Results 241 to 250 of about 109,361 (292)

Adaptive multinary inversion of gravity and gravity gradiometry data

Geophysics, 2017
We have developed a novel approach for inversion of gravity and gravity gradiometry data based on multinary transformation of the model parameters. This concept is a generalization of binary density inversion to the models described by any number of discrete model parameters.
Michael S Zhdanov, Wei Lin
exaly   +2 more sources

Combined Compact and Smooth Inversion for Gravity and Gravity Gradiometry Data

IEEE Transactions on Geoscience and Remote Sensing, 2022
Zhaoxi Chen
exaly   +2 more sources

Constraints in 3D gravity inversion

Geophysical Prospecting, 2001
A three‐dimensional (3D) inversion program is developed to interpret gravity data using a selection of constraints. This selection includes minimum distance, flatness, smoothness and compactness constraints, which can be combined using a Lagrangian formulation.
Olivier Boulanger, Michel Chouteau
openaire   +1 more source

Compact gravity inversion

Geophysics, 1983
Abstract A new criterion for the inversion of gravity data minimizes the volume of the causative body, which is equivalent to maximizing its compactness. The anomalous density distribution is obtained using an iterative technique which is numerically stable and rapidly convergent.
B. J. Last, K. Kubik
openaire   +1 more source

Interactive gravity inversion

SEG Technical Program Expanded Abstracts 2005, 2005
Abstract We have developed a new approach for estimating the location and geometry of several density anomalies that give rise to a complex, interfering gravity field. The user interactively defines the assumed outline of the true gravity sources in terms of points and line segments, and the method estimates sources closest to the ...
João B. C. Silva, Valéria C. F. Barbosa   +1 more
openaire   +1 more source

Ocular Manifestations of Gravity Inversion

JAMA: The Journal of the American Medical Association, 1985
To determine the ocular manifestations of inverting the human body into a head-down vertical position, we evaluated normal volunteers with applanation tonometry, fundus photography, fluorescein angiography, and ophthalmodynamometry. Compared with data obtained in the sitting position, the intraocular pressure more than doubled on inversion (35.6 ±4v14 ...
T R, Friberg, R N, Weinreb
openaire   +3 more sources

3‐D inversion of gravity data

SEG Technical Program Expanded Abstracts 1995, 1995
Abstract We present two methods for inverting surface gravity data to recover a 3-D distribution of density contrast. In the first method, we transform the gravity data into pseudomagnetic data via Poisson's relation and carry out the inversion using a 3-D magnetic inversion algorithm.
Yaoguo Li, Douglas W. Oldenburg
openaire   +1 more source

Gravity inversion in Qinghai-Tibet Plateau

Physics and Chemistry of the Earth, Part A: Solid Earth and Geodesy, 2000
Abstract Due to its high elevation and high seismicity the Qinghai-Tibet plateau takes a primary position on the earth surface. The inaccessibility of the region makes geophysical studies difficult. Active seismic sounding is available along essentially one line crossing the eastern part of the plateau.
BRAITENBERG, CARLA, ZADRO M, FANG J, WANG Y, HSU H. T.   +4 more
openaire   +2 more sources

Gravity inversion with depth normalization

2020
<p>Actually the most common method of gravity data interpretation is a manual fitting method. In this case, the density model is divided into many polygons with constant density and each polygon is editing manually by interpreter.
Lev Chepigo, Lygin Ivan, Andrey Bulychev
openaire   +1 more source

Ocular Effects of Gravity Inversion

JAMA: The Journal of the American Medical Association, 1985
To the Editor.— Friberg and Weinreb 1 recently reported the occurrence of increased intraocular pressure with the head-down position, and suggested that patients with certain conditions, including glaucoma, should refrain from inversion altogether. Report of a Case.— We recently saw a 68-year-old athletic physician in excellent health who was first ...
openaire   +2 more sources