Results 181 to 190 of about 235,909 (235)
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Wavenumber Analysis of EMIC Waves
Geophysical Research Letters, 2019It has been highly controversial as to whether and how efficient electromagnetic ion cyclotron (EMIC) waves can scatter sub–megaelectronvolt (MeV) to multi–megaelectron volt electrons into the atmospheric loss cone. The capability of EMIC wave scattering
Lunjin Chen, Hui Zhu, Xiao‐jia Zhang
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Journal of Wind Engineering and Industrial Aerodynamics, 2018
Spectral representation method (SRM) is a widely-used tool for the simulation of fluctuating wind speed fields. To circumvent the computational challenges of the Cholesky decomposition involved in the spectral representation method, a wavenumber ...
Yupeng Song +4 more
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Spectral representation method (SRM) is a widely-used tool for the simulation of fluctuating wind speed fields. To circumvent the computational challenges of the Cholesky decomposition involved in the spectral representation method, a wavenumber ...
Yupeng Song +4 more
semanticscholar +1 more source
Geophysics, 2018
We recognized over the years that our conventional surface seismic recording can effectively identify two main features of the earth: its seismic propagation attributes and those attributes resulting in echoes or reflections.
T. Alkhalifah, Bingbing Sun, Zedong Wu
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We recognized over the years that our conventional surface seismic recording can effectively identify two main features of the earth: its seismic propagation attributes and those attributes resulting in echoes or reflections.
T. Alkhalifah, Bingbing Sun, Zedong Wu
semanticscholar +1 more source
Multibaseline TanDEM-X Mangrove Height Estimation: The Selection of the Vertical Wavenumber
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2018We generated a large-scale mangrove forest height map using multiple TanDEM-X (TDX) interferometric synthetic aperture radar (InSAR) acquisitions with various spatial baselines in order to improve the height estimation accuracy across a wide range of ...
Seung-Kuk Lee +4 more
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Wavenumber Integration Techniques
2011The wavenumber integration technique is basically a numerical implementation of the integral transform technique for horizontally stratified media described in Sect. 2.4.1. The field solution is in the form of a spectral (wavenumber) integral of solutions to the depth-separated wave equation.
Finn B. Jensen +3 more
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Full Model Wavenumber Inversion (FMWI)
Proceedings, 2015A model of the Earth can be described using a Fourier basis represented by its wavenumber components. In full waveform inversion (FWI), our ultimate objective is to access all the available model wavenumbers in the recorded data that are not already accurately present in the initial velocity model.
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Wavenumber surfaces of magnetoatmospheric waves
The Physics of Fluids, 1974Small-amplitude wave motion in a gravitationally stratified atmosphere permeated by a magnetic field consists, for each Fourier component with a certain frequency and horizontal wavenumber, of six quasiplane waves. Their mixture varies with height due to the continual interaction among these quasiplane waves. The simultaneous effects of compressibility,
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Recursive wavenumber‐frequency migration
GEOPHYSICS, 1989There are many approaches for migrating seismic data using velocities varying only with depth. These methods are capable of accommodating quasi‐continuous vertical velocity variation at the expense of a considerably larger amount of computation than with the Stolt method, which assumes a constant velocity for the subsurface of the earth.
Y. C. Kim, R. Gonzalez, J. R. Berryhill
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Wavenumber tracking in a low resolution frequency-wavenumber representation using particle filtering
2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014In underwater acoustics, shallow water environments (d
Florent Le Courtois, Julien Bonnel
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Measurement of wavenumber of wall-thinned plate using spatial local wavenumber filtering
PHM Society Asia-Pacific Conference, 2017The surface of a shell-type structure can generate cracks or wall-thinning due to corrosion, etc. Those can eventually lead to the fracture of the structure, which can trigger enormous fatality and property loss. Thereby, a laser imaging technology on such structures as thin plate structureor piping whose thickness is relatively thin in comparison to ...
To Kang +5 more
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