英语词汇“mass function”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

mass function

/ˈmas ˌfʌŋ(k)ʃn/

Mathematics and Astronomy

noun

1Chiefly Astronomy. A function involving relationships of mass; specifically (a) a relationship used to determine the masses of the two stars of a spectroscopic binary when only the spectrum of one star (m ₁) can be observed, namely (m ₂ 3 sin3 i)/(m ₁ + m ₂)2, where m ₁ and m ₂ are the star masses and i is the inclination of the orbit; (b) an expression describing the number of objects per unit volume in different ranges of mass, for a group of stars, galaxies, etc.

2 Mathematics. In full probability mass function. A function giving the probability that a discrete random variable will take a specific value.

Origin

1920s. From mass + function.

单词	mass function
释义	mass function /ˈmas ˌfʌŋ(k)ʃn/ Mathematics and Astronomy noun 1Chiefly Astronomy. A function involving relationships of mass; specifically (a) a relationship used to determine the masses of the two stars of a spectroscopic binary when only the spectrum of one star (m ₁) can be observed, namely (m ₂ 3 sin3 i)/(m ₁ + m ₂)2, where m ₁ and m ₂ are the star masses and i is the inclination of the orbit; (b) an expression describing the number of objects per unit volume in different ranges of mass, for a group of stars, galaxies, etc. 2 Mathematics. In full probability mass function. A function giving the probability that a discrete random variable will take a specific value. Origin 1920s. From mass + function.
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