power spectrum

power spectrum

A plot of the power contained in a signal versus the frequency, or of the power in a spatial distribution versus the wavenumber (reciprocal of wavelength). It may be obtained by taking a Fourier transform of the signal or distribution and squaring the amplitude of each component in the result.

power spectrum

[′pau̇·ər ‚spek·trəm]
(physics)
References in periodicals archive ?
Firstly, we demonstrate that rare events (say, three sigma deviation events) are more strongly correlated than two sigma events for a Gaussian field having the power spectrum measured for Colorado River flows.
recording in duration, pulse repetition rate, power spectrum, pulse rate stability, and oscillations per pulse," they wrote in their analysis.
By semi-deterministic approaches we here refer to approaches that use a single power spectrum density (PSD) or single matrix of power spectra to approximate the original time history load of a particular vehicle.
PBHs therefore provide a potentially powerful additional constraint on the primordial power spectrum, and hence the dynamics of inflation.
A graph of the power spectrum summarizes the observations, showing the temperature deviations, or anisotropics, for every detectable blob size; the graph looks like a mountain range, indicating that the largest peak, or temperature deviation, occurs in the one-degree blobs, with lower peaks at smaller angular sizes.
GSES sessions cover a broad spectrum of topics relating to smart energy solutions, with 3 days of conferences expected to attract over 700 attendees exploring reform patterns across the entire power spectrum. - issacjohn@khaleejtimes.com
Previous research works on improvement of conventional JTC algorithm can be divided into two categories, namely, preprocessing of input images with conventional edge detection methods [12] in spatial domain and joint power spectrum with enhancement , subtraction or binarization methods in frequency domain [16][17].
In order to establish an LED model, experiments and simulations dealing with the relationships between the encapsulants, package structures, performance of the radiation power spectrum, CCT, and chromaticity coordinates must be conducted and the results analyzed.
We compared the ratios of power spectrum data (% power) during and after tDCS and divided this by the data prior to tDCS.
Scalar Power Spectrum. Here we calculate the equation, which satisfies the 3-curvature perturbation R and derives the related power spectrum.
Furthermore, the scale-free dynamics of brain activity can be indexed using the power-law exponent (PLE), that is, the power spectrum with the formula power [varies] 1/frequency [beta], where [beta] is the PLE [1-8].