Results 31 to 40 of about 128,863 (267)

Dispersion curves for the generalized Bernstein modes [PDF]

open access: yesJournal of Plasma Physics, 1973
Dispersion curves are plotted for the extraordinary branch of the electron- and ion-cyclotron harmonic waves propagating perpendicularly to the static magnetic field in a non-relativistic, hot Maxwellian plasma, without invoking the electrostatic approximation.
Puri, S., Leuterer, F., Tutter, M.
openaire   +2 more sources

Automatic Extraction of Surface Wave Dispersion Curves Using Unsupervised Learning and High‐Resolution Tau‐p Transform

open access: yesEarth and Space Science, 2023
Dispersion curves for surface wave recordings are required input for many surface wave inversion methods to image subsurface shear wave velocity distribution, while the conventional extraction of dispersion curves requires significant amount of human ...
Hai Yao   +4 more
doaj   +1 more source

A Multi-Objective Geoacoustic Inversion of Modal-Dispersion and Waveform Envelope Data Based on Wasserstein Metric

open access: yesRemote Sensing, 2023
The inversion of acoustic field data to estimate geoacoustic parameters has been a prominent research focus in the field of underwater acoustics for several decades.
Jiaqi Ding   +3 more
doaj   +1 more source

Backward Acoustic Waves in Piezoelectric Plates: Possible Application as Base for Liquid Sensors

open access: yesSensors, 2023
Backward acoustic waves are characterized by oppositely directed phase and group velocities. These waves can exist in isotropic and piezoelectric plates.
Andrey Smirnov   +4 more
doaj   +1 more source

On the effect of damping on dispersion curves in plates

open access: yesInternational Journal of Solids and Structures, 2013
AbstractThis paper presents a study on quantitative prediction and understanding of time-harmonic wave characteristics in damped plates. Material dissipation is modelled by using complex-valued velocities of free dilatation and shear waves in an unbounded volume. As a numerical example, solution of the classical Rayleigh–Lamb problem for a viscoelastic
MANCONI, Elisabetta, S. Sorokin
openaire   +7 more sources

Numerical Study on Propagative Waves in a Periodically Supported Rail Using Periodic Structure Theory

open access: yesJournal of Advanced Transportation, 2021
This paper presents the numerical study on propagative waves in a periodically supported rail below 6000 Hz. A periodic rail model, which considers the effects of both the periodic supports and the rail cross section deformation, has been established ...
Xi Sheng   +3 more
doaj   +1 more source

Sequential stochastic identification of elastic constants using Lamb waves and particle filters

open access: yesComputer Assisted Methods in Engineering and Science, 2017
Sequential stochastic identification of elastic parameters of thin aluminum plates using Lamb waves is proposed. The identification process is formulated as a Bayesian state estimation problem in which the elastic constants are the unknown state ...
Marek Słoński
doaj   +1 more source

Comparative Study of Dispersion Curves for LAMB Waves Using Analytical Solutions and Semi-Analytical Methods

open access: yesApplied Sciences, 2023
Lamb wave dispersion curves are useful for optimizing the inspection scanning distance that can be covered with good sensitivity in many current applications.
Carlos A. Galán-Pinilla   +4 more
doaj   +1 more source

Band Structures Analysis of Elastic Waves Propagating along Thickness Direction in Periodically Laminated Piezoelectric Composites

open access: yesCrystals, 2018
Existing studies on elastic waves in periodically laminated piezoelectric structures mainly concerned the passive band properties, since the electrical boundaries in the considered structures cannot vary.
Qiangqiang Li   +3 more
doaj   +1 more source

Dispersion points and rational curves [PDF]

open access: yesProceedings of the American Mathematical Society, 2020
We construct two connected plane sets which can be embedded into rational curves. The first is a biconnected set with a dispersion point. It answers a question of Joachim Grispolakis. The second is indecomposable. Both examples are completely metrizable.
openaire   +2 more sources

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