نتایج جستجو برای: wake oscillator model

تعداد نتایج: 2145478  

Journal: :SIAM J. Applied Dynamical Systems 2012
Cecilia G. Diniz Behn Victoria Booth

Waking and sleep states are regulated by the coordinated activity of a number of neuronal population in the brainstem and hypothalamus whose synaptic interactions compose a sleep-wake regulatory network. Physiologically based mathematical models of the sleep-wake regulatory network contain mechanisms operating on multiple time scales including relatively fast synaptic-based interations between ...

2018
Fernando Cardes Andrés Quintero Eric Gutierrez Cesare Buffa Andreas Wiesbauer Luis Hernández

This paper analyzes the influence of phase noise and distortion on the performance of oscillator-based sensor data acquisition systems. Circuit noise inherent to the oscillator circuit manifests as phase noise and limits the SNR. Moreover, oscillator nonlinearity generates distortion for large input signals. Phase noise analysis of oscillators is well known in the literature, but the relationsh...

1999
ROBERTO CELI Colin Theodore Roberto Celi

This paper presents a study on the effect of wake modeling on the prediction of the off-axis response to pilot inputs for a hingeless and an articulated rotor helicopter, including a comparison with flight test data. The free wake model can capture geometry changes due to maneuvering flight. The prediction of the response to pilot inputs improves only slightly; in particular, the off-axis respo...

Journal: :Nonlinear Dynamics 2021

Abstract A nonlinear mathematical model is developed in the time domain to simulate behaviour of two identical flexibly mounted cylinders tandem while undergoing vortex-induced vibration (VIV). Subsequently, validated and modified against experimental results. Placing an array bluff bodies proximity frequently happens different engineering fields. Chimney stacks, power transmission lines oil pr...

2014
Pieter M.O. Gebraad J. W. van Wingerden

Abstract. In this paper, we present a novel control-oriented model for predicting wake effects in wind plants, called the FLOw Redirection and Induction Dynamics (FLORIDyn) model. The model predicts the wake locations and the effective flow velocities at each turbine, and the resulting turbine electrical energy productions, as a function of the control degrees of freedom of the turbines (the ax...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2015
Jens N Sørensen Robert F Mikkelsen Dan S Henningson Stefan Ivanell Sasan Sarmast Søren J Andersen

The actuator line technique was introduced as a numerical tool to be employed in combination with large eddy simulations to enable the study of wakes and wake interaction in wind farms. The technique is today largely used for studying basic features of wakes as well as for making performance predictions of wind farms. In this paper, we give a short introduction to the wake problem and the actua...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2013
W M J Batten M E Harrison A S Bahaj

The actuator disc-RANS model has widely been used in wind and tidal energy to predict the wake of a horizontal axis turbine. The model is appropriate where large-scale effects of the turbine on a flow are of interest, for example, when considering environmental impacts, or arrays of devices. The accuracy of the model for modelling the wake of tidal stream turbines has not been demonstrated, and...

Journal: :Journal of Visualization and Computer Animation 2017
Xiangyun Liao Weixin Si Biao Xu Zhi-Yong Yuan Qiong Wang Pheng-Ann Heng

Turbulent wake is crucial for the visually appealing effects of liquid. Unfortunately, it is challenging to realistically simulate this phenomenon with ring-shaped vortical structures. To tackle this issue, we propose a filament-based turbulent wake synthesis method for realistically simulating the turbulent wake with ring-shaped vortical structures. The filaments are sampled at the separation ...

Journal: :Psychological research 2002
Douglas Eck

A relaxation oscillator model of neural spiking dynamics is applied to the task of finding downbeats in rhythmical patterns. The importance of downbeat discovery or 'beat induction' is discussed, and the relaxation oscillator model is compared to other oscillator models. In a set of computer simulations the model is tested on 35 rhythmical patterns. The model performs well, making good predicti...

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