融合项目直接关联实体传播的IEP-CKAN推荐方法

IEP-CKAN Recommendation Method Integrating Item Directly Related Entity Propagation

摘要: 面向推荐系统的协同知识感知注意网络(Collaborative Knowledge-Aware Attentive Network for Recommender Systems，简称CKAN)没有优化与项目直接关联实体的嵌入表示，且没有考虑不同传播层次的重要性以及用户点击物品间的关联信息，使推荐实体不够准确。因此，提出一种融合项目直接关联实体传播的推荐算法(Items are Directly Associated with Entity Propagation - Collaborative Knowledge-aware Attentive Network for Recommender Systems，简称IEP-CKAN)，在IEP-CKAN中将优化与项目直接关联实体的嵌入表示，并融入Ripple Net模型思想在利用波纹集信息时给予靠近中心节点的层次信息更大或更小的权重，再通过无序编码器挖掘用户点击物品间的关联信息，最终计算出推荐结果。实验结果表明，与CKAN相比该方法在Last. FM数据集上将AUC和F1的值提高了1.1%和1.3%，在Book-Crossing数据集上将AUC和F1的值提高了0.9%和1.0%，证明该方法能够进一步提高推荐模型的性能。

Abstract: The Collaborative Knowledge-aware Attentive Network for Recommender Systems (CKAN) does not optimize the embedded representation of entities directly associated with the project. Moreover, the importance of different communication levels and the correlation information between items clicked by users are not considered, so the recommended entity is not accurate enough. Therefore, This paper proposes a recommendation algorithm (Items are Directly Associated with Entity Propagation - Collaborative Knowledge-aware Attentive) Network for Recommender Systems (IEP-CKAN for short) puts the embedded representation of entities directly related to the optimization project in IEP-CKAN, and incorporates the idea of Ripple Net model to give a greater or smaller weight to the hierarchical information near the central node when making use of the information of the ripple set. Then through the disordered encoder mining the user clicks between the items of the association information, the final calculation of the recommendation result. The experimental results show that compared with CKAN, the proposed method increases the values of AUC and F1 by 1.1% and 1.3 % in Last. FM dataset and 0.9% and 1.0% in Book-Crossing dataset, which proves that the proposed method can further improve the performance of the recommended model.