文档介绍：Computer English
Chapter 3 Number Systems and Boolean Algebra
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Key points: useful terms and definitions of Number system and Boolean Algebra Difficult points: Conversion of the Number Systems and Boolean Algebra
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计算机专业英语
Requirements:
1. Concepts of Number System and their conversion
2. Boolean Algebra
3. Moore’s Law
4. 科技英语中数学公式的读法
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计算机专业英语
New Words & Expressions:
hexadecimal ; radix , 基数
octal ; alphabet
fractional , 小数的 whole number
remainder significant figure
quotient algorithm n. 补码,余角 carry
Number Systems
Abbreviations:
Binary-coded hexadecimal (BCH) 二进制编码的十六进制
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计算机专业英语
The use of the microprocessor requires a working knowledge of binary, decimal, and hexadecimal numbering systems. This section provides a background for those who are unfamiliar with number systems. Conversions between decimal and binary, decimal and hexadecimal, and binary and hexadecimal are described.
Number Systems
使用微处理器需要掌握二进制、十进制和十六进制数制系统的基本知识,本节为那些不熟悉数制系统的读者提供这方面的背景知识。说明了十进制与二进制之间、十进制与十六进制之间,及二进制与十六进制之间的转换。
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计算机专业英语
Before numbers are converted from one number base to another, the digits of a number system must be understood. Early in our education, we learned that a decimal, or base 10, number was constructed with 10 digits: 0 through 9. The first digit in any numbering system is always a zero. For example, a base 8 (octal) number contains 8 digits: 0 through 7; a base 2 (binary) number contains 2 digits: 0 and 1.
Digits
将数从—种数制向另一种数制转换之前,必须了解数的计数系统。在早期教育中,我们已学习了十进制数,或以10为基的数,它由10个数字组成:0到9。任何计数制的第一个数字总是零,这种规则适用于任何其他数制。例如,以8为基的数(八进制)包含8个数字:0到7,而以2为基的数(二进制)包含2个数字:0和 l。
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计算机专业英语
If the base of a number exceeds 10, the additional digits use the letters of the alphabet, beginning with an A, For example, a base 12 number contains 12 digits: 0 through 9, followed by A for 10 and B for 11, Note that a base 10 number does not contain a 10 digit, just as a bas