Bayesian comparison of stochastic models of dispersion
Bayesian comparison of stochastic models of dispersion
复制标题
离散随机模型的贝叶斯比较
DOI:
10.1017/jfm.2022.472
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发表时间:
2022
影响因子:
3.7
通讯作者:
Brolly M
中科院分区:
文献类型:
--
作者:
Brolly M
Stochastic models of varying complexity have been proposed to describe the dispersion of particles in turbulent flows, from simple Brownian motion to complex temporally and spatially correlated models. A method is needed to compare competing models, accounting for the difficulty in estimating the additional parameters that more complex models typically introduce. We employ a data-driven method, Bayesian model comparison, which assigns probabilities to competing models based on their ability to explain observed data. We focus on the comparison between the Brownian and Langevin dynamics for particles in two-dimensional isotropic turbulence, with data that consist of sequences of particle positions obtained from simulated Lagrangian trajectories. We show that, while on sufficiently large time scales the models are indistinguishable, there is a range of time scales on which the Langevin model outperforms the Brownian model. While our set-up is highly idealised, the methodology developed is applicable to more complex flows and models of particle dynamics.
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影响因子:
16.6
作者:
Mark C;Metzner C;Lautscham L;Strissel PL;Strick R;Fabry B
通讯作者:
Fabry B
DOI:
--
发表时间:
2006
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
R.K. Scott
通讯作者:
R.K. Scott
影响因子:
4.6
作者:
A. Bracco;J. LaCasce;C. Pasquero;A. Provenzale
通讯作者:
A. Provenzale
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
A. Provenzale;A. Babiano;B. Villone
通讯作者:
B. Villone
影响因子:
3.7
作者:
A. Bracco;J. McWilliams
通讯作者:
A. Bracco;J. McWilliams