Results 21 to 30 of about 536,565 (302)

Phonon dispersion curves in Cr2AlC single-crystals

open access: yesMaterials Research Letters, 2018
Neutron inelastic scattering is used for the first time to measure phonon dispersion branches in Cr2AlC MAX phase single crystals with appreciable size. Phonon spectra are also calculated within the Density Functional Perturbation Theory (DFPT) framework
A. Champagne   +7 more
doaj   +1 more source

Surf-Net: A deep-learning-based method for extracting surface-wave dispersion curves

open access: yesFrontiers in Earth Science, 2023
Surface wave is an energy-rich component of the seismic wavefield and has been widely employed in understanding underground structures due to its dispersive nature.
Yiran Jiang   +11 more
doaj   +1 more source

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

On the influence of heat transport on low- frequency paramagnetic spin-Lattice relaxation experiments [PDF]

open access: yes, 1974
In low-frequency relaxation experiments on paramagnetic crystals, placed in liquid helium, often dispersion- and absorption curves are found, strongly deviating from those following from the thermodynamic theory of Casimir and Du Pré.
Flokstra, J.   +3 more
core   +3 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

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

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

Retrieving shallow shear-wave velocity profiles from 2D seismic-reflection data with severely aliased surface waves [PDF]

open access: yes, 2019
The inversion of surface-wave phase-velocity dispersion curves provides a reliable method to derive near-surface shear-wave velocity profiles. In this work, we invert phase-velocity dispersion curves estimated from 2D seismic-reflection data.
Carcione, Jose M.   +2 more
core   +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

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