Results 31 to 40 of about 1,996 (169)

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

Global structure of subharmonics in a class of periodic predator-prey models

open access: yes, 2019
This paper ascertains the global topological structure of the set of subharmonics of arbitrary order of the periodic predator-prey model introduced in López-Gómez et al (1996 Adv. Differ. Equ. 1 403–23).
Eduardo Muñoz-Hernández   +3 more
core   +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

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

Cyclotron subharmonics resonant (CSR) heating

open access: yes, 1994
The cyclotron subharmonics resonant (CSR) heating mechanism is studied using particle simulation codes with an emphasis on the relationship between CSR and the nonlinear Landua ...
Abe, H.
core   +1 more source

Bifurcations of subharmonics [PDF]

open access: yes, 1986
We consider a piecewise linear second order ordinary differential equation which is topologically equivalent to the sine-Gordon equation. The system is subjected to a time harmonic disturbance and the behavior of the periodic solutions is examined. It is
Chow, S.N, Shaw, S.W
core   +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

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

open access: yes, 2021
This contribution analyzes the existence of $nT$-periodic coexistence states, for $n\geq1$, in two classes of non-autonomous predator-prey Volterra systems with periodic coefficients.
Muñoz Hernández, Eduardo   +1 more
core   +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

Decoding Finely Tuned Gamma Oscillations in Chronic Deep Brain Stimulation for Parkinson's Disease

open access: yesMovement Disorders, EarlyView.
Abstract Background Finely tuned Gamma (FTG) activity—spontaneous narrowband Gamma oscillations (sFTG) or entrained to half the stimulation frequency (eFTG)—is typically linked to on‐medication states and dyskinesia in Parkinson's disease (PD), making it a potential physiomarker for adaptive deep brain stimulation (aDBS).
Marjolein Muller   +8 more
wiley   +1 more source

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