Results 51 to 60 of about 3,299,598 (299)
Analysis of the covariance matrix in FWI through density of covariance maps
CT&F Ciencia, Tecnología & Futuro, 2020 Full waveform inversion (FWI) is a tool for the inversion of seismic data. There are several sources of uncertainty in the results provided by FWI. The quantification of such uncertainties has been studied through the resolution matrix (Res), which rests
Anyeres Neider Jimenez +3 more
doaj +1 more source
An adaptive multiscale algorithm for efficient extended waveform inversion
, 2017 Subsurface-offset extended full-waveform inversion (FWI) may converge to kinematically accurate velocity models without the low-frequency data accuracy required for standard data-domain FWI.
Lei Fu +3 more
core +1 more source
Applied SciencesFull-waveform velocity inversion has long been a primary focus in seismic exploration. Full-waveform inversion techniques employing physics-informed recurrent neural networks (PIRNNs) have recently gained significant scholarly attention.
Cai Lu +5 more
doaj +1 more source
Full‐waveform inversion of the Japanese Islands region [PDF]
Journal of Geophysical Research: Solid Earth, 2016 AbstractWe present a full‐waveform tomographic model of the crust and upper mantle beneath the Japanese Islands region. This is based on the combination of GPU‐accelerated spectral‐element wavefield simulations, adjoint techniques, and nonlinear optimization.
Saulė Simutė +4 more
openaire +4 more sources
Multisource Seismic Full Waveform Inversion of Metal Ore Bodies
, 2021 The seismic exploration method could explore deep metal ore bodies (depth > 1000 m). However, it is difficult to describe the geometry of the complex metal ore body accurately.
Liguo Han +4 more
core +1 more source
Advanced Functional Materials, EarlyView.ABSTRACT Chitosan, a polysaccharide upcycled from biowaste, has long promised sustainable, biocompatible, and antimicrobial films and devices, an appeal reinforced by its recent regulatory recognition, with several chitosan‐based antibacterial dressings gaining clearance through the Food and Drug Administration's 510(k) pathway.
Jacopo Nicoletti +16 more
wiley +1 more source
Constrained Full Waveform Inversion for Borehole Multicomponent Seismic Data
Geosciences, 2019 Full-waveform inversion for borehole seismic data is an ill-posed problem and constraining the problem is crucial. Constraints can be imposed on the data and model space through covariance matrices. Usually, they are set to a diagonal matrix.
Marwan Charara, Christophe Barnes
doaj +1 more source
Full-waveform inversion with Mumford-Shah regularization [PDF]
SEG Technical Program Expanded Abstracts 2018, 2018 Full-waveform inversion (FWI) is a non-linear procedure to estimate subsurface rock parameters from surface measurements of induced seismic waves. This procedure is ill-posed in nature and hence, requires regularization to enhance some structure depending on the prior information.
A.A. Kadu (Ajinkya) +2 more
openaire +5 more sources
Mantle transition zone structure beneath India and Western China from migration of PP and SS precursors [PDF]
, 2014 We investigate the seismic structure of the upper-mantle and mantle transition zone beneath India and Western China using PP and SS underside reflections offseismic discontinuities, which arrive as precursors to the PP and SS arrival.
Dobson, DP +11 more
core +1 more source
Advanced Functional Materials, EarlyView.Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand +13 more
wiley +1 more source