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arXiv 2004.03569stat.MEstat.ML
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高维多变量点过程的隐网络结构学习

Latent Network Structure Learning from High Dimensional Multivariate Point Processes

Biao Cai, Jingfei Zhang, Yongtao Guan

摘要:

从大规模多变量点过程数据中学习潜在网络结构是科学和商业应用中的一项重要任务。例如,我们可能希望根据从神经元集合中记录的尖峰时间来估计神经元功能连接网络。为了表征所观察到的数据的复杂过程,我们提出了一个新的和灵活的类的非平稳霍克斯过程,允许兴奋和抑制效应。我们估计潜在的网络结构,使用一个有效的稀疏最小二乘估计方法。利用稀疏表示,我们建立了Hawkes过程的一阶和二阶顺序统计量的集中不等式.这些理论结果使我们能够建立非渐近误差界和选择的一致性估计参数。此外,我们描述了一个最小二乘损失为基础的统计测试,如果背景强度是恒定的时间。我们证明了我们所提出的方法的有效性,通过模拟研究和应用程序的神经元尖峰训练数据集。

英文摘要:

Learning the latent network structure from large scale multivariate point process data is an important task in a wide range of scientific and business applications. For instance, we might wish to estimate the neuronal functional connectivity network based on spiking times recorded from a collection of neurons. To characterize the complex processes underlying the observed data, we propose a new and flexible class of nonstationary Hawkes processes that allow both excitatory and inhibitory effects. We estimate the latent network structure using an efficient sparse least squares estimation approach. Using a thinning representation, we establish concentration inequalities for the first and second order statistics of the proposed Hawkes process. Such theoretical results enable us to establish the non-asymptotic error bound and the selection consistency of the estimated parameters. Furthermore, we describe a least squares loss based statistic for testing if the background intensity is constant in time. We demonstrate the efficacy of our proposed method through simulation studies and an application to a neuron spike train data set.

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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