基于注意力增强的热点感知新闻推荐模型
HAN:Hotspot-Aware Attention Enhanced News Recommendation

丁琪 ^1,2 田萱 ^1,2 ^* 孙国栋 ^1,2

文摘	完全个性化的新闻推荐工作通常只基于用户兴趣,可能会导致推荐结果与点击过的内容过于相似甚至重复.事实上即使一些热点新闻并不完全符合用户兴趣,用户也可能希望点击类似的新闻.目前基于热点的新闻推荐方法不能很好挖掘潜在新闻的热点特征、灵活平衡用户兴趣和热点特征.本文提出一种新颖的注意力增强的热点感知新闻推荐模型(Hotspot-aware Attention enhaNced model,HAN),充分利用注意力网络和自注意力网络等深度神经网络的优势,在个性化推荐中将个性化兴趣与新闻热点性进行更好平衡与利用.该模型包括新闻编码器、热点特征提取器、用户兴趣提取器和点击预测器四个组件.提出一个热点特征提取器,使用注意力网络动态聚合热点新闻学习热点表示以更好挖掘热点特征;提出一个新颖的点击预测器来灵活融合热点特征、用户兴趣和候选新闻,以提升候选新闻的点击预测准确率.真实数据集上的实验表明HAN模型在AUC(Area Under the Curve of ROC)和F1两项指标上分别提升了7.51%和8.63%,且能够有效缓解用户冷启动问题.
其他语种文摘	Personalized news recommendation is usually based on users' interests only,which may cause the recommendation results to be too similar with or even repeat the content that has been clicked.In fact,even if some hot news may not meet the user's interests,users may also want to click on similar news.At present,hotspot-based approaches usually can not well mine the potential news hotspot features and flexibly balance the user interest and hotspot features.In this paper,a hotspot-aware attention enhanced model (HAN) for news recommendation is proposed,which makes full use of the advantages of deep neural networks such as attention networks and self-attention networks to better balance and utilize personalized interests and news hotspot in recommendation algorithm.HAN includes four components:news encoder,hotspot feature extractor,user interests extractor and click predictor.In order to effectively mine hotspot features,a hotspot feature extractor is proposed,which uses an attention network to dynamically aggregate hot news and learn hotspot feature representation;in order to improve the accuracy of predicting the click probability of candidate news,a click predictor is proposed to flexibly fuse hotspot features,user interests feature and candidate news representation.Experiments on a real-world dataset show that the area under the curve of ROC (AUC) and F1 increase by 7.51% and 8.63% respectively.At the same time,the model also helps to alleviate the cold-start problem of users.
来源	电子学报 ,2023,51(1):93-104 【核心库】
DOI	10.12263/DZXB.20210570
关键词	新闻推荐 ; 热点感知 ; 自注意力网络 ; 注意力网络 ; 卷积神经网络
地址	1. 北京林业大学信息学院, 北京, 100083 2. 国家林业草原林业智能信息处理工程技术研究中心, 国家林业草原林业智能信息处理工程技术研究中心, 北京, 100083
语种	中文
文献类型	研究性论文
ISSN	0372-2112
学科	自动化技术、计算机技术
基金	国家重点研发计划
文献收藏号	CSCD:7419784