Zobrazeno 1 - 10
of 104
pro vyhledávání: '"David C. Nobes"'
Publikováno v:
Geological Journal. 57:4011-4034
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4026beba7e6ba12ab4314659e6702af1
https://doi.org/10.1002/gj.4525
https://doi.org/10.1002/gj.4525
2-D fast sweeping method for the factored Eikonal equation and its improvement on inversion accuracy
Publikováno v:
Journal of Applied Geophysics. 166:68-76
Curvature of wavefront is very large near source point. However, plane wavefront assumption is adopted when calculating traveltimes by use of finite-difference scheme. Therefore, source singularity problem exists for all finite-difference based eikon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8cb0cd4a573a9fded15dbb48450e292
https://doi.org/10.1016/j.jappgeo.2019.04.016
https://doi.org/10.1016/j.jappgeo.2019.04.016
Publikováno v:
Exploration Geophysics. 50:144-158
This paper presents a first-arrival tomography incorporating a fast sweeping method (FSM) solving the factored eikonal equation (factored FSM). The traveltime calculation method plays a significant role in velocity inversion. However, for a point sou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7636c6da52a92b9ebfd3f4843b2c87d5
https://doi.org/10.1080/08123985.2019.1577110
https://doi.org/10.1080/08123985.2019.1577110
Autor:
David C. Nobes, Estella A. Atekwana
Publikováno v:
Interpretation. 6:SL1-SL9
Too often, ideas become so well-established that they take on the roles of paradigms, and challenging those paradigms can be difficult, even if they are flawed. Similarly, misconceptions can take root and become firmly entrenched and again are diffic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5df0a2b4af0a74255c1f36714c7c2d3
https://doi.org/10.1190/int-2017-0104.1
https://doi.org/10.1190/int-2017-0104.1
Autor:
David C. Nobes
Publikováno v:
Interpretation. 6:SL21-SL28
Voids are features that occur commonly in near-surface geophysical imaging. They are usually readily identified in ground penetrating radar (GPR) imaging because of the strong reflection amplitudes, akin to the “bright spot” in oil and gas explor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffebb8536eca11b8b4d729dead792f7f
https://doi.org/10.1190/int-2018-0049.1
https://doi.org/10.1190/int-2018-0049.1
Publikováno v:
Fuzzy Sets and Systems. 337:93-112
Electrical resistivity imaging (ERI) inversion is a complicated non-linear inversion problem, which is high dimensional and non-convex. Using traditional neural networks to solve the ERI inversion problem has an over-fitting phenomenon and easily fal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df0dd35620909df856236c7c3b4aeea2
https://doi.org/10.1016/j.fss.2017.07.009
https://doi.org/10.1016/j.fss.2017.07.009
Autor:
Zhang Hua, Tao Chunhui, Zhang Jin, Zhang Xiaofeng, Li Hong-Xing, Liu Cai, Gennady Goloshubin, David C. Nobes, Huang Guangnan
Publikováno v:
The Journal of the Acoustical Society of America. 143:141-149
Acoustic inversion for the physical parameters of seafloor sediments is an important and difficult aspect of sediment acoustic research. Submarine surface sediments are typical porous media, which involve many parameters. Thus, the optimization of hi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a3a4fb472183b36ac73897151713c5d
https://doi.org/10.1121/1.5020272
https://doi.org/10.1121/1.5020272
Autor:
David C. Nobes, Elizabeth Reddy, Lee M. Liberty, Richard Krahenbuhl, Hendratta Ali, Jeffrey Shragge
Publikováno v:
GEOPHYSICS. 87:WAi-WAii
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e96d28e6a66635fa77b73a1006630753
https://doi.org/10.1190/geo2021-1117-spseintro.1
https://doi.org/10.1190/geo2021-1117-spseintro.1
Publikováno v:
GEOPHYSICS. 82:N43-N49
Inverse [Formula: see text] filtering can perform energy compensation and phase correction of seismic reflection data, but it has an instability problem due to its high-pass characteristics. Although improved methods, such as gain-limited inverse [Fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ad0765d98e9be1f8b429f53ed7c6663
https://doi.org/10.1190/geo2016-0061.1
https://doi.org/10.1190/geo2016-0061.1
Publikováno v:
Computers & Geosciences. 104:29-34
The Jacobian matrix in the seismic traveltime tomographic equations usually contains several integral terms. These integral expressions not only greatly increase the computational complexity of seismic traveltime tomography, but also increase difficu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::251d967fc5c082832700a24181387b60
https://doi.org/10.1016/j.cageo.2017.04.002
https://doi.org/10.1016/j.cageo.2017.04.002