Results 101 to 110 of about 74,055 (309)

High-frequency modelling of a three-phase pulse width modulation inverter towards the dc bus considering line and controller harmonics

open access: yesThe Journal of Engineering, 2014
Closed-form analytical formulas are provided to calculate the dc bus harmonics of a three-phase sinusoidal pulse width modulation (SPWM) inverter. The harmonic analysis is performed by using a double Fourier series approach to determine the dc bus ...
Saeid Haghbin   +2 more
doaj   +1 more source

Brune's Multiport Lumped Element Equivalent Circuits in Admittance Representation

open access: yes, 2013
A systematic algorithm for the lumped element equivalent circuit synthesis of admittance matrix of functions of complex frequency is presented. This work complements the previous work on impedance matrices by introduction of two new Brune's circuits ...
Mukhtar, F.; Russer, P.
core   +1 more source

Tuning Separator Chemistry: Improving Zn Anode Compatibility via Functionalized Chitin Nanofibers

open access: yesAdvanced Functional Materials, EarlyView.
Nanochitin derived from waste shrimp shells is used to fabricate separators for aqueous zinc batteries. By tuning the density of amine and carboxylic surface groups, water mobility at the separator interface is controlled, promoting uniform zinc deposition, suppressing dendrite growth, and enabling exceptional cycling stability exceeding 2000 h ...
Ibrahim Al Kathemi   +6 more
wiley   +1 more source

Automated design tools for piezoelectric transformer-based power supplies

open access: yesThe Journal of Engineering, 2019
This paper proposed a design approach for piezoelectric-transformer-based power supplies. Initially, an analytical approach is used to derive the Mason equivalent circuit parameters of a PT.
Jack Forrester   +4 more
doaj   +1 more source

Equivalent Quantum Circuits

open access: yes, 2011
12 pages. Tutorial on quantum circuit analysis. Graphical point of view based on circuit equivalences.
Garcia-Escartin, Juan Carlos   +1 more
openaire   +2 more sources

Nyquist diagrams and equivalent electrical circuits.

open access: yes, 2013
A) Nyquist diagram of an impedance spectrum calculated for circuits depicted in (C) and (D). Data points, •, were calculated using 42 different frequencies between 1.3 Hz to 16 kHz. x-intercepts at low frequencies (f→0) correspond to the total epithelial
Martin Bogdan (283263)   +2 more
core   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

open access: yesAdvanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf   +4 more
wiley   +1 more source

Coherency Identification of Generators Using a PAM Algorithm for Dynamic Reduction of Power Systems

open access: yesEnergies, 2012
This paper presents a new coherency identification method for dynamic reduction of a power system. To achieve dynamic reduction, coherency-based equivalence techniques divide generators into groups according to coherency, and then aggregate them.
Seung-Il Moon, Jin-Woo Park, Gi-Chan Pyo
doaj   +1 more source

Solution‐Processed Thin‐Film Transistors With Tunable Temporal Dynamics for Neuromorphic Computing

open access: yesAdvanced Functional Materials, EarlyView.
Solution‐processed CNT and CNT/P3HT ion‐gated transistors exhibit materials‐defined synaptic timescales: fast CNT devices for high‐frequency spiking and slow hybrid devices for temporal integration. Embedding these dynamics into coupled reservoir‐computing and spiking neural network simulations reveals that a Hybrid‐Reservoir / CNT‐SNN architecture ...
Kevin Schnittker   +5 more
wiley   +1 more source

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