...计算机辅助制造概论 An Introduction to Computer Aided Manufacturing 郑联语 教授 机械工程及自动化学院 工业与制造系统工程系（720) 办公电话：82317725 电子邮件： lyzheng@buaa.edu.cn 内容提纲 1 制造工程的发展方向——计算机（现代）集成制造 2 制造自动化技术 刚性和柔性的制造自动化 3 制造工程中的 CAD/CAM技术 4 柔性制造系统（FMS） 5 计算机（现代）集成制造系统（CIMS） 北航 机械学院 工业与制造系统工程系 IMSE(720) 郑联语 教授 制造工程的发展方向—CIM 1 制造工程的发展方向——计算机（现代）集成制造 • 20世纪80年代，工业发达国家，相继启动高技术发展计划 – 美国，战略防御计划 – 法国，尤里卡（EURECA）计划 计划内容大体相似，集中在：电子信息、新材料、新能源、生物、新型 生产体系、宇航、海洋等几大方面。 • 1986年3月，我国提出实施高技术研究与发展计划（863计划） 七个领域： 生物工程； 电子信息技术； 激光技术； 航天技术； 自动化技术（包括计算机集成制造、智能机器人两个主题） 新能源； 新材料； 北航 机械学院 工业与制造系统工程系 IMSE(720) 郑联语 教授 计算机集成制造及其技术基础 • 计算机集成制造（CIM, Computer Integrated Manufacturing） （1）目标： 将企业内从产品构思到出厂的各个生产环节的所有活动都置 于计算机的统一管理控制之下，采用各种CAX技术，由网络和数据库建立 联系和资源共享，从而提高企业整体效益，达到综合自动化。 （2）企业效果：20多年来，先后有200多家企业(国内)实施了或正在实施 CIMS取得明显的经济效益和社会效益，同时也面临很大挑战与问题。 如90年代成都飞机、北京一机床、沈阳鼓风机、杭州汽轮机、郑州 纺织、广东华宝、重庆长安等。 （3）教育态势：欧美国家的重要理工科大学大都建立了与CIM有关的研 究所或实验室，大多数大学还开设了CIM相关技术的课程。 • CIM的技术基础是CAD/CAM, 将各种CAX有机集成。 本质是制造自动化。 北航 机械学院 工业与制造系统工程系 IMSE(720) 郑联语 教授 制造自动化技术 2 制造自动化技术 连续流水作业 自始至终流水作业 传感器用于监测或监控 应用综合控制与优化策略 全部实现计算机化的操作 组合机床和自动机床 自动传输装置 局部或全部自动化装配 机器人用于焊接、装配、喷漆 计算机过程监测或监控 数控机床（NC） 计算机数控（CNC） 直接数字控制（DNC） 自适应控制 机器人应用 柔性制造单元或系统（FMC/FMS） 计算机集成制造系统（CIMS） 数控机床（NC） 计算机数控（CNC） 刚性 自动化 大量生产 成批生产 柔性 自动化 单件生产 北航 机械学院 工业与制造系统工程系 IMSE(720) 郑联语 教授 刚性自动化（Fixed Automation） 2.1 刚性自动化（Fixed Automation）——大批量生产自动化 简史： 19世纪70年代出现 （1873年第一台凸轮控制机床）， 1940年后期进入成熟阶段 • 典型模式：美国底特律，福特（Ford）汽车生产线，节拍1辆/分（20年代） 称为福特模式。 长春一汽：奥迪52秒；捷达/宝来38秒(2003)； • 生产形式： 按产品加工或装配过程依次安排设备，由物料运送装置连接起来，...
Words: 1334 - Pages: 6
...Computer virus survey Within the last three years, how many times have you had your computer infected by viruses, spyware, Trojans, or any other type of computer malware? O Never O One time O Two times O Three times O More than three times Do you have a antivirus software installed on your computer? O Yes O No If so which antivirus software are you using? O AVG O Avast O McAfee O Other Do you update your antivirus software frequently? O Yes O No Computer virus survey Within the last three years, how many times have you had your computer infected by viruses, spyware, Trojans, or any other type of computer malware? O Never O One time O Two times O Three times O More than three times Do you have a antivirus software installed on your computer? O Yes O No If so which antivirus software are you using? O AVG O Avast O McAfee O Other Do you update your antivirus software frequently? O Yes O No Computer virus survey Within the last three years, how many times have you had your computer infected by viruses, spyware, Trojans, or any other type of computer malware? O Never O One time O Two times O Three times O More than three times Do you have a antivirus software installed on your computer? O Yes O No If so which antivirus software are you using? O AVG O Avast O McAfee O Other ...
Words: 425 - Pages: 2
...Name: Joel Sanguinetti Title: All About Eve Year: 1950 Director: Joseph L. Mankiewicz Producer: Darryl F. Zanuck Three Performers: Bette Davis, Anne Baxter, George Sanders Costume/Wardrobe: Edith Head, Charles LE Maire, Sam Benson, Josephine Brown, Ann Landers, Merle Williams Hair and Make-up: Ben Nye, Bunny Gardel, Franz Prehoda, Kay Reed, Gene Roemer, Gladys Witten Set and Stage Design: Thomas Little, Walter M. Scott Musical Score Composer: Alfred Newman Cinematographer/Photographer: Milton R. Krasner Screenplay: Joseph L. Mankiewicz Original Novel, Play, or Story: Mary Orr – The Wisdom of Eve Academy Awards (Oscars) Won: 1. Best Actor in a Supporting Role – George Sanders 2. Best Costume Design, Black-and-White – Edith Head & Charles LE Maire 3. Best Director – Joseph L. Mankiewicz 4. Best Picture – 20th Century Fox 5. Best Sound, Recording – 20th Century-Fox Sound Dept. 6. Best Writing, Screenplay – Joseph L. Mankiewicz Joel Sanguinetti Mr. Skillings English 101-B4N December 19, 2011 All About Theatre Theatre has evolved in many ways throughout history. Theatre goes back to the 6th century BCE and develops its origins from Greece. Around 1750, theatre was introduced to New York, and eventually became what we now know as Broadway theatre. All About Eve, directed and written by Joseph L. Mankiewicz, is a movie based on the novel The Wisdom of Eve, written by Mary Orr. All About Eve is a movie about Broadway theatre and the harsh...
Words: 999 - Pages: 4
...Steve Jobs I am going to be telling you about a great man of our time. He was a great business man and inventor. He started from nothing and made it big. Steve Jobs is a hero for the whole world to look up to. He started out as an adopted child worked his way up to being a millionaire. When he was younger he liked the idea of building things and he was interested in computers. Over the years he tried many things and finally ended up going to college (Steve Jobs Encyclopedia Britannica). After a short time he dropped out, in my opinion a bad idea but it seemed to work out for him. He ended up sleeping on his friend’s floor and only had money from turning in bottles (all about Steve Jobs.com). Steve Jobs finally found his calling when he was desperate for money. He took a job at Atari. He learned a lot from Nolan Bushnell the founder of Atari (all about Steve Jobs.com). This is where he got his love for working on computers. He started his company with a friend Woz. To start building the computers that Woz had come up with they sold a VW Van and an hp 65 calculator (all about Steve Jobs.com). Steve came up with the name Apple for the company’s name and they had a friend Ron Wayne help them set up the company. Their first customer was Paul Terrel and he bought 50 computers (all about Steve Jobs.com). After that they started building the computers in Steve’s garage. They started selling them by them self and tried to sell to a company homebrew and got turned down...
Words: 1136 - Pages: 5
...to learn about the amazing things you can make computers do along with that I learnt about the various programs that are being offered in the computer related field. The three lectures delivered during this year that really impressed me were computer graphics by Petro Faloutsos, computer vision and robotics by John Tsotsos and computer security by Hamzeh Roumani. The reason for choosing these three topics is because computer graphics has always been one of my main interests and this lecture gave me a chance to know more about simulation and animation. John Tsotsos talked about his research related to computer vision and robotics because of which I developed an interest in robots and last but not a lecture about computer security in which I learnt new stuff about cryptography. Animating virtual humans is a crucial element of interactive applications according to professor Petro Faloutsos. These applications include medicine, critical situation simulation and interactive applications. He also gave us a little information about his ongoing project on human simulation and modeling. He told us that if we want to simulate a virtual human with high fidelity, we would have to have a layered system which consists of motor control, coordinated level behaviors and expressive facial animations and also mentioned about designing hardware and software accelerators for the physics based simulation. The very talented Professor John told us that his research was based on computer vision...
Words: 543 - Pages: 3
...A device used to save data and instructions which is computer memory. In binary form is the content of memory. In order to carry out all kinds of operations, memory offers input to the processors. Thus, the processors save the results into memory (World of Computing, 2013). The characteristic of computer memory which are electrical characteristics, the manufacturing technology of the device depend on the voltage and current requirements. It is not main concern of the voltage due to most of the semiconductor memory device manipulate at TTL voltage levels. In addition, speed also is the characteristic of computer memory. There is a limit time to delay between the usability of stabilize and accurate of the data on the data lines because of the...
Words: 763 - Pages: 4
...The Effect of a Computer Simulation Activity versus a Hands-on Activity on Product Creativity in Technology Education Kurt Y. Michael Computer use in the classroom has become a popular method of instruction for many technology educators. This may be due to the fact that software programs have advanced beyond the early days of drill and practice instruction. With the introduction of the graphical user interface, increased processing speed, and affordability, computer use in education has finally come of age. Software designers are now able to design multidimensional educational programs that include high quality graphics, stereo sound, and real time interaction (Bilan, 1992). One area of noticeable improvement is computer simulations. Computer simulations are software programs that either replicate or mimic real world phenomena. If implemented correctly, computer simulations can help students learn about technological events and processes that may otherwise be unattainable due to cost, feasibility, or safety. Studies have shown that computer simulators can: 1. Be equally as effective as real life, hands-on laboratory experiences in teaching students scientific concepts (Choi and Gennaro, 1987). 2. Enhance the learning achievement levels of students (Betz, 1996). 3. Enhance the problem solving skills of students (Gokhale, 1996). 4. Foster peer interaction (Bilan, 1992). The educational benefits of computer simulations for learning are promising. Some researchers even suspect...
Words: 1321 - Pages: 6
...of Mac and Pc. Many people pick a computer based on what they are used for to and don’t find the computer that’s right for them. Others don’t find out the facts about each computer and just go with the cheapest because it’s cheap, even though they would be getting a cheap computer it can still be the wrong kind of computer for them, plus it wouldn’t work to their advantage. Before reading this you have to dismiss the ideas you had about Mac’s and Pc’s. If you put aside what you think you know about Pc, and Mac you will understand what computer is best for you. “Mac is a line of personal (PCs) designed, developed, and marketed by Inc. It was initially targeted mainly at the home, education, and creative professional markets. Since the introduction of the Macintosh, the computer has seen significant evolution now making it one of, if not the most powerful general-purpose computers on the market. It now targets the business, science, and law markets as well.” “Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft. Microsoft introduced an operating named Windows on November 20, 1985 as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUI).[4] Microsoft Windows came to dominate the world’s computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984.” The most important part of both computer systems is the cold hard facts between...
Words: 2127 - Pages: 9
...Approval Sheet This thesis entitled “The Effects of Computer-Game Playing to the Academic Performance of the Grade 10 students of Don Bosco College – Basic Education Department High School Level School Year 2015-2016”, prepared and submitted by Syrell B. Almazan, Axl B. Cantil, Jorish B. Del Rosario, and Cyrihl C. Velasquez, in partial fulfillment of the requirements in English X, is hereby recommended for oral examination. Mr. Artell L. Almonte Subject Teacher Approved by the Committee on Oral Examination with a grade of _____. Mrs. Ma. Fatima A. Alarcon Mr. Joseph Christopher DT. Briana Member Member Mrs. Carolina B. Campos Ms. Vilma Rosa R. Dorado Member Member Mrs. Anita V. Maullion Mr. Wally A. Micosa Member Member Mr. Erbert V. dela Resma Chairman Accepted and approved in partial fulfillment of the requirements in English X. Rev. Fr. Regulus M. Porlucas, SDB Principal Date: __________ Acknowledgment Thanks to those teachers who helped us, especially Sir Erbert Dela Resma who gave the formula and Ma’am Joyce Bacuyag for helping us on how to compute the data. Also thanks to the aunt of Cyrihl Velasques for helping us on how to create a thesis Thank you. Dedication We dedicate this research to our Almighty Father for giving us strength in making this thesis. Next, to our beloved teachers and also to our classmates, the Grade 10 Caravario...
Words: 5914 - Pages: 24
...Introduction to Computer Hardware In general, there is very little that you as a future manager need to know about computer hardware, other than some basic vocabulary. The key ideas we want to you understand about hardware are: * Computers are basically simple electronic devices. While what they do may seem magical, very little of the magic comes from the computer itself. In fact computers are limited in what they can do. * More of the magic comes from the software – the set of instructions that tell the computer how to process and display data (and we’ll talk more about that in the following classes). * Most of the magic comes from the way people use the information produced by the computer, and (most importantly) the way they recognize, manage, and overcome the limits of computer-based information. To understand and manage these limitations, you need to have a basic understanding of hardware and software. We can use the systems model (input-process-output) to categorize hardware. There are input devices (e.g., a keyboard) and output devices (e.g. a monitor). We also need to store intermediate and final results of computations, so we need data storage devices (e.g., hard drives). The process is represented by the “processing unit” of the computer (also called a Central Processing Unit or CPU). While it gets a little technical, it is worth understanding how a CPU works, because you need to understand that before you can understand how software works...
Words: 3050 - Pages: 13
...Share this About.com About Tech PC Support . . . Troubleshooting Guides Symptoms How To Fix a Computer That Turns On But Displays Nothing What To Do When Your Computer Starts but The Screen is Black By Tim Fisher PC Support Expert Share this PC Support Categories Troubleshooting Guides How-To's & Tutorials Getting Support Software Tools Hardware Tools Command Line Reference Parts of a Computer Cleaning & Cooling File Extensions Things You Didn't Know About... Computer Terms Other Resources Fix a Problem With Your Computer Maintaining Your Computer Tips & Tricks Updated Articles and Resources Free Email Newsletter Let About.com send you the latest from our PC Support Expert. You can opt-out at any time. Please refer to our privacy policy for contact information. Photo of a Dell UltraSharp U2412M 24-Inch LED Monitor - © Dell, Inc. Dell UltraSharp U2412M 24-Inch LED Monitor. © Dell, Inc. The most common way that a computer "won't turn on" is when the PC actually does power on but doesn't display anything on the monitor. You see lights on the computer case, probably hear fans running from inside, and may even hear sounds, but nothing at all shows up on your screen. There are several possible reasons why your monitor isn't displaying information so it's very important that you step through an ordered process like the one I've outlined here. ...
Words: 2186 - Pages: 9
...Computers have brought about a revolution across all industries. They have changed the face of society. They are no longer specialized tools to be used by specially trained people. They are ubiquitous and used in almost every sphere of life. Computers are the best means for storage and management of data, they can serve as huge knowledge bases and can be harnessed for all sorts of financial transactions owing to their processing power and storage capacities. As computers are a daily utility, they have gained immense importance in day-to-day life. Their increasing utility has made computer education the need of the day. By computer education, we mean, gaining the know-how of the basic concepts related to a computer and gaining the basic knowledge of computer operation. Knowing about the basic components of a computer, the basic concepts behind the use of computers and the know-how of some of the elementary computer applications constitutes computer education. Learning about the computer basics followed by a practical experience of using a computer is the key to computer education. As computers are widely used today, acquiring computer education is the need of the day. Computers are not only storage devices and processing units, but also are excellent communication media. They are the means to access the Internet and get connected to the world. They are also an effective audio-visual media. Computers can be used to access a vast knowledge base and search for information archives...
Words: 530 - Pages: 3
... WEEK 10 8/28/13 Explain computer ethics Computers are special technology and they raise some special ethical issues. In this essay I will discuss what makes computers different from other technology and how this difference makes a difference in ethical considerations. In particular, I want to characterize computer ethics and show why this emerging field is both intellectually interesting and enormously important. On my view, computer ethics is the analysis of the nature and social impact of computer technology and the corresponding formulation and justification of policies for the ethical use of such technology. I use the phrase "computer technology" because I take the subject matter of the field broadly to include computers and associated technology. For instance, I include concerns about software as well as hardware and concerns about networks connecting computers as well as computers themselves. A typical problem in computer ethics arises because there is a policy vacuum about how computer technology should be used. Computers provide us with new capabilities and these in turn give us new choices for action. Often, either no policies for conduct in these situations exist or existing policies seem inadequate. A central task of computer ethics is to determine what we should do in such cases, i.e., to formulate policies to guide our actions. Of course, some ethical situations confront us as individuals and some as a society. Computer ethics includes consideration of...
Words: 1695 - Pages: 7
...Weird Al’s song “It’s All About the Pentiums”, the movie “Live Free or Die Hard” and the poem “Praise Song for the Day” by Elizabeth Alexander each have a common theme that relates to the computer industry in which describing the need to continually advance towards the future. The poem “Praise Song for the Day” was written by Elizabeth Alexander in 2009 as a tribute to President Obama’s inauguration. There is a lot of directions this poem can go, as far as whom it relates to. The main point is that people are here to help out each other. This is a song in the music industry provided by the artist Weird Al Yankovic. This song is a remix of the Puff Daddy song “It’s All About the Benjamins. This “nerdcore hip-hop” song was released on the album “Running with Scissors” in 1999. (Wikipedia, 2012) Lyrics to Weird Al - "It's All About the Pentiums" The action film Live Free or Die Hard was released in 2007 about computer hacking terrorist and the fight against them. Starring Bruce Willis as a NYPD Detective fighting alongside the FBI to stop the cyber attacks in the United States. (Wikipedia, 2012) Elizabeth Alexander, born in 1962, wrote the poem Praise Song for the Day in 2009 in regards to the Obama inauguration. She speaks about how people go about their normal daily business noticing each other. Everyone is fixing and/or creating something, all while talking with each other in different ways and thinking about what one has said. We...
Words: 2543 - Pages: 11
...this paper I will choose to write about buying a computer. I will explain the factor that causes the supply and the demand in buying a certain computer. Next I will give two substitutes for the computer that could be used instead of this type of computer. I will give two complements about the type of computer and the programs that were on it. The last thing that will be written about is the necessity of my computer and the impact of the price elasticity. Decision Making When choosing to buy a computer I that it had to have certain programs on the computer so that I may get the task at hand completed. The First thing that was done was too decided in buying the computer is what kind did I want and need. What type of programs would I need on the computer and if the programs cost more than I had? These are just some of the factors that I had to decide on what computer that I really wanted and needed for the task that I had to do. The factor that I had to look at also was what they had at the store that I went to. The next factor that I had was to consider what all I was going to do with this computer. The actors that were shown to me is the different types of programs on each computer and how much each computer memory had. The last factor for the computers were was how long each warranty was so that I could get my money back if something went wrong. The last factor that I had to choose on was deciding the brand on the computer and if it was going to be wireless...
Words: 899 - Pages: 4
