Results 1 to 10 of about 10,144,462 (296)

Point-Wise Phase Estimation Method in Fringe Projection Profilometry under Non-Sinusoidal Distortion [PDF]

open access: yesSensors, 2022
In fringe projection profilometry, high-order harmonics information of distorted fringe will lead to errors in the phase estimation. In order to solve this problem, a point-wise phase estimation method based on a neural network (PWPE-NN) is proposed in ...
Zhuoyi Yin   +4 more
doaj   +2 more sources

Signal Retrieval from Non-Sinusoidal Intensity Modulations in X-ray and Neutron Interferometry Using Piecewise-Defined Polynomial Function [PDF]

open access: yesJournal of Imaging, 2021
Grating-based phase-contrast and dark-field imaging systems create intensity modulations that are usually modeled with sinusoidal functions to extract transmission, differential-phase shift, and scatter information.
Simon Pinzek   +6 more
doaj   +2 more sources

Non-sinusoidal Waveform in Temperature-Compensated Circadian Oscillations. [PDF]

open access: yesBiophys J, 2019
Time series of biological rhythms are of various shapes. Here, we investigated the waveforms of circadian rhythms in gene-protein dynamics using a newly developed, to our knowledge, index to quantify the degree of distortion from a sinusoidal waveform.
Gibo S, Kurosawa G.
europepmc   +4 more sources

Traceability of Voltage Measurements for Non-Sinusoidal Waveforms [PDF]

open access: yesMeasurement Science Review, 2010
This paper describes the result of work performed at the Laboratoire National de Metrologie et d’Essais (LNE) aiming at developing a standard system to measure RMS value and harmonic contents of distorted voltage waveforms by means of a sampling voltmeter. Thermal converters are used to trace the RMS value to the SI units. The error of the DVM has been
Espel P., Poletaeff A., Ndilimabaka H.
doaj   +2 more sources

Exercise Intolerance in Young Physically Active Smokers Compared to Non‐Smokers During Sinusoidal Cycling [PDF]

open access: yesEuropean Journal of Sport Science
The impact of cigarette smoking on the cardiorespiratory response to exhaustive exercise remains unclear. This study investigated the smoking effect on exercise tolerance by analyzing the cardiorespiratory and metabolic variables during an exhausting ...
Marta Borrelli   +8 more
doaj   +2 more sources

Non-Parametric Kinematic Optimization of Flapping Foil Propulsion Using a Discrete Adjoint Method [PDF]

open access: yesBiomimetics
Optimizing flapping-foil kinematics for underwater propulsion is challenging due to strong temporal coupling and nonlinear fluid–structure interactions. Most existing approaches rely on parameterized motion profiles, which restrict the accessible design ...
Zhaoran Yin   +4 more
doaj   +2 more sources

Numerical Analysis of the Effect of the Non-Sinusoidal Trajectories on the Propulsive Performance of a Bionic Hydrofoil [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2022
Aquatic animals usually generate the effective propulsive force via non-sinusoidally flapping their fins. Inspired by the kinematics of fish, the propulsive characteristics of a NACA012 hydrofoil is numerically studied in this paper.
F. Li, P. Yu, N. Deng, G. Li, X. Wu
doaj   +1 more source

Electric Power Loss Minimization in Power Supply Systems for the Suburban Houses [PDF]

open access: yesProblems of the Regional Energetics, 2018
The main purpose of the research is the development and improvement of methods for minimizing power losses for non-sinusoidal and asymmetric modes of operation of power supply systems for suburban houses.
Averbukh М.А.   +2 more
doaj   +1 more source

Method of calculating the distortion coefficient sinusoidality of the voltage curve created by three-phase straight lines

open access: yesВестник Самарского государственного технического университета. Серия: Технические науки, 2021
The existing calculation methods in various sources represent rectifier installations as sources of higher harmonics. In this case, the current value of the primary winding of the transformer in the form of rectangles is decomposed into a Fourier series ...
Vyacheslav S. Osipov
doaj   +1 more source

Methodological approach to assessing additional active power losses in overhead power lines at non-sinusoidal modes [PDF]

open access: yesE3S Web of Conferences, 2023
Non-sinusoidal voltage in electrical networks is one of the most pressing problems in the field of power quality. In non-sinusoidal modes in electrical networks, in addition to losses of active power at the fundamental frequency, i.e.
Kovernikova Lidiia
doaj   +1 more source

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