Results 11 to 20 of about 925 (179)

Role of harmonics and subharmonics in peripheral pulse analysis

open access: yesMGM Journal of Medical Sciences, 2020
Elastic compliance of the blood vessels contributes high-frequency components in the peripheral pulse, which are analyzed with the help of the power spectral density of the signal.
G D Jindal   +3 more
doaj   +1 more source

Use of Subharmonics of Base Frequencies in the CSRMT Method with Loop Sources

open access: yesJ, 2023
In the controlled source radiomagnetotelluric (CSRMT) sounding method, a horizontal magnetic dipole, HMD (vertical loop) or a horizontal electric dipole, and HED (grounded line) are used as sources.
Alexander K. Saraev   +2 more
doaj   +1 more source

Separately subharmonic functions need not be subharmonic [PDF]

open access: yesProceedings of the American Mathematical Society, 1988
We give an example of a separately subharmonic function which is not subharmonic.
openaire   +1 more source

Preliminary Study of a 200-KW Induction Motor Supplied with Voltages Containing Subharmonics

open access: yesScientific Journal of Gdynia Maritime University, 2019
This work deals with the preliminary investigations of a 200-kW induction cage motor with a supply voltage featuring subharmonic injection. The results of the field calculations in the MAXWELL environment are presented for subharmonics of various ...
Piotr Gnaciński, Piotr Klimczak
doaj   +1 more source

Analysis of Auto Parametric Oscillations at the Subharmonic Frequency in Two-Phase Ferro Resonance Circuits

open access: yesProceedings of the International Conference on Applied Innovations in IT, 2023
Oscillatory processes in nonlinear multiphase electro ferromagnetic circuits (EFMC) have an exceptional variety and complexity, and therefore their research is also associated with solving complex physical problems.
Mukhtorhon Ibadullayev
doaj   +1 more source

Solar Rotational Oscillation and Its Subharmonics in Solar Wind Plasma Field, Geomagnetic, and Cosmic Ray Intensity Indicator in the Solar Cycle 24/25 Minimum

open access: yesEarth and Space Science, 2020
To study synodic period and its subharmonics, we have utilized hourly average data of solar wind plasma field, geomagnetic index, and galactic cosmic ray intensity along with 5 min average data of selected solar wind field parameters during the recent ...
Y. P. Singh
doaj   +1 more source

Impact of voltage subharmonics and interharmonics on currents in single-phase induction motors

open access: yesScientific Journal of Gdynia Maritime University, 2021
In very low power drives, a single-phase induction motor is used. This motor, like the 3-phase induction squirrel-cage motor, requires a voltage supply with suitable parameters – of suitable quality, in practice.
Marcin Pepliński
doaj   +1 more source

SUBHARMONIC AND STRONGLY SUBHARMONIC FUNCTIONS

open access: yes, 2022
"Science and innovation" international scientific journal.
openaire   +2 more sources

Influence of voltage subharmonics on induction motors of various efficiency classes

open access: yesScientific Journal of Gdynia Maritime University, 2020
Power quality disturbances related to voltage waveform distortions and effective value deviation are common in power systems. Apart from higher harmonics, subharmonics and interharmonics may also appear in voltage waveforms.
Marcin Pepliński
doaj   +1 more source

Dynamics of a mechanical system with nonlinear elastic suspension and spectral analysis of the results

open access: yesОмский научный вестник, 2023
The article considers the dynamics of a nonlinear mechanical system under the action of a kinematic perturbation on it. The object's vibration isolation system is described by a rigid cubic power characteristic and is based on compensation of external ...
V. A. Nekhaev   +3 more
doaj   +1 more source

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