Results 1 to 10 of about 504,253 (264)

Four-Leg Sustained Dynamic Compression Staple and Screw Generates Superior Lapidus Construct as Compared to Plate and Screw: A Biomechanical Study [PDF]

open access: yesFoot & Ankle Orthopaedics, 2023
Category: Ankle; Basic Sciences/Biologics Introduction/Purpose: Lapidus procedures are frequently used to treat moderate to severe hallux valgus in the setting of first tarsometatarsal instability or arthritis.
David Safranski PhD   +5 more
doaj   +2 more sources

Four-Legged Recycling Machines [PDF]

open access: yesJournal of the Northeastern Agricultural Economics Council, 1972
Society's growing concern over environmental pollution has forced American industry to reevaluate its methods of waste disposal. No longer is it socially acceptable or, in many cases, legal to dump untreated by-products into the air, on the land, or into the rivers.
Benson, Fred J., Stinson, Walter P.
openaire   +3 more sources

AC Current Ripple in Three-Phase Four-Leg PWM Converters with Neutral Line Inductor

open access: yesEnergies, 2021
This paper presents a comprehensive study of peak-to-peak and root-mean-square (RMS) values of AC current ripples with balanced and unbalanced fundamental currents in a generic case of three-phase four-leg converters with uncoupled AC interface inductors
Aleksandr Viatkin   +4 more
doaj   +1 more source

A Generalized Approach for Determining the Current Ripple RMS in Four-Leg Inverters with the Neutral Inductor

open access: yesEnergies, 2023
This manuscript proposes a novel approach for determining phase and neutral-current-ripple RMS in grid-connected four-leg inverters with the neutral inductor.
Riccardo Mandrioli   +3 more
doaj   +1 more source

Performance Comparisons of Three-Phase/Four-Wire Model Predictive Control-Based DC/AC Inverters Capable of Asymmetric Operation for Wave Energy Converters

open access: yesEnergies, 2022
A study on the capacity increase of a power converter according to the increase in the single capacity of wave energy converters and four-leg topology that can supply stable power even under unbalanced load conditions during independent operation is ...
Chan Roh
doaj   +1 more source

An Overview of Four-Leg Converters: Topologies, Modulations, Control and Applications

open access: yesIEEE Access, 2022
In three-phase unbalanced systems, where the circulation of zero sequence current is necessary, four-leg converters provide a neutral connection for single-phase or other unbalanced loads typically utilized in three-phase distribution systems.
Felix Rojas   +7 more
doaj   +1 more source

A Comprehensive AC Current Ripple Analysis and Performance Enhancement via Discontinuous PWM in Three-Phase Four-Leg Grid-Connected Inverters

open access: yesEnergies, 2020
A complete analysis of the ac output current ripple in four-leg voltage source inverters considering multiple modulation schemes is provided. In detail, current ripple envelopes and peak-to-peak profiles have been determined in the whole fundamental ...
Riccardo Mandrioli   +4 more
doaj   +1 more source

Two new genera and four new species of Asterocheridae (Copepoda: Siphonostomatoida) associated with sponges (Porifera) from the Korean East Sea [PDF]

open access: yesPeerJ, 2023
Two new genera and four new species of siphonostomatoid copepods of the family Asterocheridae associated with sponges are described from the Korean East Sea (Sea of Japan).
Il-Hoi Kim, Taekjun Lee
doaj   +2 more sources

Four Legs Good … [PDF]

open access: yesPerformance Research, 2018
Thinking and talking about walking while on the move, Dee Heddon & Claire Cunningham reflect on what it is to walk, on what it takes to take a walk and the different ways in which walking is performed across and through different bodies and terrains.
Cunningham, Claire, Heddon, Dee
openaire   +1 more source

Sliding mode controller for four leg shunt active power filter to eliminating zero sequence current, compensating harmonics and reactive power with fixed switching frequency [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2015
In this paper, the four leg inverter controlled by the three dimensional space vector modulation (3D SVM) is used as the shunt active power filter (SAPF) for compensating the three phase four wire electrical network, by using the four leg ...
Chebabhi Ali   +3 more
doaj   +1 more source

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