“characteristic function”的概念、定义、翻译、参考文献-科学参考

单词	characteristic function
释义	characteristic function [´kar·ik·tǝ`ris·tik `fǝŋk·shǝn] ^MATHEMATICS 1. The function χ_A defined for any subset A of a set by setting χ_A = (x ) = 1 if x is in A and χ_A = (x ) 0 if x is not in A. Also known as indicator function. 2. See <<eigenfunction>> ^PHYSICS A function, such as the point characteristic function or the principal function, which is the integral of some property of an optical or mechanical system over time or over the path followed by the system, and whose value for a path actually followed by a system is a maximum or a minimum with respect to nearby paths with the same end points. ^STATISTICS A function that uniquely defines a probability distribution; it is equal to √(2π) times the Fourier transform of the frequency function of the distribution.
随便看	cross bracing crossbreed cross-cap cross-color cross compiler cross-correlation cross-correlation detection cross-correlation function cross-correlator cross-country mill cross-coupling crosscurrent crosscurrent extraction cross curve crosscut crosscut file crosscut saw crosscutting relationships cross drum boiler crossed belt crossed cylinder crossed electrophoresis crossed-field accelerator crossed-field amplifier crossed-field backward-wave oscillator

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