Results 21 to 30 of about 1,252,987 (207)

Influence of Harmonic and DC-Bias Coupling on Transformer Energization Inrush Current in Complex Power Grids

open access: yesEnergies
The methodological innovation of this study is a phase-domain separation-and-recombination framework that maps harmonic voltage to prospective flux, maps controlled quasi-DC winding current to magnetic operating-point displacement, and then resolves ...
Junchi He   +10 more
doaj   +1 more source

Power Transformer Inrush Current Analysis: Simulation, Measurement and Effects

open access: yesApplied Sciences
Inrush current is still a persistent problem affecting the quality of the power system. This paper presents the theoretical aspects of this transient phenomenon, the simulation of the phenomenon for prediction purposes and its measurement in a test ...
Maria-Cristina Nițu   +3 more
doaj   +1 more source

Prediction of Transformer Residual Flux Based on J-A Hysteresis Theory

open access: yesEnergies
Circuit breakers are effectively utilized for the controlled switching technique to mitigate inrush current when energizing an unloaded transformer. The core of the controlled switching technique is to obtain the appropriate closing angle based on the ...
Qi Long   +7 more
doaj   +1 more source

Factors influencing the dissolution rate of residual DNAPL in unconnected pores based on PIV technology

open access: yes地质科技通报, 2023
Objective The leakage of dense nonaqueous phase liquids (DNAPL) with a density greater than that of water into the underground environment becomes a long-term pollution source.
Boyang Ruan   +3 more
doaj   +1 more source

Comparison of Measured Residual Stress Distributions in Extra-Thick Butt Welds Joined by One-Pass EGW and Multipass FCAW

open access: yesAdvances in Mechanical Engineering, 2014
This study is to measure the welding residual stress distributions in a 70 mm-thick butt weld by one-pass electron gas welding using both the inherent strain method and neutron diffraction method, respectively.
Jeong-Ung Park   +4 more
doaj   +1 more source

A solution for the neutron diffusion equation in the spherical and hemispherical reactors using the residual power series

open access: yesFrontiers in Physics, 2023
A novel analytical solution to the neutron diffusion equation is proposed in this study using the residual power series approach for both spherical and hemispherical fissile material reactors.
Ahmad El-Ajou   +4 more
doaj   +1 more source

Impact of post-field data processing on eddy covariance flux estimates and energy balance closure

open access: yesMeteorologische Zeitschrift, 2006
This study evaluates the impact of post-field data processing methods on eddy covariance flux estimates and the resulting energy balance residual. To that end, a dataset from the LITFASS-2003 field campaign was analysed using an experimental software ...
Matthias Mauder, Thomas Foken
doaj   +1 more source

Early Body Mass Index z‐Score Change and Resolution of Severe Malnutrition in Children With Sickle Cell Anemia in a Low‐Income Setting: A Prospective Single‐Arm Extension Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Children with sickle cell anemia (SCA) in low‐income settings are at risk of severe malnutrition, but optimal nutritional management has not been established. We evaluated an intensified ready‐to‐use therapeutic food (RUTF) regimen in children with persistent severe malnutrition after initial treatment and assessed whether early ...
Safiya Gambo   +9 more
wiley   +1 more source

Sensible and latent heat flux from radiometric surface temperatures at the regional scale: methodology and validation [PDF]

open access: yes, 2009
The CarboEurope Regional Experiment Strategy (CERES) was designed to develop and test a range of methodologies to assess regional surface energy and mass exchange of a large study area in the south-western part of France.
Brunet, Y.   +9 more
core   +1 more source

A large-eddy simulation exploration of the assumptions used in retrieving entrainment from a mixing diagram approach with ground-based remote sensors [PDF]

open access: yesAtmospheric Measurement Techniques
Entrainment is a crucial component of the atmospheric boundary layer (BL) moisture and heat budget. While usually thought of as only entrainment flux, entrainment within the mixed layer budget equation is really composed of two terms: the flux of a ...
T. E. Rosenberger   +7 more
doaj   +1 more source

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