kaggle笔记

roc曲线介绍：https://www.cnblogs.com/dlml/p/4403482.html

one-hot encode:

1) Drop Categorical Variables

2) Label Encoding

3) One-Hot Encoding

One-hot encoding generally does not perform well if the categorical variable takes on a large number of values (i.e., you generally won't use it for variables taking more than 15 different values).

ieee反欺诈比赛

1. 利用模型在测试集上表现的差异，来决定用哪些模型进行融合（不同模型在一直的uid和未知uid上效果表现不同