Results 21 to 30 of about 237,467 (314)
A SPECTRAL METHOD FOR DECONVOLVING A DENSITY [PDF]
We propose a new estimator for the density of a random variable observed with an additive measurement error. This estimator is based on the spectral decomposition of the convolution operator, which is compact for an appropriate choice of reference spaces.
Carrasco, Marine, Florens, Jean-Pierre
openaire +3 more sources
Determining and forecasting of environmental influence of telecommunication equipment that is a source of electromagnetic radiation is still an actual challenge.
Oleksandr Naumchuk
doaj +1 more source
Temporal Coherence Estimators for GBSAR
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
Testing equality of spectral densities [PDF]
We develop a test of the hypothesis that the spectral densities of a number m, m ≥ 2, not necessarily independent time series are equal. The test proposed is based on an appropriate L 2 -distance measure between the nonpara- metrically estimated individual spectral densities and an overall, ’pooled’ spectral density, the later being obtained using the ...
Dette, Holger, Paroditis, Efstathios
openaire +4 more sources
Estimating Spectral Density Functions Robustly
We consider in the following the problem of robust spectral density estimation. Unfortunately, conventional spectral density estimators are not robust in the presence of additive outliers (cf. [18]).
Bernhard Spangl , Rudolf Dutter
doaj +1 more source
Background. Application of stability margin of dynamic system, integral estimates of autocorrelation functions and spectra of vibro-acoustic oscillations in machine tools is relevant for evaluation of their dynamic quality and purpose of cutting mode ...
A.A. Ignat'ev +3 more
doaj +1 more source
Energy spectrum and phase diagrams of two-sublattice hard-core boson model
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
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
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
Spectral properties of the generalized diluted Wishart ensemble
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

