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信息与通信工程专业科技英语ppt模板

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  • 关键提要:工学
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这是一个关于信息与通信工程专业科技英语ppt模板,主要介绍人为错误和系统故障、系统设计中,人的因素和人机关系、如何消除人为因素对系统问题的不利影响、计算机工业如何吸取其他工业的成功经验。欢迎点击下载哦。

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信息与通信工程专业科技英语ppt模板 信息与通信工程专业科技英语ppt模板

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Technical English
For Information and Communication Engineering
2016/12/27
Unit Eighteen
Human Error and Computer System Design
概述
人为错误和系统故障
系统设计中,人的因素和人机关系
如何消除人为因素对系统问题的不利影响
计算机工业如何吸取其他工业的成功经验
结合课文的思考题
How do human errors cause system failure?
What can we do to avoid problems due to human errors in important projects such as space mission?
What is the practice in aviation industry in learning lessens of major accidents?
Can the computer industry learn something from other industries?
Exercises
Theoretically a transmitter should only transmit electric signals and a receiver should only receive signals. Yet this hardly ever happens in the ordinary laboratory because a piece of electronic equipment can either transmit or receive electric energy.
理论上发射机应该只发射电信号,而接收机只接收信号。可是在普通的实验室中几乎从来不是这样,因为任何电子设备总是既能发出电能,又能接收电能。
Exercises
Consequently, electronic equipment is constantly subjected to unwanted signals, and is constantly producing energy that adjacent equipment is not designed to accept. This is the basic problem of electromagnetic compatibility. The electronic equipment must operate in conjunction with other equipment without causing malfunction or degradation of operation of any of the associated equipment.
因此,电子设备总是受到不希望有的信号影响,同时又总是产生一些附近设备不能接受的能量。这就是电磁兼容的主要问题。电子设备必须与其他设备协同工作,而不会使任何相关设备工作失常或性能下降。
Exercises
An ideally designed piece of equipment should not radiate any unwanted energy; nor should it be susceptible to any unwanted energy. To accomplish this, a medium would have to enclose the equipment so that unwanted energy either leaving or attempting to enter the equipment is effectively attenuated.
一台设计得好的设备不应该辐射任何不希望有的能量,也不应该受到任何不该有的能量的影响。为了实现这一目标,必须有一个媒介将设备包围起来,使得离开或进入该设备的不想要的能量被有效地衰减。
Exercises
The term (coding) in the digital context can refer to several processes. For example, we may think in terms of making the message unintelligible to unauthorized users, or alternatively, the conversion of a simple binary signal to another digital form more suitable for transmission.
在数字意义上这一术语可以指好几种过程。例如我们可以把它看作使信息不能被未经授权的用户所理解,或者是将一个简单的二进制信号转换为另一种更适合于传输的形式。
Exercises
Here we shall consider only the simple coding structures and mechanisms that are required to represent a particular analog value digitally. There are many different types of coding mechanisms, and to simplify our analysis it is useful to classify them.
这里我们将只考虑用数字形式表示一个特定模拟值的简单编码结构和机制。有许多不同类型的编码机制,为了简化我们的分析,将它们分类是有益的。
Exercises
Since the step size is constant throughout the permitted amplitude range, the signal is said to be uniformly quantized.
     A. designated  B. allowed   C. permanent  D. assigned
The amplitudes of the harmonics of the message signal are virtually unattenuated at the high frequency.
    A. nearly  B. normally  C. factually  D. slightly
Exercises
There is a one-to-one correspondence between every instruction in an assembly language program and its equivalent machine language program.
     A. similarity  B. correlation  C. efficiency  D. identification
The results of this analysis were then compared with the specification, and an error was usually indicated between them.
     A. requirement  B. special aspect 
     C. implication   D. simplification
Exercises
The second section describes quantization schemes that take account of the characteristics of speech.
     A. techniques  B. systems  C. mechanisms  D. principles
The approach differs from classical synthesis and design in that no formal design technique other than network analysis is required.
    A. strategy  B. road  C. scheme  D. idea
Exercises
The system capacity, or rate of information transmission through a communication system, is related to the rapidity with which signals may change with time.
     A. complexity  B. rate  C. clarity  D. quickness
The system impairments, other than quantization error, that may occur in practical equipment are then discussed.
     A. rather than  B. besides   C. as well as  D. except
Exercises
They are like the jumper manufacturer who discovers that it is more economical to mould jumpers, in one operation, from a wonderful new plastic, which looks and feels just like wool.
     A. take jumpers into shape  B. give a shape to jumpers
     C. shape jumpers by using a mould    D. model jumpers
The third section describes quantization schemes that take account of the characteristics of speech.
    A. consider   B. make use of  C. count  D. compute

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《信息与通信工程专业科技英语ppt模板》是由用户huangliling于2016-12-27上传,属于高校大学PPT。

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