Articles with "harmonic analysis" as a keyword



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Technical Note: Harmonic analysis applied to MR image distortion fields specific to arbitrarily shaped volumes

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Published in 2018 at "Medical Physics"

DOI: 10.1002/mp.13000

Abstract: PURPOSE Magnetic resonance imaging is expected to play a more important role in radiation therapy given the recent developments in MR-guided technologies. MR images need to consistently show high spatial accuracy to facilitate RT-specific tasks… read more here.

Keywords: image; analysis; harmonic analysis; distortion ... See more keywords
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Identification of evolving interfacial waves by spatial harmonic analysis

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Published in 2017 at "Environmental Fluid Mechanics"

DOI: 10.1007/s10652-016-9506-8

Abstract: This paper is concerned with an analysis of image processing data to identify interfacial waves at the interface between two fluid layers in a laboratory flume. The interfacial waves are excited through a non-linear resonant… read more here.

Keywords: identification evolving; evolving interfacial; analysis; harmonic analysis ... See more keywords
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Harmonic analysis for rank-1 randomised Horn problems

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Published in 2021 at "Letters in Mathematical Physics"

DOI: 10.1007/s11005-021-01429-7

Abstract: The randomised Horn problem, in both its additive and multiplicative version, has recently drawn increasing interest. Especially, closed analytical results have been found for the rank-1 perturbation of sums of Hermitian matrices and products of… read more here.

Keywords: harmonic analysis; rank randomised; horn problems; analysis rank ... See more keywords
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Subdyadic square functions and applications to weighted harmonic analysis

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Published in 2017 at "Advances in Mathematics"

DOI: 10.1016/j.aim.2016.11.018

Abstract: Abstract Through the study of novel variants of the classical Littlewood–Paley–Stein g -functions, we obtain pointwise estimates for broad classes of highly-singular Fourier multipliers on R d satisfying regularity hypotheses adapted to fine (subdyadic) scales.… read more here.

Keywords: subdyadic square; harmonic analysis; functions applications; weighted harmonic ... See more keywords
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Impulse denoising based on noise accumulation and harmonic analysis techniques

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Published in 2020 at "Optik"

DOI: 10.1016/j.ijleo.2020.166163

Abstract: Abstract In the article, we propose a robust impulse denoising method based on noise accumulation and harmonic analysis techniques (NAHAT filter). Noise accumulation technique is used to improve the ability to detect noisy pixels, and… read more here.

Keywords: based noise; accumulation harmonic; harmonic analysis; impulse denoising ... See more keywords
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Mapping properties of fundamental harmonic analysis operators in the exotic Bessel framework

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Published in 2021 at "Journal of Mathematical Analysis and Applications"

DOI: 10.1016/j.jmaa.2021.125061

Abstract: We prove sharp power-weighted $L^p$, weak type and restricted weak type inequalities for the heat semigroup maximal operator and Riesz transforms associated with the Bessel operator $B_{\nu}$ in the exotic range of the parameter $-\infty… read more here.

Keywords: properties fundamental; fundamental harmonic; analysis operators; harmonic analysis ... See more keywords
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Harmonic analysis of surface instability patterns on colloidal particles.

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Published in 2018 at "Soft matter"

DOI: 10.1039/c8sm00383a

Abstract: Wrinkling of colloidal particles alter a wide variety of interfacial properties but quantitative topographical descriptions have been explored experimentally to a very limited extent. In this study, we present a harmonic analysis of surface wrinkles… read more here.

Keywords: analysis surface; harmonic analysis; surface; instability patterns ... See more keywords
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Magneto-optical investigation of scattering by superparamagnetic nanoparticles using multi-harmonic analysis

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Published in 2021 at "AIP Advances"

DOI: 10.1063/9.0000092

Abstract: Magnetic nanoparticles (MNPs) are widely used in imaging, magnetic hyperthermia, drug delivery, etc. We present a continuation of our study of dilute aqueous suspensions of magnetite nanoparticles using an AC Faraday rotation setup. Our previous… read more here.

Keywords: field; analysis; harmonic analysis; nanoparticles using ... See more keywords
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Sound Field Recording Using Distributed Microphones Based on Harmonic Analysis of Infinite Order

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Published in 2018 at "IEEE Signal Processing Letters"

DOI: 10.1109/lsp.2017.2775242

Abstract: A sound field recording method based on spherical or circular harmonic analysis for arbitrary array geometry and directivity of microphones is proposed. In current methods based on harmonic analysis, a sound field is decomposed into… read more here.

Keywords: global origin; harmonic analysis; order; sound field ... See more keywords
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Harmonic Analysis of High-Tc Rf SQUID to Determine the Optimum Working Condition for Its Automatic Application

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Published in 2020 at "IEEE Transactions on Applied Superconductivity"

DOI: 10.1109/tasc.2020.3024209

Abstract: High-Tc radio-frequency (rf) SQUIDs are well researched and have been utilized in a range of applications. The rf SQUID operating in a nonhysteretic mode has been elaborated theoretically in a few of literatures, among which… read more here.

Keywords: optimum working; condition; squid; working conditions ... See more keywords
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Application of Spherical Cap Harmonic Analysis on CHAMP satellite data to develop a lithospheric magnetic field model over southern Africa at satellite altitude

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Published in 2019 at "South African Journal of Geology"

DOI: 10.25131/sajg.122.0012

Abstract: We apply a Spherical Cap Harmonic Analysis technique on CHAMP satellite data recorded over southern Africa between 2007.0 and 2009.0 epochs, and develop a Southern African Lithospheric Magnetic Model (SALMM) at satellite altitude. The comparative… read more here.

Keywords: field; cap harmonic; spherical cap; model ... See more keywords