| 单词 | power spectrum |
| 释义 | > as lemmaspower spectrum power spectrum n. Science the distribution of the energy of a waveform among its different Fourier components, esp. as represented graphically. ΘΚΠ the world > matter > physics > electromagnetic radiation > [noun] > range of wavelengths > distribution of energy power spectrum1944 the world > matter > physics > mechanics > types of motion > [noun] > wave > shape, speed, period, length, etc. > distribution of energy of wave-form power spectrum1944 1944 Bell Syst. Techn. Jrnl. 23 282 The second part is devoted principally to the fundamental result that the power spectrum of a noise current is the Fourier transform of its correlation function. 1989 I. Stewart Does God play Dice? ix. 180 A quasiperiodic signal has a power spectrum consisting mostly of sharp spikes. 1995 Sci. Amer. Aug. 51/2 Calculating the so-called power spectrum of this time sequence provided us with a convenient measure of the information content of the switching relative to its own noise. < as lemmas |
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