Resonance analysis of gyroscopic nonlinear spinning shafts with parametric excitations and speed fluctuations

2012 ◽  
Vol 64 (1) ◽  
pp. 94-109 ◽  
Author(s):  
Majid Shahgholi ◽  
Siamak Esmaeilzadeh Khadem
Keyword(s):  
Resonance Analysis ◽  
Speed Fluctuations

Methods to aggregate turbine and network impedance for wind farm resonance analysis

2019 ◽  
Vol 14 (8) ◽  
pp. 1304-1311
Author(s):  
Haijiao Wang ◽  
Christoph Buchhagen ◽  
Jian Sun
Keyword(s):  
Wind Farm ◽  
Resonance Analysis

scholarly journals Tunneling Spectroscopy by Nuclear Magnetic Resonance: Analysis of Rotational Tunneling in Solid Pentamethylbenzene

1985 ◽  
Vol 40 (11) ◽  
pp. 1075-1084
Author(s):  
W. T. Sobol ◽  
K.R. Sridharan ◽  
I. G. Cameron ◽  
M. M. Pintar
Keyword(s):  
Frequency Dependence ◽  
Lattice Relaxation ◽  
Time Correlation ◽  
Lattice Relaxation Time ◽  
Polarization Transfer ◽  
Spin Lattice Relaxation ◽  
Transfer Model ◽  
Nuclear Magnetic Resonance Analysis ◽  
Spin Lattice ◽  
Resonance Analysis

The frequency dependence of the spin-lattice relaxation time T1 was measured at three temperatures near one of the Zeeman-tunneling level matching resonances for pentamethylbenzene. These measurements are correlated with 71 temperature dependence data from the literature. It is shown that the frequency dependence of the Zeeman-torsion coupling time cannot be explained in terms of the semiclassical perturbation theory using time correlation functions. A three bath polarization transfer model is also employed and the applicability of both models discussed. Zeeman-torsion coupling is further investigated using a saturation sequence and the results are compared with the predictions of the three bath polarization transfer model.

Sign in / Sign up

Export Citation Format

Share Document