Results 81 to 90 of about 8,775,291 (284)

A novel protection scheme of wind farm access to flexible DC power grid based on high frequency measurement inductance difference

open access: yesInternational Journal of Electrical Power & Energy Systems
A protection scheme for the DC transmission line of the four-terminal flexible DC grid connected to the doubly-fed wind farm based on the high-frequency measurement inductance difference is proposed.
Jing Ma   +4 more
doaj   +1 more source

Covalent Functionalization of 2D Semiconductors: A Roadmap to Advanced Electronic Devices

open access: yesAdvanced Functional Materials, EarlyView.
This Review presents recent advances in the covalent functionalization strategies for two‐dimensional semiconductors and their implementation in modern technologies. Layered materials are modified through diverse molecular chemistries (e.g., thiols, diazonium salts, alkyl halides, and electron‐deficient species) to tailor their surface properties ...
Ramiro Quirós‐Ovies   +2 more
wiley   +1 more source

Hybrid renewable power systems for mobile telephony base stations in developing countries

open access: yes, 2013
Published ArticleThis paper investigates the possibility of using hybrid Photovoltaic–Wind renewable systems as primary sources of energy to supply mobile telephone Base Transceiver Stations in the rural regions of the Democratic Republic of Congo.
Vermaak, Herman Jacobus   +1 more
core  

Optimizing NiMo Electrocatalyst Coatings for Hydrogen Evolution in Alkaline Electrolysis With The Machine Learning‐Guided Autonomous Platform CatBot

open access: yesAdvanced Functional Materials, EarlyView.
This work presents a closed‐loop optimization workflow integrating CatBot, an automated synthesis and testing system, to discover NiMo hydrogen‐evolution catalysts. CatBot synthesised and evaluated 228 unique samples, identifying the best performing catalysts for transfer to nickel‐foam electrodes. The best candidate is highly active, reaching 1 Acm−2${
Paolo Vincenzo Freiesleben de Blasio   +7 more
wiley   +1 more source

Forward‐Biased Perovskite Photodiodes for In‐Sensor Optical Change Sensing

open access: yesAdvanced Functional Materials, EarlyView.
A forward‐biased perovskite photodiode is introduced as an in‐sensor analog preprocessing unit that uses current balancing between photocurrent and injection current to generate optical changes relative to programmable optical reference levels. The device directly converts reference‐relative optical changes into bipolar current signals, enabling sensor‐
Eungseon Yeon   +14 more
wiley   +1 more source

Charge‐Polarized Ni─S4 Single‐Atom Sites Drive Selective Photoreforming of Poly(lactic acid) to Lactate and Hydrogen

open access: yesAdvanced Functional Materials, EarlyView.
Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao   +8 more
wiley   +1 more source

Energy from Waste: Reuse of Compost Heat as a Source of Renewable Energy [PDF]

open access: yes, 2010
An in-vessel tunnel composting facility in Scotland was used to investigate the potential for collection and reuse of compost heat as a source of renewable energy.
E. R. Lamont   +5 more
core   +1 more source

Single-Phase high impedance ground fault location method based on transient directional characteristics

open access: yesInternational Journal of Electrical Power & Energy Systems
After the single-phase high impedance fault (HIF) occurs in distribution networks, it is difficult to select the faulted feeder and locate the fault section due to the weak fault current and susceptibility to noise interference.
Ao Li   +4 more
doaj   +1 more source

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