求一篇英语科技小论文！！！！

A Flow Shop with Compatibility Constraints in a Steelmaking Plant*

Abstract

We present a scheduling methodology for applications where the generation of schedules is constrained by antagonistic and vague knowledge. Besides temporal and capacity constraints, compatibility constraints between consecutive jobs are managed. We model the vague constraints and uncertain data by fuzzy set theory. The importance of single jobs and the difficulty to schedule them is defined on the different constraints and is used to control the generation of schedules. A preliminary schedule is generated by considering the important jobs and those that are difficult to schedule first. Easy or not so important jobs are scheduled later. Finally, the achieved schedule is “repaired” until a schedule is found that achieves a given level of satisfaction. Since the goodness of solutions is rated by fuzzy sets, robust schedules achieve better evaluations than weak schedules. However, if no robust solution is found constraints will be relaxed. This methodology is appropriate for applications in process engineering where uncertain knowledge is dominant. We explain the methodology with a case study from a steelmaking plant for high-grade steel

流动性约束与铺在炼钢厂*

摘要

我们提出一个调度方法的应用产生的时间表而受到限制对立和模糊的知识。除了时间和能力的限制，兼容性限制之间连续工作的管理。我们模型的模糊和不确定的制约因素数据的模糊集理论。单一的重要性和困难的工作安排次

时间是指在不同的制约因素，是用来控制生成的时间表。初步安排是考虑到所产生的重要的工作和那些有困难的时间表第一。容易或不那么重要的工作计划之后。最后，实现的时间表是“修复” ，直到一个时间表，发现达到某一特定的满意程度。因为善良的解决方案是评价模糊集，强大的时间表实现更好的评价比弱时间表。但是，如果没有强有力的解决办法是找到制约将会放宽。这种方法适合于工程应用过程中在不确定性知识为主。我们解释方法，个案研究从炼钢厂的高档钢材。

但愿能帮到你，希望采纳！

关于科技的英语小论文,一百多字,二百出头就行！要求速度！谢谢~~

When my father was young, he practiced Chinese calligraphy every day and enjoyed Peking Opera with my grandfather on weekends. Now as his daughter, I type in English when communicating with my friends and enjoy surfing on the Internet during holidays. When I enjoy the pleasure and convenience that new technologies have brought me, some people cry out that as technology develops traditional cultures must be lost. Is it true that we cannot have both? Different as my lifestyle is from that of my father, I still believe that the development of technology wont lead to the loss of tradition. On the contrary, it will facilitate the development of traditional cultures. Some people draw the conclusion that technology leads to the loss of tradition because they find nowadays many people,especially the young, take interest in new things like the Internet, thus make less contact with traditional cultures. However,decreased popularity isnt equal to loss. With the development of technology, we have more choices of arts and entertainments. In other words, many new forms of culture are coming into existence, which provide people with more choices rather than threaten the existence of the traditional ones. In actuality, if we look at the tradition itself, we can find that great achievements have been made in many fields with the development of technology.New operas are on show; new researches about history are going on; new facts about historical cities have been found; all of which can prove that technology can stay peacefully with traditions. In fact, technology works far beyond that. The development of technology boosts that of the tradition. On one hand,new technologies make the research for traditional cultures possible as well as provide advanced techniques of reserving historic masterpieces. Take calligraphy as an example, new ways of illumination, which is the fruit of Hi-tech, can prevent the color of scripts from fading. On the other hand, the rapidly developing media such as the Internet and communication satellite provide traditional cultures with a stage to face the whole world. As we can see, after the short piece of ad of Shanghai Expo. , more people will know the beautiful melody of "Jasmine." In addition, if we look back to history, we can find out that it was always in the era when economy developed greatly that cultures prospered the most. No doubt that the development of technology can guarantee that of economy, which eventually influences the prosperity of culture. As we all see, the development of technology brings us richness, making the research and development of cultures affordable brings us more leisure time, making our desire to enjoy ntertainments possible. After all, as the great philosopher Marx aid, "economy determine。

2500~3000字英语小论文

In 2002 will be implemented in three 10 X college entrance examination system. College entrance examination system in the reform of English teaching reforms. The key lies in establishing the class-based teaching system (1) listening and speaking. Against the status quo of poor listening and speaking ability of students to open every Monday of English listening and speaking sections. Use the latest teaching listening "to the future", "traveled the United States," "expect English," and other tapes, video tapes and newspapers, using advanced listening equipment in the classroom teaching through listening, speaking, dialogue, performances, lectures and other lively, interesting students heard about the form of training to improve the communication skills of students, training students in the level of oral expression, reversing the pre-existing "dumb-style" English teaching status quo. (2) the addition of extensive reading classes, the establishment of Foreign Language Reading Room. Although the new textbooks to read the current increased, but far from what is needed. In order to expand the scope of the students exposure to English, optional printing a variety of genres, subjects suitable for students to read the article. According to the requirements of content and reading test, teachers will be articles to classify each article in the post-coupled with an appropriate amount of reading comprehension questions. In order to broaden the teaching of English extension, so that extensive reading in English from the curricular and extra-curricular extension to the establishment of foreign language reading acquisition have been published in a variety of domestic suitable for high school students to read English books, will be in English Extensive Reading from the classroom extended to Yuelan Shi to further stimulate students interest in reading and initiative. Subscribe for students in English newspapers and magazines, the establishment of English specialty health system, at any time to give them an open reading rooms and study rooms. Teaching through extensive reading, students can not only consolidate the textbooks and the basics, but also can improve the self-learning ability to develop intelligence, reading to be fun. (3) The creation of writing classes. Poor writing skills for students in English and Chinese-style English sentences in the written expression of uncommon situation, the school can fully use my existing computer software, according to the new textbooks written request, step by step training on the students writing. "English written expression and training", will be Practical, descriptive text, description text and carry out the purpose of discussion, sub-level guidance training. Writing Course opened for the entrance examination is not merely to prepare for the written expression, but also enable students to learn a variety of English style of writing methods and techniques to meet the future requirements of the community of foreign language experts. (4) The implementation of the different levels of English teaching, the successful introduction of English classes and increase class. Students according to their actual English proficiency, the free selection of the successful lessons to enhance our lessons. School teachers to take a listing. The basis of less successful lessons where students can make up for deficiencies in knowledge and a good grasp of double-base implementation, to develop their own non-intellectual factors, promote the improvement of performance and enjoy the joy of success. The basis of good students can participate in improving the high level of English classes comprehensive training to promote their own standard of English to the "high, precision and advanced the" development and outline the task ahead of schedule to prepare for the contest. 2002年全国将实施3十X高考制度。

高考制度在改革，英语教学改革势在必行。 关键在于建立各课型教学体系 （1）听说课。

针对学生听说能力差的现状，开设每周一节次的英语听说课。选用最新听力教材“走向未来”，“走遍美国”，“希望英语”等录音带，录像带及报纸，利用先进的听音设备，在课堂教学中通过听，说，对话，表演，演讲等各种生动，有趣的形式对学生进行听说训练，提高学生的交际能力，训练学生的口语表达水平，扭转以前存在的“哑巴式”英语教学的现状。

（2）增设泛读课，建立外文阅览室。现行新教材尽管阅读量增加，但远远不能满足需要。

为了扩大学生对英语的接触范围，可选印各种体裁，题材适于学生阅读的文章。根据内容和阅读测试的要求，教师将文章进行分类，在每篇文章后配以适量的阅读理解题。

为了拓宽英语课堂教学的外延，使英语泛读由课。

要一篇科技论文（英文的）

A Flow Shop with Compatibility Constraints in a Steelmaking Plant* Abstract We present a scheduling methodology for applications where the generation of schedules is constrained by antagonistic and vague knowledge. Besides temporal and capacity constraints, compatibility constraints between consecutive jobs are managed. We model the vague constraints and uncertain data by fuzzy set theory. The importance of single jobs and the difficulty to schedule them is defined on the different constraints and is used to control the generation of schedules. A preliminary schedule is generated by considering the important jobs and those that are difficult to schedule first. Easy or not so important jobs are scheduled later. Finally, the achieved schedule is “repaired” until a schedule is found that achieves a given level of satisfaction. Since the goodness of solutions is rated by fuzzy sets, robust schedules achieve better evaluations than weak schedules. However, if no robust solution is found constraints will be relaxed. This methodology is appropriate for applications in process engineering where uncertain knowledge is dominant. We explain the methodology with a case study from a steelmaking plant for high-grade steel 补充： Bidding for the Olympic Games, in a way, an image-creating undertaking. The first and foremost thing is to let people fall in love with the city at first sight, attracting them by its unipue image. What image does Beijing intend to create for itself once it has the opportunity to host the 2008 Olympics? It is known to all that the Beijing Municipal Government has already set the theme for the future games: New Beijing, Great Olympics. For me, the 2008 Olympics will be a great green Olympics illuminated with two more special colors, yellow and red. First, yellow is a meaningful color. The Yellow River is Chinas Mother River and the descendants of the Yellow Emperor. This color has a special origin and great significance for the Chinese people. Beijing is the capital of New China and previously the capital for nine dynasties in Chinese history. So, yellow will naturally add splendor to the 2008 Games. Secondly, the 2008 Olympics will be a red pageant.Red is another traditionally cherished color for the whole country. We adore red. On big occasions, we like to decorate our homes in red. It is the color of double happiness, representing joyous moments, auspiciousness, enthusiasm and prosperity. Red is one of the most suitable colors to describe the future of Beijing . Beijing , together with the whole country, is becoming more and more prosperous in the process of modernization. Should the 2008 Olympics be held in Beijing, the whole city will be a sea of red : the red torch,red flags, red flowers, and the radiant faces of millions of joyful people. Above all, the 2008 Olympics will be a green Olympics. Adding a green ingredient is essential in creating an appealing image, as we cant deny the fact that Beijing, at the moment, is not as green a city as what we like it to be. Striving for an environmentally appealing city has become a central task for all the citizens of Beijing. Big efforts have been made in pollution control, replanting and beautification of the city. According to a project entitled" The Green Olympic Action Plan", between 1998 and 2007, Beijing, we have invested 100 billion RMB in preserving and protecting the environment. Some 12.5 million trees and over 1 million acres of grass will be planted along the Fourth Ring Road. By then, the citys green area will make up 40% of its total. The city will also dredge its reservoirs used as a water supply to Beijing residents, controlling industrial pollution and moving out the 200 factories presently located within the city proper. Certainly, all of this is no easy task. But I am sure that all of us have confidence that we will realize these green goals. For now we have the full support and participation of the environmentally conscious citizens. Each citizen is showing great concern for every one of the steps the city government takes. As the saying goes, United, we stand, and a green Beijing will be achieved. When our aspiration becomes a reality, it will be a unique Olympics." New Beijing, Great Olympics"; will be weaved of these three superb colors: yellow, red and green. 追问： 用中文写清楚 这篇英文文章研究的是什么问题？这个问题是怎么研究的？发现了什么？这些发现意 味着什么？ 谢谢 回答： 第一篇与电有关。

科技小论文怎么写？（350字左右） -

【不倒翁与重心】亲爱的同学，你听说过哥伦布竖鸡蛋的故事吗？哥伦布将鸡蛋打碎才能竖起来，其实，不用打碎也能竖起来，但是大约要花五分钟的时间，真是太麻烦了。

因为重心在三角形的正上方时，鸡蛋才能竖起来。重心不在三角形上方时，鸡蛋就倒下了。

所谓重心，是指物体各部分所受重力的合力的作用点。由此，我们可以想到一个物体，它不但能够站起来，而且怎么推也推不倒。

不用我说，聪明的你肯定会想到，那就是不倒翁。有趣的不倒翁，无论你怎么使劲推它都不会倒，甚至你把它横过来放，倔强的它又会站在你的面前。

不倒翁为什么不会倒下来呢？爸爸跟我做了一个实验，告诉我：一方面，是因为它上轻下重，底部有一个较重的铁块，所以重心很低；另一方面，不倒翁的下半部，都是做成滑滑的球状，当它受力向一边倾斜时，它的重心被提高了，而处于不稳定的状态。在重力的作用下，它向稳定平衡状态的位置运动。

由天惯性，它要来回几次摆动后，最终又停留在原来的位置上。啊！原来我们身边处处有科学，我们一定要多做科学实验，多学科学知识，好好学习，才能造福人类。

写一篇英语800字小论文

In modern society, we tend to become more and more aware of our living environment or physical environment, because we is not clean as before. So many people now choose their house as to its environment but not its location and expenses to afford it. As we all know, the environment pollution is more and more serious during these years, what we could do is to make great efforts in protecting environment gradually. As to government pollution, as to common people. We also try to protect it and make it remain clean. Although we have managed to protect the environment to a certain extent. It is still a very long way to go. The phoenix Mountain is a place of interest. Every day, it welcome a great many visitors. Years ago, a few people didn`t care about environment protection there. For example, waste paper, plastic bags and tins carelessly disposed could be seen everywhere. A few visitors not only killed animals, caught birds, but also picked up flowers and dug trees. What`s more, some of them set fire for cooking in the woods. People showed a real concern over the problem . And fortunately, measures have been taken to deal with the problem. As a result, the environment there has changed. For example, the visitors take away their rubbish. They do not hunt any more. Besides, people protect trees and all kinds of plants. Futhermore, all the tourists bring their food for lnch by themselves in order not to cause fire. Now ,it is more beautiful than before. We must sing high praise for the good deeds. man and environment the world we live in is becoming more and more intolerable because of environmental destruction. bird flu and sars are two typical examples that environmental destruction may threaten our life. besides, forest destruction , water and air pollution result in decrease of planting land and unpleasant weather. serious as the problem seems, we can come up with some measures to deal with it. first of all, the authorities should adopt the policy of “sustainable development”, and laws concerning environmental protection should be put into effect and enforced strictly just as our government has been doing. what s more, every citizen should realize the seriousness of the problem and make concerted efforts to protect our environment. in addition, planting trees helps improve and beautify the environment.。

跪求英语科技演讲论文！！

高科技无处不在When you look the lovable animated cartoon, plays is in a stew humans computer games, rides the fast train, is answering transoceanic telephone time, 。

。Not only your might once realize the science the strength, the science changed this world, also changed our life, the science side us.Opens for the 20th century the grand chapters, not only we discovered the humanity to experience the blood and the fire baptism in these hundred years, has created the innumerable scientific miracles. 19th century France famous science fiction writer of fiction verne fictionalizing, at that time let the human be inconceivable, he fantasized moon landing travel, the airplane, the long-range gun and so on, all 11 became the reality in the 20th century. In the 21st century today, the high tech is ubiquitous.As cross-century one generation, how posture should we adapt the new century by, the load get up the new century heavy burden? Not only science and technology changing with each new day, causes the science to serve for the most advanced technique, also more and more many seeps to during ours daily life, this needs us who is in the young people time to deeply love the science, the study science. Participation science and technology “five small” competition, reading science and technology books, caused me to understand many truths. The precise robot, does not use the fuel the automobile, the hypothesized soccer game, high tech information transmission and so on, each one vivid interesting phenomena, aroused me to explore the science the desire.Our each people all want to study the science, the dissemination civilization, while enjoys the new life, must create the new life, now, the technical product renewal speeds up unceasingly, the visible television, the computer surfer, the pacemaker, already did not calculate was fresh. Vacuum cleaner invented which from 1901, to the artificial earth satellite, carried the human spaceship, the science and technology demonstrates the formidable strength in the different domain. Electronic industry, communication technology daily popularization, nanotechnology, superconductivity material widespread application, soon one day, perhaps in yours dinner table, can appear likely bio-engineering foods and so on outer space green pepper, man-made beefsteak. Studies the science and technology, is not merely in order to become the scientist, also is for can adapt the life, more has been able to become the new century the master, the load gets up the new century, is the national construction, makes the contribution for the human culture.Since new China had been established, our countrys technical development progresses by leaps and bounds, the synthesized insulin, finishes a job plants, the hybrid rice again, explodes atomic bomb and hydrogen bomb, launch satellite and airship and so on, these technical achievement which focuses attention on the common people, reduced our country and the advanced countries science and technology disparity greatly, has poured into the vigor for our countrys modernization. Grandpa Deng Xiaoping said “the science and technology is the first productive forces”, indeed so, the science has inserted the wing for our motherland soaring. Chairman Mao Zedong once said to the youth that, the world was you, also is we, but is your in the final analysis. This speech, has been full of the elders to our earnest expectation. If the elders have constructed the 20th century motherlands with the industrious work, that, we should by the knowledge, get up the new century heavy burden by the scientific load.Schoolmates, we are being at the growth developmental stage, the study science, lets us start since childhood. We must learn each kind of literacy class diligently, because this is all study foundation; At the same time, to each kind the popular science books, the publication which suits our elementary student to look, should better read some in the after school; Also should begin to do each science small experiment, the small manufacture positively, writes the science small paper and so on, raises to the science interest. Long this gets down, we can certainly deeply love the science, has the rich scientific knowledge. Humanitys wisdom is infinite, regardless of is USs Challenger number detonation, the whole world computer virus promotion, always all cannot prevent humanitys advance in technology. “The knowledge is the strength”, Bacon this sentence enjoys great popularity the maxim did not know had driven how many earnestly seeks the knowledge human. Now, lets us also use it to encourage 。