1 article-id
2 122
3 141
4 156
5 188
变成( article原本的顺序归一成0-1之间的大小)
article-id value
122 (3-0)/3=1
141 (3-1)/3=0.67
156 (3-2)/3=0.33
188 (3-3)/3=0
1 article-id
2 122
3 141
4 156
5 188
变成( article原本的顺序归一成0-1之间的大小)
article-id value
122 (3-0)/3=1
141 (3-1)/3=0.67
156 (3-2)/3=0.33
188 (3-3)/3=0