quasi-positive
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quasi-positive — adj.; quasi positively, adv … Useful english dictionary
Quasi-phase-matching — is a technique in nonlinear optics which allows a positive net flow of energy from the pump frequency to the signal and idler frequencies by creating a periodic structure in the nonlinear medium. Momentum is conserved, as is necessary for phase… … Wikipedia
Quasi-probability distribution — In the most general form, the dynamics of a quantum mechanical system are determined by a master equation an equationof motion for the density operator (usually written rho;) of thesystem. Although it is possible to directly integrate this… … Wikipedia
Quasi-arithmetic mean — In mathematics and statistics, the quasi arithmetic mean or generalised f mean is one generalisation of the more familiar means such as the arithmetic mean and the geometric mean, using a function f. It is also called Kolmogorov mean after… … Wikipedia
Quasi-analytic function — In mathematics, a quasi analytic class of functions is a generalization of the class of real analytic functions based upon the following fact. If f is an analytic function on an interval , and at some point f and all of its derivatives are zero,… … Wikipedia
Quasi-Newton method — In optimization, quasi Newton methods (also known as variable metric methods) are well known algorithms for finding local maxima and minima of functions. Quasi Newton methods are based on Newton s method to find the stationary point of a function … Wikipedia
Wigner quasi-probability distribution — See also Wigner distribution, a disambiguation page. The Wigner quasi probability distribution (also called the Wigner function or the Wigner Ville distribution) is a special type of quasi probability distribution. It was introduced by Eugene… … Wikipedia
Psychologie positive — La psychologie positive est une école de pensée proche des thèmes de la psychologie humaniste et une spécialité de la psychologie orientée vers le développement personnel et le changement social. Un de ses principaux représentants est le… … Wikipédia en Français
Well-quasi-ordering — In mathematics, specifically order theory, a well quasi ordering or wqo is a well founded quasi ordering with an additional restriction on sequences that there is no infinite sequence x i with x i ot le x j for all i < j . Motivation We can use… … Wikipedia
Metzler matrix — In mathematics, a Metzler matrix is a matrix in which all the off diagonal components are nonnegative (equal to or greater than zero) It is named after the American economist Lloyd Metzler. Metzler matrices appear in stability analysis of time… … Wikipedia
