Results 71 to 80 of about 128,049 (243)

Performance comparison of passive series R and shunt R-C damped LCL filter for grid-connected inverters

The Journal of Engineering, 2019
LCL filters are widely used in distributed power-generation systems to attenuate high-frequency harmonics caused by pulse-width modulation switching of grid-connected inverters. A resonance occurs due to the series-connected reactive components. In order
Hakan Temiz, Erhan Demirok, Ozan Keysan, Ali Türkay, Burak Çetinkaya   +4 more
doaj   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Designing Asymmetric Memristive Behavior in Proton Mixed Conductors for Neuromorphic Applications

Advanced Functional Materials, EarlyView.
Protonic devices that couple ionic and electronic transport are demonstrated as bioinspired neuromorphic elements. The devices exhibit rubber‐like asymmetric memristive behavior with slow voltage‐driven conductance increase and rapid relaxation, enabling simplified read–write operation.
Nada H. A. Besisa, Masaki Tsuji, Yoshihiro Furue, Yifan Geng, Satya P. Pati, Satoshi Hamasuna, Takeaki Yajima   +6 more
wiley   +1 more source

Virtual radioactive source system for exercises modeling high doses

Nukleonika
This article presents the possibilities of working in a virtual high-dose rate field following a procedure developed at the Nuclear Security Department of the Centre for Energy Research (EK NSD) in Budapest. Real-life simulation of a radiation survey and
Bodor Károly, Csalótzky Zsolt, Pető János, Völgyesi Péter, Gulyás Attila, Kaposy Nándor, Zagyvai Péter   +6 more
doaj   +1 more source

An ultra-fast MMC-HVDC fault location algorithm based on transient voltage features and regression neural network

International Journal of Electrical Power & Energy Systems
An ultra-fast fault location algorithm based on the single-ended transient voltage features and regression neural network (RNN) is proposed, which utilizes 2.5 ms postfualt data window and is suitable for modular multilevel converter-based high-voltage ...
Yunqi Zhang, Yue Yu, Guosheng Yang
doaj   +1 more source

Selective Separation of the Rare Earth Elements Dysprosium and Neodymium via Tailoring Nanocellulose Chemical Structure

Advanced Functional Materials, EarlyView.
Dicarboxylate‐modified anionic hairy cellulose nanocrystals exhibit a high selectivity for dysprosium(III) over neodymium(III). This selectivity arises from disordered dicarboxylate cellulose “hairs” that enable cooperative ionic coordination, hydrogen bonding, and strain‐induced conformational shrinkage.
Roya Koshani, Shang‐Lin Yeh, Karuna Anna Sajeevan, Mica L. Pitcher, Dawson Alexander, Ratul Chowdhury, Amir Sheikhi   +6 more
wiley   +1 more source

Generalizable image segmentation for microstructure characterization through integrated SEM and EBSD analysis

npj Computational Materials
We demonstrate generalizable semantic segmentation using minimal ground truth data. Correlated scanning electron microscopy (SEM) images and electron backscatter diffraction (EBSD) measurements of friction-stir processed 316L stainless steel plates were ...
M. F. N. Taufique, Julia Nguyen, Julian D. Escobar, Mayur Pole, David Garcia, Tianhao Wang, Hrishikesh Das, Kathy Nwe, David Brown, Kenneth Ross, Donald R. Todd, Erin Barker, Eric Smith, Keerti S. Kappagantula, Jenna A. Bilbrey   +14 more
doaj   +1 more source

Dense Nanofibrillar Collagen–Silica Hybrids with High Strength and ECM‐Mimetic Tissue Integration

Advanced Functional Materials, EarlyView.
Dense nanofibrillar collagen–silica hybrids are engineered by synchronizing collagen fibrillogenesis with silica condensation, producing printable scaffolds that unexpectedly approach native extracellular matrix organization and strength. These cell‐free constructs guide endogenous cell‐infiltration, enable localized matrix remodeling, and integrate ...
Norein Norein, Shima Tavakoli, Philipp Wolf, Xie Ling, Veronica Rondahl, Klaus Leifer, Gry Hulsart‐Billström, Jöns Hilborn   +7 more
wiley   +1 more source

Research Progress on Power Visual Detection of Overhead Line Bolt Defects Based on UAV Images

Drones
In natural environments, the connecting bolts of overhead lines and power towers are prone to loosening and missing, posing potential risks to the safe and stable operation of the power system.
Xinlan Deng, Min He, Jingwen Zheng, Liang Qin, Kaipei Liu   +4 more
doaj   +1 more source

Monitoring the Implementation of State Regulation of National Economic Security [PDF]

Problemi Ekonomiki, 2018
The aim of the article is to improve the methodological tools for monitoring the implementation of state regulation of national economic security. The approaches to defining the essence of the concept of “national economic security” are generalized ...
Hubarieva Iryna O.
doaj