# DIEN

<https://arxiv.org/pdf/1809.03672.pdf>

Deep Interest Evolution Network

[https://coladrill.github.io/2019/02/04/%E6%B7%B1%E5%BA%A6%E5%85%B4%E8%B6%A3%E6%BC%94%E5%8C%96%E7%BD%91%E7%BB%9C-DIEN/](https://coladrill.github.io/2019/02/04/深度兴趣演化网络-DIEN/)

属于：CTR预估

背景：用户并不会实时表达目前的兴趣偏好。因此通过设计模型来**捕获用户的动态变化的兴趣**，是提升CTR预估效果的关键

DIEN模型的主要贡献点在于：

> 1）模型关注电商系统中兴趣演化的过程，并提出了新的网络结果来建模兴趣进化的过程，这个模型能够更精确的表达用户兴趣，同时带来更高的CTR预估准确率。 2）设计了兴趣抽取层，并通过计算一个辅助loss，来提升兴趣表达的准确性。 3）设计了兴趣进化层，来更加准确的表达用户兴趣的动态变化性。


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