Deep Fourier Kernel for Self-Attentive Point Processes

Shixiang Zhu · Minghe Zhang · Ruyi Ding · Yao Xie

[ Abstract ] [ Livestream: Visit Deep Learning / High-dimensionality ]
Thu 15 Apr 2:45 p.m. — 3 p.m. PDT

We present a novel attention-based model for discrete event data to capture complex non-linear temporal dependence structures. We borrow the idea from the attention mechanism and incorporate it into the point processes' conditional intensity function. We further introduce a novel score function using Fourier kernel embedding, whose spectrum is represented using neural networks, which drastically differs from the traditional dot-product kernel and can capture a more complex similarity structure. We establish our approach's theoretical properties and demonstrate our approach's competitive performance compared to the state-of-the-art for synthetic and real data.

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