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arXiv 1706.06978stat.MLcs.LG
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深度兴趣网络用于点击率预测

Deep Interest Network for Click-Through Rate Prediction

Alibaba Group(阿里巴巴集团)

Guorui Zhou, Chengru Song, Xiaoqiang Zhu, Ying Fan, Han Zhu, Xiao Ma, Yanghui Yan, Junqi Jin, Han Li, Kun Gai

摘要:

点击率预测是在线广告等行业应用中的一项重要任务。最近提出了基于深度学习的模型,它们遵循类似的嵌入\&MLP范式。在这些方法中,大规模稀疏输入特征首先映射到低维嵌入向量,然后以分组方式转换为固定长度的向量,最后连接在一起送入多层感知器(MLP)学习特征之间的非线性关系。通过这种方式,用户特征被压缩到固定长度的表示向量中,而不管候选广告是什么。固定长度向量的使用将是一个瓶颈,这给Embedding\&MLP方法从丰富的历史行为中有效地捕获用户的不同兴趣带来了困难。在本文中,我们提出了一种新的模型:深度兴趣网络(DIN),它通过设计一个本地激活单元来自适应地学习用户兴趣的表示,从历史行为相对于某个广告来应对这一挑战。该表示向量在不同的广告中有所不同,大大提高了模型的表达能力。此外,我们开发了两种技术:小批量感知正则化和数据自适应激活函数,可以帮助训练具有数亿参数的工业深度网络。在两个公共数据集以及一个拥有超过20亿样本的阿里巴巴真实生产数据集上的实验证明了所提出方法的有效性,与最先进的方法相比,这些方法具有更优越的性能。DIN目前已成功部署在阿里巴巴的在线展示广告系统中,服务于主要的流量。

英文摘要:

Click-through rate prediction is an essential task in industrial applications, such as online advertising. Recently deep learning based models have been proposed, which follow a similar Embedding\&MLP paradigm. In these methods large scale sparse input features are first mapped into low dimensional embedding vectors, and then transformed into fixed-length vectors in a group-wise manner, finally concatenated together to fed into a multilayer perceptron (MLP) to learn the nonlinear relations among features. In this way, user features are compressed into a fixed-length representation vector, in regardless of what candidate ads are. The use of fixed-length vector will be a bottleneck, which brings difficulty for Embedding\&MLP methods to capture user's diverse interests effectively from rich historical behaviors. In this paper, we propose a novel model: Deep Interest Network (DIN) which tackles this challenge by designing a local activation unit to adaptively learn the representation of user interests from historical behaviors with respect to a certain ad. This representation vector varies over different ads, improving the expressive ability of model greatly. Besides, we develop two techniques: mini-batch aware regularization and data adaptive activation function which can help training industrial deep networks with hundreds of millions of parameters. Experiments on two public datasets as well as an Alibaba real production dataset with over 2 billion samples demonstrate the effectiveness of proposed approaches, which achieve superior performance compared with state-of-the-art methods. DIN now has been successfully deployed in the online display advertising system in Alibaba, serving the main traffic.

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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