Results 101 to 110 of about 3,297,474 (208)

Multi‐Method Structural Investigation of the Schneiderberg–Baalberge Burial Mound (Saxony‐Anhalt, Germany) Including Seismic Full‐Waveform Inversion (FWI)

Archaeological Prospection
ABSTRACTThe construction history and subsequent usage of burial mounds are an important testimony for socio‐economic transformation in prehistoric societies. The Baalberge–Schneiderberg burial mound, subject of the presented study, falls in this category as it is considered as an important monument that indicates the emergence of early social ...
Manuel Zolchow, Daniel Köhn, Dennis Wilken, Ercan Erkul, Stefan Dreibrodt, Natalie Pickartz, Erica Corradini, Johannes Müller, Wolfgang Rabbel   +8 more
openaire   +1 more source

Advanced velocity modeling and imaging of rock mass in hydraulic tunnels with high efficiency and accuracy

Yantu gongcheng xuebao
The accurate calculation of the P-wave velocity information of the rock mass in front of the tunnel face and the accurate imaging of the adverse geological structures are the key to improve the accuracy of the advanced geological prediction of tunnels ...
DONG Shiqi 1, ZHOU Liming 1, FU Daiguang 1, ZHANG Yang 1, DONG Xintong 2, ZHONG Tie 3
doaj   +1 more source

Soil water content estimation by using ground penetrating radar data full waveform inversion with grey wolf optimizer algorithm

Vadose Zone Journal
Soil water content (SWC) estimation is important for many areas including hydrology, agriculture, soil science, and environmental science. Ground penetrating radar (GPR) is a promising geophysical method for SWC estimation.
M. H. Zhang, X. Feng, M. Bano, C. Liu, Q. Liu, X. Wang   +5 more
doaj   +1 more source

MS_ATpV-FWI: Full Waveform Inversion based on Multi-scale Structural Similarity Index Measure and Anisotropic Total p-Variation Regularization

Full waveform inversion (FWI) is a high-resolution seismic inversion technique popularly used in oil and gas exploration. Traditional FWI employs the $l_2$ norm measurement to minimize the misfit between observed and predicted seismic data. However, when the background velocity is inaccurate or the seismic data lacks low-frequency components, the ...
He, Liangsheng, Song, Chao, Liu, Cai
openaire   +2 more sources

Automatic Differentiation‐Based Full Waveform Inversion With Flexible Workflows

Journal of Geophysical Research: Machine Learning and Computation
Full waveform inversion (FWI) is able to construct high‐resolution subsurface models by iteratively minimizing discrepancies between observed and simulated seismic data.
Feng Liu, Haipeng Li, Guangyuan Zou, Junlun Li   +3 more
doaj   +1 more source

An extended Gauss-Newton method for full waveform inversion [PDF]

Full waveform inversion (FWI) is a large-scale nonlinear ill-posed problem for which computationally expensive Newton-type methods can become trapped in undesirable local minima, particularly when the initial model lacks a low-wavenumber component and ...
Gholami, Ali
core  

Finite-Aperture Ultrasound Field Reproduction in Coarse-Grid FDTD via Operator-Consistent Source Reduction. [PDF]

Bioengineering (Basel)
Zhang H, Xu Y, Yan W, Wu Y, Guo X, Zhou X, Zhang P, Li Z, Tan H, Zeng J, Qiu W, Cai C, Ding M, Yuchi M.   +13 more
europepmc   +1 more source

High-Precision Corrosion Detection via SH1 Guided Wave Based on Full Waveform Inversion. [PDF]

Sensors (Basel), 2023
Wen J, Jiang C, Chen H.
europepmc   +1 more source

A multimodal adjoint-state formulation of Quantitative Photoacoustic Tomography with external acoustic sources. [PDF]

Photoacoustics
Segerlund M, Löfqvist T.
europepmc   +1 more source

Cross-plane shear wave elastography for viscoelasticity imaging. [PDF]

Phys Med Biol
Pitsinger RP, Guddati MN.
europepmc   +1 more source