Results 11 to 20 of about 2,218,426 (289)

Wind Speed Spectrum of a Moving Vehicle under Turbulent Crosswinds

Applied Sciences, 2023
Wind loads have become one of the key influencing factors for the running safety of vehicles and comfort of passengers. The investigation of the wind speed spectrum characteristics of a moving vehicle under turbulent crosswinds is of great importance ...
Qingsong Duan
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Effect of a Novel Tooth Pitting Model on Mesh Stiffness and Vibration Response of Spur Gears

Mathematics, 2022
The existence of pitting failure has a direct influence on the time-varying mesh stiffness (TVMS) and thus changes the vibration properties of the gears.
Jingyu Hou, Shaopu Yang, Qiang Li, Yongqiang Liu   +3 more
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Locating and imaging composite damage based on frequency spectrum detection of lamb waves

Frontiers in Physics, 2022
Lamb wave is widely concerned in damage detection of composite structures due to its long propagation distance and strong sensitivity to damage. In order to solve the problem of damage information extraction, high-precision imaging positioning of damage ...
Wenchao Zhang, Chenhui Su, Yuhang Zhang, Hongjuan Yang   +3 more
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Measuring the Amount of Mechanical Vibration During Lathe Processing [PDF]

Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, 2015
The article provides basic information regarding the measurement and evaluation of mechanical vibration during the processing of material by lathe work. The lathe processing can be characterized as removing material by precisely defined tools.
Štefánia SALOKYOVÁ
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Experiments with the Site Frequency Spectrum [PDF]

Bulletin of Mathematical Biology, 2010
Evaluating the likelihood function of parameters in highly-structured population genetic models from extant deoxyribonucleic acid (DNA) sequences is computationally prohibitive. In such cases, one may approximately infer the parameters from summary statistics of the data such as the site-frequency-spectrum (SFS) or its linear combinations. Such methods
Sainudiin, R, Thornton, K, Harlow, J, Booth, J, Stillman, M, Yoshida, R, Griffiths, R, McVean, G, Donnelly, P   +8 more
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Hawking spectrum and high frequency dispersion [PDF]

Physical Review D, 1996
We study the spectrum of created particles in two-dimensional black hole geometries for a linear, hermitian scalar field satisfying a Lorentz non-invariant field equation with higher spatial derivative terms that are suppressed by powers of a fundamental momentum scale $k_0$. The preferred frame is the ``free-fall frame" of the black hole.
Corley, S., Jacobson, T.
openaire   +3 more sources

Constraints on pre-big bang models for seeding large-scale anisotropy by massive Kalb-Ramond axions [PDF]

, 1998
We discuss the conditions under which pre-big bang models can fit the observed large-scale anisotropy with a primordial spectrum of massive (Kalb--Ramond) axion fluctuations.
A. Buonanno, A. J. Banday, A. Vilenkin, D. Harari, D. Seckel, E. J. Copeland, E. J. Copeland, E. W. Kolb, F. Wilczeck, G. F. Smoot, G. Veneziano, G. Veneziano, J. E. Kim, J. E. Lidsey, J. Preskill, L. M. Abbott, M. Axenides, M. Dine, M. Dine, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, M. Gasperini, P. Sikivie, R. Brustein, R. Brustein, R. Brustein, R. C. Ritter, R. Davis, R. Durrer, R. Durrer, R. K. Sachs, S. Weinberg, V. F. Mukhanov, V. Kaplunovsky, V. Kaspi, Y. Nambu   +40 more
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Connection Between Damping Torque Analysis and Energy Flow Analysis in Damping Performance Evaluation for Electromechanical Oscillations in Power Systems

Journal of Modern Power Systems and Clean Energy, 2022
The damping performance evaluation for electro-mechanical oscillations in power systems is crucial for the stable operation of modern power systems. In this paper, the connection between two commonly-used damping performance evaluation methods, i.e., the
Yong Hu, Siqi Bu, Xin Zhang, Chi Yung Chung, Hui Cai   +4 more
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Semiconductor optical amplifier-based heterodyning detection for resolving optical terahertz beat-tone signals from passively mode-locked semiconductor lasers [PDF]

, 2010
An all-optical heterodyne approach based on a room-temperature controlled semiconductor optical amplifier (SOA) for measuring the frequency and linewidth of the terahertz beat-tone signal from a passively mode-locked laser is proposed.
Carney, Kevin, Landais, Pascal, Latkowski, Sylwester, Maldonado-Basilio, Ramón, Parra-Cetina, Josué, Philippe, Severine   +5 more
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Alpha peak activity in resting-state EEG is associated with depressive score

Frontiers in Neuroscience, 2023
IntroductionDepression is a serious psychiatric disorder characterized by prolonged sadness, loss of interest or pleasure. The dominant alpha peak activity in resting-state EEG is suggested to be an intrinsic neural marker for diagnosis of mental ...
Peng Zhou, Peng Zhou, Qian Wu, Liying Zhan, Zhihan Guo, Chaolun Wang, Shanze Wang, Qing Yang, Jiating Lin, Fangyuan Zhang, Lu Liu, Dehui Lin, Wenbin Fu, Wenbin Fu, Wenbin Fu, Xiang Wu   +15 more
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