辅助教学通过模拟演示，突出实际操作过程，让学生通过观察、比较、分析、综合、抽象和概括，通过引导学生经历获取知识的思维过程，达到启迪思维的目的。8. 促进小学数学教材及教辅材料的建设。除了传统的印刷教材外，可以创造大量的音像教材和计算机教学辅助软件。二、网络辅助教学在小学数学教学上的应用(一)运用网络辅助教学在小学数学教学上的优势1. 优化概念教学。在小学数学概念教学中，由于学生思维的具体形象性与概念抽象性之间的矛盾，学生往往不易掌握。为突破这一难点，可从小学生的年龄特点出发，将多媒体引入教学中，激发学生的学习兴趣，锻炼学生的思维能力，将会取得良好的教学效果。2. 对应用题教学的优化。在小学数学应用题中，有些应用题的情景和数量关系比较复杂，学生不易理解，对这类应用题教师在讲解时可通过教具演示、线段图分析等辅助教学，帮助学生理解和掌握解题方法。3. 对计算教学的优化。利用网络对计算结果的快速呈现，可以有效帮助学生提高运算能力。4. 对几何教学的优化。利用课件帮助学生加深理解几何图形的基本概念，并指导学生操作，培养学生初步的空间观念，会取得较好的教学效果。(二)开展网络辅助教学的一般要求1. 符合教学规律，必须将网络技术与实际教学相结合。要结合实际，不能是为了用而用。如讲人教实验二下《克和千克》一课，如果不让学生亲自用手去感知克、千克有多重，而仅仅通过课件演示，那显然是非常错误的。2. 利用现代化教学手段的自身技术特点,充分激发学生的学习兴趣。3. 体现学生的主体性，培养学生创新意识。要促进学生的积极参与，防止教师个人“表演”。如张新锐老师讲北师大版一下《有趣的图形》一课，课后练习有一个是给轮船、火箭图上颜色，老师不是自己在大屏幕上演示，而是请一个小组的同学到控制台前大家先讨论后涂，涂得不对，计算机还会纠正。这个情节的设计就非常出色，调动了全班学生参与课堂活动An application, network aided instruction significance of researchUsing network aided instruction can effectively change the existing teaching ideas and modes, to face all student, every student, is beneficial to the development of the students' self learning ability to obtain information, to promote teachers' teaching concept of change.1 inspire students' interest, improve the students' enthusiasm of participation in learning. Using network aided instruction, can make full use of students' curiosity, to their curiosity development for the strong desire for knowledge.2 the widening of the teaching time and space. A lot of knowledge in the traditional media, if teaching, very delay, students' learning mood will inevitably by using network aided instruction, will save much time, keep the teaching of teaching for students of rhythm, active learning.3 reveals knowledge inherent laws, develops the student thought the breadth and depth. Using network aided instruction, can promote students' active participation, by observing, comparing and gradually grasp the essence of knowledge, knowledge, correct understanding of the knowledge.4 reflect students learning process and reduce the difficulty level. With abundant teaching media can make the highly abstract knowledge visual display, help students understand the essence of concept, promoting students' attribute to establish the system of knowledge.May expand students can access to information, broaden the knowledge of the study of choice. Using network aided instruction will be expanded knowledge capacity of classroom teaching, the students in a certain period of time can learn more knowledge.6 for teachers in teaching, the teaching feedback control good pace. Using network aided instruction, can be limited in time for many times, facilitate the feedback that teachers' teaching problems, and make timely adjust.7. To the development of students' mathematical thinking. Using multimedia assisted teaching through the simulation demonstrates, outstanding practical operation, lets the student through observing, comparing, analyzing, comprehensive, abstract and summarized through guide students through the thinking process of acquiring knowledge and achieve the purpose. Enlightened thinking,8. To promote elementary school mathematics teaching materials and teaching materials of construction. In addition to the traditional printing materials, can create lots of audio-visual materials and auxiliary teaching computer software.Second, internet-assisted teaching in elementary school mathematics teaching(a) using network aided instruction in the elementary school mathematics teaching advantages1) optimizing teaching concepts. In the elementary school mathematics teaching concept, because the students thinking vivid and concept, the conflict between abstraction is often difficult to master students. As a result, the students from the age of characteristics, introduction of multimedia teaching, arouse the students' interest in learning, the students' thinking ability, will obtain good teaching effect.2 the optimization problems in teaching. In the elementary school mathematics problems, some problems in the scene and quantity relationship is more complex, not easy to be understood, students of this kind of problems in the explanation of the teachers can demonstrate by AIDS, line diagram analysis and auxiliary teaching, help students understand and grasp the solving methods.3 for calculating the optimization of teaching. Using the network to quickly, the calculated results can effectively help students improve operation ability.4 the optimization of geometric teaching. Using the courseware help students deepen our understanding of the basic concept of geometrical graph, and guide students to operate, cultivate the students' initial space conception, will get better teaching effect.(2) general requirement of network aided instruction1. With teaching regularity, must be practical teaching network technology and combining. According to the practical, not to use. If the experiment under the two speak taught a lesson and kilograms, if not allow students to use a hand to perceive, have multiple, but only kilograms, the demonstration by courseware is obviously very wrong.2 use modern teaching means, the technical characteristics of itself fully arouse the students' interest in learning.3 reflect the students' subjective, cultivate students' innovation consciousness. To promote students' active participation, prevent individual teacher "performance". If ZhangXinRui teacher speak about the interesting main edition of the graphics, class a lesson is to practice a ship, the rockets chart color, not his teacher on the big screen, but please demonstrate a group of students to discuss first before you control, after besmear is wrong, the computer will correct. The plot of the design is very good, arouse the students' participation in class activities

中文字数: 4712,中文页数: 7 英文为PDF版本,6页 用AT89CX051进行A/D转换ATMEL公司的AT89C1051和AT89C2051单片机具有片上flash，较少引脚数，工作电压范围宽以及一个模拟比较器。这篇文章描述了两种利用AT89C1051和AT89C2051中的模拟比较器构成的低成本A/D转换技术。 RC 数模转换器 这种转换方法具有外围元件数量极少，转换时间短但转换精度低的特点。在以下的例子中，转换结果优于50mv，转换精度有时小于电压的几十分之一，时间小于7ms。 如图1所示，RC A/D转换法仅需要在AT89CX051单片机外围增加两个电阻及一个电容。单片机输出脚（第11脚）输出大约为GND和VCC的电压，对接在内部比较器负输入端（第12脚）的电容进行交替充放电。单片机测量电容上的电压变化到和加在内部比较器正端（第13脚）未知电压相同所需的时间。未知电压是所测量到的时间的函数外文文献以，上回答来自:

Since the 21st century, the human economy has developed high speed, the people live have had the change which changes with each new day, specially computer's application and popularization to economical and social life each domain. Along with the computer in the social life each domain's widespread utilization, the computer virus attack and the guard technology unceasingly is also developing, has brought the huge destruction and the latent threat for the computer system. It is reported that various countries suffer the computer virus infection and the attack event are counted by the 100 million, has disturbed the normal human society life seriously, has brought the huge latent threat and the destruction for the computer network and the system. Along with the computer, the network utilization popularizes unceasingly, thoroughly, will guard against the computer virus to receive various countries to take seriously more and more. In order to ensure system's security and unimpeded, therefore, studies the computer virus the measure to be imminent. This article obtains from computer's characteristic, to come the preliminary discussion to cope with the computer virus the method and the measure. 计算机Computer,、病毒 virus系统安全system safety