Status a normalized value between - 1 and 1 that represents the ratio of actual vs . goal - 1 is very bad , 1 is very good 状态一个介于- 1和1之间的规范化值,表示实际状态与目标的比率( - 1表示“非常差” , 1表示“非常好” )
Trend a normalized value between - 1 and 1 that represents the trend over time - 1 is getting much worse , 1 is getting much better 走向一个介于- 1和1之间的规范化值,表示一段时间的走向( - 1表示“显著变差” , 1表示“显著变好” )
The first stage explains the questions the model will solve and the goals it pursues . the second stage solves the problems such as how to select dataset , minimize " noise " , normalize values and especially select attributes 问题的定义中给出了要解决的问题和要实现的目标,数据预处理从如何选择样本数据、消除噪音、数据转换、特别是属性的选取方面进行了阐述。