Results 51 to 60 of about 22,042 (209)
Study on abnormal abrasion of metro pantograph
机车电传动, 2023 Pantograph-catenary system is the central system for the power supply of urban rail transit trains. Higher train speed and complex train operating environment can generate severe vibrations on the pantograph-catenary system, resulting in high-frequency ...
ZHANG Shiyu +4 more
doaj
Plasma interaction experiment 2 (PIX 2): Laboratory and flight results [PDF]
, 1985 The Plasma Interaction Experiments 1 and 2 (PIX 1 and 2) were designed as first steps toward understanding interactions between high-voltage solar arrays and the surrounding plasma.
Grier, N. T.
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Arc tracking control in insulation systems for aeronautic applications: challenges, opportunities, and research needs [PDF]
, 2020 Next generation aircrafts will use more electrical power to reduce weight, fuel consumption, system complexity and greenhouse gas emissions. However, new failure modes and challenges arise related to the required voltage increase and consequent rise of ...
Bogarra Rodríguez, Santiago +3 more
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Strong behavioral similarities in timed-arc Petri nets [PDF]
Applied Mathematics and Computation, 2018 The concept of process similarity has attracted the attention of many researchers in the recent literature, since it measures the degree of proximity of processes. Similarities are therefore useful for the efficient management of large repositories, since they allow us to find the appropriate process models among hundreds or thousands of possible ...
openaire +3 more sources
Development and Engineering Application of 550 kV Fast SF6 Circuit Breaker
IEEE AccessTo address the mitigation of excessive short-circuit currents in power grids and the arcing-resistant technology for large oil-filled equipment, this paper proposes a 550 kV fast SF6 circuit breaker solution, the equipment development and engineering ...
Zhi-Bing Li +8 more
doaj +1 more source
IEEE Access, 2020 The high performance of medium-voltage direct current (MVDC) power supply system is a pre-requisite for several industrial applications. To meet the higher voltage direct current (DC) breaking requirements in the fields of aviation, aerospace, and new ...
Bowen Jia +5 more
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Decidability of Properties of Timed-Arc Petri Nets [PDF]
, 2000 Timed-arc Petri nets (TAPN’s) are not Turing powerful, because, in particular, they cannot simulate a counter with zero testing. Thus, we could think that this model does not increase significantly the expressiveness of untimed Petri nets. But this is not true; in a previous paper we have shown that the differences between them are big enough to make ...
Frutos Escrig, David De +2 more
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Empirical comparison of high gradient achievement for different metals in DC and pulsed mode
, 2010 For the SwissFEL project, an advanced high gradient low emittance gun is under development. Reliable operation with an electric field, preferably above 125 MV/m at a 4 mm gap, in the presence of an UV laser beam, has to be achieved in a diode ...
Ashfold M. N. R. +24 more
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A time‐dependent model of polar cap arcs
Journal of Geophysical Research: Space Physics, 1993 A two‐dimensional time‐dependent model of polar cap arcs has been developed. The electrodynamics of the polar cap arcs are treated self‐consistently in the frame of the coupled magnetosphere‐ionosphere system. The focus of this paper is to introduce the physics and mathematical formulation of the model and describe the features of the spatial structure
Zhu, Lie +3 more
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The voltage threshold for arcing for solar cells in LEO: Flight and ground test results [PDF]
Ground and flight results of solar cell arcing in low Earth orbit (LEO) conditions are compared and interpreted. It is shown that an apparent voltage threshold for arcing may be produced by a strong power law dependence of arc rate on voltage, combined ...
Ferguson, D. C.
core +1 more source