Results 11 to 20 of about 796,849 (314)
Applied Sciences, 2021 The active magnetic bearings system plays a vital role in high-speed rotors technology, where many research articles have discussed the nonlinear dynamics of different categories of this system such as the four-pole, six-pole, eight-pole, and sixteen ...
Sabry M. El-Shourbagy +5 more
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The characteristics of continuous gravity changes in Qiongzhong seismic station
地震科学进展, 2020 This paper collected the continuous gravity observation data from Qiongzhong seismic station since 2009. After processing the raw data with sudden jumps，steps and error data，we calculated and analyzed the characteristics of the gravity tide data from ...
Jialin Wu +5 more
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Modelling and Study of the Effect of Geometrical Parameters of Piezoelectric Plate and Stack
Applied Sciences, 2021 The piezoelectric stack is employed as an actuator and a sensor in a variety of technical applications. The dynamic modelling of piezoelectric plates and stack is used to investigate and search for new applications in mechatronics systems that are based ...
Tolera G. Degefa +2 more
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Acoustic frequency spectrum characteristics in periodic drill string under tension
Energy Science & Engineering, 2020 It is a promising measure to transmit downhole information by acoustic wave through drill string. However, the transmission distance and quality of acoustic signals in field conditions are still not satisfied because the acoustic frequency spectrum in ...
Qing Wang, Zhichuan Guan, Yongwang Liu
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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.
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Applied Sciences, 2020 Woodwork is one of the occupations with high levels of noises. This pilot study attempted to simulate woodworkers’ occupational noise exposure by integrating frequency spectra measured from individual power tools with the respective time of tool use ...
Yu-Ping Zheng +2 more
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A High-Resolution Dyadic Transform for Non-Stationary Signal Analysis
Mathematics, 2021 This article shows a new Te-transform and its periodogram for applications that mainly exhibit stochastic behavior with a signal-to-noise ratio lower than −30 dB.
Eduardo Trutié-Carrero +2 more
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Sensors, 2022 Insulator diagnostics is still a topical issue. No one has yet found out how to accurately determine the condition of all insulators and decide when replacement or maintenance is required.
Ľuboš Šárpataky +5 more
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Biomedicines, 2022 Synucleins comprise a family of small proteins highly expressed in the nervous system of vertebrates and involved in various intraneuronal processes. The malfunction of alpha-synuclein is one of the key events in pathogenesis of Parkinson disease and ...
Vasily Vorobyov +6 more
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Comparison of focusing of short pulses in the Debye approximation [PDF]
Компьютерная оптика, 2018 We have examined different types of pulses and features of their frequency spectra. Calculations have shown that a significant distinction between the pulses only takes place at a very short pulse duration (shorter than the oscillation period).
Svetlana Khonina +2 more
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