Results 91 to 100 of about 64,210 (348)
Z‐Scheme Water Splitting Systems Based on Solid‐State Electron Conductors
Advanced Functional Materials, EarlyView.This review examines the latest advances in Z‐scheme overall water splitting (OWS) systems for solar hydrogen production. These systems consist of suspended or immobilized hydrogen evolution photocatalysts (HEPs) and oxygen evolution photocatalysts (OEPs).
Chen Gu +3 more
wiley +1 more source
A Modular AC-DC Power Converter with Zero Voltage Transition for Electric Vehicles
Energies, 2017 A study of the fundamental of operation of a three-phase AC-DC power converter that uses Zero-Voltage Transition (ZVT) together with Space Vector Pulse Width Modulation (SVPWM) is presented. The converter is basically an active rectifier divided into two
Jazmin Ramirez-Hernandez +2 more
doaj +1 more source
Harmonic Currents of Semiconductor Pulse Switching Converters
Energy and Power Engineering, 2013 Due to the operation of power semiconductor switching converters, the content of harmonic currents, which these switching converters take from the feed array, is still increasing. One of the possible ways of minimizing these currents is the use of pulse switching converters. On one hand, the original, characteristic harmonic ones are minimized, but, on
Petr Bilik +3 more
openaire +1 more source
Vibration Alert Bracelet for Notification of the Visually and Hearing Impaired [PDF]
, 2019 This paper presents the prototype of an electronic vibration bracelet designed to help the visually and hearing impaired to receive and send emergency alerts. The bracelet has two basic functions.
Ababei, Cristinel +7 more
core +1 more source
Coherent transfer of light polarization to electron spins in a semiconductor [PDF]
, 2007 We demonstrate that the superposition of light polarization states is coherently transferred to electron spins in a semiconductor quantum well. By using time-resolved Kerr rotation we observe the initial phase of Larmor precession of electron spins whose
Arai, Koichiro +7 more
core +3 more sources
Bimetallic Nanoparticles as Cocatalysts for Photocatalytic Hydrogen Production
Advanced Functional Materials, EarlyView.Recent developments have introduced bimetallic nanoparticles as effective cocatalysts for photocatalytic systems. This review explores the rapidly expanding research on bimetallic cocatalysts for photocatalytic production of hydrogen, emphasizing the creation of carrier‐selective contacts, localized surface plasmon resonance effects, methodologies for ...
Yufen Chen +4 more
wiley +1 more source
Simulation and Implementation a Non-Isolated Buck Converter at ZCS Condition [PDF]
Journal of Intelligent Procedures in Electrical Technology, 2013 A new soft-switching resonant inverting-buck converter with high efficiency is presented. The proposed converter steps down and inverts the input voltage.
Nahid Hematian, Masoud Jabari
doaj
A Soft Switching Half-Bridge Doubler Boost Converter Operating with Unity Power Factor
Eletrônica de Potência, 2005 This paper proposes a half-bridge doubler boost converter associated with an active commutation cell in order to minimize commutation losses. The converter operates with unity power factor and is able to provide high output voltages.
Roberto Mendes Finzi Neto +3 more
doaj +1 more source
A holistic DC link architecture design method for multiphase Integrated Modular Motor Drives [PDF]
, 2019 This article describes a holistic DC link architecture design method that considers the end-application of the drive and its corresponding constraints e.g. the maximum battery ripple current for a battery-supplied inverter.
De Belie, Frederik +4 more
core +2 more sources
Advanced Functional Materials, EarlyView.The NNR‐n series of oligomeric nanographenes delivers exceptional emission performance. This work shows that this performance is originated by their ladder‐type structure, which effectively deactivates low‐frequency vibronic modes. This deactivation neglects the main pathway for non‐emissive deactivation, even in the near‐infrared region. The potential
Marcos Díaz‐Fernández +12 more
wiley +1 more source