Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Gerald W. Hohmann"'
Publikováno v:
GEOPHYSICS. 61:121-130
The size and low resistivity of the clay cap associated with a geothermal system create a target well suited for electromagnetic (EM) methods and also make electrical detection of the underlying geothermal reservoir a challenge. Using 3-D numerical m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c81aabadc31e88d8bd0d1282b5ef66c9
https://doi.org/10.1190/1.1443931
https://doi.org/10.1190/1.1443931
Publikováno v:
GEOPHYSICS. 61:169-179
By computing only the diagonal terms of the volume integral equation forward solution of the 3-D DC resistivity problem, we have achieved a fast forward solution accurate at low to moderate resistivity contrasts. The speed and accuracy of the solutio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b57be57827e8a7f916e4023d397f26f
https://doi.org/10.1190/1.1443937
https://doi.org/10.1190/1.1443937
Publikováno v:
GEOPHYSICS. 60:1265-1269
Many mineral targets are located near contact zones. Since the change of resistivity across the contact can distort or obscure the transient electromagnetic (TEM) response of the target, it is important to understand the possible effects.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b751175595ac7a76e1d36b5a7d6a5a31
https://doi.org/10.1190/1.1443859
https://doi.org/10.1190/1.1443859
Autor:
Gerald W. Hohmann, Louise Pellerin
Publikováno v:
GEOPHYSICS. 60:43-52
Measurement of the vertical magnetic field caused by a vertical electric source (VES) is an attractive exploration option because the measured response is caused by only 2-D and 3-D structures. The absence of a host response markedly increases the de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33ad3e91192f861800c74c47e6865b6c
https://doi.org/10.1190/1.1443761
https://doi.org/10.1190/1.1443761
Publikováno v:
Radio Science. 29:1143-1156
Inversion of three-dimensional transient electromagnetic (TEM) data to obtain electrical conductivity and permeability can be done by a time-domain algorithm that extends to diffusive electromagnetic (EM) fields the imaging methods originally develop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::50c7e70237564ba5367e0441727aa9e5
https://doi.org/10.1029/94rs00617
https://doi.org/10.1029/94rs00617
Autor:
Gerald W. Hohmann, Tsili Wang
Publikováno v:
GEOPHYSICS. 58:797-809
We have developed a finite‐difference solution for three‐dimensional (3-D) transient electromagnetic problems. The solution steps Maxwell’s equations in time using a staggered‐grid technique. The time‐stepping uses a modified version of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7cb8087d41d3051a6d689a46f42ff0a
https://doi.org/10.1190/1.1443465
https://doi.org/10.1190/1.1443465
Autor:
Gerald W. Hohmann, A.C. Tripp
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 31:121-126
An inversion algorithm for a vertical magnetic dipole source and a vertical magnetic field component receiver is presented. A three-dimensional integral equation algorithm is used for calculating the electromagnetic response of a particular trial res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::049bd02bcc430978c03b7a07ad211703
https://doi.org/10.1109/36.210452
https://doi.org/10.1109/36.210452
Autor:
Kim B. Olsen, Gerald W. Hohmann
Publikováno v:
GEOPHYSICS. 57:466-469
A typical time‐domain electromagnetic (TDEM) survey is carried out by recording the transient response of the target area due to currents induced by the abrupt turnoff of the current in a large ungrounded loop at the surface. The depth of explorati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bea7d55db50cbad44e0df6f80c5ee157
https://doi.org/10.1190/1.1443260
https://doi.org/10.1190/1.1443260
Autor:
Gerald W. Hohmann, N. B. Boschetto
Publikováno v:
GEOPHYSICS. 56:255-264
Modeling the controlled‐source audiofrequency magnetotelluric (CSAMT) responses of simple three‐dimensional (3-D) structures due to a grounded electric bipole confirms that the CSAMT technique accurately simulates plane‐wave results in the far
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e663491f1045dcc6b27e16870f40e253
https://doi.org/10.1190/1.1443038
https://doi.org/10.1190/1.1443038
Publikováno v:
Reviews of Geophysics. 29:405-415
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db43191e6595131cfb81518ca3e29e0e
https://doi.org/10.1002/rog.1991.29.s1.405
https://doi.org/10.1002/rog.1991.29.s1.405