Results 31 to 40 of about 909,126 (300)

Simulation on Operating Overvoltage of Dropping Pantograph Based on Pantograph–Catenary Arc and Variable Capacitance Model

Applied Sciences
When the electric locomotive pantograph is dropping, the interruption of pantograph catenary contact causes electromagnetic oscillation and arcing. The frequent arc burning that occurs due to charge accumulation results in the amplitude of overvoltage ...
Dazuo Jiang, Huanqing Zou, Yike Guo, Fuqiang Tian, Hongqi Liu, Yufeng Yin   +5 more
doaj   +1 more source

Parameter identification of dc black-box arc model using non-linear least squares

The Journal of Engineering, 2019
The black-box arc model is known to be a useful technique to simulate dynamic arc-circuit interaction by reflecting arc characteristics. Existing researches have shown that the black-box model has been widely used to analyse the ac arc characteristics of
Kyu-Hoon Park, Ho-Yun Lee, Mansoor Asif, Bang-Wook Lee   +3 more
doaj   +1 more source

Simulation and Verification of Effect of Arc Duration on Arc Temperature Based on COMSOL

Machines, 2023
The pantograph–catenary arc of urban rail has the characteristic of high temperature, which directly acts on the surface of the pantograph–catenary system, will seriously ablate pantograph and contact line, and affect the flow of the pantograph–catenary ...
Xiaoying Yu, Mengjie Song, Ze Wang
doaj   +1 more source

Arc Statistics in Cosmological Models with Dark Energy

, 2003
We investigate how the probability of the formation of giant arcs in galaxy clusters is expected to change in cosmological models dominated by dark energy with an equation of state p=w rho c^2 compared to cosmological-constant or open models.
Abroe, Bardeen, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bartelmann, Bullock, C. Baccigalupi, Carroll, Chiba, Cooray, Douspis, Efstathiou, Eke, F. Perrotta, Falco, Flores, Flores, Gioia, Golse, Halverson, Helbig, Kassiola, Kaufmann, Keeton, Kochanek, Kochanek, L. Moscardini, Lacey, Lacey, Le Fèvre, Lee, Luppino, M. Bartelmann, M. Meneghetti, Mainini, Meneghetti, Meneghetti, Meneghetti, Navarro, Navarro, Netterfield, Oguri, Oguri, Peebles, Perlmutter, Press, Quast, Reiprich, Richstone, Riess, Sheth, Wang, Wang, Wu, Zaritsky   +57 more
core   +3 more sources

Application of an Improved Mayr-Type Arc Model in Pyro-Breakers Utilized in Superconducting Fusion Facilities

Energies, 2021
Pyro-breaker, a fast-responding, highly reliable and explosive-driven circuit breaker, is utilized in several Quench Protection Systems (QPS). The commutation process and its parameters are the main technical considerations in the process of designing a ...
Jun He, Ke Wang, Jiangang Li
doaj   +1 more source

Analysis and Modeling of Physical Evolution Mechanism for High-Resistance to Low-Resistance Grounding Faults in 10 kV Cable Joints

Energies
Currently, the lack of analysis and applicable circuit models for the evolution of cable joint faults is responsible for explosions or fire accidents in the distribution network system.
Yifeng Zhao, Yanqi Zeng, Ran Hu, Luliang Zhang, Gang Liu, Yihua Qian, Zhi Li   +6 more
doaj   +1 more source

Germline TP53 Mutations Causing Diamond–Blackfan Anemia: A French Report

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Diamond–Blackfan anemia is a rare congenital erythroblastopenia typically caused by mutations in ribosomal protein genes. Recently, gain‐of‐function mutations in TP53 have been identified as a novel cause of Diamond–Blackfan anemia. We report two French patients who both harbored a heterozygous TP53 deletion (NM_000546.5: c.1077delA; p ...
Rafael Moisan, Lydie Da Costa, Ludivine David Nguyen, Heloise Chosseler, Audrey Riquet, Benedicte Bruno, Melissa Barbati   +6 more
wiley   +1 more source

Electrical Characterization of Pantograph and Catenary Offline Under Train Operating Conditions Based on Improved Habedank Model and AT Power Supply Network

IEEE Access
Presently, with the increase in the operating speed of a train, the off-line phenomenon of its pantograph and the contact wire occurs intermittently, which affects the quality of its receiving current.
Like Pan, Hongchi Wang, Zhiqiang Yu, Tong Xing, Caizhi Yang, Yuan Yuan, Xiaohan Zhu, Jianxiang Sun, Xiaoyun Sun, Yuehua Cui, Tao Feng, Xudong Yi, Jianhua Chen, Wenxia Yan   +13 more
doaj   +1 more source

S wave velocity structure below central Mexico using high-resolution surface wave tomography [PDF]

, 2010
Shear wave velocity of the crust below central Mexico is estimated using surface wave dispersion measurements from regional earthquakes recorded on a dense, 500 km long linear seismic network.
Clayton, R. W., García, D., Iglesias, A., Pacheco, J. F., Pérez‐Campos, X., Singh, S. K., Valdés‐González, C.   +6 more
core   +1 more source

Magnetic suppression of arc blowout in a model arc furnace [PDF]

IEEE Transactions on Plasma Science, 1992
The two most likely causes of electromagnetic instability in electric furnace arcs are shown to be the kink and the fire-hose instabilities. Stabilization by an externally imposed axially magnetic field is analyzed, and experimental results are presented demonstrating stabilization of a small, pulsed test arc by this method. >
Bellan, Paul M., Higley, Jay W.
openaire   +2 more sources