第8章电子信息类专业英语(李白萍)
《电子信息类专业英语(第二版)第一课
O ptic a l detector
E lectrical re c e i ve r
O ptical fiber com m unication system
D e stina tion
(b)
Figure 1.1 (a) The general communication system; (b) The optical fiber communication system
signal processing is usually performed electrically.
Unit One Optical Fiber Communication
Information source
Transmitter (modulator)
Transmission medium
Communication system
transmission is continued down the ห้องสมุดไป่ตู้ink.
Unit One Optical Fiber Communication
For optical fiber communications system shown in Figure1.1(a) may be considered in slightly greater detail, as given in Figure1.1(b). In this case the information source provides an electrical signal to a transmitter comprising an electrical stage which drives an optical source to give modulation of the lightwave carrier. The optical source which provides the electrical-optical conversion may be either a semiconductor laser or light emitting diode (LED). The transmission medium consists of an optical fiber cable and the receiver consists of an optical detector which drives a further electrical stage and hence provides demodulation of the optical carrier. Photodiodes (p-n, p-i-n or avalanche) and, in some instances, phototransistors and photoconductors are utilized for the detection of the optical signal and the optical-electrical conversion. Thus there is a requirement for electrical interfacing at either end of the optical link and at present the
电子信息类专业英语(第三版)李白萍章 (11)
Unit11 Modern Switching Technique
PassageA The Principles of Digital Switching PassageB Circuit Switching and Packet Switching PassageC ATM
Unit11 Modern Switching Technique
· Multiplexer (MUX). Multiplexer performs the multiplexing of the first order PCM signal. In the case of NEAX61, from the primary multiplexer (PMUX) 120 channels are obtained and from the secondary multiplexer (SMUX) 480 channels are obtained. The primary demultiplexer (PDMUX) and the secondary demultiplexer (SDMUX) perform the opposite operations.
Unit11 Modern Switching Technique
· Central Processor Subsystem. This subsystem performs by stored program control the digit analysis, the control of the speech path for the establishment of a call, the control of the Man-Machine interface, etc.
电子信息类专业英语第五单元译文 李白萍主编
电子信息类专业英语（第二版）李白萍主编第五单元译文第五单元A compact disc (CD) is a laser-read (also termed “optically read”) data storage device on which audio, video, or textual material can be stored. Although it has been used primarily to record stereophonic sound and has supplanted the long-playing PHONOGRAPH record as the principal medium for music storage, it offers a huge potential as the medium for the storage of massive amounts of many types of information.[1]一个光盘（CD）是在其上的音频，视频或文本材料可被存储在激光读取（也称为“光学读取”）数据存储设备。
虽然它被主要用来记录立体声声音，并已经取代了留声机成为了主要的音乐存储媒体，但它作为能存储大量多种信息的媒体仍具有巨大的潜力。
Unlike the conventional phonograph record, the CD stores information in digital form. Stereophonic (two-channel) sound signals are digitally sampled at a rate of 44,100 times per second per channel. Each sample is expressed as a binary number value consisting of 16 binary digits, or bits. The sampled digital values, along with error correction data, tracking codes, and cueing data, are recorded on a digital tape, which is used to make compression-molded plastic discs 12 cm (4.72in) in diameter, each covered by a thin, reflective metallic layer and protected by a clear plastic coating.[2] During playback, a low-powered laser beam reads the digital data through the reflective rear surface of the disk.[1]与传统的照片记录不同，光盘以数字形式存储的信息。
电子信息专业英语课文翻译(部分)
电子信息专业英语课文翻译1. Chapter 1 Introduction to Electronic Technology电子技术简介1.1. Lesson 1 Development of Electronics 电子技术发展史电子技术的历史是一个关于二十世纪的故事，电子学的三个关键元件是真空管、晶体管和集成电路。
真空管也叫做电子管，它是一个密封的玻璃管，在它里面，电子在有真空隔离的电极之间流动。
在20（19×）世纪早期发明了真空管，随着真空管的发明，放大和传输电能成为可能。
电子管的第一应用在于无线电通信。
在第二次世界大战之前，随着越来越多的专门真空管被制造出来用于各种用途，通信技术从而能得到了巨大的进步。
在20世纪20年代时，无线电广播呈天文数字地增长并且成为家庭娱乐的主要来源。
电视机是在1927年发明，并且最终得到了广泛的应用。
电视机作为一种电子设备，其发展得益于在二次世界大战期间雷达上的许多进步。
雷达利用无线电微波回声来测量一个物体的距离和方向，被用于检测飞机和船只。
世界大战之后，电子管被用于开发第一台计算机，但是因为电子元件的尺寸，所以这些计算机是不切实际的。
在1947年，来自贝尔实验室的一组工程师们发明了晶体管，因为发明了晶体管，他们获得了诺贝尔奖。
晶体管的功能类似于真空管，但与真空管相比，它体积小、重量轻、消耗功率低、更加可靠和制造成本低。
在几乎所有的电子设备中晶体管取代了真空管。
在20世纪 50年代时，美国德州仪器公司发展出第一个集成电路。
第一个集成电路仅包含了几个晶体管，在随后的20世纪70年代中期，出现了大规模集成电路和超大规模集成电路。
超大规模集成电路技术允许我们在一个单芯片中构建一个包含有成千上万晶体管的系统。
摄像机、手提电话和个人电脑仅仅是集成电路使之成为可能的一些设备实例。
1.2. Lesson 2 Singapore Polytechnic 新加坡理工学院新加坡理工学院，是新加坡同类学校中的第一家教育机构，创立于1954年，学院着重培养和训练技术人员和专业人员，从而支持新加坡的工业和经济的发展。
电子信息专业英语教学大纲
《电子信息专业英语》课程教学大纲名称：电子信息专业英语一、课程说明1. 课程类别2. 适应专业及课程性质3. 课程目的让学生通过对本课程的学习，能够在今后进入社会工作中运用所学知识，参照电子设备英文说明书进行相关维修。
4. 学分与学时学分学时405．教学重点和难点（1）教学重点在基础英语词汇的基础上掌握与自动化专业知识相关的专业词汇和常用词组，对所选用课本中的重点词汇能正确拼写，英汉互译。
（2）教学难点掌握课程中所涉及科技领域对事物的英语表达方式，能读懂文章所要表达的基本内容，由浅入深、循序渐进的接触一些较新的现代科技信息。
6. 推荐教材或参考书目使用教材：《电子信息类专业英语》2008年11月出版编者：冉利波高等教育出版社参考书：《电子信息类专业英语》2009年02月出版编者：中国高等职业技术教育研究会西安电子科技大学出版社7.课程的要求和任务要求（1）在课程内容教学要求的层次上，按“掌握、了解”两个层次要求。
通过本课程的教学，使学生掌握一定数量的常用现代电子信息专业英语词汇，能够比较熟练地看懂和翻译电工电子的手册、资料和说明书；能够阅读简单的电工电子科普文单元；能根据实际需要查阅相关的英文资料；学习和巩固电工电子专业的基本概念和知识。
（2）教学实践法：整合所学的知识，适当带上一些教学涉及到的电子产品进入课堂，进行实例教学。
任务（1）在高职英语教学的基础上，经过40左右学时的教学，使学生巩固基础知识的同时提高专业词汇的掌握及科技文章的翻译能力。
（2）注重情感教学：以良好的情感状态进行课堂教学，使学生感到和谐、平等和友善的课堂氛围，激发学生积极向上的情绪。
（3）注重培养学生运用英语结合实际进行交流的能力，借助词典阅读和翻译相关英语业务资料的能力，培养学生在涉外交际的日常活动和业务活动中进行简单的口头和书面交流，并为今后进一步提高英语的交流能力打下基础。
8. 考核及成绩评定考核方式：闭卷考试成绩评定：（1）平时成绩占40 %，包括平出勤、听课状态和作业完成情况。
电子信息类专业英语第二版 李白萍主编十七单元译文
电子信息类专业英语第二版李白萍主编第十七单元B译文Passage B Compression/Decompression Techniques压缩/解压缩技术Numerous methods have been developed for the compression of digital image data. One of the principal drivers for this development is the television industry where quality image data must be transferred to receivers using relatively simple equipment. The development of high definition television is further focusing the attention of industry and university scientists toward problems of data reduction and digital transmission. The principal evaluation criteria for the analysis of compressed versus uncompressed imagery is whether a person can tell the difference between the images. A more implemental measure is the Root Mean Square (RMS) error between the original image and the image that has been compressed. Compression rates may be generated by determining the size of the compressed image in terms of number of bits per image pixel for the original image.[1]数字图像数据的压缩的许多方法已经开发出来。
第14章电子信息类专业英语(李白萍)
commercial applications are now underway. Expert systems are being
developed to assist managers with complex planning and scheduling tasks, diagnose diseases, locate mineral deposits, configure complex
corporations are assembling AI departments, venture capitalists are
rushing to invest in entrepreneurial expert systems companies, and expert systems technology is well on its way to commercial success.
Unit Fourteen Artificial Intelligence
Unit Fourteen Artificial Intelligence
Passage A Artificial Intelligence Passage B Expert Systems and Robotics Passage C Development of AI
Unit Fourteen Artificial Intelligence
Expert systems technology will also help American solve its productivity problems. It will help businesses reorganize themselves into more efficient and effective organizations. It will do this by helping individuals solve problems more quickly and efficiently than they can today.
电子信息专业英语(全套课件154P)
7
1.1. Lesson 1 电子技术发展史
New Words and Technical Terms
astronomically available device benefit radar adv. 天文数字地；天体地 adj. 可得到的；可利用的 n. 器件，设备；部件；组件 vt. 有益于，有助于 n. 雷达，电波探测器 n. 钥匙；解答；关键； 键
1.1. Lesson 1 电子技术发展史
Notes to the Text
Development of Electronics
[1] vacuum tube：真空管是一种电子元件，因为参与工作的电极被封装在一个真空的玻璃容器 内，所以被称为真空管。在中国大陆，真空管有时会被称为电子管。在香港和中国广东地区， 真空管有时又会被称作“胆”。 [2] a sealed glass in which electrons flow between electrodes separated by vacuum：in which关系 代词在定语从句中做介词宾语时，由介词 + 关系代词引导定语从句。separated by vacuum过去 分词修饰electrodes。句子可以翻译为：在密封的玻璃管中，电子在由真空隔离的电极间流动。 [3] it became possible to amplify and transmit the electrical energy：it代替不定式to amplify and transmit the electrical energy在句中作形式主语。句子可以翻译为：放大和传送电能成为可能。 [4] radio communication：无线电通信。
[5] as more specialized tubes were made for many applications：as引导状语从句，句子可以翻译 为：随着越来越多的适用于各种用途的专门真空管制造出来。
第1章电子信息类专业英语(李白萍).ppt
Information source
Transmitter (modulator)
Transmission medium C ommunication system
R eceiver (demodulator)
Destination (a)
In fo rm at i o n s o u rce
E l ect ri cal t ran s m i t er
digital information signal. In the system shown in Figure1.1(b) analog modulation involves the variation of the light emitted from the optical source in a continuous manner. With digital modulation, however, discrete changes in the light intensity are obtained (i.e. on-off pulses). Although often simpler to implement, analog modulation with an optical fiber communication system is less efficient, requiring a far higher signal to noise ratio at the receiver than digital modulation.
D es t i n at i o n (b)
Figure 1.1 (a) The general communication system; (b) The optical fiber communication system
最新第18章电子信息类专业英语(第二版)课本-李白萍精品课件
Unit Six Multimedia
Media
Artifacts
Media data
Photographic prints A photograph
(a natural medium) (a natural artifact)
A digital image
Computer display devices
第三页，共49页。
Unit Six Multimedia
So what is multimedia data? Let’s first look at the related notion of media data. McLuhan, in Understanding Media, considers media as “extensions to man”, as technologies and products giving our senses access to further forms of information.[2] This very broad definition encompasses two more specific views. The first relates the term media to how information is conveyed and distributed; for instance, we have print and broadcast media. Second, we also use the term media when describing the materials and forms of artistic expression. This occurs when we speak of digital media, not in the sense of digital storage media, but in the sense of digital counterparts to natural media.