Results 101 to 110 of about 31,464 (325)

Parameter Identification Method for Transformer Winding Equivalent Networks Based on Frequency Response Analysis: A Comparative Study

Energies
Transformers are essential power transformation equipment in power systems. Winding deformation is one of the main forms of transformer winding faults, which may cause performance degradation or even overall damage to the equipment.
Ran Zhu, Fuqiang Ren, Zhaoyang Kang, Yonghao Zhang, Shujun Liu, Kaining Hou, Hongbin Wu, Jiawen Wang, Hongshun Liu, Qingquan Li   +9 more
doaj   +1 more source

Farey sequence in the appearance of subharmonic Shapiro steps

, 2015
Largest Lyapunov exponent has been examined in the dynamical-mode locking phenomena of the ac+dc driven dissipative Frenkel-Kontorova model with deformable substrate potential.
Mali, Petar, Odavic, Jovan, Tekic, Jasmina   +2 more
core   +1 more source

The String Theory on AdS_3 as a Marginal Deformation of a Linear Dilaton Background [PDF]

, 2005
We investigate N-point string scattering amplitudes in AdS_3 space. Based on recent observations on the solutions of KZ and BPZ-type differential equations, we discuss how to describe the string theory in AdS_3 as a marginal deformation of a (flat ...
Ahn, Baseilhac, Becker, Becker, de Boer, Dotsenko, Dotsenko, Dotsenko, Evans, Fredenhagen, Fukuda, Gaston Giribet, Giribet, Giribet, Giribet, Giribet, Giribet, Giveon, Giveon, Giveon, Hikida, Hikida, Hori, Hosomichi, Hosomichi, Ishibashi, Karczmarek, Kazakov, Kutasov, Maldacena, Maldacena, Maldacena, Nakayama, Nitti, Petropoulos, Ribault, Ribault, Satoh, Satoh, Schomerus, Stoyanovsky, Strominger, Takayanagi, Takayanagi, Takayanagi, Teschner, Teschner, Teschner   +47 more
core   +2 more sources

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

Analysis and improvement of grounding transformer's ability to resist outlet short-circuit

电力工程技术
Currently, there are issues such as insufficient research on the physical characteristics of windings in grounding transformers under outlet short circuit conditions and a high number of damage accidents.
LI Jiayang, XIAN Richang, LI Fei, HU Yuyao, XUE Yongduan, WANG Wei   +5 more
doaj   +1 more source

Asymmetric Orbifolds, Non-Geometric Fluxes and Non-Commutativity in Closed String Theory

, 2012
In this paper we consider a class of exactly solvable closed string flux backgrounds that exhibit non-commutativity in the closed string coordinates.
A Dabholkar, A Dabholkar, A Flournoy, A Flournoy, A Giveon, A Giveon, B Wecht, C Angelantonj, C Hull, C Hull, C Hull, C Hull, C Kounnas, C Kounnas, C-S Chu, Cezar Condeescu, D Andriot, D Lüst, Dieter Lüst, E Kiritsis, E Kiritsis, F Ardalan, F Ardalan, GW Gibbons, I Antoniadis, I Antoniadis, I Antoniadis, I Antoniadis, Ioannis Florakis, J Russo, J Russo, J Russo, J Scherk, J Scherk, J Shelton, K Aoki, K Narain, K Narain, M Melvin, M Roček, M Serone, N Hitchin, N Seiberg, NJ Hitchin, R Blumenhagen, R Blumenhagen, R Blumenhagen, S Ferrara, S Ferrara, T Buscher, V Schomerus   +50 more
core   +1 more source

NFDI MatWerk Ontology (MWO): A BFO‐Compliant Ontology for Research Data Management in Materials Science and Engineering

Advanced Engineering Materials, EarlyView.
This article presents the NFDI‐MatWerk Ontology (MWO), a Basic Formal Ontology‐based framework for interoperable research data management in materials science and engineering (MSE). Covering consortium structures, research data management resources, services, and instruments, MWO enables semantic integration, Findable, Accessible, Interoperable, and ...
Hossein Beygi Nasrabadi, Ebrahim Norouzi, Kostiantyn Hubaiev, Jörg Waitelonis, Harald Sack   +4 more
wiley   +1 more source

Dynamic behavior analysis of copper wire for predicting defects in the winding process of a motor coil

Nihon Kikai Gakkai ronbunshu
In recent years, efforts to promote energy conservation have become more active, and there is an increasing demand for high-efficiency motor coils. The efficiency of permanent magnet motors is closely related to manufacturing engineering.
Masato NAGANO, Taichi HIROSAWA, Hidefumi WAKAMATSU, Yoshiharu IWATA, Hironori SUZUKI, Takumi NAKAUE, Takahiro TANAKA   +6 more
doaj   +1 more source

Frequencies Dominations for Different Rating of Distribution Transformer under Transients [PDF]

, 2020
Power transients faults on high voltage lines are prominently due to high frequency transients. These transients affect the predicted life and efficiency of equipment.
Faisal, Haseeb, Hussain, Najeeb, Imdad, Dr Kashif, Sharif, Faisal   +3 more
core  

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source