Results 41 to 50 of about 9,766 (262)
Advanced Engineering Materials, EarlyView.Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch +3 more
wiley +1 more source
Impacts on Power Factor of AC Voltage Controllers Under Non-Sinusoidal Conditions [PDF]
Mehran University Research Journal of Engineering and Technology, 2012 AC-AC conversion is obtained with the help of Cyclo-converters, DC Link converters and AC Voltage Controllers. AC voltage controllers are also referred to as voltage regulators.
Mukhtiar Ahmed Mahar +2 more
doaj
A High Quality Output Voltage for HEPWM of Single Phase AC Motor Drive [PDF]
Engineering and Technology Journal, 2009 provide the exact on-line solution to the optimal PWM problem. The proposedalgorithm optimization technique is applied to a 3-level unipolar single-phase inverter todetermine optimum switching angles for eliminating low order harmonics while ...
Jamal A. Mohammed +2 more
doaj +1 more source
Energies, 2021 In this paper the results of the tests of the wideband transformation accuracy of medium voltage (MV) inductive voltage transformers (VTs) in the frequencies range from 50 Hz up to 5 kHz are presented.
Michal Kaczmarek, Ernest Stano
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Advanced Engineering Materials, EarlyView.Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley +1 more source
DFIG Harmonic Current Controlling with the Grid Low Harmonic Voltage
Research Journal of Applied Sciences, Engineering and Technology, 2014 This study presents a vector control strategy based on stator harmonic current closed-loop, it adds individually the control loop about of each stator harmonic current to restrain the stator harmonic current, in order to meet the THD criteria. The control strategy of restraining the harmonic current presents the design of the stator harmonic current ...
Huan Wang, Lei Pan
openaire +1 more source
Mitigation of voltage and current harmonics in grid-connected microgrids [PDF]
2012 IEEE International Symposium on Industrial Electronics, 2012 In this paper, a control approach is proposed for selective compensation of main voltage and current harmonics in grid-connected microgrids. Two modes of compensation are considered, i.e. voltage and current compensation modes. In the case that sensitive loads are connected to the point of commoncoupling (PCC), voltage compensation mode is activated in
Mehdi Savaghebi +3 more
openaire +2 more sources
Advanced Engineering Materials, EarlyView.Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali +5 more
wiley +1 more source
Molecular Adsorbing Host•Guest (MAHG) Crystals: A New Paradigm for Porous Materials?
Advanced Functional Materials, EarlyView.Networking! Introduction of guest molecules in macrocycles before crystallization profoundly influences the material obtained in terms of structure and function. Beside simplicity and porous space improvement, this approach is endowed with a huge potential given the myriad of potential guest molecules that can be used to tune this burgeoning class of ...
Ingrid Suzana +4 more
wiley +1 more source
The influence of the network asymmetry on the settings and sensitivity of an earth fault protection using higher harmonics [PDF]
E3S Web of Conferences, 2019 Detection of high resistance earth faults in medium voltage networks is an important problem due to ineffectiveness of traditional earth fault protections.
Marciniak Lubomir, Piątek Mateusz
doaj +1 more source