Results 11 to 20 of about 3,479 (265)
The Impact Analysis of Beating Vibration for Active Magnetic Bearing
IEEE Access, 2019 In active magnetic bearing (AMB), the beat vibration will affect the flywheel rotary precision. A vibration model, which includes general dynamic stiffness and unbalance response different from the existing vibration research, is proposed to analyze the ...
Hui Gao, Xianhai Meng, Kejun Qian
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Signatures of Vibrational and Electronic Quantum Beats in Femtosecond Coherence Spectra [PDF]
The Journal of Physical Chemistry A, 2021 Femtosecond laser pulses can produce oscillatory signals in transient-absorption spectroscopy measurements. The quantum beats are often studied using femtosecond coherence spectra (FCS), the Fourier domain amplitude, and phase profiles at individual oscillation frequencies.
Paul C. Arpin, Daniel B. Turner
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Morphology-Dependent Coherent Acoustic Phonon Vibrations and Phonon Beat of Au Nanopolyhedrons [PDF]
ACS Omega, 2021 Coherent acoustic phonon vibrations of Au nanopolyhedrons, including nanocubes, nano-octahedrons, and nanocuboctahedrons, in aqueous solutions and poly(vinyl alcohol) (PVA) films, were investigated using transient absorption (TA) spectroscopy combined with finite element analysis based on continuum elastic theory.
Li Wang +5 more
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On Paper Machine Roll Contact with Beating Vibrations [PDF]
PAMM, 2006 AbstractBeating vibration phenomenon observed in paper machine roll units is studied. An analytical model of a roll system is described and an expression for the beating frequency is derived. Numerical results are compared to measurements and conclusions are made based on the observations. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
L. Yuan, V.‐M. Järvenpää
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Molecular vibrations-induced quantum beats in two-dimensional electronic spectroscopy [PDF]
The Journal of Chemical Physics, 2012 Quantum beats in nonlinear spectroscopy of molecular aggregates are often attributed to electronic phenomena of excitonic systems, while nuclear degrees of freedom are commonly included into models as overdamped oscillations of bath constituents responsible for dephasing.
Butkus, Vytautas +2 more
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Buildings, 2023 Based on the cable-stayed beam model, this paper studies the nonlinear coupled vibration behavior of basalt fiber-reinforced polymer (BFRP) cables on long-span cable-stayed bridges under parametric excitation. Considering the sag, damping of BFRP cables,
Yaqiang Yang +6 more
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CNN-based defect diagnosis method for rotating blades
You-qi chuyun, 2020 In order to solve the problem of difficult blade defect diagnosis caused by severe signal under-sampling in tiptiming technology, a defect diagnosis method for rotating blade based on convolution neural network (CNN) was proposed.In the method, the under-
Jiwang ZHANG +3 more
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Research on Soft Flutter of 420m-Span Pedestrian Suspension Bridge and Its Aerodynamic Measures
Buildings, 2022 In order to study the flutter of long-span pedestrian suspension bridge and its aerodynamic control, a 420m-span pedestrian suspension bridge is used as an engineering example, the wind-induced vibration of seven particular aerodynamic sections is ...
Qinghai Guan +4 more
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Software-Defined 1550-nm Full-Fiber Doppler Lidar for Contactless Vibration Measurement of High Voltage Power Equipment [PDF]
Radioengineering, 2023 In this work, a 1550-nm full-fiber Doppler lidar via software-defined platform is built to realize flexible and low-cost contactless vibration measurement of high-voltage power equipment.
X. Guan, C. Lv, G. Zheng, Z. Pan, K. Cai
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Vibration Compensation of the Frequency-Scanning-Interferometry-Based Absolute Ranging System
Applied Sciences, 2019 The frequency-scanning-interferometry-based (FSI-based) absolute ranging technology is a type of ranging technology possessing a high precision and no ranging blind area, so it can be used for non-cooperative targets. However, due to a tiny movement of a
Fu-Min Zhang +4 more
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