说明：  训练机器学习模型,用于在线检测服务器未来7天 内是否会发生内存故障;在被检测出来的未来7天会发生故障的 服务器的基础之上,预测每台服务器的距离发生故 障的时间
(Training machine learning model for online detection of whether the server will have memory failure in the next 7 days; On the basis of the detected servers that will fail in the next 7 days, predict the distance between each server and the time of failure)