- approximation zéro
- нулевое приближение
Dictionnaire polytechnique Français-Russe. 2013.
approximation zéro
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Zero-based numbering — is numbering in which the initial element of a sequence is assigned the index 0, rather than the index 1 as is typical in everyday circumstances. Under zero based numbering, the initial element is sometimes termed the zeroth element, rather than… … Wikipedia
Zero-differential overlap — is an approximation that is used to ignore certain integrals, usually two electron repulsion integrals, in Semi empirical quantum chemistry methods quantum chemistry molecular orbital methods.If the molecular orbitals mathbf{Phi} i are expanded… … Wikipedia
Zero-phonon line and phonon sideband — The zero phonon line and the phonon sideband jointly constitute the line shape of individual light absorbing and emitting molecules (chromophores) embedded into a transparent solid matrix. When the host matrix contains many chromophores, each… … Wikipedia
Approximation theory — In mathematics, approximation theory is concerned with how functions can best be approximated with simpler functions, and with quantitatively characterizing the errors introduced thereby. Note that what is meant by best and simpler will depend on … Wikipedia
Approximation BKW — Pour les articles homonymes, voir BKW. En physique, l approximation BKW Brillouin[1] Kramers [2] Wentzel[3] est une m … Wikipédia en Français
approximation — In surgery, bringing tissue edges into desired apposition for suturing. steady state a. an assumption in the derivation of an enzyme rate expression in which the rate of change of the … Medical dictionary
Raie zéro-phonon et bande satellite phonon — Figure 1. Représentation schématique du profil d une excitation électronique. La partie étroite à la fréquence ωˈ est la raie zéro phonon, la partie plus large est la bande satellite phonon. Les positions relatives des deux composantes lors d une … Wikipédia en Français
Boussinesq approximation (water waves) — In fluid dynamics, the Boussinesq approximation for water waves is an approximation valid for weakly non linear and fairly long waves. The approximation is named after Joseph Boussinesq, who first derived them in response to the observation by… … Wikipedia
Born-Oppenheimer approximation — In quantum chemistry, the computation of the energy and wavefunction of an average size molecule is a formidable task that is alleviated by the Born Oppenheimer (BO) approximation. For instance the benzene molecule consists of 12 nuclei and 42… … Wikipedia
Diophantine approximation — In number theory, the field of Diophantine approximation, named after Diophantus of Alexandria, deals with the approximation of real numbers by rational numbers. The absolute value of the difference between the real number to be approximated and… … Wikipedia
Stochastic approximation — methods are a family of iterative stochastic optimization algorithms that attempt to find zeroes or extrema of functions which cannot be computed directly, but only estimated via noisy observations. The first, and prototypical, algorithms of this … Wikipedia
