Xgboost调参：
https://wuhuhu800.github.io/2018/02/28/XGboost_param_share/
https://blog.csdn.net/hx2017/article/details/78064362
pandas DataFrame中的空值处理：
https://blog.csdn.net/yuanxiang01/article/details/78738812
https://blog.csdn.net/qq_36523839/article/details/80061326
DataFrame 数据合并，连接（merge,join,concat)
https://blog.csdn.net/zutsoft/article/details/51498026
python pandas将值转换为属性／特征
https://blog.csdn.net/yepeng2007fei/article/details/77895764
pandas 根据列的值选取所有行
https://blog.csdn.net/KyrieHe/article/details/80422213
python 划分数据集为训练集和测试集
https://blog.csdn.net/xidianliutingting/article/details/53463033?locationNum=6&fps=1
pandas中Dataframe的查询方法
https://blog.csdn.net/wr339988/article/details/65446138
三种回归模型对朝阳区房价预测的效果对比
https://www.jianshu.com/p/1268c4013681