arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.05482cs.IR
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用于CTR预测的深度位置交互网络

Deep Position-wise Interaction Network for CTR Prediction

Jianqiang Huang, Ke Hu, Qingtao Tang, Mingjian Chen, Yi Qi, Jia Cheng, Jun Lei

摘要:

点击率(CTR)预测在在线广告和推荐系统中起着重要的作用。在实践中,CTR模型的训练取决于点击数据,该点击数据本质上偏向于较高位置,因为较高位置本质上具有较高CTR。现有的方法,如固定位置推理的实际位置训练和无位置推理的逆倾向加权训练,在一定程度上缓解了偏差问题。然而,在训练和推理之间对位置信息的不同处理将不可避免地导致不一致和次优的在线性能。同时,这些方法的基本假设,即,点击概率是检查概率和相关概率的乘积,过于简化,不足以模拟位置与其他信息之间的丰富交互。在本文中,我们提出了一个深度位置明智的互动网络(DPIN),有效地结合所有候选项目和位置估计CTR在每个位置,实现离线和在线之间的一致性,以及建模的深度非线性之间的互动位置,用户,上下文和项目的限制下,服务性能。根据我们对CTR预测中位置偏差的新处理,我们提出了一种新的评价指标PAUC(position-wise AUC),适用于测量给定位置的排名质量。通过在真实世界数据集上的大量实验,我们经验性地证明了我们的方法在解决位置偏差问题上是有效的和高效的。我们还在生产中部署了我们的方法,并在严格的A/B测试中观察到了高度优化的基线在统计上的显著改善。

英文摘要:

Click-through rate (CTR) prediction plays an important role in online advertising and recommender systems. In practice, the training of CTR models depends on click data which is intrinsically biased towards higher positions since higher position has higher CTR by nature. Existing methods such as actual position training with fixed position inference and inverse propensity weighted training with no position inference alleviate the bias problem to some extend. However, the different treatment of position information between training and inference will inevitably lead to inconsistency and sub-optimal online performance. Meanwhile, the basic assumption of these methods, i.e., the click probability is the product of examination probability and relevance probability, is oversimplified and insufficient to model the rich interaction between position and other information. In this paper, we propose a Deep Position-wise Interaction Network (DPIN) to efficiently combine all candidate items and positions for estimating CTR at each position, achieving consistency between offline and online as well as modeling the deep non-linear interaction among position, user, context and item under the limit of serving performance. Following our new treatment to the position bias in CTR prediction, we propose a new evaluation metrics named PAUC (position-wise AUC) that is suitable for measuring the ranking quality at a given position. Through extensive experiments on a real world dataset, we show empirically that our method is both effective and efficient in solving position bias problem. We have also deployed our method in production and observed statistically significant improvement over a highly optimized baseline in a rigorous A/B test.

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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