Results 1 to 10 of about 703,957 (311)

Pseudosymmetric Spaces as Generalization of Symmetric spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2023
In this paper, the concept of a pseudosymmetric space which is a natural generalization of the concept of a symmetric space is defined. All basic concepts such as the Luxemburg representation theorem, the Boyd indices, the fundamental function and its ...
Bilal Bilalov   +3 more
doaj   +1 more source

$L_{p;r} $ spaces: Cauchy Singular Integral, Hardy Classes and Riemann-Hilbert Problem in this Framework [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2019
In the present work the space  $L_{p;r} $ which is continuously embedded into $L_{p} $  is introduced. The corresponding Hardy spaces of analytic functions are defined as well. Some properties of the functions from these spaces are studied.
Ali Huseynli, Asmar Mirzabalayeva
doaj   +1 more source

CRP, PCT, and D-dimer as Biomarkers for Disease Severity in COVID-19 Patients: A Retrospective Study in Kinshasa, Democratic Republic of Congo

open access: yesJournal of Biostatistics and Epidemiology, 2023
Background: The COVID-19 pandemic has had a significant impact on global health, resulting in more than 6 million reported deaths worldwide as of April 2023.
Tasnime Hamdeni   +3 more
doaj   +1 more source

Influence of rotor excitation source model in electromagnetic field–circuit coupling analysis model of tubular hydro‐generator on no‐load voltage waveform and damper winding loss calculation results

open access: yesIET Electric Power Applications, 2023
In this study, a 34‐MW tubular hydro‐generator was selected as the study example. For the electromagnetic field–circuit coupling analysis model, the effects of the ideal DC voltage and current sources (i.e. two models of the rotor excitation power supply)
Shi‐fu Gu   +5 more
doaj   +1 more source

A new approach for harmonic detection based on eliminating oscillatory coupling effects in microgrids

open access: yesIET Renewable Power Generation, 2023
The primary goal of grid‐connected microgrids is to control the active and reactive power, which is reachable by the inner current control loop in the control structure of power converters.
Mojtaba Ahmadi   +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

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

On bases from cosines in Lebesgue spaces with variable summability index

open access: yesJournal of Inequalities and Applications, 2016
In this paper the perturbed system of cosines is considered. Under certain conditions on the summability index p ( ⋅ ) $p (\cdot )$ and perturbation, the basicity of this system in Lebesgue spaces L p ( ⋅ ) ( 0 , π ) $L_{p (\cdot )} (0,\pi )$ with ...
Togrul Muradov, Chingiz Hashimov
doaj   +1 more source

Multiple harmonic sources identification including inverter‐based distributed generations using empirical Fourier decomposition

open access: yesIET Generation, Transmission & Distribution, 2023
This paper proposes an intelligent approach based on the empirical Fourier decomposition (EFD) to identify harmonic sources at the point of common coupling (PCC) when different inverter‐based distributed generations (DGs) like microturbine (MT), battery ...
Shayan Z. T. Motlagh   +1 more
doaj   +1 more source

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