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spectral structure

См. также в других словарях:

  • Structure formation — refers to a fundamental problem in physical cosmology. The universe, as is now known from observations of the cosmic microwave background radiation, began in a hot, dense, nearly uniform state approximately 13.7 Gyr ago. [cite journal |author=D.… …   Wikipedia

  • Spectral music — (or spectralism) refers to a musical composition practice where compositional decisions are often informed by the analysis of sound spectra. Computer based sound spectrum analysis using a Fast Fourier transform is one of the more common methods… …   Wikipedia

  • Spectral sequence — In the area of mathematics known as homological algebra, especially in algebraic topology and group cohomology, a spectral sequence is a means of computing homology groups by taking successive approximations. Spectral sequences are a… …   Wikipedia

  • Spectral density estimation — In statistical signal processing, the goal of spectral density estimation is to estimate the spectral density (also known as the power spectrum) of a random signal from a sequence of time samples of the signal. Intuitively speaking, the spectral… …   Wikipedia

  • Spectral glide — A spectral glide is a modification of the vowel quality of a tone (Erickson 1975, p.72). Since the vowel quality of a tone is determined by the overtones, spectrum, or timbre (all three terms being near equal) of that tone, a spectral glide is a… …   Wikipedia

  • spectral band structure — spektrinės juostos sandara statusas T sritis fizika atitikmenys: angl. spectral band structure vok. Spektralbandstruktur, f rus. структура полосы спектра, f pranc. structure de bande spectrale, f …   Fizikos terminų žodynas

  • structure de bande spectrale — spektrinės juostos sandara statusas T sritis fizika atitikmenys: angl. spectral band structure vok. Spektralbandstruktur, f rus. структура полосы спектра, f pranc. structure de bande spectrale, f …   Fizikos terminų žodynas

  • Adams spectral sequence — In mathematics, the Adams spectral sequence is a spectral sequence introduced by Adams (1958). Like all spectral sequences, it is a computational tool; it relates homology theory to what is now called stable homotopy theory. It is a… …   Wikipedia

  • Eilenberg-Moore spectral sequence — In mathematics, in the field of algebraic topology, the Eilenberg Moore spectral sequence addresses the calculation of the homology groups of a pullback over a fibration. The spectral sequence formulates the calculation from knowledge of the… …   Wikipedia

  • Fine-structure constant — The fine structure constant or Sommerfeld fine structure constant, usually denoted alpha ,, is the fundamental physical constant characterizing the strength of the electromagnetic interaction.It is a dimensionless quantity, and thus its numerical …   Wikipedia

  • hyperfine structure — /huy peuhr fuyn , huy /, Physics. the splitting of the lines of an atomic spectrum, produced by the angular momentum of the nucleus of the atom. Cf. fine structure. [1925 30; HYPER + FINE1] * * * ▪ physics       in spectroscopy, the splitting of… …   Universalium

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