Results 71 to 80 of about 5,734,949 (292)

Influence of ac ageing on space charge dynamics in LDPE

, 2003
Polymeric materials have been widely used as insulation in power industry due to their excellent electrical properties. However, these properties deteriorate in time irreversibly when the material is subjected to electric stress. Although space charge is
Fu, M, Liu, X Z, Chen, G
core   +1 more source

Ontology‐Aligned Structuring and Reuse of Multimodal Materials Data and Workflows Toward Automatic Reproduction

Advanced Engineering Materials, EarlyView.
Reproduction of stacking fault energy calculations from literature with a semi‐automated large language model‐assisted extraction procedure: extraction of simulation protocol, atomistic structures, computational parameters, and reported results, ontology alignment, knowledge graph construction and, finally, recomputation forvalidation.
Sepideh Baghaee Ravari, Abril Azocar Guzman, Sarath Menon, Stefan Sandfeld, Tilmann Hickel, Markus Stricker   +5 more
wiley   +1 more source

Space charge characteristics and dielectric properties of PANI/PP‐g‐MAH/PP ternary composite

High Voltage
Space charge accumulation in polypropylene materials for direct current capacitor will accelerate the ageing of the materials, resulting in the degradation of their insulation properties.
Guochang Li, Tianzhen Liu, Zhenlu Gu, Xiaolong Chen, Beibei Sun, Yuanwei Zhu, Shengtao Li, Yanhui Wei   +7 more
doaj   +1 more source

Quantifying Electric Charge on Cap-Pin Glass Insulator: Investigating the Impact of Pollution through Simulation and Experimental Approaches

ENP Engineering Science Journal
The objective of this paper is to investigate the behavior of electric charges on cap-pin glass insulator under 50 Hz AC voltage. The study is conducted using COMSOL Multiphysics to understand the charge location, polarity, and parameters affecting their
Rabie Salhi, Abdelouahab Mekhaldi, Madjid Teguar, Omar Kherif   +3 more
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Space charge determination in HVDC power cable and its influence on electric field

, 2010
Considerable amount of transmission and distribution of electricity is carried out by power cable. At present, most high voltage direct current (HVDC) installation uses traditional (oil-impregnated paper insulation and oil-filled-types) cables which pose
Choo, Chin Tze
core   +1 more source

Space Charge Accumulation and Decay in Dielectric Materials with Dual Discrete Traps

Applied Sciences, 2019
Charge trapping and de-trapping properties can affect space charge accumulation and electric field distortion behavior in polymers. Dielectric materials may contain different types of traps with different energy distributions, and it is of interest to ...
Zhaoliang Xing, Chong Zhang, Haozhe Cui, Yali Hai, Qingzhou Wu, Daomin Min   +5 more
doaj   +1 more source

Space charge behaviour in oil and impregnated pressboard combined insulation system [PDF]

, 2014
Dielectric performance of oil-pressboard insulation system used in high voltage direct current (HVDC) convertor transformers can be affected by the presence of space charge.
Hao, Miao, Gordon Wilson, Yuan Zhou, George Chen, Wilson, Gordon, Miao Hao, Paul Jarman, Zhou, Yuan, Jarman, Paul, Chen, George   +9 more
core   +1 more source

A Practical Noise2Noise Denoising Pipeline for High‐Throughput Raman Spectroscopy

Advanced Engineering Materials, EarlyView.
A lightweight and reproducible denoising pipeline for high‐throughput Raman spectroscopy is introduced, based on a 1D convolutional autoencoder trained with a Noise2Noise strategy. Using only repeated short‐exposure acquisitions, the method suppresses stochastic noise without reference spectra, enabling reliable spectral reconstruction while preserving
David Martin‐Calle, Cesar Alvarez‐Llamas, Vincent Motto‐Ros, Christophe Dujardin, Jérémie Margueritat, David Rodney   +5 more
wiley   +1 more source

Dynamics of space charge and electroluminescence modelling in polyethylene

, 2012
Space charge has been recognized as an important factor contributing to the electrical failure of the cable insulation. Extensive efforts have been made to investigate space charge dynamics within polymeric insulations under electric stresses.
Zhao, Junwei
core   +1 more source