Jiandong Ding

Zero-Observation User Reactivation with Gap-Driven Dimensional Gating

Jiandong Ding, Tianying Liu, Fuyuan Liu, Huijie Qin, Tiandeng Wu

Sequential recommendation (SR) models capture continuously observed behavior, but a returning user may have no interactions for months or years. We define this setting as Zero-Observation Reactivation: the user has a pre-gap history, while the platform observes no behavioral sign…Read more