Online Learning for Multivariate Hawkes Processes
Online Learning for Multivariate Hawkes Processes
复制标题
多元霍克斯过程的在线学习
DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
N. Kiyavash
中科院分区:
文献类型:
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作者:
Yingxiang Yang;Jalal Etesami;Niao He;N. Kiyavash
We develop a nonparametric and online learning algorithm that estimates the triggering functions of a multivariate Hawkes process (MHP). The approach we take approximates the triggering function $f_{i,j}(t)$ by functions in a reproducing kernel Hilbert space (RKHS), and maximizes a time-discretized version of the log-likelihood, with Tikhonov regularization. Theoretically, our algorithm achieves an $\calO(\log T)$ regret bound. Numerical results show that our algorithm offers a competing performance to that of the nonparametric batch learning algorithm, with a run time comparable to the parametric online learning algorithm.
影响因子:
1.1
作者:
Flaxman S
通讯作者:
Flaxman S
影响因子:
8.1
作者:
Gheorghe, AV;Birchmeier, J;Kröger, W
通讯作者:
Kröger, W