Hierarchical Category-Enhanced Prototype Learning for Imbalanced Temporal Recommendation
Xiyue Gao, Zhuoqi Ma, Jiangtao Cui, Xiaofang Xia, Cai Xiang Xu · 2023
Temporal recommendation systems aim to suggest items to users at the optimal time. However, the significant imbalance of items in the training data poses a major challenge to predictive accuracy. Existing approaches attempt to alleviate this issue by modifying the loss function or utilizing resampling techniques, but such approaches may inadvertently amplify the specificity of certain behaviors.