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1) derivative time constant 微分时间常数2) adjustable dervied time constant 可调微分时间常数3) derivate-action time constant 微分作用时间常数4) integration time constant 积分时间常数 1. On the basis of measure principle of micro-power magnetic flux used by electronic integrator,a new kind of...
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Modeling Rayleigh wave in viscoelastic media with constant Q model using fractional time derivatives A novel modeling method based on CQ model is proposed for Rayleigh waves.AEA are introduced into the fractional derivative wave equation for free boundary... J Fan,P Zhu,W Cai,... - 《Journal...
T2* is the time constant for decay of the oscillations on the trailing edge of the signal, and is also the decay time constant that would be observed for a free induction decay (FID). Although the definition of the rapid-scan regime is that the magnetic field scans through the signal in...
Variational time discretization schemes are getting of increasing importance for the accurate numerical approximation of transient phenomena. The applicability and value of mixed finite element methods in space for simulating transport processes have been demonstrated in a wide class of works. We consider ...
The flux and current observers include a sliding function, which is derivative of the flux. Therefore, when the estimated current converges to the measured one, the sliding function itself is integrated to calculate the flux magnitude and angle. The flux angle is then used for the DFO control....
A neutral system is a system with a delay in both the state and the derivative of the state, with the one in the derivative being called a neutral delay. That makes it more complicated than a system with a delay in only the state. Neutral delays occur not only in physical systems, but...
The central role is played by the tensorial xc kernel which is the functional derivative of the xc vector potential with respect to the current-density, for the ground-state of a slowly-varying periodically modulated electron gas. This functional is constructed in the linear response regime, ...
This allows us to clarify mathematical inconsistencies found in previous seminal works when dealing with viscoelastic attenuation and/or odd-order derivative terms in the equation of motion. We then discuss some methodologies for the numerical implementation of the method in the time domain and to ...