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o2o's Introduction

赛题回顾

赛题提供用户在2016年1月1日至2016年6月30日之间真实线上线下消费行为,预测用户在2016年7月领取优惠券后15天以内是否核销。评测指标采用AUC,先对每个优惠券单独计算核销预测的AUC值,再对所有优惠券的AUC值求平均作为最终的评价标准。

主要工作

  • 特征工程
    • 采用SW方式对数据集进行特征提取,解决测试集特征缺失问题
    • 题目数据所给特征非常少,对比多种特征提取方法,最终采用人工特征提取效果最优
    • 后续对特征进行缺失值处理、二值化、One-Hot、数据变换、特征选择等
  • 模型参数优化
    • 对比LR、SVM、RF、GBDT、XGBoost等多模型后,最终选择XGBoost
    • 采用CV+GridSearch进行参数调优
  • 模型融合
    • 对比加权Average和两层Stacking两种融合方式,AUC略微提升
    • 最后采用多个过拟合、欠拟合模型(不同模型)融合,得到最优结果
  • 循环调优
    • 根据提交结果,重新筛选特征、调整模型参数、调整融合方式

文档目录

- intruduction.pdf:详细介绍(配有图文)
- code:特征工程、模型
- result:模型及预测结果
- 成绩.bmp:最终提交成绩

项目链接

https://github.com/xy2333/O2O

o2o's People

Contributors

xy2333 avatar

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