Full-model wavenumber inversion: An emphasis on the appropriate wavenumber continuation [PDF]
Geophysics, 2016 A model of the earth can be described using a Fourier basis represented by its wavenumber content. In full-waveform inversion (FWI), the wavenumber description of the model is natural because our Born-approximation-based velocity updates are made up of ...
Alkhalifah, Tariq Ali
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Frequency Aliasing-Based Spatial-Wavenumber Filter for Online Damage Monitoring
Shock and Vibration, 2020 The spatial-wavenumber filter method can extract the specific mode of the Lamb wave, thereby distinguishing the incident wave and the damage reflection wave. This method has been widely studied for damage imaging.
Bin Liu +3 more
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Dispersion Compensation Method for Lamb Waves Based on Measured Wavenumber
Shock and Vibration, 2020 In this study, a delta wavenumber dispersion compensation (∆K-DC) method was developed and applied, not only with the theoretical wavenumber but also with the measured wavenumber.
J. Li, Y. Han
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WAVENUMBER TRACKING IN A LOWRESOLUTION FREQUENCY-WAVENUMBER REPRESENTATION USING PARTICLE FILTERING
2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014 International audienceIn underwater acoustics, shallow water environments (d < 200 m) act as dispersive waveguide when considering lowfrequency sources (f < 250 Hz), and propagation is described by modal theory.
Le Courtois, Florent, Bonnel, Julien
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A wavenumber independent boundary element method for an acoustic scattering problem [PDF]
, 2006 In this paper we consider the impedance boundary value problem for the Helmholtz equation in a half-plane with piecewise constant boundary data, a problem which models, for example, outdoor sound propagation over inhomogeneous. at terrain.
Langdon, S., Chandler-Wilde, S. N.
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Complex Wavenumber Rossby Wave Ray Tracing [PDF]
This paper presents a methodology for performing complex wavenumber ray tracing in which both wave trajectory and amplitude are calculated. This ray-tracing framework is first derived using a scaling in which the imaginary wavenumber component is assumed
Shaman, Jeffrey +2 more
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Dispersive properties of high order nedelec/edge element approximation of the time-harmonic Maxwell equations [PDF]
, 2004 The dispersive behaviour of high-order Næ#169;dæ#169;lec element approximation of the time harmonic Maxwell equations at a prescribed temporal frequency ω on tensor-product meshes of size h is analysed.
Ainsworth, Mark
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Asymptotic statistics for wavenumber estimation [PDF]
ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 The use of an array of sensors for determining the properties of propagating waves is of considerable importance in many applications. For example, in radar and sonar, an array of sensors is used to determine the spectral content and spatial coordinates of targets.
Gingras, D., Hobbs, S.
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Nonlinear disturbance evolution in a two-dimensional boundary layer along an elastic plate and induced radiated sound [PDF]
, 2010 The interaction between a boundary-layer flow and an elastic plate is addressed by direct numerical simulation, taking into account the full coupling between the fluid flow and the flexible wall.
EHRENSTEIN, Uwe +5 more
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Spatiotemporal dynamics of high-wavenumber turbulence in a basic laboratory plasma [PDF]
, 2022 0000-0002-5222-6082High-spatial resolution observation of high-wavenumber broadband turbulence is achieved by controlling the magnetic field to be relatively low and measuring with a azimuthally arranged multi-channel Langmuir array in a basic laboratory
YAMADA, Takuma +20 more
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