Results 11 to 20 of about 692,979 (283)

On Onesided Harmonic Analysis [PDF]

open access: yesProceedings of the American Mathematical Society, 1980
It is shown that, in locally compact groups satisfying the onesided version of the Wiener property introduced by Leptin, characters of closed subgroups have always continuous positive definite extensions onto the whole group. We give a quick proof that for such groups the connected component of the identity is the direct product of a compact group and ...
openaire   +2 more sources

Resonator-based metering of power components according to IEEE Standard 1459-2010 [PDF]

open access: yesJournal on Processing and Energy in Agriculture, 2021
This paper proposes an accurate and computationally efficient implementation of the IEEE Std. 1459-2010 for power measurements. An implementation is based on digital resonators embedded in a feedback loop. In the first algorithm stage, the unknown signal
Kušljević Miodrag   +2 more
doaj   +1 more source

On some aspects of the dynamic behavior of the softening Duffing oscillator under harmonic excitation [PDF]

open access: yes, 2016
The Duffing oscillator is probably the most popular example of a nonlinear oscillator in dynamics. Considering the case of softening Duffing oscillator with weak damping and harmonic excitation and performing standard methods like harmonic balance or ...
Lentz, Lukas, Wagner, Utz von
core   +1 more source

Harmonic-Modal Hybrid Reduced Order Model for the Efficient Integration of Non-Linear Soil Dynamics

open access: yesApplied Sciences, 2020
Nonlinear behavior of soils during a seismic event has a predominant role in current site response analysis. Soil response analysis, and more concretely laboratory data, indicate that the stress-strain relationship of soils is nonlinear and exhibits ...
Claudia Germoso   +2 more
doaj   +1 more source

Bases of exponents with a piecewise linear phase in generalized weighted Lebesgue space

open access: yesJournal of Inequalities and Applications, 2016
The perturbed system of exponents with a piecewise linear phase, consisting of eigenfunctions of a discontinuous differential operator, is considered in this work.
Tofig Najafov   +2 more
doaj   +1 more source

SCALE FACTOR DETERMINATION METHOD OF ELECTRO-OPTICAL MODULATOR IN FIBER-OPTIC GYROSCOPE [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2016
Subject of Research. We propose a method for dynamic measurement of half-wave voltage of electro-optic modulator as part of a fiber optic gyroscope. Excluding the impact of the angular acceleration o​n measurement of the electro-optical coefficient is ...
A. S. Aleynik   +4 more
doaj   +1 more source

The Design of Special Singlewinding Twospeed Motor for Contrarotating Axialflow Fan

open access: yesJournal of Harbin University of Science and Technology, 2020
Aiming at the problems of the pressure rise and power imbalance and the problem of serious reduction of efficiency when the contrarotating axial flowfan deviates from the rated operating point,the twostage drive motor of the fan is studiedIn this paper ...
MENG Dawei   +3 more
doaj   +1 more source

A Review of Total Harmonic Distortion Factors for the Measurement of Harmonic and Interharmonic Pollution in Modern Power Systems

open access: yesEnergies, 2021
Harmonic distortion is one of the disturbances that most affects the quality of the electrical system. The widespread use of power electronic systems, especially power converters, has increased harmonic and interharmonic emission in a wide range of ...
Angel Arranz-Gimon   +3 more
doaj   +1 more source

Harmonic Analysis in One-Parameter Metabelian Nilmanifolds [PDF]

open access: yes, 2011
Let $G$ be a connected, simply connected one-parameter metabelian nilpotent Lie group, that means, the corresponding Lie algebra has a one-codimensional abelian subalgebra. In this article we show that $G$ contains a discrete cocompact subgroup.
Ghorbel, Amira
core   +5 more sources

Optimizing performance of a reduced switch multi‐level inverter with moth‐flame algorithm and SHE‐PWM

open access: yesThe Journal of Engineering, 2023
Multi‐level inverters are widely used in high‐voltage and high‐power applications due to the increasing demand for renewable energy. This study proposes a novel single‐phase reduced switch multi‐level inverter topology that generates 11 levels of output ...
Ibrahim Haruna Shanono   +3 more
doaj   +1 more source

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