Results 21 to 30 of about 623 (160)

Dual-Mode Brushless Wound Rotor Synchronous Machine for High Starting Torque

open access: yesIEEE Access, 2022
This paper proposes a dual-mode brushless wound rotor synchronous machine (DBL-WRSM) for high starting torque. The proposed DBL-WRSM consists of two modes: induction and brushless (BL)-synchronous modes.
Ali Roshanzamir   +5 more
doaj   +1 more source

Resonantly Forced Baroclinic Waves in the Oceans: A New Approach to Climate Variability

open access: yesJournal of Marine Science and Engineering, 2020
How variations in Earth’s orbit pace the glacial-interglacial cycles of the Quaternary are probably one of the greatest mysteries of modern climate science.
Jean-Louis Pinault
doaj   +1 more source

Nonlinear Interaction of Low-frequency Alfvén Waves and Ions

open access: yesThe Astrophysical Journal, 2023
The interaction between Alfvén waves and particles is a critical phenomenon in space and laboratory plasmas, and it has been observed that low-frequency Alfvén waves can accelerate and heat ions through subharmonic resonant interactions.
Xianshu Wu   +4 more
doaj   +1 more source

A Simulation for Detecting Nonlinear Echoes from Microbubbles Packets

open access: yesArchives of Acoustics, 2014
This work presents a simulation of the response of packets of microbubbles in an ultrasonic pulse-echo scan line. Rayleigh-Plesset equation has been used to predict the echo from numerically obtained radial dynamics of microbubbles. Varying the number of
Mohamed Galal Sayed ALI   +2 more
doaj   +1 more source

Anharmonic classical time crystals: A coresonance pattern formation mechanism

open access: yesPhysical Review Research, 2021
Driven many-body systems have been shown to exhibit discrete time crystal phases characterized by broken discrete time-translational symmetry. This has been achieved generally through a subharmonic response, in which the system undergoes one oscillation ...
Zachary G. Nicolaou, Adilson E. Motter
doaj   +1 more source

Research of Ferroresonance in 6-35 kV Electrical Networks Taking Into Account the Dynamic Model of Non-Linear Inductivity of Power Transformer

open access: yesProceedings of the International Conference on Applied Innovations in IT, 2023
Considering that distribution networks of 6-35 kV are the longest among electrical networks, one of the specialaspects of improving the reliability of power supply is the study of the effect of ferroresonance on the performance of voltage transformers ...
Shavkat Begmatov
doaj   +1 more source

Topological interpretation of subharmonic mode locking in coupled oscillators with inertia [PDF]

open access: yesPhysical Review B, 2001
To appear in Physical Review ...
Choi, M. Y., Thouless, D. J.
openaire   +2 more sources

Unified subharmonic oscillation conditions for peak or average current mode control [PDF]

open access: yesInternational Journal of Circuit Theory and Applications, 2014
SummaryThis paper is an extension of the author's recent research in which only buck converters were analyzed. Similar analysis can be equally applied to other types of converters. In this paper, a unified model is proposed for buck, boost, and buck–boost converters under peak or average current mode control to predict the occurrence of subharmonic ...
openaire   +2 more sources

Higgs time crystal in a high-T_{c} superconductor

open access: yesPhysical Review Research, 2020
We propose to induce a time-crystalline state in a high-T_{c} superconductor, by optically driving a sum resonance of the Higgs mode and a Josephson plasma mode. The generic cubic process that couples these fundamental excitations converts driving of the
Guido Homann   +2 more
doaj   +1 more source

Broadband Photo-Excited Coherent Acoustic Frequency Combs and Mini-Brillouin-Zone Modes in a MQW-SESAM Structure

open access: yesApplied Sciences, 2019
A multiple quantum-well semiconductor saturable absorber mirror (MQW-SESAM) structure has been investigated by femtosecond pump-probe laser spectroscopy at a central wavelength of around 1050 nm.
Changxiu Li   +4 more
doaj   +1 more source

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