电子信息类专业英语PDF电子书下载

Unit One Optical Fiber Communication 1

Passage A The General System 1

Passage B Advantages of Optical Fiber Communication 6

Passage C Fiber-optics Communication 13

Unit Two Telecommunications 14

Passage A Evolution of Telecommunication Networks 14

Passage B Telecommunications 21

Passage C Telecommunications:a brief historical review 28

Unit Three Data Communications 30

Passage A Data Communications 30

Passage B Characteristics of Communication Channels 33

Passage C Communication Equipment and Software 37

Unit Four Mobile Communications 39

Passage A GSM(Global System for Mobile Communication) 39

Passage B Cellular Mobile Telephone System 43

Passage C The Radio Communication System 47

Passage A Introduction of ISDN 50

Unit Five ISDN 50

Passage B ISDN Multimedia Services 54

Passage C ISDN Evolution and its Benefits 58

Unit Six Multimedia 61

Passage A What Is Multimedia? 61

Passage B Characteristics 65

Passage C Multimedia 71

Passage A Fundamental Concepts 73

Unit Seven Images and Televisions 73

Passage B Compression/Decompression Techniques 76

Passage C Television 79

Unit Eight Auxiliary Storage 81

Passage A CD and CD-ROM 81

Passage B Hard Disks and Optical Disks 84

Passage C Introduction to CD-ROM 87

Unit Nine Microelectronics 89

Passage A Introduction to Microelectronics 89

Passage B The Simple Atom,Conductors,Insulators and Semiconductors 91

Passage C Diode and Transistor 94

Unit Ten Lasers 99

Passage A What is a Laser? 99

Passage B Introduction:Super-tool 102

Passage C Lasers 106

Unit Eleven A Laser Bestiary:Different Types of Lasers 107

Passage A Crystal and Glass Lasers 107

Passage B Liquid Lasers;the Free-electron Laser and the X-ray Laser 111

Passage C Gas Lasers 115

Unit Twelve Database 119

Passage A Database:A Better Way to Manage and Organize Data 119

Passage B DBMS and Data Independence,Integrity,Security 122

Passage C Database System and Three Data Models 126

Unit Thirteen Network 130

Passage A Computer Networks(1) 130

Passage B Computer Networks(2) 133

Passage C Network 138

Passage A Artificial Intelligence 142

Unit Fourteen Artificial Intelligence 142

Passage B Expert Systems and Robotics 146

Passage C Development of AI 150

Unit Fifteen Neural Network 155

Passage A Neural Network Applications 155

Passage B The Issues 158

Passage C Introduction to Neural Networks 161

Unit Sixteen Others(Ⅰ) 163

Passage A Evolution of the Access Network 163

Passage B Intelligent Network Concept 171

Passage C What Is Internet? 176

Unit Seventeen Others(Ⅱ) 181

Passage A Microwave Radio System 181

Passage B Introduction to Broadband Telecommunications 185

Passage C Careers in Electronics 189

Unit Eighteen Others(Ⅲ) 191

Passage A Satellite Fundamentals 191

Passage B ATM 194

Passage C LANs and ATM 199