Results 101 to 110 of about 1,738 (216)

Influence of subharmonics on thermal loads of an induction machine

open access: yes, 2009
One of most important energy receivers is an induction cage machine. It can work properly provided that it is supplied with balanced, sinusoidal voltage of appropriate frequency and rms value.
Pepliński, M.   +2 more
core  

On delta $m$-subharmonic functions

open access: yesAnnales Polonici Mathematici, 2016
Let \(\Omega\subset \mathbb C^n\) be a bounded \(m\)-hyperconvex domain, i.e, a domain for which there exists a bounded \(m\)-subharmonic exhaustion function, and assume \(1\leq m\leq n\). Let \(\mathcal E_{0,m}\) be the class of bounded \(m\)-subharmonic functions \(u\) in \(\Omega\) with zero boundary values and with bounded total \(m\)-Hessian mass \
openaire   +3 more sources

Origin of broadband acoustic emission from a dancing cavitation bubble

open access: yesApplied Physics Express
Acoustic cavitation generates bubbles exhibiting violent expansion and contraction under intense ultrasound in liquids. The acoustic emissions (AE) spectrum from cavitation bubbles contains harmonics, subharmonics, ultraharmonics, and broadband noise ...
Hyang-Bok Lee, Pak-Kon Choi
doaj   +1 more source

Minimal complexity of subharmonics in a class of planar periodic predator-prey models

open access: yes, 2021
This contribution analyzes the existence of -periodic coexistence states, for 1, in two classes of non-autonomous predator-prey Volterra systems with periodic coefficients.
Zanolin, Fabio   +2 more
core  

Emergence of subharmonics in a microwave driven dissipative Rydberg gas

open access: yesPhysical Review Research
Quantum many-body systems near phase transitions respond collectively to externally applied perturbations. We explore this phenomenon in a laser-driven dissipative Rydberg gas that is tuned to a bistable regime.
Zong-Kai Liu   +14 more
doaj   +1 more source

On subharmonicity of doubly subharmonic functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1966
openaire   +1 more source

Ac square-wave field-induced subharmonics in photorefractive sillenite: threshold for excitation by inclusion of higher harmonics

open access: yes, 1999
We investigated both analytically and numerically the simultaneous influence of higher-harmonic gratings and subharmonic gratings on the threshold for generation of the subharmonic K/2 grating.
Johansen, P.M.   +7 more
core   +1 more source

FLEXIBLE SYNCHRONOUS REGULATION OF POWER ELECTRONIC BLOCKS OF TRANSFORMER-BASED PHOTOVOLTAIC STATIONS

open access: yesJournal of Engineering Science (Chişinău)
The paper presents the results of developing a scheme for synchronous pulse-width modulation (PWM) of signals in dual voltage source diode-clamped inverters (VSDCIs) used in grid-tied, transformer-based photovoltaic (PV) stations.
OLESCHUK, Valentin
doaj   +1 more source

Convolutional neural network for subharmonics detection in Hardware-In-the-Loop

open access: yes, 2023
Hardware-In-the-Loop (HIL) has become a popular technique for testing real-time complex systems. One of its possible applications is power converter modeling in order to test digital controllers.
Castro, Angel de   +3 more
core  

Subharmonics increase the auditory impact of female koala rejection calls

open access: yes, 2017
Although non-linear phenomena are common in human and non-human animal vocalisations, their functional relevance remains poorly understood. One theory posits that non-linear phenomena generate unpredictability in vocalisations, which increases the ...
BD Charlton (15810029)   +2 more
core  

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