نتایج جستجو برای: current limiting reactor

تعداد نتایج: 877316  

Journal: :NHM 2013
Henri Berestycki Guillemette Chapuisat

This paper deals with the existence of traveling fronts for the reaction-diffusion equation: ∂u ∂t −∆u = h(u, y) t ∈ R, x = (x1, y) ∈ R . We first consider the case h(u, y) = f(u) − αg(y)u where f is of KPP or bistable type and lim|y|→+∞ g(y) = +∞. This equation comes from a model in population dynamics in which there is spatial spreading as well as genetic mutation of a quantitative genetic tr...

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Journal: :JCM 2014
Lei Chen Hao Pan Changhong Deng Feng Zheng Haijun Yan Fang Guo

Since the interactivity, integrality and instantaneity of information communication in smart substation have been improved to higher levels, it can contribute to promote the realization of a centralized type substation area backup protection (SABP), acting as an integrated protection system for whole substation. On the side, in the case that fault current limiters (FCLs) are suggested to be emp...

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2002
U. Balachandran Y. S. Cha S. E. Dorris J. T. Dusek J. E. Emerson R. A. Erck B. L. Fisher K. C. Goretta K. E. Gray J. R. Hull Y. Jee R. E. Koritala M. Li J. W. Lucas B. Ma V. A. Maroni R. L. McDaniel D. J. Miller J.-H. Park J. J. Picciolo J. P. Singh

Most large-scale applications of high-critical-temperature superconductors will require wires or tapes that can carry large current in applied magnetic fields. This report describes research and development efforts at Argonne National Laboratory (ANL) aimed at producing practical superconducting components and devices using the Y-Ba-Cu-O and Bi-(Pb)-Sr-Ca-Cu-O systems. Topics discussed include ...

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2014
ANDREW J. CHRISTLIEB YUAN LIU ZHENGFU XU

In this paper, we utilize the maximum-principle-preserving flux limiting technique, originally designed for high order weighted essentially non-oscillatory (WENO) methods for scalar hyperbolic conservation laws, to develop a class of high order positivity-preserving finite difference WENO methods for the ideal magnetohydrodynamic (MHD) equations. Our schemes, under the constrained transport (CT...

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2012
Jonathan M. Borwein Liangjin Yao

In this paper, we study the properties of integral functionals induced on LE(S, μ) by closed convex functions on a Euclidean space E. We give sufficient conditions for such integral functions to be strongly rotund (well-posed). We show that in this generality functions such as the Boltzmann-Shannon entropy and the Fermi-Dirac entropy are strongly rotund. We also study convergence in measure and...

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2008
N. Sreenivasan M. Xia

Limiting dome height (LDH) tests were used to evaluate the formability of laser butt welded blanks of the dual phase 980 steel in comparison with the base metal. Two different lasers were used: diode and Nd:YAG, giving a wide range of welding thermal cycles. A sharp decrease in LDH was observed in the welded specimens due to the formation of a softened zone in the outer heat affected zone. Soft...

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2003
Roberto P. Mignani

About 100 millisecond (ms) pulsars have been identified in the Galaxy, and only ≈ 10% of them are solitary, i.e. without a binary companion. Nothing is known on the optical emission properties of millisecond pulsars. Observations of solitary millisecond pulsars are the only way to detect their faint optical radiation, otherwise buried by the brighter white dwarf companion. As in the case of sol...

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2003
C. W. Krueger C. A. Wang

A detailed computer model which predicts etch rates and spatial uniformity for chemical vapor etching of GaAs with CH3I in a vertical rotating-disk organometallic vapor phase epitaxy (OMVPE) reactor has been developed. Etch rate predictions compare favorably with experiments performed in the vertical reactor at several temperatures ranging from 525 to 590°C and CH3I mole fractions from 0.005 to...

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2017
Abdullah Alotaibi Sophie Hodgkiss Elena F. Kozhevnikova Ivan V. Kozhevnikov

The alkylation of benzene by propane to yield isopropylbenzene (iPrPh) was studied using bifunctional Pd-acid catalysts, such as Pd-heteropoly acid and Pd-zeolite, in a fixed bed reactor at 300 ◦C and 1 bar pressure. Keggin-type tungstosilicic acid H4SiW12O40 (HSiW) and zeolite HZSM-5 were used as the acid components in these catalysts. The reaction occurred most efficiently over 2%Pd/25%HSiW/S...

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Journal: :IEEE Journal of Emerging and Selected Topics in Power Electronics 2022

The rapid uptake of renewable energy sources is causing synchronous generators (SGs) to be replaced by power electronic inverters, meaning that these inverters need offer the characteristics traditionally associated with SG. As a result, it has been proposed should controlled in grid-forming mode order support voltage microgrids. Given are as source, temporary events, such short circuits or ove...

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