Results 31 to 40 of about 1,518,407 (321)
R modes of slowly pulsating B stars [PDF]
, 2005 We examine pulsational stability of low $m$ $r$ modes in SPB stars by calculating fully nonadiabatic oscillations of uniformly rotating stars, where $m$ is an integer representing the azimuthal wave number around the rotation axis.
Lee, Umin
core +2 more sources
IEEE Access, 2020 One of the main reasons that affecting the stability of power systems is low frequency oscillation (LFO). The existence of noise influences the accuracy of LFO mode identification extracted from wide-area measurement system (WAMS).
Jian Chen, Xin Li, M. A. Mohamed, T. Jin
semanticscholar +1 more source
Householder-based Prony Method for Identification of Low-frequency Oscillation in Power System [PDF]
E3S Web of Conferences, 2019 In this paper, the Prony analysis tool with the software used in the actual operation has a large error. The improved Prony method is used to identify the low-frequency oscillation mode of the power system. The traditional Prony algorithm has the problem
Zhang Simin +3 more
doaj +1 more source
KiloHertz quasi-periodic oscillations difference frequency exceeds inferred spin frequency in 4U 1636-53 [PDF]
, 2002 Recent observations of the low-mass X-ray binary 4U 1636-53 with the Rossi X-ray Timing Explorer show, for the first time, a kiloHertz quasi-periodic oscillation (kHz QPO) peak separation that exceeds the neutron star spin frequency as inferred from ...
Alpar +36 more
core +4 more sources
Analysis of Mode Interaction in Ultra-low Frequency Oscillation Based on Trajectory Eigenvalue
Journal of Modern Power Systems and Clean Energy, 2020 Complex phenomena such as prolongedly undamped ultra-low frequency oscillation (ULFO) and eigenmode re-excitation are observed in the simulations of hydroelectric power systems.
Yusheng Xue, Zijun Bin
semanticscholar +1 more source
Energies, 2020 In recent years, ultralow-frequency oscillation has repeatedly occurred in asynchronously connected regional power systems and brought serious threats to the operation of power grids.
Sijia Wang +3 more
semanticscholar +1 more source
Zhongguo dianli, 2023 With significant increase of penetration of electronic equipment in the power system, the low-frequency oscillation problem of the power system under disturbance are becoming increasingly prominent.
Kangkang WANG +5 more
doaj +1 more source
Identification of low frequency oscillation modes in large transmission systems
Revista Facultad de Ingeniería Universidad de Antioquia, 2017 There is a typical dynamical performance associated with every system. Oscillations are phenomena inherent to dynamical systems and the analysis of such phenomena is a fundamental issue for understanding the dynamical behavior of a particular system ...
Jorge Guillermo Calderón-Guizar +2 more
doaj +3 more sources
Current self-oscillations, spikes and crossover between charge monopole and dipole waves in semiconductor superlattices [PDF]
, 1999 Self-sustained current oscillations in weakly-coupled superlattices are studied by means of a self-consistent microscopic model of sequential tunneling including boundary conditions naturally.
Aguado, Ramon +4 more
core +3 more sources
An Investigation on Low Frequency Combustion Oscillation [PDF]
, 1970 This paper deals with a combustion stability of diffusion flame. A simplified linear differential equation of second order, which involves the parameters estimated from the states of steady combustion, has been suggested to discuss theoretically the ...
Shimamoto, Yuzuru, Tanaka, Yutaka
core +1 more source