Search results
Results From The WOW.Com Content Network
In signal processing and control theory, the impulse response, or impulse response function ( IRF ), of a dynamic system is its output when presented with a brief input signal, called an impulse ( δ (t) ). More generally, an impulse response is the reaction of any dynamic system in response to some external change.
The result is a finite impulse response filter whose frequency response is modified from that of the IIR filter. Multiplying the infinite impulse by the window function in the time domain results in the frequency response of the IIR being convolved with the Fourier transform (or DTFT) of the window function. If the window's main lobe is narrow ...
In statistics, a moving average ( rolling average or running average or moving mean[ 1] or rolling mean) is a calculation to analyze data points by creating a series of averages of different selections of the full data set. Variations include: simple, cumulative, or weighted forms. Mathematically, a moving average is a type of convolution.
Vector autoregression(VAR) is a statistical model used to capture the relationship between multiple quantities as they change over time. VAR is a type of stochastic processmodel. VAR models generalize the single-variable (univariate) autoregressive modelby allowing for multivariate time series.
Transient response. In electrical engineering and mechanical engineering, a transient response is the response of a system to a change from an equilibrium or a steady state. The transient response is not necessarily tied to abrupt events but to any event that affects the equilibrium of the system. The impulse response and step response are ...
In mathematics, a Green's function (or Green function) is the impulse response of an inhomogeneous linear differential operator defined on a domain with specified initial conditions or boundary conditions. This means that if is a linear differential operator, then. the Green's function. G {\displaystyle G}
Infinite impulse response ( IIR) is a property applying to many linear time-invariant systems that are distinguished by having an impulse response that does not become exactly zero past a certain point but continues indefinitely. This is in contrast to a finite impulse response (FIR) system, in which the impulse response does become exactly ...
Wavelet. For the concept in physics, see Wave packet. A wavelet is a wave -like oscillation with an amplitude that begins at zero, increases or decreases, and then returns to zero one or more times. Wavelets are termed a "brief oscillation". A taxonomy of wavelets has been established, based on the number and direction of its pulses.