Heterogeneous Attribute Embedding and Sequence Modeling for Recommendation with Implicit Feedback

Friday, March 17, 2017, 3:00 pm - 4:00 pm PSTiCal
11th Flr Conf Room-CR #1135
This event is open to the public.
NL Seminar
Kuan Liu (USC/ISI)

Abstract: Incorporating implicit feedback into a recommender system is a challenging problem due to sparse and noisy observations. I will present our approaches that exploit heterogeneous attributes and sequence properties within the observations. We build a neural network framework to embed heterogeneous attributes in an end-to-end fashion, and apply the framework to three sequence-based models. Our methods achieve significant improvements on four large-scale datasets compared to state-of-the-art baseline models (30% to 90% relative increase in NDCG). Experimental results show that attribute embedding and sequence modeling both lead to improvements and, further, that our novel output attribute layer plays a crucial role. I will conclude with our exploratory studies that investigate why sequence modeling works well in recommendation systems and advocate its use for large scale recommendation tasks.

Bio: Kuan Liu is a fifth year Ph.D. student at ISI/USC working with Prof. Prem Natarajan. Before that, He received a bachelor degree from Tsinghua University with a major in Computer Science. His research interests include machine learning, large scale optimization, deep learning, and applications to recommender systems, network analysis.

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