The search space of full-waveform inversion (FWI) can be extended via a relaxation the wave equation to increase linear regime inversion. This wave-equation is implemented by solving jointly (in least-squares sense) weighted penalty parameter and observation such that reconstructed wavefields closely match data, hence preventing cycle skipping at receivers. Then, subsurface parameters are updat...

This study considers the full waveform inversion (FWI) method based on asymptotic solution of Helmholtz equation. We provide frequency-dependent ray tracing to obtain wave field used compute FWI gradient and calculate modeled data. With a comparable quality inverse problem as applied standard finite difference approach, speed calculations in is an order magnitude higher. A series numerical expe...

Full waveform inversion (FWI) in transversely isotropic media usually requires abundant a priori information, like well data and smoothness assumptions, to make the FWI converge to a plausible solution. The proper model parameterization in transversely isotropic (TI) media with a vertical symmetry axis (VTI) can alleviate some of these limitations. Considering the limitations of our field data ...

The French West Indies (FWI), i.e., the islands of Martinique and Guadeloupe, have recently experienced the emergence of multiple sclerosis (MS). This epidemiological upheaval followed a return migration of the FWI population that had previously migrated to continental France. The prevalence MS was 14.8/10(5) (95% CI: 11.9-17.7) on Dec. 31, 1999 and its mean annual incidence was 1.4/10(5) (95% ...

[1] The evaluation of the relationship between satellitederived vegetation indices (normalized difference vegetation index and normalized difference water index) and soil moisture improves our understanding of how these indices respond to soil moisture fluctuations. Soil moisture deficits are ultimately tied to drought stress on plants. The diverse terrain and climate of Oklahoma, the extensive...

The increase in the worldwide demand for dairy products, associated with global warming, will emphasize the issue of water use efficiency in dairy systems. The evaluation of environmental issues related to the management of animal dejections will also require precise biotechnical models that can predict effluent management in farms. In this study, equations were developed and evaluated for pred...

This paper concerns the Time-Domain Full Waveform Inversion (FWI) for dispersive and dissipative poroelastic materials. The forward problem is an initial boundary value (IBVP) of equations with a memory term; FWI formulated as minimization least-square misfit function constraint. In this paper, we derive adjoint problem, whose solution can be applied to computed direction steepest descent in it...

This paper is devoted to theoretical and numerical investigation of the local minimum issue in seismic full waveform inversion (FWI). provides a mathematical analysis optimal transportation (OT) type objective function's differentiability proves that gradient obtained adjoint-state method does not depend on particular choice Kantorovich potentials. A novel approach using softplus encoding prese...

Full waveform inversion (FWI) is an appealing seismic data-fitting procedure for the derivation of highresolution quantitative models of the subsurface at various scales. Full modelling and inversion of viscoelastic waves from multiple seismic sources allow for the recovering of different physical parameters, although they remain computationally challenging tasks. An efficient massively paralle...

Forest fires are a major environmental issue, creating economical and ecological damage while endangering human lives. Fast detection is a key element for controlling such phenomenon. To achieve this, one alternative is to use automatic tools based on local sensors, such as provided by meteorological stations. In effect, meteorological conditions (e.g. temperature, wind) are known to influence ...