Second‐order preserving point process permutations
Second‐order preserving point process permutations
复制标题
二阶保留点过程排列
作者:
Mohler, George;Mateu, Jorge
While random permutations of point processes are useful for generating counterfactuals in bivariate interaction tests, such permutations require that the underlying intensity be separable. In many real‐world datasets where clustering or inhibition is present, such an assumption does not hold. Here, we introduce a simple combinatorial optimization algorithm that generates second‐order preserving (SOP) point process permutations, for example, permutations of the times of events such that thefunction of the permuted process matches thefunction of the data. We apply the algorithm to synthetic data generated by a self‐exciting Hawkes process and a self‐avoiding point process, along with data from Los Angeles on earthquakes and arsons and data from Indianapolis on law enforcement drug seizures and overdoses. In all cases, we are able to generate a diverse sample of permuted point processes where the distribution of thefunctions closely matches that of the data. We then show how SOP point process permutations can be used in two applications: (1) bivariate Knox tests and (2) data augmentation to improve deep learning‐based space‐time forecasts.
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影响因子:
1.9
作者:
S. Flaxman;Daniel B. Neill;Alex Smola
通讯作者:
Alex Smola
DOI:
10.1098/rspa.2021.0195
发表时间:
2021
期刊:
Physical and Engineering Sciences
影响因子:
--
作者:
Mohler, G.;Mishra, S.;Ray, B.;Magee, L.;Huynh, P.;Canada, M.;O’Donnell, D.;Flaxman, S.
通讯作者:
Flaxman, S.
影响因子:
2.3
作者:
J. Mateu;A. Jalilian
通讯作者:
A. Jalilian
DOI:
--
发表时间:
2017-07
期刊:
ArXiv
影响因子:
--
作者:
Bao Wang;Duo Zhang;Duanhao Zhang;P. Brantingham;A. Bertozzi
通讯作者:
Bao Wang;Duo Zhang;Duanhao Zhang;P. Brantingham;A. Bertozzi