Results 21 to 30 of about 6,537,748 (290)

Research on optimum extended phase-shift control with minimum peak-to-peak current of DAB converter applied to small DC power grid

open access: yesFrontiers in Energy Research, 2023
The Dual Active Bridge (DAB) DC-DC converter has the ability of bidirectional power transmission and the modulation scheme that is easy to implement, which can ensure the efficient transmission of energy in the system.
Shuhuai Shi   +5 more
doaj   +1 more source

Human Circadian Phase Estimation from Signals Collected in Ambulatory Conditions Using an Autoregressive Model [PDF]

open access: yes, 2013
Phase estimation of the human circadian rhythm is a topic that has been explored using various modeling approaches. The current models range from physiological to mathematical, all attempting to estimate the circadian phase from different physiological ...
Gil, Enrique A   +12 more
core   +1 more source

Phase shifting technique for extended inline holographic microscopy with a pinhole array

open access: yesOptics Express, 2012
Digital inline holographic microscopy using a pinhole for sample illumination allows lensless imaging. To overcome restrictions of the sample size and density in the setup additional reference waves are generated by extending the single pinhole to a regular 2D pinhole array illumination.
Christian, Graulig   +2 more
openaire   +2 more sources

Improvement of the Constant-Power Speed Range of Surface-Permanent Magnet Machine Using Winding Switching

open access: yesIEEE Access, 2021
In this study, a cumulative/differential winding switching method is proposed for the extended constant power operation (CPO) of a surface-permanent magnet (SPM) machine.
Stanislav Sin   +2 more
doaj   +1 more source

Phase shift of the current under a single-phase short-circuit in the stator winding of a turbogenerator with double winding per phase [PDF]

open access: yes, 2015
© 2015, Springer-Verlag Berlin Heidelberg. An equivalent model of a faulty turbogenerator under a single-phase short-circuit in the stator winding is presented.
Fja?kowski, Zbigniew, Nouri, Hassan
core   +1 more source

Bulk-boundary correspondence between charged, anyonic strings and vortices

open access: yesJournal of High Energy Physics, 2018
We discuss a unified framework of dealing with electrically charged, anyonic vortices in 2+1 dimensional spacetimes and extended, anyonic string-like vortices in one higher dimension.
Alexander Gußmann   +2 more
doaj   +1 more source

Phase-shift mode of the East Asian trough from December to February: Characteristic and possible mechanisms

open access: yesFrontiers in Earth Science, 2022
The East Asian trough (EAT) is an important member of the East Asian winter monsoon system, profoundly influencing the local climate in winter. In this study, we report the phase-shift mode of the monthly EAT variations from December to February based on
Shui Yu, Mengqi Zhang, Xingxing Li
doaj   +1 more source

Optimal design of a new step-down 18-pulse autotransformer

open access: yes工程科学学报, 2017
Aiming at the requirement for voltage regulation with a 18-pulse autotransformer-rectifier, a novel step-down 18-pulse topology was designed and optimized based on the advantage of present topologies.
NIU Lan   +3 more
doaj   +1 more source

A Deep Q-Network based optimized modulation scheme for Dual-Active-Bridge converter to reduce the RMS current

open access: yesEnergy Reports, 2020
In order to reduce the conduction losses of the Dual-Active-Bridge (DAB) converter, this paper proposes an optimized modulation scheme based on deep reinforcement learning (DRL).
Yuanhong Tang   +6 more
doaj   +1 more source

Phase shift bandwidth and scan range in microstrip arrays by the element frequency tuning

open access: yes, 2006
In this paper, the far-field phase shift properties of microstrip patch antennas are investigated. It is shown that, similar to reflectarrays, the resonant nature of microstrip patches can be used to change the phase of the radiated field.
Sharma, SK   +3 more
core   +1 more source

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