- negative variation
- мат. отрицательная вариация
Большой англо-русский и русско-английский словарь. 2001.
negative variation
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Contingent negative variation — The contingent negative variation (CNV) was one of the first event related potential (ERP) components to be described. The CNV component was first described by Dr. W. Grey Walter and colleagues in an article published in Nature in 1964.[1] The… … Wikipedia
contingent negative variation — (CNV) a small negative potential recorded on an electroencephalogram over the front central scalp of some subjects who perform tasks requiring close attention or who have just received a warning stimulus. Called also E wave and expectancy wave … Medical dictionary
Negative selection (natural selection) — For other uses, see Negative selection (disambiguation). In natural selection, negative selection[1] or purifying selection is the selective removal of alleles that are deleterious. This can result in stabilizing selection through the purging of… … Wikipedia
Negative carbon dioxide emission — A negative carbon dioxide emission or negative emission is a permanent removal of the greenhouse gas carbon dioxide from the atmosphere.[1] It is considered the direct opposite of carbon dioxide emission, hence its name. It is the result of… … Wikipedia
Total variation — As the green ball travels on the graph of the given function, the length of the path travelled by that ball s projection on the y axis, shown as a red ball, is the total variation of the function. In mathematics, the total variation identifies… … Wikipedia
Coefficient of variation — In probability theory and statistics, the coefficient of variation (CV) is a normalized measure of dispersion of a probability distribution. It is also known as unitized risk or the variation coefficient. The absolute value of the CV is sometimes … Wikipedia
Solar variation — Solar variations are changes in the amount of solar radiation emitted by the Sun. There are periodic components to these variations, the principal one being the 11 year solar cycle (or sunspot cycle), as well as aperiodic fluctuations. Solar… … Wikipedia
Non-negative matrix factorization — NMF redirects here. For the bridge convention, see new minor forcing. Non negative matrix factorization (NMF) is a group of algorithms in multivariate analysis and linear algebra where a matrix, , is factorized into (usually) two matrices, and… … Wikipedia
Coefficient de température négative — Thermistance Les principaux capteurs de température utilisés en électronique sont basés sur la loi de variation d’une résistance. Ces éléments ne suivent pas la loi d’Ohm : ce sont des résistances non linéaires. Thermo résistances :… … Wikipédia en Français
Quadratic variation — In mathematics, quadratic variation is used in the analysis of stochastic processes such as Brownian motion and martingales. Quadratic variation is just one kind of variation of a process. Definition Suppose that X t is a real valued stochastic… … Wikipedia
Elegant variation — is a phrase coined by Henry Watson Fowler to refer to the unnecessary use of synonyms to mean a single thing. In Modern English Usage (1926) he wrote:: It is the second rate writers, those intent rather on expressing themselves prettily than on… … Wikipedia
