Results 21 to 30 of about 9,196 (138)

Regularization strategy for the layered inversion of airborne TEM data: application to VTEM data acquired over the basin of Franceville (Gabon) [PDF]

, 2011
Airborne transient electromagnetic (TEM) is a cost-effective method to image the distribution of electrical conductivity in the ground. We consider layered earth inversion to interpret large data sets of hundreds of kilometre. Different strategies can be
Aster, Auken, Auken, Chen, Christensen, Christiansen, Constable, Cox, Hansen, Hansen, Huang, Huang, Lanczos, Ley-Cooper, Menke, Monteiro Santos, Oldenburg, Palacky, Portniaguine, Raiche, Siemon, Vallée, Viezzoli, Ward, Wilson, Wolfgram, Zhdanov   +26 more
core   +2 more sources

The Crustal Thickness of the Philippine Sea Plate Derived from Gravity Data

Terrestrial, Atmospheric and Oceanic Sciences, 2015
We constructed a new free-air gravity anomaly map of the Philippine Sea Plate (PSP) using ship-tracked gravity data from the National Geophysical Data Center (NGDC).
Horng-Yuan Yen, Yu-Tsung Lo, Yu-Lien Yeh, Hsien-Hsiang Hsieh, Wen-Yen Chang, Chieh-Hung Chen, Chun-Rong Chen, and Min-Hung Shih   +7 more
doaj   +1 more source

Image Interpretation Using Appraisal Analysis [PDF]

, 2006
In geophysical inversion, a significant effort is invested to obtain images of the Earth from finite data. The first step is to obtain an image i.e. solve the inverse problem.
Miller, Carlyle R., Routh, Partha S.
core   +2 more sources

Transition from connected to fragmented vegetation across an environmental gradient: scaling laws in ecotone geometry [PDF]

, 2009
A change in the environmental conditions across space—for example, altitude or latitude—can cause significant changes in the density of a vegetation type and, consequently, in spatial connectivity.
Gastner, Michael T., Oborny, Beata, Pruessner, Gunnar, Zimmermann, D. K.   +3 more
core   +1 more source

A numerical method for efficient 3D inversions using Richards equation

, 2017
Fluid flow in the vadose zone is governed by Richards equation; it is parameterized by hydraulic conductivity, which is a nonlinear function of pressure head.
Cockett, Rowan, Haber, Eldad, Heagy, Lindsey J.   +2 more
core   +1 more source

Lipschitz stability for the electrostatic inverse boundary value problem with piecewise linear conductivities [PDF]

, 2015
We consider the electrostatic inverse boundary value problem also known as electrical impedance tomography (EIT) for the case where the conductivity is a piecewise linear function on a domain $\Omega\subset\mathbb{R}^n$ and we show that a Lipschitz ...
Alessandrini, Giovanni, de Hoop, Maarten V., Gaburro, Romina, Sincich, Eva   +3 more
core   +2 more sources

Determining the Moho topography using an improved inversion algorithm: a case study from the South China Sea

Frontiers in Earth Science
The Parker-Oldenburg method, as a classical frequency-domain algorithm, has been widely used in Moho topographic inversion. The method has two indispensable hyperparameters, which are the Moho density contrast and the average Moho depth.
Hui Zhang, Hui Zhang, Hui Zhang, Hangtao Yu, Hangtao Yu, Hangtao Yu, Chuang Xu, Chuang Xu, Rui Li, Rui Li, Rui Li, Lu Bie, Lu Bie, Lu Bie, Qingyin He, Qingyin He, Qingyin He, Yiqi Liu, Yiqi Liu, Yiqi Liu, Jinsong Lu, Jinsong Lu, Jinsong Lu, Yinan Xiao, Yinan Xiao, Yinan Xiao, Yang Lyu, Yang Lyu, Yang Lyu   +28 more
doaj   +1 more source

The characterization of feces and urine: a review of the literature to inform advanced treatment technology [PDF]

, 2015
The safe disposal of human excreta is of paramount importance for the health and welfare of populations living in low income countries as well as the prevention of pollution to the surrounding environment.
Cartmell, Elise, Jefferson, Bruce, Parker, Alison, Rose, C.   +3 more
core   +2 more sources

Improved Parker–Oldenburg method and its application to Moho topographic inversion in the northern South China Sea

Geophysical Journal International
SUMMARY Before inverting Moho topography, the traditional Parker–Oldenburg method requires the determination of two important hyperparameters, the average Moho depth and Moho density contrast. The selection of these two hyperparameters will directly affect the inversion results.
Hangtao Yu, Pengbo Qin, Chuang Xu, Hui Zhang, Yi Chai, Ranran Du   +5 more
openaire   +1 more source

Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data [PDF]

, 2001
International audienceOur aim is to understand better the rifting process by imaging the Moho depth variation beneath Corinth and Evvia. We present here the results of a gravity inversion analysis in the region of the Corinth and Evvia rift system, and ...
Diament, M, King, T, Lyon-Caen, H, Tiberi, C   +3 more
core   +5 more sources