Results 21 to 30 of about 194,801 (292)
Seismic Waveform Inversion Using the Finite-Difference Contrast Source Inversion Method
Journal of Applied Mathematics, 2014 This paper extends the finite-difference contrast source inversion method to reconstruct the mass density for two-dimensional elastic wave inversion in the framework of the full-waveform inversion.
Bo Han +3 more
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Feature Extraction of Music Signal Based on Adaptive Wave Equation Inversion
Advances in Mathematical Physics, 2021 The digitization, analysis, and processing technology of music signals are the core of digital music technology. There is generally a preprocessing process before the music signal processing.
Tianzhuo Gong, Sibing Sun
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Frontiers in Earth Science, 2021 Underground exploitation of georesources can be highly correlated with induced seismic activity. In order to reduce the risk and improve the mining operations safety, the mining activity is monitored by a dedicated seismic network.
Alicja Caputa +2 more
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Femtosecond wave packet spectroscopy: Coherences, the potential, and structural determination [PDF]
, 1993 Recently, we presented a formalism for extracting highly resolved spectral information and the potential of bound isolated systems from coherent ultrafast laser experiments, using I2 as a model system [Gruebele et al., Chem. Phys. Lett. 166, 459 (1990)].
Gruebele, M., Zewail, A. H.
core +1 more source
Full-Wave Verification of an Electromagnetic Inversion Metasurface Design Method [PDF]
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 2020 <pre>This paper summarizes, extends, and synthetically evaluates a method for metasurface design which uses electromagnetic inversion. After the inversion algorithm determines a homogenized surface susceptibility model to implement a desired power pattern, the susceptibility distribution is converted to a three-layer admittance sheet topology ...
Puyan Mojabi, Ziqi Liu, Trevor Brown
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Optimal Inversion Method Based on Joint Waveform Inversion and Least Squares Reverse Time Migration [PDF]
LithosphereJoint Waveform inversion (JWI) uses the results of reflection waveform inversion (RWI) as the initial model for full waveform inversion (FWI). Compared with the FWI, the JWI method can obtain more information about the structure of the subsurface medium.
Kai Zhang +4 more
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Wave Equation‐Based Local Traveltime Inversion
Earth and Space Science, 2020 Full waveform inversion (FWI) is a strongly nonlinear optimization problem, which suffers from cycle skipping when the initial velocity model is not good enough or the seismic data lack low frequencies.
Y. Hu, L. G. Han, Y. S. Liu, Z. Y. Jin
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A Physics-Based Neural-Network Way to Perform Seismic Full Waveform Inversion
IEEE Access, 2020 Seismic full waveform inversion is a common technique that is used in the investigation of subsurface geology. Its classic implementation involves forward modeling of seismic wavefield based on a certain type of wave equation, which reflects the physics ...
Yuxiao Ren +4 more
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Broadband transmission properties of multilayered structures [PDF]
, 2011 The formalism of the scattering matrix is applied to describe the transmission properties of multilayered structures with deep variations of the refractive index and arbitrary arrangements of the layers.
Albuquerque +8 more
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SVD Analysis of Full Wave Inversion [PDF]
, 2014 Full-wave inversion (FWI) is an imaging approach in which we find thequantitative subsurface parameters (such as the dielectric permittivity) whichwould best fit the recorded GPR data. This optimisation problem isnonlinear and ill-posed, and there have been numerous successes inapplying FWI to GPR data.
Watson, F, Lionheart, William RB
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