Results 11 to 20 of about 23,396,150 (160)

Designing Passive Harmonic Filter of Electric Propulsion System on Tanker Ship [PDF]

open access: yes, 2018
Harmonic is a frequency defect that have some negative effect to the electrical network system. In a ship, electrical network system are interconnected to each other to another electrical consumer device.
Zaman, Muhammad Badrus; Department of Marine Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember, Surabaya 60111   +3 more
core   +1 more source

Fractional Fourier transforms, harmonic oscillator propagators and Strichartz estimates on Pilipovic and modulation spaces [PDF]

open access: yes, 2023
We show that harmonic oscillator propagators and fractional Fourier transforms are essentially the same. We deduce continuity properties and fix time estimates for such operators on modulation spaces, and apply the results to prove Strichartz estimates ...
Manna, Ramesh   +9 more
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

Fast-individual-harmonic-extraction technique [PDF]

open access: yes, 2005
One outcome of a PhD project (C H Ng, University studentship) A collaborative work (the Energy Systems Group, Northumbria and Durham University). It deals with the problem of harmonic suppression or elimination in power systems for safety and power ...
Busawon, Krishna   +3 more
core   +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

Non-Uniform Time Sampling for Multiple-Frequency Harmonic Balance Computations [PDF]

open access: yes, 2013
A time-domain harmonic balance method for the analysis of almost-periodic (multi-harmonics) flows is presented. This method relies on Fourier analysis to derive an efficient alternative to classical time marching schemes for such flows.
Dufour, Guillaume   +5 more
core   +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

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

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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