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动态随机系统中的极值。

Extremes in dynamic-stochastic systems.

作者信息

Franzke Christian L E

机构信息

Meteorological Institute and Center for Earth System Research and Sustainability, University of Hamburg, Hamburg, Germany.

出版信息

Chaos. 2017 Jan;27(1):012101. doi: 10.1063/1.4973541.

Abstract

Extreme events capture the attention and imagination of the general public. Extreme events, especially meteorological and climatological extremes, cause significant economic damages and lead to a significant number of casualties each year. Thus, the prediction of extremes is of obvious importance. Here, I will survey the predictive skill and the predictability of extremes using dynamic-stochastic models. These dynamic-stochastic models combine deterministic nonlinear dynamics with a stochastic component, which consists potentially of both additive and multiplicative noise components. In these models, extremes are created by either the nonlinear dynamics, multiplicative noise, or additive heavy-tailed noises. These models naturally capture the observed clustering of extremes and can be used for the prediction of extremes.

摘要

极端事件吸引了公众的关注和想象力。极端事件,尤其是气象和气候极端事件,每年都会造成重大经济损失并导致大量人员伤亡。因此,极端事件的预测显然至关重要。在此,我将使用动态随机模型来考察极端事件的预测技能和可预测性。这些动态随机模型将确定性非线性动力学与一个随机成分相结合,该随机成分可能由加性和乘性噪声成分组成。在这些模型中,极端事件是由非线性动力学、乘性噪声或加性重尾噪声产生的。这些模型自然地捕捉到了观测到的极端事件的聚类现象,可用于极端事件的预测。

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