- 加入另一个模型，做模型融合。另一个模型可以用MLP,修改后的loss函数，以及其他一些不平衡数据集的技巧。
- 做特征，扩增训练集;异常值处理(618,11.11)
- 修训练参数
https://zhuanlan.zhihu.com/p/45141799
https://www.kesci.com/home/project/5d282466688d36002c598a18
https://github.com/RHKeng/2018Jdata_RepurchaseDate
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