Results 31 to 40 of about 22,042 (209)
Sensors, 2017 Contact erosion is one of the most crucial factors affecting the electrical service lifetime of high-voltage circuit breakers (HVCBs). On-line monitoring the contacts’ erosion degree is increasingly in demand for the sake of condition based maintenance ...
Zhixiang Wang +4 more
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Analysis of Arc Re-Ignition in Vacuum Interrupter-Based HVdc Circuit Breakers
IEEE AccessThe protection of HVdc systems has long been challenged by the absence of natural current zero-crossing, typically addressed using L-C branches. However, the phenomenon of multiple arc reignitions in vacuum interrupter (VI) based HVdc circuit breakers ...
Tamer Eliyan +3 more
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Characteristics of an x-ray preionized TEA CO laser [PDF]
, 1987 A cryogenically cooled sealed-off x-ray preionized self-sustained discharge CO laser was succesfully operated. It was found that 20 to 40% higher output energies could be obtained using x-ray instead of uv preionization.
Ernst, G.J., Zuidema, R.J.
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Numerical Methods for the Analysis of Power Transformer Tank Deformation and Rupture Due to Internal Arcing Faults. [PDF]
PLoS ONE, 2015 Power transformer rupture and fire resulting from an arcing fault inside the tank usually leads to significant security risks and serious economic loss. In order to reveal the essence of tank deformation or explosion, this paper presents a 3-D numerical ...
Chenguang Yan +4 more
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The time-dependent prize-collecting arc routing problem [PDF]
Computers & Operations Research, 2013 A new problem is introduced named the Time-Dependent Prize-Collecting Arc Routing Problem (TD-PARP). It is particularly relevant to situations where a transport manager has to choose between a number of full truck load pick-ups and deliveries on a road network where travel times change with the time of day.
Black, Daniel +2 more
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Properties of Distributed Timed-Arc Petri Nets
, 2001 In [12] we started a research on a distributed-timed extension of Petri nets where time parameters are associated with tokens and arcs carry constraints that qualify the age of tokens required for enabling. This formalism enables to model e.g. hardware architectures like GALS.
Nielsen, M., Sassone, V., Srba, J.
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Popular Ensemble Methods: An Empirical Study
, 2011 An ensemble consists of a set of individually trained classifiers (such as neural networks or decision trees) whose predictions are combined when classifying novel instances. Previous research has shown that an ensemble is often more accurate than any of
Maclin, R., Opitz, D.
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Quantifying crustal thickness over time in magmatic arcs [PDF]
Scientific Reports, 2015 AbstractWe present global and regional correlations between whole-rock values of Sr/Y and La/Yb and crustal thickness for intermediate rocks from modern subduction-related magmatic arcs formed around the Pacific. These correlations bolster earlier ideas that various geochemical parameters can be used to track changes of crustal thickness through time ...
Lucia Profeta +7 more
openaire +2 more sources
An investigation of arc discharging on negatively biased dielectric conductor samples in a plasma [PDF]
, 1985 Proposals are now being developed for the construction of high-power photovoltaic systems for operation in low Earth orbit, where the plasma number density is about 1,000 to 1,000,000 per cubic cm.
Miller, W. L.
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Numerical investigation of the double-arcing phenomenon in a cutting arc torch [PDF]
, 2014 A numerical investigation of the double-arcing phenomenon in a cutting arc torch is reported. The dynamics of the double-arcing were simulated by using a two-dimensional model of the gas breakdown development in the space-charge layer contiguous to the ...
Kelly, Hector Juan +3 more
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