“fraction”的概念、定义、翻译、参考文献-科学参考

fraction

Mathematics

The fraction a/b, where a and b are positive integers, was historically obtained by dividing a unit length into b parts and taking a of these parts. The number a is the numerator and the number b is the denominator. It is a proper fraction if a<b and an improper fraction if a>b. Any fraction can be expressed as c + d/e, where c is an integer and d/e is a proper fraction, and in this form it is called a mixed number. For example, $3 \frac{1}{2}$ is a mixed fraction (equal to 7/2). See also compound fraction, continued fraction, simple fraction.

Science and Technology

1. (mathematics) A part of a whole, expressed as a ratio of the number of equal parts into which the whole has been divided. If the whole is divided into three equal parts (fractions), for instance, one of those fractions would be expressed as the ratio ⅓ and two of them as ⅔.
2. (chemistry) A quantity extracted from a sample by a process of fractionation, commonly by heating the sample to boil off its ingredients in order of their volatility and collecting each of them by distillation.
Mike Allaby

Chemistry

See fractional distillation.

Computer

Another name for rational number. Numbers represented in floating-point notation are necessarily fractional.

单词	fraction
释义	fraction Mathematics The fraction a/b, where a and b are positive integers, was historically obtained by dividing a unit length into b parts and taking a of these parts. The number a is the numerator and the number b is the denominator. It is a proper fraction if a<b and an improper fraction if a>b. Any fraction can be expressed as c + d/e, where c is an integer and d/e is a proper fraction, and in this form it is called a mixed number. For example, $3 \frac{1}{2}$ is a mixed fraction (equal to 7/2). See also compound fraction, continued fraction, simple fraction. Science and Technology 1. (mathematics) A part of a whole, expressed as a ratio of the number of equal parts into which the whole has been divided. If the whole is divided into three equal parts (fractions), for instance, one of those fractions would be expressed as the ratio ⅓ and two of them as ⅔. 2. (chemistry) A quantity extracted from a sample by a process of fractionation, commonly by heating the sample to boil off its ingredients in order of their volatility and collecting each of them by distillation. Mike Allaby Chemistry See fractional distillation. Computer Another name for rational number. Numbers represented in floating-point notation are necessarily fractional.
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