Results 81 to 90 of about 6,446,922 (262)

Contribution of PPP with Ambiguity Resolution to the Maintenance of Terrestrial Reference Frame

open access: yesRemote Sensing
Precise Point Positioning (PPP) provides static positioning at the millimeter level and kinematic positioning ranging from millimeters to decimeters globally.
Ruyuan Wang   +4 more
doaj   +1 more source

Task-dependent and independent synchronous activity of monkey hippocampal neurons in real and virtual translocation

open access: yesFrontiers in Behavioral Neuroscience, 2011
Previous neurophysiological and behavioral studies relate hippocampal functions to place learning and memory, and encoding of task (or context)-specific information.
Etsuro eHori   +5 more
doaj   +1 more source

An Automated Reference Frame Selection (ARFS) Algorithm for Cone Imaging with Adaptive Optics Scanning Light Ophthalmoscopy

open access: yesTranslational Vision Science & Technology, 2017
Purpose To develop an automated reference frame selection (ARFS) algorithm to replace the subjective approach of manually selecting reference frames for processing adaptive optics scanning light ophthalmoscope (AOSLO) videos of cone photoreceptors ...
A. Salmon   +5 more
semanticscholar   +1 more source

Training sample selection for space–time adaptive processing based on multi-frames

open access: yesThe Journal of Engineering, 2019
As training samples are not identically distributed with cell under test (CUT) in heterogeneous environments, the performance of space–time adaptive processing (STAP) to suppress clutter degrades. To improve the performance of STAP, this study proposes a
Chenxiao Zhang   +3 more
doaj   +1 more source

The Relationship between Flux Coordinates and Equilibrium-based Frames of Reference in Fusion Theory

open access: yes, 2019
The properties of two local reference frames based on the magnetic field and the current density are investigated for magnetized plasmas in toroidal geometry with symmetric angle.
Greene, John M., Kruger, Scott E.
core   +1 more source

Integration of egocentric and allocentric information during memory-guided reaching to images of a natural environment

open access: yesFrontiers in Human Neuroscience, 2014
When interacting with our environment we generally make use of egocentric and allocentric object information by coding object positions relative to the observer or relative to the environment, respectively.
Katja eFiehler   +3 more
doaj   +1 more source

Reference frames in visual selection

open access: yesAnnals of the New York Academy of Sciences, 2013
We review neuropsychological evidence for visual selection operating in different reference frames. There is general agreement that there may be a separation of coding space near to and farther from the body, and that deficits in selecting stimuli within each form of spatial representation may be impaired in patients with unilateral neglect.
Humphreys, G   +3 more
openaire   +3 more sources

Research of selection of reference stations in mine area deformation monitoring based on JSCORS

open access: yesGong-kuang zidonghua, 2015
Based on data information of Jiangsu Province continuously operating reference stations, the influence of the number and distribution of CORS reference stations to the solution accuracy of GPS network data were discussed combining with 6 stations ...
CHEN Zhongwei   +3 more
doaj   +1 more source

ITRF2008: an improved solution of the international terrestrial reference frame

open access: yes, 2011
ITRF2008 is a refined version of the International Terrestrial Reference Frame based on reprocessed solutions of the four space geodetic techniques: VLBI, SLR, GPS and DORIS, spanning 29, 26, 12.5 and 16 years of observations, respectively.
Z. Altamimi, X. Collilieux, L. Métivier
semanticscholar   +1 more source

An Autonomous Reference Frame for Relativistic GNSS

open access: yes, 2013
Current GNSS systems rely on global reference frames which are fixed to the Earth (via the ground stations) so their precision and stability in time are limited by our knowledge of the Earth dynamics.
Carloni, Sante   +4 more
core  

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