Results 61 to 70 of about 3,297,474 (208)

Challenges and Opportunities in Multi‐Method Integrated Geophysical Prospection of Buried Building Remains at the Sanctuary of Olympia

Archaeological Prospection, Volume 33, Issue 3, Page 731-744, July/September 2026.
ABSTRACT Ancient Olympia was one of the most important sanctuaries and the venue for the Olympic Games in Greek and Roman times. Its remains are located in the Olympia Terrace (Peloponnese, Greece) at the present‐day confluence of the rivers Alpheios and Kladeos at the base of Mount Kronos.
Sarah Bäumler, Dennis Wilken, Peter Fischer, Lena Slabon, Timo Willershäuser, Birgitta Eder, Hans‐Joachim Gehrke, Erofili‐Iris Kolia, Franziska Lang, Oliver Pilz, Andreas Vött   +10 more
wiley   +1 more source

Full Wavefield Reconstruction and Full Waveform Inversion

, 2021
Two-way reverse time extrapolation of the recorded seismic data is the essential step in seismic reverse time migration (RTM). Various RTM algorithms have been developed to produce accurate image locations rather than correct amplitude information ...
Wu, Yulang
core  

The CRESCENT Generation 0 Cascadia Community Velocity Model: Constraints From the Joint Inversion of Teleseismic Receiver Functions and Ambient Noise Data

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract The Cascadia subduction zone can produce M9+ megathrust and M6.5+ intraplate earthquakes, motivating the need for a detailed 3‐D model of seismic properties at scales relevant to regional geology, basins, and infrastructure. To construct the Generation 0 Cascadia Region Earthquake Science Center Community Velocity Model (CRESCENT CVM), we ...
Bin He, Jonathan R. Delph, Shihan Wu, Emilie E. E. Hooft, Alex Grant, Valerie J. Sahakian, Pieter‐Ewald Share, William J. Stephenson, Erin A. Wirth, Brandon Herr, Ross Maguire, Guoliang Li, Rasheed Ajala   +12 more
wiley   +1 more source

Full Wavefield Reconstruction and Full Waveform Inversion

, 2020
Two-way reverse time extrapolation of the recorded seismic data is the essential step in seismic reverse time migration (RTM). Various RTM algorithms have been developed to produce accurate image locations rather than correct amplitude information ...
Wu, Yulang
core   +1 more source

Full-Waveform Inversion of Two-Parameter Ground-Penetrating Radar Based on Quadratic Wasserstein Distance

Remote Sensing
Full-waveform inversion (FWI) is one of the most promising techniques in current ground-penetrating radar (GPR) inversion methods. The least-squares method is usually used, minimizing the mismatch between the observed signal and the simulated signal ...
Kai Lu, Yibo Wang, Heting Han, Shichao Zhong, Yikang Zheng   +4 more
doaj   +1 more source

Multiple Scattering Suppression in Heterogeneous Media: High‐Precision Imaging of Sleeve Grouting Defects Based on Elastic Reverse Time Migration

Engineering Reports, Volume 8, Issue 6, June 2026.
This study proposes an elastic wave reverse time migration (RTM) method to suppress multiple scattering noise in heterogeneous concrete. By effectively utilizing scattered wavefields, RTM enables high‐precision, robust imaging of sleeve grouting defects in prefabricated buildings, significantly outperforming traditional algorithms.
Yong Lu, Li Tian, Sheng Yuan, Jing Zhang
wiley   +1 more source

DLM-FWI: deep learning matching filtering for full waveform inversion

Geophysical Journal International
SUMMARY Full waveform inversion (FWI) is a popular method for subsurface parameter estimation. Despite its effectiveness in building high-resolution velocity models, the quality of the inversion result is significantly dependent on a fairly accurate, smooth initial model, which is often challenging to build.
Chao Li, Sergey Fomel, Yangkang Chen
openaire   +1 more source

WaveInsight: A Source-Independent Full Waveform Inversion Application for Seismic Modeling

JGEET: Journal of Geoscience, Engineering, Environment and Technology
Full Waveform Inversion (FWI) is a key method in seismic exploration due to its ability to generate high-resolution subsurface velocity models. However, its success is highly dependent on the accuracy of the source wavelet, an incorrect wavelet ...
Asido Saputra Sigalingging, Ignatius Sonny Winardhi, Handoyo   +2 more
doaj   +1 more source

Neural network with signal parameters featuring for near‐surface velocity model building

Near Surface Geophysics, Volume 24, Issue 3, Page 289-299, June 2026.
Abstract This study presents a method that integrates spectral recomposition (SR) with a neural network to improve near‐surface seismic analysis. The approach incorporates SR‐derived wavelet‐timing attributes into a fully convolutional network (FCN) to enhance the characterization of shallow subsurface structures. Field evaluation was conducted using S‐
Nelson Ricardo Coelho Flores Zuniga
wiley   +1 more source

Square-Root Variable Metric Based Elastic Full Waveform Inversion and Its Uncertainty Estimation

, 2018
The issue of uncertainty estimation is important to full waveform inversion (FWI) but still left behind. In our research, we apply a quasi-Newton method name Square-Root Variable Metric (SRVM) to FWI.
Liu, Q., Peter, Daniel, Q. Liu, D. Peter
core   +1 more source