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arXiv 0803.1706q-fin.STphysics.data-an
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极端事件的返回间隔分布与长期记忆

Return interval distribution of extreme events and long term memory

M. S. Santhanam, Holger Kantz

摘要:

极端事件之间的重现时间或重现间隔的分布对于描述和理解许多学科中物理系统和现象的行为非常重要。众所周知,自然界和社会中的许多物理过程都具有长程相关性。因此,在过去的几年里,相当多的研究工作已被导向研究返回间隔的分布,为长期相关的时间序列。数值模拟结果表明,收益率区间分布是拉伸指数型分布。本文给出了长相关时间序列中收益区间分布的一个解析表达式,该表达式在平均收益区间较大时成立。我们发现,该分布实际上是一个产品的幂律和拉伸指数形式。我们还讨论了制度的有效性,并进行详细的研究如何回报区间分布取决于用于定义极端事件的阈值。

英文摘要:

The distribution of recurrence times or return intervals between extreme events is important to characterize and understand the behavior of physical systems and phenomena in many disciplines. It is well known that many physical processes in nature and society display long range correlations. Hence, in the last few years, considerable research effort has been directed towards studying the distribution of return intervals for long range correlated time series. Based on numerical simulations, it was shown that the return interval distributions are of stretched exponential type. In this paper, we obtain an analytical expression for the distribution of return intervals in long range correlated time series which holds good when the average return intervals are large. We show that the distribution is actually a product of power law and a stretched exponential form. We also discuss the regimes of validity and perform detailed studies on how the return interval distribution depends on the threshold used to define extreme events.

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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