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arXiv 0705.2265nlin.CD
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时空混沌大系统的状态估计

Estimating the State of Large Spatiotemporally Chaotic Systems

Matthew Cornick, Brian Hunt, Edward Ott, Michael F. Schatz

摘要:

数据同化是指使用系统时间演变模型和可能有噪声和不完整的时间序列测量值来获得系统状态估计值的过程。然而,由于实际的原因,大时空混沌系统的高维性阻止了经典数据同化技术的使用。在这里,通过对大纵横比Rayleigh-Benard对流的典型例子的数值计算,我们证明了最近开发的数据同化方法的适用性,旨在规避这一困难。此外,我们描述的算法估计未知系统参数的扩展。我们的研究结果表明,我们的数据同化技术的潜在有用性,在广泛的一类情况下,有时空混沌行为。

英文摘要:

Data assimilation refers to the process of obtaining an estimate of a system's state using a model for the system's time evolution and a time series of measurements that are possibly noisy and incomplete. However, for practical reasons, the high dimensionality of large spatiotemporally chaotic systems prevents the use of classical data assimilation techniques. Here, via numerical computations on the paradigmatic example of large aspect ratio Rayleigh-Benard convection, we demonstrate the applicability of a recently developed data assimilation method designed to circumvent this difficulty. In addition, we describe extensions of the algorithm for estimating unknown system parameters. Our results suggest the potential usefulness of our data assimilation technique to a broad class of situations in which there is spatiotemporally chaotic behavior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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