Results 21 to 30 of about 10,771 (260)

Hydrogen‐Related Defects in Insulators

physica status solidi (a), 2021
It is shown that the introduction of hydrogen by a dc H plasma treatment leads to the appearance of negatively charged defects in amorphous Al2O3 and SiO2 and positively charged defects in amorphous HfO2. The concentration of the defects increases with increasing temperature of the dc H plasma treatment between 50 and 100 °C, and the defects appear in ...
openaire   +1 more source

Research on fault location and state evaluation method of diagnostic function for power cable insulation defects based on the impedance spectrum

Diance yu yibiao
In the detection of power cable insulation defects, the accurate location and degree evaluation of insulation defects are crucial to the planned overhaul work of power cable.
SI Jie, CHEN Zhi, ZHAO Jian, ZHOU Yuxiao
doaj   +1 more source

A Intelligent Method for Insulation Defect Detection of Switchgear Based on Multi-source Sensing

Zhongguo dianli, 2021
Insulation fault accounts for a large proportion in electrical equipment faults, so it is an important strategy to detect and eliminate the faults in their latent phase. Insulation defects are usually accompanied by temperature rise or partial discharge,
Pei CAO, Peng XU, Jianming HE, Kai GAO, Haoyang TIAN, Yiping JI   +5 more
doaj   +1 more source

Research on improved YOLOv8 algorithm for insulator defect detection

Journal of Real-Time Image Processing, 2023
Abstract With the rapid advancement of artificial intelligence technologies, drone aerial photography has gradually become the mainstream method for defect detection of transmission line insulators. To address the issues of slow recognition speed and low accuracy in existing detection methods, this paper proposes an insulator defect detection ...
Lin Zhang, Boqun Li, Yang Cui, Yushan Lai, Jing Gao   +4 more
openaire   +2 more sources

A cable insulation defect classification method based on CNN-transformer

Frontiers in Physics
Cable insulation defect detection ensures electrical safety, prevents accidents, extends equipment life and guarantees stable system operation. For the traditional cable insulation defect detection and identification of difficult problems, this paper ...
Ning Zhao, Zhiguo Duan, Qian Li, Kang Guo, Ziguang Zhang, Baoan Liu   +5 more
doaj   +1 more source

Electrical resistance of individual defects at a topological insulator surface [PDF]

Nature Communications, 2017
AbstractThree-dimensional topological insulators host surface states with linear dispersion, which manifest as a Dirac cone. Nanoscale transport measurements provide direct access to the transport properties of the Dirac cone in real space and allow the detailed investigation of charge carrier scattering.
Felix Lüpke, Markus Eschbach, Tristan Heider, Martin Lanius, Peter Schüffelgen, Daniel Rosenbach, Nils von den Driesch, Vasily Cherepanov, Gregor Mussler, Lukasz Plucinski, Detlev Grützmacher, Claus M. Schneider, Bert Voigtländer   +12 more
openaire   +6 more sources

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

IDENTIFICATION OF TECHNOLOGICAL DEFECTS IN HIGH-VOLTAGE SOLID INSULATION OF ELECTRICAL INSULATION STRUCTURES ON THE CHARACTERISTICS OF PARTIAL DISCHARGES

Electrical engineering & Electromechanics, 2019
Introduction. High-voltage insulation systems always have some background level of the partial discharges, which does not have any significant effect on the life of the electrical insulation design.
G. V. Bezprozvannych, A. G. Kyessayev, I. A. Mirchuk, A. V. Roginskiy   +3 more
doaj   +1 more source

Thermal Insulation Mechanism, Preparation, and Modification of Nanocellulose Aerogels: A Review

Molecules, 2023
Energy problems have become increasingly prominent. The use of thermal insulation materials is an effective measure to save energy. As an efficient energy-saving material, nanocellulose aerogels have broad application prospects.
Yueqi Wu, Xue Wang, Lihong Yao, Siyu Chang, Ximing Wang   +4 more
doaj   +1 more source

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

Advanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao, Sriram Subramanian, Gianluca Memoli   +2 more
wiley   +1 more source