陈天奇xgb论文。Tree boosting is a highly eective and widely used machine learning method. In this paper, we describe a scalable endto- end tree boosting system called XGBoost, which is used widely by data scientists to achieve state-of-the-art results on
用Python随机生成学生姓名，三科成绩和班级数据，再插入到PostgreSQL中。
模块用psycopg2 random
import random
import psycopg2
fname=['金','赵','李','陈','许','龙','王','高','张','侯','艾','钱','孙','周','郑']
mname=['玉','明','玲','淑','偑','艳','大','小','风','雨','雪','天','水','奇','鲸','米','晓','泽','恩','葛','玄
