论文标题
DACSR:脱钩的端到端校准顺序推荐
DACSR: Decoupled-Aggregated End-to-End Calibrated Sequential Recommendation
论文作者
论文摘要
顺序建议在准确预测用户的未来行为方面取得了长足的进步。但是,仅寻求准确性可能会带来副作用,例如不公平和过度专业的建议结果。在这项工作中,我们专注于校准建议的校准建议,该建议与公平和多样性有关。一方面,它旨在提供更公平的建议,其偏好分布与用户的历史行为一致。另一方面,它可以在一定程度上改善建议的多样性。但是现有的校准方法主要依赖于候选列表上的后处理,这需要更多的计算时间来生成建议。此外,它们无法建立准确性和校准之间的关系,从而导致准确性的限制。为了解决这些问题,我们提出了一个端到端框架,以提供准确和校准的建议以进行顺序建议。我们设计了一个目标功能来校准推荐清单和历史行为之间的兴趣。我们还提供了分配修改方法来改善多样性并减轻利益不平衡的影响。此外,我们设计了一个解耦聚集的模型来改善建议。该框架将两个目标分配给两个单独的序列编码器,并通过提取有用的信息来汇总输出。基准数据集上的实验验证了我们提出的模型的有效性。
Sequential recommendations have made great strides in accurately predicting the future behavior of users. However, seeking accuracy alone may bring side effects such as unfair and overspecialized recommendation results. In this work, we focus on the calibrated recommendations for sequential recommendation, which is connected to both fairness and diversity. On the one hand, it aims to provide fairer recommendations whose preference distributions are consistent with users' historical behaviors. On the other hand, it can improve the diversity of recommendations to a certain degree. But existing methods for calibration have mainly relied on the post-processing on the candidate lists, which require more computation time in generating recommendations. In addition, they fail to establish the relationship between accuracy and calibration, leading to the limitation of accuracy. To handle these problems, we propose an end-to-end framework to provide both accurate and calibrated recommendations for sequential recommendation. We design an objective function to calibrate the interests between recommendation lists and historical behaviors. We also provide distribution modification approaches to improve the diversity and mitigate the effect of imbalanced interests. In addition, we design a decoupled-aggregated model to improve the recommendation. The framework assigns two objectives to two individual sequence encoders, and aggregates the outputs by extracting useful information. Experiments on benchmark datasets validate the effectiveness of our proposed model.