Results 31 to 40 of about 5,734,459 (326)

Temporal Coherence Estimators for GBSAR

open access: yesRemote Sensing, 2022
Many Ground-Based Synthetic Aperture Radar (GBSAR) applications demand preliminary analysis to select areas with high-quality signal. That is, areas in which the phase can be processed to extract the desired information. The interferometric coherence and
Alessandra Beni   +3 more
doaj   +1 more source

Energy spectrum and phase diagrams of two-sublattice hard-core boson model

open access: yesCondensed Matter Physics, 2013
The energy spectrum, spectral density and phase diagrams have been obtained for two-sublattice hard-core boson model in frames of random phase approximation approach.
I.V. Stasyuk, O. Vorobyov
doaj   +1 more source

Construction of estimates of spectral densities with a given accuracy over intersecting intervals of observations

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2019
The article proposes a new method for determining the number of splitting intervals and the number of observations in them when building estimates of the spectral densities of stationary random processes with a given accuracy over intersecting ...
Natalia V. Semenchuk
doaj   +1 more source

Spectral density of individual trajectories of an active Brownian particle

open access: yesNew Journal of Physics, 2022
We study analytically the single-trajectory spectral density (STSD) of an active Brownian motion (BM) as exhibited, for example, by the dynamics of a chemically-active Janus colloid. We evaluate the standardly-defined spectral density, i.e.
Alessio Squarcini   +2 more
doaj   +1 more source

Simulation and experimental development of a temperature control system of a radiation calibration source based on a PID-regulyator

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2017
Improvement of methods of radiometric correction for multichannel spectral hardware and wide usage of LED-sources require the development of both mathematical and experimental methods of calibration of the obtained spectral data.
V. V. Volkov
doaj   +1 more source

Dynamic Features of Spectra of Single and Quasi-Periodic Measuring Signals

open access: yesПриборы и методы измерений, 2022
Solving the problems of spectral processing of single and quasi-periodic signals in measurement and diagnostic systems is directly related to their isolation against the background of external interference or noise.
U. V. Suchodolov   +2 more
doaj   +1 more source

Spectral properties of the generalized diluted Wishart ensemble

open access: yesJournal of Physics: Complexity, 2022
The celebrated Marčenko–Pastur law, that considers the asymptotic spectral density of random covariance matrices, has found a great number of applications in physics, biology, economics, engineering, among others.
Isaac Pérez Castillo
doaj   +1 more source

Complex quantum networks as structured environments: engineering and probing [PDF]

open access: yes, 2016
We consider structured environments modeled by bosonic quantum networks and investigate the probing of their spectral density, structure, and topology. We demonstrate how to engineer a desired spectral density by changing the network structure.
Galve, Fernando   +4 more
core   +2 more sources

Spectral density of the Dirac operator in two-flavor QCD [PDF]

open access: yes, 2014
We compute the spectral density of the (Hermitean) Dirac operator in Quantum Chromodynamics with two light degenerate quarks near the origin. We use CLS/ALPHA lattices generated with two flavours of O(a)-improved Wilson fermions corresponding to ...
G. Engel   +3 more
semanticscholar   +1 more source

Dynamics of hindered CF3-rotor in 2,5-bis (trifl uoromethyl )-nitroben zene radical -anion in anhydro us DMF. A temperature - activation theory of reversible HFS transformations of EPR spectrum

open access: yesТонкие химические технологии, 2016
The temperature dependence of EPR spectrum of 2,5-bis(trifluoromethyl)nitrobenzene radical anion in anhydrous DMF was investigated. Internal dynamics of hindered rotation of the CF3-group in ortho-position to NO2-group causes HFS modulation. The spectrum
E. A. Polenov, P. V. Melnikov
doaj   +1 more source

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