Intra-Abdominal Hemorrhage Control: The Need for Routine Four-Quadrant Packing Explored
Sign Up to like & getrecommendations! Published in 2021 at "World Journal of Surgery"
DOI: 10.1007/s00268-020-05906-3
Abstract: Routine four-quadrant packing (4QP) for hemorrhage control immediately upon opening is a standard practice for acute trauma laparotomy. The aim of this study was to evaluate the utility of 4QP for bleeding control in acutely… read more here.
Keywords: routine four; bleeding; hemorrhage; trauma laparotomy ... See more keywords
Time response enhancement for variable speed drive systems by using five-level cascade four quadrant chopper in dc-link
Sign Up to like & getrecommendations! Published in 2020 at "Heliyon"
DOI: 10.1016/j.heliyon.2020.e04739
Abstract: This research introduces a filtering circuit design integrated with the DC-link of a medium power variable speed drive (VSD) system. The designed filtering circuit employs modern power electronic circuits to improve time response characteristics in… read more here.
Keywords: four quadrant; time response; quadrant chopper; level ... See more keywords
Four-quadrant sensorless control in switched reluctance machine drive using pulse injection based on special flux linkage curves
Sign Up to like & getrecommendations! Published in 2017 at "Iet Electric Power Applications"
DOI: 10.1049/iet-epa.2017.0190
Abstract: This study presents four-quadrant sensorless control in switched reluctance machine (SRM) drive for startup and low speed. The proposed control method is based on two special flux linkage-current characteristic curves which can be obtained expediently… read more here.
Keywords: control; flux linkage; four quadrant; quadrant sensorless ... See more keywords
Integrated on-chip silicon plasmonic four quadrant detector for near infrared light
Sign Up to like & getrecommendations! Published in 2018 at "Applied Physics Letters"
DOI: 10.1063/1.5050340
Abstract: The ability to accurately track light beams in a given space is highly desired for myriad applications e.g., laser cutting, welding, interferometry, sensing, optical tweezers, free space optical communications, and more. Typically, achieving this goal… read more here.
Keywords: photodetector; short wave; accurately track; silicon ... See more keywords
Double Integral Sliding Mode Control of Continuous Gain Four Quadrant Quasi-Z-Source Converter
Sign Up to like & getrecommendations! Published in 2018 at "IEEE Access"
DOI: 10.1109/access.2018.2884092
Abstract: A constant frequency double-integral sliding mode controller (DISMC) is proposed for the regulation of a four-quadrant continuous gain dc–dc converter based on quasi- $Z$ -source (ZS) topology. No controller has yet been proposed for the… read more here.
Keywords: sliding mode; four quadrant; control; converter ... See more keywords
A Four-Quadrant Single-Phase Grid-Connected Converter With Only Two High-Frequency Switches
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2019.2903777
Abstract: This paper presents a new four-quadrant (4Q) boost-type converter with the use of active virtual ground (AVG) technology. The presented topology can step up the ac grid voltage to a regulated dc voltage under a… read more here.
Keywords: two high; converter; high frequency; frequency switches ... See more keywords
High-Dynamic Four-Quadrant Speed Adjustment of Switched Reluctance Machine With Torque Predictive Control
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2021.3108707
Abstract: This article proposes a four-quadrant operation strategy of the switched reluctance machine (SRM) for the high-dynamic speed control, and the core of the strategy is a PWM-based predictive control method with the online adaptive phase… read more here.
Keywords: speed; switched reluctance; high dynamic; control ... See more keywords
Improved algorithm for expanding the measurement linear range of a four-quadrant detector.
Sign Up to like & getrecommendations! Published in 2019 at "Applied optics"
DOI: 10.1364/ao.58.007741
Abstract: A four-quadrant detector is a kind of photoelectric detector that can quickly and accurately measure the incident angle of light. However, its ability to measure in a large field of view (FOV) is limited by… read more here.
Keywords: range; quadrant detector; detector; measurement ... See more keywords
Adaptive Control of Four-Quadrant DC-DC Converters in Both Discontinuous and Continuous Conduction Modes
Sign Up to like & getrecommendations! Published in 2020 at "Energies"
DOI: 10.3390/en13164187
Abstract: The inherently different dynamics of a DC-DC converter while operating in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) necessitate an advanced controller to control the inductor current. A conventional PI controller cannot… read more here.
Keywords: adaptive control; continuous conduction; controller; converter ... See more keywords