Results 71 to 80 of about 189,788 (299)
Theoretical analysis and operation optimization of eddy current flaw detector sensor interface
Measurement + Control, 2023 The use of input devices of resonance-type in flaw detectors is advisable at frequencies above 100–200 kHz. However, in the practice of non-destructive testing by eddy currents, it is often necessary to use lower frequencies.
Y Bilik, M Haridim
doaj +1 more source
Advanced Functional Materials, EarlyView.This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari +4 more
wiley +1 more source
Performance of the battery energy storage systems based on cascaded H-bridge multilevel converter
The Journal of Engineering, 2019 The battery energy storage system (BESS) based on the cascaded multilevel converter, that consists of cascaded H-bridge converter, is one of the most promising and interesting options, which is taken to compensate the instability of electric power grid ...
Abuzaid Saeed Gadalla +2 more
doaj +1 more source
Less-conventional low-consumption galvanic separated MOSFET-IGBT gate drive supply [PDF]
, 2017 A simple half-bridge, galvanic separated power supply which can be short circuit proof is proposed for gate driver local supplies. The supply is made while hacking a common mode type filter as a transformer, as the transformer shows a good insulation, it
Bikorimana, Jean Marie Vianney +1 more
core +3 more sources
Advanced Functional Materials, EarlyView.Multi‐metal Cu─Ce─Ag nanoparticles harness synergistic interactions to drive efficient electrochemical CO2 reduction reaction toward C2+ products at high current densities. Ag enhances CO production, Ce modulates Cu oxidation states, and together they boost *CO coverage and local pH to enhance C─C coupling, enabling record C2+ yields with suppressed ...
Nini Zhang +9 more
wiley +1 more source
Multiple modular DC transformer for flexible HVDC application
The Journal of Engineering, 2019 This study proposes a novel multiple modular dc transformer (MMDCT) scheme for flexible high-voltage dc (HVDC) application. The MMDCT is composed of n consistent modular dual-active-bridge converters (MDABs), and every MDAB can work independently.
Qianhao Sun +4 more
doaj +1 more source
Optimizing Anharmonicity in Nanoscale Weak Link Josephson Junction Oscillators
, 2009 Josephson tunnel junctions are widely used as nonlinear elements in superconducting circuits such as low noise amplifiers and quantum bits. However, microscopic defects in the oxide tunnel barrier can produce low and high frequency noise which can ...
Cohen, Marvin L. +3 more
core +1 more source
Rectifying memristor bridge circuit realized with human skin [PDF]
Journal of Electrical Bioimpedance, 2018 Abstract It has been demonstrated before that human skin can be modeled as a memristor (memory resistor). Here we realize a memristor bridge by applying two voltages of opposite signs at two different skin sites. By this setup it is possible to use human skin as a frequency doubler and half-wave rectifier which is an application of the ...
openaire +5 more sources
Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges
Advanced Functional Materials, EarlyView.Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky +3 more
wiley +1 more source
Small power ZVS circuits for the marine-controlled source electromagnetic transmitter
The Journal of Engineering, 2019 Marine-controlled source electromagnetic transmitter is an important equipment for the investigation of marine geology and exploration of oil, gas, and mineral resources in recent years.
Hongxi Song +3 more
doaj +1 more source