Results 61 to 70 of about 30,646 (281)

Calculation of the electrodynamic forces causing deformation of the power transformer’s windings [PDF]

E3S Web of Conferences, 2019
This paper describes modified method to calculate electrodynamic forces causing deformation of the power transformer’s windings. This method takes into account the deformed shape of the winding. The new equations allow to get better accuracy.
Khrennikov A Yu, Aleksandrov N.M.
doaj   +1 more source

Post-traumatic wind swept deformity: five volar carpometacarpal dislocations

BMJ Case Reports, 2019
Carpometacarpal (CMC) joint dislocation other than thumb are rare injuries and can be easily missed. These injuries account for <1% of all hand injuries and are frequently overlooked or missed. CMC dislocations can occur either in dorsal or volar direction and be associated with fractures.
Prajwal P Mane, Anil K Bhat, Ashwath Acharya   +2 more
openaire   +3 more sources

SFRA, Detect of Winding Deformation in Power Transformer

International Journal of Innovative Technology and Exploring Engineering, 2020
The sweep frequency response analysis is extensively used technique for detect hidden fault and condition monitoring of power transformer. The operation is administered by supply a coffee voltage signal of varying frequencies to the transformer windings and measuring both the input and output signals.
Dr. B. Gopinath*, Mr. C. Shankar*, C. Jaya Meenakshi*, P. Meena*, K. Sudha*   +4 more
openaire   +1 more source

Lessons Learned: Quality Analysis of Optical Coherence Tomography in Neuromyelitis Optica

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Optical coherence tomography (OCT)‐derived retina measurements are markers for neuroaxonal visual pathway status. High‐quality OCT scans are essential for reliable measurements, but their acquisition is particularly challenging in eyes with severe visual impairment, as often observed in neuromyelitis optica spectrum disorders ...
Hadi Salih, Sara Samadzadeh, Charlotte Bereuter, Seyedamirhosein Motamedi, Claudia Chien, Pablo Villoslada, Hadas Stiebel‐Kalish, Nasrin Asgari, Yang Mao‐Draayer, Marius Ringelstein, Joachim Havla, Marco Aurélio Lana Peixoto, Ho Jin Kim, Jacqueline Palace, Maria Isabel Leite, Srilakshmi M. Sharma, Fereshteh Ashtari, Rahele Kafieh, Lekha Pandit, Orhan Aktas, Philipp Albrecht, Letizia Leocani, Itay Lotan, Sasitorn Siritho, Jérôme de Seze, Romain Marignier, Caroline Froment Tilikete, Denis Bernardi Bichuetti, Ivan Maynart Tavares, Ayse Altintas, Anu Jacob, Saif Huda, Ibis Soto de Castillo, Lawrence J. Cook, Michael R. Yeaman, Axel Petzold, Alexander U. Brandt, Friedemann Paul, Frederike C. Oertel, Hanna G. Zimmermann, with the Guthy Jackson Charitable Foundation—International Clinical Consortium and CROCTINO Collaborators   +40 more
wiley   +1 more source

Fault diagnosis of transformer winding short circuit based on WKPCA-WM and IPOA-CNN

Frontiers in Energy Research, 2023
When the winding of the power transformer is short-circuited, the winding will experience constant vibration, which will cause axial instability of the winding, and then lead to winding looseness, deformation, bulge, etc., therefore, a diagnosis method ...
Xiping Pei, Songtao Han, Yanyan Bao, Wei Chen, Hengjie Li   +4 more
doaj   +1 more source

Phase transitions in center-stabilized lattice gauge theories [PDF]

, 2011
We simulate four-dimensional center-stabilized lattice Yang-Mills theories on R^3 x S^1 with a newly developed pseudo-heatbath algorithm. We analyze the phase structure of such theories, namely the bulk transition and the spontaneous breaking of the ...
Vairinhos, Helvio
core  

Network Localization of Fatigue in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Fatigue is among the most common symptoms and one of the main factors determining the quality of life in multiple sclerosis (MS). However, the neurobiological mechanisms underlying fatigue are not fully understood. Here we studied lesion locations and their connections in individuals with MS, aiming to identify brain networks ...
Olli Likitalo, Jaakko Kungshamn, Albert Bellmunt‐Gil, Silvia Tommasin, Abhineet Ojha, Matias Viitala, Juho Aaltonen, Jyrki Lötjönen, Juha Koikkalainen, Pauli Ylikotila, Patrizia Pantano, Merja Soilu‐Hänninen, Juho Joutsa   +12 more
wiley   +1 more source

Research on Deformation Fault Diagnosis of Transformer Windings Based on a Highly Sensitive Multimodal Feature System

Energies
The current mainstream methods for online detection of transformers all have shortcomings such as low sensitivity and susceptibility to interference from the testing environment.
Guochao Qian, Xiao Li, Dexu Zou, Haoruo Sun, Weiju Dai, Shan Wang, Chunxiao He, Zetong Wang, Yuhan Zou, Junhao Ma, Shoulong Dong   +10 more
doaj   +1 more source

Improved Winding Mechanical Fault Type Classification Methods Based on Polar Plots and Multiple Support Vector Machines

IEEE Access, 2020
The accurate and fast diagnosis of transformer winding deformation faults is of significance to power suppliers and utilities. An improved winding mechanical deformation fault classification method is proposed.
Jiangnan Liu, Zhongyong Zhao, Kai Pang, Dong Wang, Chao Tang, Chenguo Yao   +5 more
doaj   +1 more source

Effect of Pole Number on Generator End Winding Electromagnetic Force and Mechanical Response before and after RISC

International Journal of Rotating Machinery, 2021
This paper comparatively studies on the end winding electromagnetic force and mechanical response for generators with different numbers of poles. The analytical expression of the end winding electromagnetic force is derived under the rotor winding ...
Hong-Chun Jiang, Yu-Ling He, Gui-Ji Tang
doaj   +1 more source