- negative covariance
- мат. отрицательная ковариация
Большой англо-русский и русско-английский словарь. 2001.
negative covariance
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Covariance — A measure of the degree to which returns on two risky assets move in tandem. A positive covariance means that asset returns move together. A negative covariance means returns move inversely. One method of calculating covariance is by looking at… … Investment dictionary
Covariance — Pour le principe physique, voir Principe de covariance générale. Ne pas confondre avec la covariance d un tenseur en algèbre ou en géométrie différentielle, ou d un foncteur en théorie des catégories. En théorie des probabilités et en… … Wikipédia en Français
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covariance — co·var·i·ance (ko vārґe əns) [co + variance] in statistics, a measure of the tendency of two random variables to vary together: the expected value of the product of the deviations of corresponding values of the variables from their… … Medical dictionary
Matérn covariance function — In statistics, the Matérn covariance (named after the Swedish forestry statistician Bertil Matérn[1]) is a covariance function used in spatial statistics, geostatistics, machine learning, image analysis, and other applications of multivariate… … Wikipedia
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Multivariate normal distribution — MVN redirects here. For the airport with that IATA code, see Mount Vernon Airport. Probability density function Many samples from a multivariate (bivariate) Gaussian distribution centered at (1,3) with a standard deviation of 3 in roughly the… … Wikipedia
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Principal component analysis — PCA of a multivariate Gaussian distribution centered at (1,3) with a standard deviation of 3 in roughly the (0.878, 0.478) direction and of 1 in the orthogonal direction. The vectors shown are the eigenvectors of the covariance matrix scaled by… … Wikipedia
Kalman filter — Roles of the variables in the Kalman filter. (Larger image here) In statistics, the Kalman filter is a mathematical method named after Rudolf E. Kálmán. Its purpose is to use measurements observed over time, containing noise (random variations)… … Wikipedia
CMA-ES — stands for Covariance Matrix Adaptation Evolution Strategy. Evolution strategies (ES) are stochastic, derivative free methods for numerical optimization of non linear or non convex continuous optimization problems. They belong to the class of… … Wikipedia
