Results 21 to 30 of about 229,027 (259)

The incompleteness of complete pseudoscalar-meson photoproduction [PDF]

open access: yes, 2013
[Background] A complete set is a minimum set of observables which allows one to determine the underlying reaction amplitudes unambiguously. Pseudoscalar-meson photoproduction from the nucleon is characterized by four such amplitudes and complete sets ...
Ryckebusch, Jan   +3 more
core   +3 more sources

Atmospheric effects and spurious signals in GPS analyses [PDF]

open access: yes, 2015
Improvements in the analyses of Global Positioning System (GPS) observations yield resolvable millimeter to submillimeter differences in coordinate estimates, thus providing sufficient resolution to distinguish subtle differences in analysis ...
Tregoning, Paul   +1 more
core   +1 more source

Long Baseline GPS+BDS RTK Positioning with Partial Ambiguity Resolution [PDF]

open access: yesThe International Technical Meeting of the The Institute of Navigation, 2017
Reliable real-time kinematic positioning requires the occurrence of incorrect integer ambiguity estimates to be limited to a maximum tolerable rate. For long baselines this usually implies long convergence times due to the presence of atmospheric delay parameters.
openaire   +1 more source

Predicting the Success Rate of Long-baseline GPS+Galileo (Partial) Ambiguity Resolution [PDF]

open access: yesJournal of Navigation, 2014
This contribution covers precise (cm-level) relative Global Navigation Satellite System (GNSS) positioning for which the baseline length can reach up to a few hundred km. Carrier-phase ambiguity resolution is required to obtain this high positioning accuracy within manageable observation time spans.
Odijk, Dennis   +2 more
openaire   +2 more sources

Quantifying neptunium oxidation states in nitric acid through spectroelectrochemistry and chemometrics

open access: yesFrontiers in Nuclear Engineering, 2023
Controlled-potential in situ thin-layer spectropotentiometry was leveraged to generate visible/near-infrared (VIS/NIR) absorption spectral data sets for the development of chemometric models to quantify Np(III/IV/V/VI) oxidation states in HNO3.
Luke R. Sadergaski   +3 more
doaj   +1 more source

Integrity Monitoring of PPP-RTK Positioning; Part I: GNSS-Based IM Procedure

open access: yesRemote Sensing, 2021
Nowadays, integrity monitoring (IM) is required for diverse safety-related applications using intelligent transport systems (ITS). To ensure high availability for road transport users for in-lane positioning, a sub-meter horizontal protection level (HPL)
Kan Wang   +3 more
doaj   +1 more source

Low-Resolution Fault Localization Using Phasor Measurement Units with Community Detection [PDF]

open access: yes, 2018
A significant portion of the literature on fault localization assumes (more or less explicitly) that there are sufficient reliable measurements to guarantee that the system is observable. While several heuristics exist to break the observability barrier,
Jamei, Mahdi   +2 more
core   +2 more sources

Unsupervised Named-Entity Recognition: Generating Gazetteers and Resolving Ambiguity [PDF]

open access: yes, 2006
In this paper, we propose a named-entity recognition (NER) system that addresses two major limitations frequently discussed in the field. First, the system requires no human intervention such as manually labeling training data or creating gazetteers ...
Matwin, Stan   +2 more
core   +2 more sources

G4 Multi-constellation Precise Point Positioning Service for High Accuracy Offshore Navigation [PDF]

open access: yesTransNav, 2017
Fugro is operating a global GNSS infrastructure for the delivery of high-accuracy multi-constellation Precise Point Positioning (PPP) service, named G4.
Javier Tegedor   +4 more
doaj   +1 more source

D-Brane Gauge Theories from Toric Singularities and Toric Duality [PDF]

open access: yes, 2000
Via partial resolution of Abelian orbifolds we present an algorithm for extracting a consistent set of gauge theory data for an arbitrary toric variety whose singularity a D-brane probes.
Aganagic   +33 more
core   +5 more sources

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