The Uncertainty of Storm Season Changes: Quantifying the Uncertainty of Autocovariance Changepoints
The Uncertainty of Storm Season Changes: Quantifying the Uncertainty of Autocovariance Changepoints
复制标题
风暴季节变化的不确定性:量化自协方差变化点的不确定性
DOI:
10.1080/00401706.2014.902776
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发表时间:
2015
期刊:
影响因子:
2.5
通讯作者:
Nam C
中科院分区:
文献类型:
--
作者:
Nam C
In oceanography, there is interest in determining storm season changes for logistical reasons such as equipment maintenance scheduling. In particular, there is interest in capturing the uncertainty associated with these changes in terms of the number and location of them. Such changes are associated with autocovariance changes. This article proposes a framework to quantify the uncertainty of autocovariance changepoints in time series motivated by this oceanographic application. More specifically, the framework considers time series under the locally stationary wavelet (LSW) framework, deriving a joint density for scale processes in the raw wavelet periodogram. By embedding this density within a hidden Markov model (HMM) framework, we consider changepoint characteristics under this multiscale setting. Such a methodology allows us to model changepoints and their uncertainty for a wide range of models, including piecewise second-order stationary processes, for example, piecewise moving average processes.
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DOI:
10.2307/3316097
发表时间:
2002-12
期刊:
Canadian Journal of Statistics
影响因子:
--
作者:
Rachel J. Mackay
通讯作者:
Rachel J. Mackay
影响因子:
1
作者:
Nam C
通讯作者:
Nam C
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Rebecca Killick;I. Eckley;P. Jonathan;K. Ewans
通讯作者:
K. Ewans
影响因子:
0.9
作者:
Christopher F. H. Nam;J. Aston;A. M. Johansen
通讯作者:
Christopher F. H. Nam;J. Aston;A. M. Johansen
DOI:
10.1109/ssp.2012.6319672
发表时间:
2012-10
期刊:
2012 IEEE Statistical Signal Processing Workshop (SSP)
影响因子:
--
作者:
Yan Zhou;A. M. Johansen;J. Aston
通讯作者:
Yan Zhou;A. M. Johansen;J. Aston