Results 261 to 270 of about 1,037,140 (298)
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Publications of the Astronomical Society of the Pacific, 1991
The observational characteristics of X-ray bursts are reviewed and the thermonuclear-flash model is examined to assess the suitability of the model and the sources of X- and gamma-ray bursts. The profiles of X-ray bursts from five different sources are delineated, and the global analysis of nuclear burning is discussed to review th range possible X-ray
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The observational characteristics of X-ray bursts are reviewed and the thermonuclear-flash model is examined to assess the suitability of the model and the sources of X- and gamma-ray bursts. The profiles of X-ray bursts from five different sources are delineated, and the global analysis of nuclear burning is discussed to review th range possible X-ray
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Energy relaxation for transient convection in ferrofluids
Physical Review E, 2010The onset of transient instability driven by a coupling of thermal and magnetic effects in an initially quiescent ferrofluid layer is investigated using the energy method. Following the work of Kim [Phys. Lett. A 372, 4709 (2008)], an energy stability criterion is derived for the underlying dynamical system by taking into account the different boundary
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Energy Dissipation in Transient Flow
Fluid Transients, 1994Abstract A model for the computation of energy dissipation in transient flow is presented in this paper. The energy dissipation is used to define a non dimensional parameter that modifies the friction term in the governing equations and allows the computation of unsteady friction losses.
Walter F. Silva-Araya, M. Hanif Chaudhry
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Corrected transient energy function and transient stability limit assessment
2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002This paper reports the developments in the methodology for analysis of transient stability limit conditions. Concepts, including corrected potential energy and corrected potential energy boundary surface, are presented. Efficient criteria in identifying first swing stability behavior are also developed and used in hybrid method incorporating corrected ...
T.S. Chung, D.Z. Fang
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Balance of Electromagnetic Energy in Transients
2019Energy conservation is one of most fundamental rules in physics, which is interpreted as the input energy of any system is equal to the sum of the energy loss, storage and output.
Zhengming Zhao +3 more
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Transient Instability Detection Using Line Transient Potential Energy
Electric Power Components and Systems, 2004Transient instability detection is investigated using a new analytical tool derived from the line transient potential energy. Instead of following the conventional approach of observing the rotor swings or comparing the critical energy and transient energy at fault clearing time, a new instability detection criterion based on the examination of the ...
G. W. CAI +3 more
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A new transient energy function
Science China Technological Sciences, 2002Starting from normalized generators’ equations of rotor motion with respect to the center of inertia of power systems, post-fault power system dynamic is analogized as a motion of a particle with 1.0 mass in an n-dimensional Euclidean space. A rotational coordinate axis is defined for the moving particle.
Dazhong Fang, Wennan Song, Yao Zhang
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Calculation of energy in transient overvoltages
National Symposium on Electromagnetic Compatibility, 2003It is argued that the calculation of the energy in a transient overvoltage using the time integral of V/sup 2/(t)/Z, where Z has the default value of 50 Omega and the voltage, V(t), is that between the hot conductor in the AC line and ground, is inaccurate. A quantitative error analysis is presented that uses an artificial AC line network to simulate a
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Detection of transient signals using the energy operator
IEEE International Conference on Acoustics Speech and Signal Processing, 1993A function of the Teager-Kaiser energy operator is introduced as a method for detecting transient signals in the presence of amplitude-modulated and frequency-modulated tonal interference. This function has excellent time resolution and is robust in the presence of white noise.
Robert B. Dunn +2 more
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Relative Energy And Intelligibility Of Transient Speech Information
Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005., 2006Consonants are recognized to dominate higher frequencies of the speech spectrum and to carry more information than vowels, but both demonstrate quasi-steady state (QSS) and transient components, such as vowel to consonant transitions. Fixed filters somewhat separate these effects, but probably not optimally, given diverse words, speakers, and ...
Sungyub Yoo +7 more
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