Rare event computation in deterministic chaotic systems using genealogical particle analysis
Rare event computation in deterministic chaotic systems using genealogical particle analysis
复制标题
使用谱系粒子分析计算确定性混沌系统中的罕见事件
DOI:
10.1088/1751-8113/49/37/374002
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
F. Bouchet
中科院分区:
文献类型:
--
作者:
J. Wouters;F. Bouchet
In this paper we address the use of rare event computation techniques to estimate small over-threshold probabilities of observables in deterministic dynamical systems. We demonstrate that genealogical particle analysis algorithms can be successfully applied to a toy model of atmospheric dynamics, the Lorenz ’96 model. We furthermore use the Ornstein–Uhlenbeck system to illustrate a number of implementation issues. We also show how a time-dependent objective function based on the fluctuation path to a high threshold can greatly improve the performance of the estimator compared to a fixed-in-time objective function.