电子与通信工程专业英语 教学课件 ppt 作者 徐存善 Unit 15
46页1、Unit 15,The Applications of Computers,Electronic and Communication Engineering English,电子与通信工程专业英语,计算机应用,Unit 15 The Applications of Computers,The Applications of Computers,计算机的应用 大多数情况下,人类可以做任何计算机能做的事,但计算机能做得更快、更准确,尽管计算机执行计算与操作时每次只能运行一个步骤。计算机比人更快、更准确,不过与大多数人不同的是必须给它一系列完整的指令以明确在操作中的每一步应该做什么。,For the most part, human beings can do whatever computers can do, but computers can do it with much greater speed and accuracy. This is in spite of the fact that computers perform all their calculations and
2、operations one step at a time. A computer is faster and more accurate than people,but unlike most people it has to be given a complete set of instructions that tell it exactly what to do at each step of its operation.,Text,这一系列的指令称为程序,用于指示计算机每一步要做的工作。这些程序以二进制码的形式储存在计算机存储单元中,每条指令都有独一无二的代码。计算机一次从存储器中取出一条指令代码,并执行代码所指定的操作。,This set of instructions, called a program, is prepared by one or more persons for each job the computer is to do. These programs are placed in the computers memory unit in binary
3、-coded form, with each instruction having a unique code. The computer takes these instruction codes from memory one at a time and performs the operation called for by the code.,Text,Computers have found their way into many application areas that were once not feasible, and the rapid increase in the number and variety of computer applications has made them a significant part of our lives. In the following sections we present examples from some of the major areas of applications.,计算机已进入其从未涉及的应用领域中
4、,其数量的迅速增加及应用的不断变化使其成为我们生活中重要的部分。以下段落中将举例介绍一些计算机主要的应用领域。,Text,Scientific Calculations The earliest computers were created to take the job of scientific calculations which involved complex and difficult mathematics or time-consuming tedious and repetitive, numerical calculations.,科学计算 最早创建计算机是为了执行科学计算,其中包括繁琐复杂的数学计算或耗时冗长及反复大量的计算。,Text,Data Processing Computers have been widely used in data processing, for example, accounting, statistics, and census. The operations involved are very simple-addition,
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