Results 11 to 20 of about 1,104,045 (310)

Transient analysis of power loss density with time-harmonic electromagnetic waves in Debye media [PDF]

open access: yesRoyal Society Open Science, 2021
Due to the complex permittivity, it is difficult to directly clarify the transient mechanism between electromagnetic waves and Debye media. To overcome the above problem, the temporal relationship between the electromagnetic waves and permittivity is ...
Jiaqi Zhong   +3 more
doaj   +2 more sources

Transient analysis of the Erlang A model. [PDF]

open access: yesMath Methods Oper Res (Heidelb), 2015
We consider the Erlang A model, or $M/M/m+M$ queue, with Poisson arrivals, exponential service times, and $m$ parallel servers, and the property that waiting customers abandon the queue after an exponential time. The queue length process is in this case a birth-death process, for which we obtain explicit expressions for the Laplace transforms of the ...
Knessl C, van Leeuwaarden JS.
europepmc   +7 more sources

Fault equivalent model for non-blocking DC fault ride-through of hybrid MMC

open access: yes电力工程技术, 2023
Compared with full-bridge modular multilevel converter (MMC), the hybrid MMC composed of half bridge sub-module and full bridge sub-module has the low cost and high DC fault ride-through capability.
WANG Zeqing   +5 more
doaj   +1 more source

Reconstructing of Embedded High-Aspect-Ratio Nano-Voids Generated by Ultrafast Laser Bessel Beams

open access: yesMicromachines, 2020
Ultrafast non-diffractive Bessel laser beams provide strong light confinement and show robust advantages for fabricating high-aspect-ratio nanoscale structures inside transparent materials.
Tianqu Chen   +5 more
doaj   +1 more source

Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines

open access: yesEnergies, 2021
This paper presents an electromagnetic transient analysis of lightning-initiated overvoltage stresses of the step-up transformers installed inside a nacelle of onshore, multi-megawatt, new-generation wind turbines.
Petar Sarajcev, Antun Meglic, Ranko Goic
doaj   +1 more source

Transient Dynamic Analysis of Unconstrained Layer Damping Beams Characterized by a Fractional Derivative Model

open access: yesMathematics, 2021
This paper presents a numerical analysis of the influence of mechanical properties and the thickness of viscoelastic materials on the transient dynamic behavior of free layer damping beams.
Mikel Brun   +2 more
doaj   +1 more source

Sensitivity analysis for power plant pumping systems in breakdown [PDF]

open access: yesArchive of Mechanical Engineering, 2018
The small number of available complete modern pump characteristics makes the safety analysis of nuclear and conventional power plants based on the characteristics made over half a century ago of specific speeds n q=24.6, 147.1 and 261.4.
Krzysztof Karaśkiewicz
doaj   +1 more source

Analysis of Transient Interactions between a PWR Nuclear Power Plant and a Faulted Electricity Grid

open access: yesEnergies, 2021
This paper presents the transient stability analysis of a pressurised water-type nuclear power plant following faults and disturbances affecting the electricity grid to which it is connected.
Vineet Vajpayee   +2 more
doaj   +1 more source

The Finite Element Method with High-Order Enrichment Functions for Elastodynamic Analysis

open access: yesMathematics, 2022
Elastodynamic problems are investigated in this work by employing the enriched finite element method (EFEM) with various enrichment functions. By performing the dispersion analysis, it is confirmed that for elastodynamic analysis, the amount of numerical
Xunbai Du   +3 more
doaj   +1 more source

Electroelastic analysis for a sheared D∞ piezoelectric cylinder disturbed by transient temperature distribution

open access: yesMechanical Engineering Journal, 2023
For safe and sound utilization of the applications made of polylactic acid that output an electric signal to an intended mechanical input within an undesirable thermal environment, the transient thermoelectroelastic field is investigated for an infinite ...
Masayuki ISHIHARA   +2 more
doaj   +1 more source

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