Results 51 to 60 of about 2,383,589 (201)
The Galactic potential and the asymmetric distribution of hypervelocity stars
, 2009 In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such HVSs have possibly been ejected from the Galactic center and then propagated in the Galactic potential up to their current position.
Alexander, Tal +5 more
core +1 more source
Chern forms of singular metrics on vector bundles [PDF]
, 2017 We study singular hermitian metrics on holomorphic vector bundles, following Berndtsson-P{\u{a}}un. Previous work by Raufi has shown that for such metrics, it is in general not possible to define the curvature as a current with measure coefficients.
Lärkäng, Richard +3 more
core +2 more sources
Negative-sequence current filter based on inductance coils
International Journal of Electrical and Computer Engineering (IJECE)The construction of new relay protection systems without the use of current transformers is a fundamental problem of electro energetics, which has not yet been solved. This works suggests a negative-sequence current filter which receives information from inductance coils (ICs) mounted at a safe distance in the magnetic field of phase currents.
Mark Kletsel +3 more
openaire +1 more source
The Effects of Feedback Sequence on Cognitive Performance [PDF]
, 2015 The current study tested the effects of feedback sequence on performance on a visual-spatial task. Twenty-three female participants were randomly assigned to one of five feedback sequence conditions which occurred after two consecutive trials of a hole ...
Pyle, Travis W.
core +1 more source
Diffusion and migration in polymer electrolytes [PDF]
, 2020 Mixtures of neutral polymers and lithium salts have the potential to serve as electrolytes in next-generation rechargeable Li-ion batteries. The purpose of this review is to expose the delicate interplay between polymer-salt interactions at the segmental
Balsara, NP +4 more
core
Unbalanced and Reactive Load Compensation Using MMCC-Based SATCOMs With Third-Harmonic Injection [PDF]
, 2019 Modular multilevel cascaded converter-based STATCOMs are scalable to higher voltages without requiring a step-up transformer with multiple windings and can be realized using a low switching frequency, giving lower harmonic content and hence a reduced ...
Oghorada, OJK, Zhang, L
core +1 more source
Diagnosis of Stator Asymmetry in Permanent Magnet Synchronous Motors Using Negative Sequence Current [PDF]
Studies in Informatics and Control, 2019 In this paper, a new fault diagnosis approach is developed for stator asymmetry detection and localization in three-phase permanent magnet synchronous motors. Based on spectral analysis, Motor current signature analysis was extensively adopted for stator fault detection, but the same approach fails in identifying the faulty phase which causes the ...
Ammar A. B., Gritli Y., Benrejeb M.
openaire +1 more source
Ingeniería e Investigación, 2009 A negative sequence analysis in time domain was applied to fault detection of permanent magnet synchronous motors (PMSM). The fundamental components of the motor terminal currents were obtained using a Notch filter, based on which the negative se- quence
Jabid E. Quiroga
doaj
Genotypic and phenotypic characteristics of Cronobacter species, with particular attention to the newly reclassified species C. helveticus, C. pulveris, and C. zurichensis [forthcoming] [PDF]
, 2014 In 2013, Enterobacter helveticus, E. pulveris and E. turicensis, were reclassified as Cronobacter helveticus, C. pulveris and C. zurichensis, respectively. Previously these species had been used as negative controls for some Cronobacter detection assays.
Forsythe, SJ +3 more
core +1 more source
Co-phase Traction Supply System Based on Vv or Scott Traction Transformer and Its Control
Kongzhi Yu Xinxi Jishu, 2018 Loss of operation speed and traction force, caused by power quality and neutral section, is the main problem of the electric railway’s traction power supply system.
ZHANG Zhichun, WU Liran
doaj