Results 31 to 40 of about 285,137 (292)

Analytic Inversion of Emission Lines of Arbitrary Optical Depth for the Structure of Supernova Ejecta [PDF]

open access: yes, 2000
We derive a method for inverting emission line profiles formed in supernova ejecta. The derivation assumes spherical symmetry and homologous expansion (i.e., $v(r) \propto r$), is analytic, and even takes account of occultation by a pseudo-photosphere ...
Adam Fisher   +17 more
core   +2 more sources

A simple but efficient non-linear method for 2D inversion of magnetic field data based on Ridge-Regression algorithm [PDF]

open access: yesInternational Journal of Mining and Geo-Engineering, 2021
In geophysical exploration, inversion is carried out on the observed data to generate a geophysical model, approximating the subsurface geological struc­ture.
Ali Moradzadeh   +3 more
doaj   +1 more source

Cenozoic evolution of the eastern Black Sea: a test of depth-dependent stretching models [PDF]

open access: yes, 2008
Subsidence analysis of the eastern Black Sea basin suggests that the stratigraphy of this deep, extensional basin can be explained by a predominantly pure-shear stretching history.
Edwards, Glyn R.H.   +6 more
core   +1 more source

Inverse Depth Parametrization for Monocular SLAM [PDF]

open access: yesIEEE Transactions on Robotics, 2008
We present a new parametrization for point features within monocular simultaneous localization and mapping (SLAM) that permits efficient and accurate representation of uncertainty during undelayed initialization and beyond, all within the standard extended Kalman filter (EKF).
J. Civera, A.J. Davison, J. Montiel
openaire   +1 more source

Ground-based detections of thermal emission from CoRoT-1b and WASP-12b [PDF]

open access: yes, 2011
We report a new detection of the H-band thermal emission of CoRoT-1b and two confirmation detections of the Ks-band thermal emission of WASP-12b at secondary eclipses. The H-band measurement of CoRoT-1b shows an eclipse depth of 0.145%\pm0.049% with a 3-{
Barman   +18 more
core   +3 more sources

Effect of the One-to-Many Relationship between the Depth and Spectral Profile on Shallow Water Depth Inversion Based on Sentinel-2 Data

open access: yesRemote Sensing
In shallow water, Sentinel-2 multispectral imagery has only four visible bands and limited quantization levels, which easily leads to the occurrence of the same spectral profile but different depth (SSPBDD) phenomenon, resulting in a one-to-many ...
Erhui Huang   +3 more
doaj   +1 more source

Depth Inversion from Wave Frequencies in Temporally Augmented Satellite Video

open access: yesRemote Sensing, 2022
Optical satellite images of the nearshore water surface offer the possibility to invert water depths and thereby constitute the underlying bathymetry.
Matthijs Gawehn   +4 more
doaj   +1 more source

Forward modelling of sub-photospheric flows for time-distance helioseismology [PDF]

open access: yes, 2007
Context: The results of forward modelling of acoustic wave propagation in a realistic solar sub-photosphere with two cases of steady horizontal flows are presented and analysed by the means of local helioseismology.
Erdélyi, Robert   +2 more
core   +2 more sources

REDUCED BINOCULAR DEPTH INVERSION IN PATIENTS WITH ALCOHOLISM [PDF]

open access: yesAlcohol and Alcoholism, 1998
Binocular depth inversion represents an illusion of visual perception, serving to invert the perception of implausible hollow objects, e.g. a hollow face into a normal face. Such inversion occurs frequently, especially when objects with a higher degree of familiarity (e.g. photographs of faces) are displayed.
U, Schneider   +7 more
openaire   +2 more sources

Monitoring Specified Depth Soil Moisture in Field Scale with Ground Penetrating Radar

open access: yes智慧农业, 2022
Ground-penetrating radar (GPR) is one of the emerging technologies for soil moisture measurement. However, the measurement accuracy is difficult to determine due to some influence factors including radar wave frequency, soil texture type, etc.
ZHANG Wenhan   +6 more
doaj   +1 more source

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