Results 11 to 20 of about 136,212 (303)
Mitigating Forced Shock-Wave Oscillation with Two-Dimensional Wavy Surface
Aerospace, 2022 Oscillating flow is one challenge for wide-Mach-number-range flight with supersonic/hype-rsonic vehicles. Aiming to mitigate the large-amplitude forced shock-wave oscillation, a 2D wavy surface has been implemented onto the flat-bottomed wall of the ...
Cheng Yao +3 more
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Forced Oscillation Technique and Childhood Asthma
Allergology International, 2012 Most infants and preschool children are not able to voluntarily perform the physiological maneuvers required to complete the pulmonary function tests that are used in adults and older children.
Hiroyuki Mochizuki +2 more
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Forced oscillation of second-order nonlinear dynamic equations on time scales
Electronic Journal of Qualitative Theory of Differential Equations, 2009 In this paper, by defining a class of functions, we establish some oscillation criteria for the second order nonlinear dynamic equations with forced term $$ x^{\Delta\Delta}(t)+a(t)f(x(q(t)))=e(t) $$ on a time scale $\mathbb{T}.$ Our results unify the ...
Tongxing Li +3 more
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Location and Mechanism Analysis of Oscillation Source in Power Plant
IEEE Access, 2020 A generation unit that is poorly damped or has periodical mechanical power outputs from its prime mover can become a source of oscillation in a bulk power system. Choosing the proper electric quantity to extract the oscillation characteristics is crucial
Yanhui Xu, Zheng Gu, Kai Sun
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General Forced Oscillations in a Real Power Grid Integrated with Large Scale Wind Power
Energies, 2016 According to the monitoring of the wide area measurement system, inter-area oscillations happen more and more frequently in a real power grid of China, which are close to the forced oscillation.
Ping Ju +4 more
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Shanghai Jiaotong Daxue xuebao, 2022 There exists the subsynchronous oscillation (SSO) instability risk in large-scale photovoltaic(PV) grid-connected systems with series compensation, which is generally explained by the negative damped oscillation theory.
LIN Yong, KANG Jiale, YU Hao, CHEN Honglin, YANG Yanji, CHEN Wuhui
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Survey on forced oscillations in power system
Journal of Modern Power Systems and Clean Energy, 2017 The oscillations in a power system can be categorized into free oscillations and forced oscillations. Many algorithms have been developed to estimate the modes of free oscillations in a power system.
Mohammadreza GHORBANIPARVAR
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Parametric Resonance versus Forced Oscillation in Time-Evolution of Quantum Meson Fields [PDF]
, 2002 The time-evolution of quantum meson fields in O(4)-linear sigma model is treated approximately. It is shown that the amplification of the amplitudes of pion modes with low momenta occurs by means of both the parametric resonance and the forced ...
Tsue, Y.
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International Journal of Differential Equations, 2016 We are concerned with the interval oscillation of general type of forced second-order nonlinear dynamic equation with oscillatory potential of the form rtg1xt,xΔtΔ+p(t)g2(x(t),xΔ(t))xΔ(t)+q(t)f(x(τ(t)))=e(t), on a time scale T.
Hassan A. Agwa +2 more
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Influence of the ageing process on the resistive and reactive properties of the respiratory system
Clinics, 2009 INTRODUCTION: In an increasingly old society, the study of the respiratory system changes and new techniques dedicated to older patients are of interest in physiologic studies as well as in the diagnosis of respiratory diseases.
Caio Vinicius Villalón e Tramont +4 more
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