专业外语与文献检索(原课程为《专业外语》)

毕克玲

目录

  • 1 网络英语17级
    • 1.1 网络英语-科技文献翻译技巧及注意事项
    • 1.2 UNIT 0 -A brief history of communications
      • 1.2.1 课程讲解
      • 1.2.2 视频
    • 1.3 Unit1 Computer Basic
      • 1.3.1 课程讲解
      • 1.3.2 视频
    • 1.4 Unit2 a Simple of Data communications: Asynchronous Serial Data Transmission
      • 1.4.1 课程讲解
      • 1.4.2 视频
    • 1.5 unit 3 the ISO Networking Standards
      • 1.5.1 课程讲解
      • 1.5.2 视频
    • 1.6 Unit 4 the TCP/IP Reference model
      • 1.6.1 课程讲解
      • 1.6.2 视频
    • 1.7 Unit 5 Networking Devices(1)
      • 1.7.1 课程讲解
      • 1.7.2 视频
    • 1.8 Unit 6 Networking Devices(2)
      • 1.8.1 课程讲解
      • 1.8.2 视频
    • 1.9 Unit 7 Data Flow through Networks
      • 1.9.1 课程讲解
      • 1.9.2 视频
    • 1.10 UNIT 8 Physical Layer：Communications Media
      • 1.10.1 课程讲解
      • 1.10.2 视频
    • 1.11 Unit 9 Physical Layer: connection Strategies
      • 1.11.1 课程讲解
      • 1.11.2 视频
    • 1.12 UNIT 10 Data Link Layer：Ethernet
      • 1.12.1 课程讲解
      • 1.12.2 视频
    • 1.13 Unit 10-2(补)Database and Database System
      • 1.13.1 课程讲解
      • 1.13.2 视频
    • 1.14 UNIT 11 Network Layer
      • 1.14.1 课程讲解
      • 1.14.2 视频
    • 1.15 UNIT 11-2 python introduction
      • 1.15.1 课程讲解
      • 1.15.2 视频
    • 1.16 UNIT 12 Internet Addressing and DNS
      • 1.16.1 课程讲解
      • 1.16.2 视频
    • 1.17 UNIT 13 IPv 4和IPv 6
      • 1.17.1 课程讲解
      • 1.17.2 视频
    • 1.18 UNIT 14 Wireless Local Area Network
      • 1.18.1 课程讲解
      • 1.18.2 视频
    • 1.19 UNIT 15 WORLD WIDE WEB
      • 1.19.1 课程讲解
      • 1.19.2 视频
    • 1.20 UNIT 16 FireWall
      • 1.20.1 课程讲解
      • 1.20.2 视频
    • 1.21 UNIT 16-2 Computer Virus
      • 1.21.1 课程讲解
      • 1.21.2 视频
    • 1.22 UNIT 16-3 The Basic of Screaming Technology
      • 1.22.1 课程讲解
      • 1.22.2 视频
    • 1.23 UNIT 17 Mobile Internet
      • 1.23.1 课程讲解
      • 1.23.2 视频
    • 1.24 UNIT 18 IOT Technology
      • 1.24.1 课程讲解
      • 1.24.2 视频
    • 1.25 UNIT 18-2 Electronic Business Introduction
      • 1.25.1 课程讲解
      • 1.25.2 视频
    • 1.26 UNIT 18-3 Big Data Introduction
      • 1.26.1 课程讲解
      • 1.26.2 视频
    • 1.27 UNIT 18-4 Data Mining Introduction
      • 1.27.1 课程讲解
      • 1.27.2 视频
  • 2 Part1 Thesis Writing on Science and  Technology
    • 2.1 科技论文的写作
  • 3 unit 1 Computer Network Basics(网络工程)
    • 3.1 lesson ppt
  • 4 Unit 2 The Physical Layer（网络工程）
    • 4.1 lesson ppt
  • 5 Unit 3  The Data Link Layer
    • 5.1 lesson ppt
  • 6 Unit 4 The Network Layer（网络工程）
    • 6.1 lesson ppt
  • 7 Unit 5  The Transport Layer（网络工程）
    • 7.1 lesson ppt
  • 8 Unit 6  The Application Layer （网络工程）
    • 8.1 lesson ppt
  • 9 Unit 7  Network Security（网络工程）
    • 9.1 lesson ppt
  • 10 Unit 8  The New Network Technology（网络工程）
    • 10.1 lesson ppt
  • 11 Part 1 English for Science and Technology-01 English for Science and Technology(2015版)
    • 11.1 Characteristics of English for Science and Technology
    • 11.2 科技英语的翻译
    • 11.3 翻译方法与技巧
    • 11.4 科技文章参考文献目录与摘要的书写
  • 12 Part II  Electronic Information--Electrical technique(2015版)
    • 12.1 Passage A  Binary System and Logic Systems
      • 12.1.1 video
    • 12.2 Passage B  Analog Circui
      • 12.2.1 video
    • 12.3 Passage C  Introduce digital circuit
      • 12.3.1 video
  • 13 Microelectronics
    • 13.1 Passage A  Introduction to Microelectronics
      • 13.1.1 video
    • 13.2 Passage B  The Simple Atom, Conductors, Insulators and Semiconductors
      • 13.2.1 video
    • 13.3 assage C  Diode and Transistor
      • 13.3.1 video
  • 14 3  Computer Architecture
    • 14.1 Passage A  Wonderful Structure of a Microcomputer
      • 14.1.1 video
    • 14.2 Passage B  Hardware and Software of Microcomputer
      • 14.2.1 video
    • 14.3 Passage C  the Application of Computer
  • 15 Computer Storage
    • 15.1 Passage A  Main Memory
      • 15.1.1 video
  • 16 Electronic Communication
    • 16.1 Electronic Communication
      • 16.1.1 video
    • 16.2 Passage B  What is Bluetooth?
      • 16.2.1 video
    • 16.3 Passage C  What is Wi-Fi?
      • 16.3.1 video
    • 16.4 Passage D  ZigBee
      • 16.4.1 video
  • 17 Part III  Chip Technologies(2015版)
    • 17.1 Passage A  Common Chip 74HC00
      • 17.1.1 video
    • 17.2 Passage B  Embedded Chips AT89C52
      • 17.2.1 video
  • 18 Part IV  Computer Retrieval
    • 18.1 the Process Knowledge of Computer Retrieval
      • 18.1.1 video
    • 18.2 Information Retrieval on the Internet
    • 18.3 Retrieval Tools
      • 18.3.1 video
  • 19 Unit 1 Wonderful Structure of a Microcomputer(2013版）
    • 19.1 Words
    • 19.2 Abbreviations
    • 19.3 Contents
    • 19.4 Exercises
    • 19.5 VIDEO
  • 20 Unit 2 Hardware and Software of Microcomputer(2013版)
    • 20.1 Words
    • 20.2 Abbreviations
    • 20.3 Contents
    • 20.4 Exercises
    • 20.5 VIDEO
  • 21 Unit 3 the Application of Computer(2013版)
    • 21.1 Words
    • 21.2 Abbreviations
    • 21.3 Contents
    • 21.4 Exercises
    • 21.5 VIDEO
  • 22 Unit 4 Today's Offices(2013版)
    • 22.1 Words
    • 22.2 Abrreviations
    • 22.3 Contents
    • 22.4 Exercises
    • 22.5 VIDEO
  • 23 Unit 5 Multimedia Technique of Computer(2013版)
    • 23.1 Words
    • 23.2 Abbreviations
    • 23.3 Contents
    • 23.4 Excercises
    • 23.5 VIDEO
  • 24 Unit 6 What is Bluetooth?(2013版)
    • 24.1 Words
    • 24.2 Abbreviations
    • 24.3 Contents
    • 24.4 Exercises
    • 24.5 VIDEO
  • 25 Unit 7 Memory Devices(2013版)
    • 25.1 Words
    • 25.2 Abbreviations
    • 25.3 Contents
    • 25.4 Exercises
    • 25.5 VIDEO
Contents

                Unit 6 What is Bluetooth?

Bluetooth is a universal radio interface inthe 2.45GHz frequency band that enables portable electronic devices to connectand communicate wirelessly via short-range, ad hoc networks. Each unit cansimultaneously communicate with up to sever other units per piconet. Moreover,each unit can simultaneously belong to several piconets.

What is Bluetooth Technology？

Bluetooth technology which apart from Ericssonhas gained the support of Nokia, IBM, Toshiba, Intel and many othermanufacturers eliminates the need for wires, cables and connectors for and betweencordless or mobile phones, modems, headsets, PDAs, Computers, printers,projectors, local area networks, and so on, and paves the way for new andcompletely different devices and applications. Technology Characteristics

l  1Ms/ssymbol rate exploits maximum available channel bandwidth

l  Fastfrequency hopping avoids interference

l  Adaptiveoutput power minimizes interference

l  Short datapackets maximize capacity during interference

l  Fastacknowledge allows low coding overhead for links

l  CVSD (ContinuousVariable Slope Delta Modulation) voice coding enables, Operation at high bit-error rates

l  Flexiblepacket types support wide application range

l  Airinterface tailored to minimize current consumption

Basic Technical Information

l  Based upona small, high performance integrated radio transceiver, each of which isallocated a unique 48-bit address derived from the IEEE 802·standard.

l  Operate inthe unrestricted 2.45GHz ISM free band, Which is available globally althoughslight variation of location and width of band apply

l  Range setat 10m to optimize for target market of mobile and business user

l  Gross datarate 1Mbit/s with second generation plans to increase to 1Mbit/s

l  One-to-oneconnections allow maximum data transfer rate of 721kbit/s (3 voice channels)

l  Usespacket switching protocol based on frequency hop scheme with 1600 hops/s toenable high performance in noisy radio environments .The entire availablefrequency spectrum is used with 79 hops of 1Mhz bandwidth ,  analogous to the IEEE 802.11 standard

l  Low powerconsumption longevity for battery powered devices. During data transfer themaximum current drain is 30mA. However during pauses or at lower data rateswill be lower