Results 21 to 30 of about 925 (179)

Subharmonic functions, generalizations and separately subharmonic functions [PDF]

open access: yesJournal of Inequalities and Applications, 2006
First, we give the definition for quasi-nearly subharmonic functions, now for general, not necessarily nonnegative functions, unlike previously. We point out that our function class incudes, among others, quasisubharmonic functions, nearly subharmonic functions (in a slightly generalized sense) and almost subharmonic functions.
openaire   +7 more sources

Induction Motor Supplied with Voltage Containing Symmetrical Subharmonics and Interharmonics

open access: yesEnergies, 2022
Sinusoidal voltage fluctuations can be considered a specific result of the occurrence of voltage subharmonics and interharmonics, which are components of low frequency or not being an integer multiple of the frequency of the fundamental voltage harmonic.
Piotr Gnaciński   +4 more
doaj   +1 more source

Acoustic Tracking of Pitch, Modal, and Subharmonic Vibrations of Vocal Folds in Parkinson’s Disease and Parkinsonism

open access: yesIEEE Access, 2019
The prominent and early presence of dysphonia is considered a valuable marker for differentiation of idiopathic Parkinson's disease and parkinsonian syndromes.
Jan Hlavnicka   +4 more
doaj   +1 more source

SiC-MOSFET shunt active power filter based on half-cycle SDFT and repetitive control

open access: yesEnergy Reports, 2021
The switching frequency of traditional active power filter (APF) is usually between 10 kHz and 20 kHz. To better suppress switching subharmonics, the output filters of APFs usually use LCL-filters.
Xiao Guo, Hongyi Lin, Guozhu Chen
doaj   +1 more source

Power Balanced Adjustment of Quad-Inverter Installation with Modified Discontinuous PWM [PDF]

open access: yesProblems of the Regional Energetics, 2019
Purpose of this work is in the development and modification of control scheme and of basic algorithms of discontinuous space-vector modulation for synchronous and balanced regulation of multi-inverter topology of six-phase open-end winding installation ...
Oleschuk V., Ermuratskii V.
doaj   +1 more source

An optical and acoustic investigation of microbubble cavitation in small channels under therapeutic ultrasound conditions

open access: yesUltrasonics Sonochemistry, 2023
Therapeutic focused ultrasound in combination with encapsulated microbubbles is being widely investigated for its ability to elicit bioeffects in the microvasculature, such as transient permeabilization for drug delivery or at higher pressures to achieve
Xiaoxiao Zhao   +2 more
doaj   +1 more source

Induction Motor Under Unbalanced Voltage Subharmonics

open access: yesIEEE Access
In addition to fundamental harmonics, the voltage waveform may contain various undesirable components, including subharmonics (subsynchronous interharmonics) and interharmonics (SaIs), which are components with frequencies less than or not an integer ...
Piotr Gnacinski   +3 more
doaj   +1 more source

The 40-Hz auditory steady-state response enhanced by beta-band subharmonics

open access: yesFrontiers in Neuroscience, 2023
The 40-Hz auditory steady-state response (ASSR) has received special attention as an index of gamma oscillations owing to its association with various neuropsychiatric disorders including schizophrenia.
Shunsuke Sugiyama   +8 more
doaj   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

open access: yesAdvanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Families of subharmonic functions and separately subharmonic functions

open access: yesComplex Variables and Elliptic Equations, 2019
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openaire   +2 more sources

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