Results 11 to 20 of about 2,967,034 (250)

Improved hydrogeophysical characterization using joint inversion of cross-hole electrical resistance and ground-penetrating radar traveltime data. [PDF]

, 2006
Appropriate regularizations of geophysical inverse problems and joint inversion of different data types improve geophysical models and increase their usefulness in hydrogeological studies.
Revil, Andre, Linde, Niklas, Tryggvason, Ari, Pedersen, Laust B., Binley, Andrew   +4 more
core   +5 more sources

Fracture‐Mesh Faulting in the Swarm‐Like 2020 Maacama Sequence Revealed by High‐Precision Earthquake Detection, Location, and Focal Mechanisms

Geophysical Research Letters, 2023
In August of 2020, an earthquake sequence initiated within the Maacama fault zone in northern California, raising questions about its relationship with the larger‐scale fault.
David R. Shelly, Robert J. Skoumal, Jeanne L. Hardebeck   +2 more
doaj   +1 more source

In situ stress distribution law of fault zone in tunnel site area based on the inversion method with optimized fitting conditions

Frontiers in Earth Science, 2023
Tunnel construction in high geo-stress strata faces the risk of extreme natural disasters such as large squeezing deformation and rockburst. Therefore, it is of great significance to adopt a high-precision inversion method to investigate the distribution
Tiansheng Li, Tiansheng Li, Ziquan Chen, Zihan Zhou, Yeming Bao   +4 more
doaj   +1 more source

Research into using a fiber Bragg grating sensor group for three-dimensional in situ stress measurement [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2022
The observation and estimation of the deep crustal stress state is a key and difficult problem for in situ stress measurement. Using a borehole wall strain gauge based on the overcoring stress-relieving method is one of the main methods of in situ stress
Y. Liu, Y. Liu, Y. Liu, Z. Hou, H. Zhou, G. Gao, L. Yang, L. Yang, P. Wang, P. Wang, P. Wang   +10 more
doaj   +1 more source

Waveform inversion of the S reflector west of Spain: fine structure of a detachment fault. [PDF]

, 2005
The S reflection west of Iberia has been interpreted as a low-angle detachment fault separating crustal fault blocks from partially serpentinized mantle. We apply full waveform inversion to investigate the fine structure of S.
Minshull, TA, Reston, Timothy J., Reston, T.J., Leythaeuser, T., Reston, Timothy, Minshull, T.A., Minshull, T. A., Leythaeuser, T   +7 more
core   +1 more source

Stress Inversion code

, 2022
This stress inversion code was applied in our research to obatin the underground stress inferred from earthquake. 
Sheppard Dong (12674389)
core   +1 more source

Image source detection for geoacoustic inversion by Teager-Kaiser energy operator [PDF]

, 2014
This letter presents an improvement of the image source method (ISM) for geoacoustic inversion. The new algorithm is based on the Teager-Kaiser Energy Operator which ampli es the discontinuities in signals while the soft transitions are reduced.
DRIRA, Achraf, Laurent Guillon, GUILLON, Laurent, Achraf Drira, BOUDRAA, Abdel-Ouahab, Abdel-Ouahab Boudraa   +5 more
core   +1 more source

The accurate numerical inversion of laplace transforms [PDF]

, 1976
Inversion of almost arbitrary Laplace transforms is effected by trapezoidal integration along a special contour. The number n of points to be used is one of several parameters, in most cases yielding absolute errors of order 10-7 for n = 10, 10-11 for n
Tablot, A
core   +6 more sources

A note on the Smarandache inversion sequence [PDF]

, 2007
In a recent paper, Muneer introduced the Smarandache inversion sequence. In this paper, we study some properties of the Smarandache inversion sequence. Moreover, we find the necessary and su±cient condition such that [SI(n)]2 + [SI(n + 1)]2 is a perfect
Majumdar, A.A.K.
core   +1 more source

Comparison of MOLLI and ShMOLLI in Terms of T1 Reactivity and the Relationship between T1 Reactivity and Conventional Signs of Response during Adenosine Stress Perfusion CMR

Balkan Medical Journal, 2020
Background: One of the most important techniques of cardiac magnetic resonance in assessment of coronary heart diseases is adenosine stress myocardial first-pass perfusion imaging.
Esin Gezmiş, Charles Peebles, Andrew Flett, Ausami Abbas, Stephen Harden, James Shambrook   +5 more
doaj   +1 more source