Articles with "multi frequency" as a keyword



Machine‐Learning‐Enabled Multi‐Frequency Synthesis of Space‐Time‐Coding Digital Metasurfaces

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Published in 2024 at "Advanced Functional Materials"

DOI: 10.1002/adfm.202403577

Abstract: Digital metasurfaces based on space‐time coding have established themselves as a powerful and versatile platform for joint spatial/spectral control of electromagnetic waves. However, their advanced design remains a largely open problem with significant computational challenges.… read more here.

Keywords: digital metasurfaces; multi frequency; time coding; space time ... See more keywords

A comparative analysis of square-wave voltammetry and multi-frequency electrochemical Faradaic spectroscopy for kinetic characterisation

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Published in 2024 at "Journal of Solid State Electrochemistry"

DOI: 10.1007/s10008-024-05921-7

Abstract: A rigorous comparison between square-wave voltammetry (SWV) and the recently proposed multi-frequency electrochemical Faradaic spectroscopy (MEFS) is presented for both a quasireversible electrode reaction of a dissolved redox couple at a planar macroscopic electrode and… read more here.

Keywords: spectroscopy; multi frequency; square wave; kinetic characterisation ... See more keywords

An efficient technique for the indirect BEM for multi-frequency acoustic analysis using Green’s function approximation

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Published in 2018 at "Journal of Mechanical Science and Technology"

DOI: 10.1007/s12206-018-0404-5

Abstract: We present an efficient technique for multi-frequency acoustic analysis by the variational indirect boundary element method. The system coefficient matrix of the boundary element method is frequency dependent and requires cumbersome computation in multifrequency acoustic… read more here.

Keywords: technique; frequency; acoustic analysis; multi frequency ... See more keywords
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Multi-frequency SuperDARN radar observations of the modulated ionosphere by high-power radio-waves at EISCAT

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Published in 2020 at "Advances in Space Research"

DOI: 10.1016/j.asr.2020.03.020

Abstract: Abstract This paper presents the first joint observations of multi-frequency SuperDARN (Super Dual Auroral Radar Network) radar of the heated ionosphere by high-power high-frequency (HF) ground-based radio-waves along with the stimulated electromagnetic emissions (SEE) measurements.… read more here.

Keywords: frequency superdarn; frequency; radar; multi frequency ... See more keywords

Detection of multi-frequency weak signals with adaptive stochastic resonance system

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Published in 2018 at "Chinese Journal of Physics"

DOI: 10.1016/j.cjph.2018.04.001

Abstract: Abstract Aiming at the poor detection rate of multi-frequency weak signals under a strong background of noise, a novel method based on adaptive stochastic resonance (SR) theory is proposed in this paper. The optimal parameters… read more here.

Keywords: detection; system; weak signals; multi frequency ... See more keywords

Multi-frequency analysis in a single square-wave chronoamperometric experiment

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Published in 2021 at "Electrochemistry Communications"

DOI: 10.1016/j.elecom.2021.106943

Abstract: Abstract A multi-frequency analysis in a single SW chronoamperometric protocol is proposed, developed from the recently introduced technique termed as electrochemical faradaic spectroscopy (EFS). In the present multi-frequency electrochemical faradaic spectroscopy (MEFS) the potential modulation… read more here.

Keywords: spectroscopy; analysis single; multi frequency; frequency ... See more keywords

Hardy kiwi leaves extracted by multi-frequency multimode modulated technology: A sustainable and promising by-product for industry.

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Published in 2018 at "Food research international"

DOI: 10.1016/j.foodres.2018.06.029

Abstract: Abstract The aim of this study is to evaluate hardy kiwi (Actinidia arguta L.) leaves, a crop waste, as a source of bioactive compounds with potential application in different industries, such as food industry. For… read more here.

Keywords: multimode modulated; industry; frequency multimode; multi frequency ... See more keywords
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Computational image reconstruction for multi-frequency diffuse optical tomography

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Published in 2021 at "Journal of King Saud University - Computer and Information Sciences"

DOI: 10.1016/j.jksuci.2020.12.015

Abstract: Abstract Diffuse optical tomography (DOT) is promising to investigate functional and structural information in biological tissue by involving the forward problem and inverse solution. The work within this study develops an image reconstruction algorithm based… read more here.

Keywords: multi frequency; image reconstruction; frequency; geometry ... See more keywords

Multi-frequency rapid-scan HFEPR.

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Published in 2018 at "Journal of magnetic resonance"

DOI: 10.1016/j.jmr.2018.09.005

Abstract: Gaining access to electron spin dynamics at (sub-)THz frequencies is highly challenging. However, this information is highly relevant for the understanding and development of spin polarization agents in dynamic nuclear polarization methods and single-molecule magnets… read more here.

Keywords: rapid scan; scan hfepr; frequency; multi frequency ... See more keywords

Multi-frequency multi-mode ultrasound treatment for removing pesticides from lettuce (Lactuca sativa L.) and effects on product quality

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Published in 2021 at "Lwt - Food Science and Technology"

DOI: 10.1016/j.lwt.2021.111147

Abstract: Abstract This article presents the efficacy of multi-frequency (20, 40, and 60 kHz) multi-mode ultrasound treatment (MFMU) in sequential and simultaneous combination for the removal of abamectin b1 (AB), alphamethrin (AL), and emamectin benzoate (EB)… read more here.

Keywords: quality; multi frequency; treatment; frequency ... See more keywords
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Effect of multi-frequency parametric excitations on the dynamics of on-board rotor-bearing systems

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Published in 2020 at "Mechanism and Machine Theory"

DOI: 10.1016/j.mechmachtheory.2019.103660

Abstract: Abstract In the transportation domain such as automotive turbochargers and aircraft turbines, the vibrations of on-board rotors are induced not only by the mass unbalance excitation but also by various movements of their support. The… read more here.

Keywords: board; multi frequency; board rotor; rotor ... See more keywords