Results 61 to 70 of about 581 (271)
The Journal of Engineering, 2019 A novel static synchronous compensator (STATCOM) based on hybrid cascaded multi-level converter (HCMC) is presented in this study, i.e HCMC-STATCOM, which combines the advantages of the traditional two-level converter and cascaded H-bridge converter ...
Yi Du +4 more
doaj +1 more source
Transformer‐less unified power flow controller in medium voltage distribution networks
IET Generation, Transmission & Distribution, 2023 A transformer‐less unified power flow controller (UPFC) is a power electronic device consisting of series and shunt voltage source converters (VSCs) that are not connected to a common DC bus.
Mohamed A. Abdelrahman +4 more
doaj +1 more source
Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis
FEBS Letters, EarlyView.Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee +7 more
wiley +1 more source
Development of a Low Inductance Linear Alternator for Stirling Power Convertors [PDF]
, 2017 The free-piston Stirling power convertor is a promising technology for high efficiency heat-to-electricity power conversion in space. Stirling power convertors typically utilize linear alternators for converting mechanical motion into electricity.
Geng, Steven M., Schifer, Nicholas A.
core +1 more source
IET Power ElectronicsTo solve the commutation failure (CF) issues in high voltage direct current (HVDC) transmission systems based on line commutated converter (LCC), this paper proposes a hybrid solution combining the LCC inverter with the continuously controlled IGCT‐based
Yindi Liu +3 more
doaj +1 more source
Novel protection method for VSC-HVDC transmission lines
The Journal of Engineering, 2019 The large shunt capacitances on both sides of VSC-HVDC transmission line will block and reflect the travelling waves when a fault occurs on DC cable lines.
Lingtong Jiang +5 more
doaj +1 more source
FEBS Letters, EarlyView.Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley +1 more source
Development of Electronic Load Controllers for Free-Piston Stirling Convertors Aided by Stirling Simulation Model [PDF]
, 2004 The free-piston Stirling convertor end-to-end modeling effort at the NASA Glenn Research Center has produced a software-based test bed in which free-piston Stirling convertors can be simulated and evaluated.
Regan, Timothy F.
core +1 more source
Control scheme for multi-terminal VSC-based medium-voltage DC distribution networks
The Journal of Engineering, 2019 With the development and application of voltage source converter (VSC) high voltage direct current (HVDC) technology, DC distribution is gradually attracting the attention of researchers in recent years. However, many studies are still in the theoretical
Yirun Ji +6 more
doaj +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source