The Wasserstein distance and the L2 metric together form an adversarial loss function. The parallel-layer model and the SEAM model are used to verify the benefits of the proposed method and its performance in the face of seismic data lack low-frequency components and noise interference. Numerical...
Full waveform inversion (FWI) is a seismic imaging method with a unified mathematical framework based on wave equation constraints. The FWI method can be used to generate a variety of high-resolution seismic parameter models (e.g., velocity, anisotropy, viscoelasticity, and attenuation), which can...
It is necessary either to include some prior model of the skull within the starting model before attempting to recover the brain, or to use an advanced form of FWI such as AWI that can converge toward the correct answer from a simple starting model. To account correctly for and remove the...
Full-waveform inversion (FWI) is a high-resolution inverse technique to reconstruct the elastic properties of the subsurface by iterative minimization of the difference between modeled and observed seismograms. The method does not require the identification of seismic phases in the data or the extractio...
(2006) proposed early-arrival waveform tomography (EWT), which used a time window on the seismic data to form the early-arrival wavefield. On the other hand, the frequency-domain FWI (FDFWI) is a natural multi-scale method, as the seismic data have already been decomposed into separate ...
We demonstrate our solution on a full-azimuth (FAZ) survey acquired in the Gulf of Mexico using dual-sensor streamers and blended sources in the form of simultaneous long-offsets (SLO). The dual-sensor acquisition provides low-frequency data, while the SLO configuration enables the recording of...
Instead, it was intended to be an idealized form of WFU that could be possible in a future “post-suppression” wildfire management paradigm. The assumption that WFU could make suppression more effective under extreme weather conditions is contingent upon the idea that suppression resources stay the...
The inversion method also incorporates the unknown time offset between signal transmission and start of recording at the receiver as a model parameter that is recovered simultaneously with the material slowness. The resolution of FWI approaches the diffraction limit of one half wavelength, but at a ...
(Vigh & Starr,2008). The highly nonlinear and ill-posed FWI problem requires imposing some prior information of the model in the form of regularization terms for the misfit evaluation. Otherwise, the local optimization algorithm will become trapped in a local minimum instead of converging towards...
The standard GN system for multisource multireceiver FWI is reformulated into an equivalent matrix equation form, with the solution becoming a diagonal matrix rather than a vector as in the standard system. The search direction is transformed from a vector to a matrix by relaxing the diagonality...