second-order smoothing

См. также в других словарях:

• Smoothing spline — The smoothing spline is a method of smoothing, or fitting a smooth curve to a set of noisy observations.DefinitionLet (x i,Y i); i=1,dots,n be a sequence of observations, modeled by the relation E(Y i) = mu(x i). The smoothing spline estimate… …   Wikipedia

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• Thin plate spline — This is a brief derivation for the closed form solutions for smoothing Thin Plate Spline . Details about these splines can be found in (Wahba, 1990).Thin plate splines (TPS) were introduced to geometric design by Duchon (Duchon, 1976). The name… …   Wikipedia

• Low-pass filter — A low pass filter is a filter that passes low frequency signals but attenuates (reduces the amplitude of) signals with frequencies higher than the cutoff frequency. The actual amount of attenuation for each frequency varies from filter to filter …   Wikipedia

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• Heat equation — The heat equation is an important partial differential equation which describes the distribution of heat (or variation in temperature) in a given region over time. For a function of three spatial variables ( x , y , z ) and one time variable t ,… …   Wikipedia

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