作者位次 #3/3SIGIR 2026Poster· Information Retrieval (Industry)
Don't Contrast the Impossible: Region-Constrained Batching for Contrastive User Modeling on a Local Community Platform
Seungho Han · Byeongchang Kim · Jin Yu
摘要
Contrastive learning is widely used for user modeling in large-scale recommender systems, where standard in-batch negatives implicitly assume universal exposure that any user can be shown any item. On local community platforms such as Karrot, however, exposure is geographically constrained; many...