arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0804.2064q-fin.STcond-mat.stat-mechq-bio.GN
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长程相关序列的互相关

Cross-correlation of long-range correlated series

Sergio Arianos, Anna Carbone

摘要:

提出了一种在不同滞后$τ$和尺度$n$下估计长相关序列$x(t)$和$y(t)$的互相关$C_{xy}(τ)$的方法。对于Hurst指数为$H_1$和$H_2$的分数布朗运动,$C_{xy}(τ)$的渐近表达式仅依赖于滞后$τ$(广义平稳性),并且是$τ\to 0$的指数为${H_1+H_2}$的$n$的幂.该方法被示出(i)金融系列,以显示杠杆效应;(ii)基因组序列,以估计沿染色体的结构参数之间的相关性。

英文摘要:

A method for estimating the cross-correlation $C_{xy}(τ)$ of long-range correlated series $x(t)$ and $y(t)$, at varying lags $τ$ and scales $n$, is proposed. For fractional Brownian motions with Hurst exponents $H_1$ and $H_2$, the asymptotic expression of $C_{xy}(τ)$ depends only on the lag $τ$ (wide-sense stationarity) and scales as a power of $n$ with exponent ${H_1+H_2}$ for $τ\to 0$. The method is illustrated on (i) financial series, to show the leverage effect; (ii) genomic sequences, to estimate the correlations between structural parameters along the chromosomes.

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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