arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2304.04529cs.IRcs.HCcs.LG
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FAN:用于电商推荐中点击率预测的疲劳感知网络

FAN: Fatigue-Aware Network for Click-Through Rate Prediction in E-commerce Recommendation

Alibaba Group(阿里巴巴集团)

Ming Li, Naiyin Liu, Xiaofeng Pan, Yang Huang, Ningning Li, Yingmin Su, Chengjun Mao, Bo Cao

AI总结:

本文提出 FAN 模型,通过 Fourier Transformation 处理未点击时间序列获取疲劳频谱,并结合类别调制、gating network 和辅助任务学习疲劳表示,显著提升了电商推荐中的 CTR 预测效果。

摘要:

由于点击通常包含大量噪声,越来越多的研究致力于对隐式负向用户行为(即未点击)进行建模。然而,现有方法要么依赖显式负向用户行为(例如 dislike),要么简单地将未点击视为负反馈,无法全面学习负向用户兴趣。在这种情况下,用户可能会因为看到太多相似的推荐而产生疲劳。本文提出 Fatigue-Aware Network (FAN),一种直接从未点击中感知用户疲劳的新型 CTR 模型。具体而言,我们首先对从未点击生成的时间序列应用 Fourier Transformation,获得其频谱,该频谱包含关于用户疲劳的综合信息。然后,频谱由目标 item 的类别信息调制,以建模不同类别的疲劳上限和用户耐心不同的偏差。此外,采用 gating network 来建模用户疲劳的置信度,并设计辅助任务来指导用户疲劳的学习,从而获得训练良好的疲劳表示,并将其与用户兴趣结合以进行最终的 CTR 预测。在真实世界数据集上的实验结果验证了 FAN 的优越性,在线 A/B 测试也表明 FAN 显著优于代表性的 CTR 模型。

英文摘要:

Since clicks usually contain heavy noise, increasing research efforts have been devoted to modeling implicit negative user behaviors (i.e., non-clicks). However, they either rely on explicit negative user behaviors (e.g., dislikes) or simply treat non-clicks as negative feedback, failing to learn negative user interests comprehensively. In such situations, users may experience fatigue because of seeing too many similar recommendations. In this paper, we propose Fatigue-Aware Network (FAN), a novel CTR model that directly perceives user fatigue from non-clicks. Specifically, we first apply Fourier Transformation to the time series generated from non-clicks, obtaining its frequency spectrum which contains comprehensive information about user fatigue. Then the frequency spectrum is modulated by category information of the target item to model the bias that both the upper bound of fatigue and users' patience is different for different categories. Moreover, a gating network is adopted to model the confidence of user fatigue and an auxiliary task is designed to guide the learning of user fatigue, so we can obtain a well-learned fatigue representation and combine it with user interests for the final CTR prediction. Experimental results on real-world datasets validate the superiority of FAN and online A/B tests also show FAN outperforms representative CTR models significantly.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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