Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Reza Ghanati"'
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 58, Iss 2, Pp 153-160 (2024)
Induced polarization (IP) tomography measurements as a near-surface geophysical method can provide information about the degree of chargeability of subsurface materials, and are commonly used in mineral exploration, engineering studies (e.g., sedimen
Externí odkaz:
https://doaj.org/article/e96f3cee83034fa6aa83092605f10245
Autor:
Ahmad Alvandi, Reza Ghanati
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 57, Iss 3, Pp 251-258 (2023)
Magnetic data play a significant role in the interpretation of various geologic structures using depth estimation methods and edge detection filters. In this study, we applied methods based on directional derivatives such as tilt-depth (TD), signum t
Externí odkaz:
https://doaj.org/article/4bfdd816dee84df5b943ca7b24fd69c1
Autor:
Reza Ghanati, Mahdi Fallahsafari
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 57, Iss 3, Pp 335-341 (2023)
Electrical resistance tomography (ERT) provides images of the electrical properties of subsurface materials leading to the distinction of different Earth’s interior structures. The accuracy of electrical resistance imaging is strongly affected by t
Externí odkaz:
https://doaj.org/article/b26746925c8c4602b8fb283119e1906c
Publikováno v:
International Journal of Mining and Geo-Engineering, Vol 57, Iss 2, Pp 171-182 (2023)
Dealing with numerous reviews and widespread inquiries, it has been concluded that much more information and interpretive parameters are accessible regarding the subsurface structures when using a particular frequency range in the spectral induced po
Externí odkaz:
https://doaj.org/article/c1f8e9137ec8404ea836cb3948e1aefd
Controlled-source electromagnetic (CSEM) method is widely used for submarine hydrocarbon reservoir modeling. Compared to seismic reflection measurements, this method is less accurate, but it has reduced processing costs. The partial differential equa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf0907b2ec473aa4dea2c68f30ca70e0
https://doi.org/10.5194/egusphere-egu23-17509
https://doi.org/10.5194/egusphere-egu23-17509
Publikováno v:
Near Surface Geophysics.
The combination of geophysical surface‐based imaging techniques, including seismic and electrical resistivity tomography (ERT), is now common practice to obtain a more accurate characterization of subsurface structures. Due to model non‐uniquenes
Autor:
Reza Ghanati, Mike Müller-Petke
Publikováno v:
Journal of Applied Geophysics. 191:104356
In nonlinear inversion of geophysical data, improper initial approximation of the model parameters usually leads to local convergence of the normal Newton iteration methods, despite enforcing constraints on the physical properties. To mitigate this p
Publikováno v:
Acta Geodaetica et Geophysica. 52:555-580
In this paper we tackle the problem of inverting geophysical magnetic data due to simple shape anomalies caused by thin sheet, cylinder and fault models using Occam’s inversion scheme. A significant aspect of using Occam’s inversion is the choice
Publikováno v:
25th European Meeting of Environmental and Engineering Geophysics.
Publikováno v:
Journal of Applied Geophysics. 130:118-130
Ambient electromagnetic interferences at the site of investigation often degrade the signal quality of the Surface-NMR measurements leading to inaccurate estimation of the signal parameters. This paper proposes a new powerful de-noising method based