Amazon Proposes New Multi-Interest Retrieval Method
_reachsumit · x · 2026-07-10
Amazon introduces BACH, a Bayesian Admixture of Contrastive Heads approach designed for multi-interest two-tower retrieval. The paper employs a variational mixture model with soft routing to train all interest heads, aiming to alleviate head collapse and boost multi-interest retrieval performance.
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