Results 21 to 30 of about 499,713 (313)

Resonant and antiresonant frequencies of multiple cracked bar

open access: yesVietnam Journal of Mechanics, 2019
The natural frequencies or related resonant frequencies have been widely used for crack detection in structures by the vibration-based technique. However, antiresonant frequencies, the zeros of frequency response function, are less involved to use for ...
P. T. B. Lien, N. T. Khiem
doaj   +1 more source

Explicit Solution of the Time Domain Volume Integral Equation Using a Stable Predictor-Corrector Scheme [PDF]

open access: yes, 2012
An explicit marching-on-in-time (MOT) scheme for solving the time domain volume integral equation is presented. The proposed method achieves its stability by employing, at each time step, a corrector scheme, which updates/corrects fields computed by the ...
Bağcı, H   +11 more
core   +1 more source

Frequency conversion based on three-wave parametric solitons [PDF]

open access: yes, 2010
Parametric three-wave mixing in quadratic nonlinear crystals provides a versatile means of achieving widely tunable frequency conversion of laser light, thus permitting a substantial extension of the wavelength coverage of laser sources across broad ...
Degasperis, Antonio   +17 more
core   +1 more source

Nonlinear Schrödinger equation and frequency saturation [PDF]

open access: yesAnalysis & PDE, 2012
We propose an approach that permits to avoid instability phenomena for the nonlinear Schrodinger equations. We show that by approximating the solution in a suitable way, relying on a frequency cut-off, global well-posedness is obtained in any Sobolev space with nonnegative regularity.
openaire   +4 more sources

Improved equation to describe the induction motor currents during nearby three‐phase short‐circuits

open access: yesIET Electric Power Applications, 2023
This article shows an improved equation to describe the induction motor currents during a three‐phase short‐circuit near to motor terminals. The proposed equation considers three details which are not in the equation shown in the IEEE Std.
Elmer Sorrentino, Andres Vera
doaj   +1 more source

High-Frequency Solutions to the Constraint Equations

open access: yesCommunications in Mathematical Physics, 2023
36 pages, revised version after referee reports, accepted in Communications in Mathematical ...
openaire   +2 more sources

Day-Ahead Scheduling Considering Demand Response as a Frequency Control Resource

open access: yesEnergies, 2017
The development of advanced metering technologies makes demand response (DR) able to provide fast response services, e.g., primary frequency control. It is recognized that DR can contribute to the primary frequency control like thermal generators.
Yu-Qing Bao   +4 more
doaj   +1 more source

Accurate Dynamic Analysis Method of Cable-Damper System Based on Dynamic Stiffness Method

open access: yesBuildings
To suppress large vibrations of the cable in cable-stayed bridges, it is common to install transverse dampers near the end of the cable. This paper focuses on the cable-damper system; based on the dynamic stiffness method, an accurate dynamic analysis ...
Hui Jiao   +4 more
doaj   +1 more source

Hawking radiation power equations for black holes

open access: yesNuclear Physics B, 2017
We derive the Hawking radiation power equations for black holes in asymptotically flat, asymptotically Anti-de Sitter (AdS) and asymptotically de Sitter (dS) black holes. This is done by using the greybody factor for these black holes.
Ravi Mistry   +3 more
doaj   +1 more source

Resilient modulus and cumulative plastic strain of frozen silty clay under dynamic aircraft loading

open access: yesSN Applied Sciences, 2021
Article Highlights The empirical equation for resilient modulus and temperature is a segmented function; the segmentation point is − 5 °C. The empirical equation for resilient modulus and frequency is a segmented function; the segmentation point is 2 Hz.
Xiaolan Liu   +2 more
doaj   +1 more source

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