| Learning optimally diverse rankings over large document collections Recent countries visiting this post |  |
 | 9 | United States |
 | 1 | Germany |
 | 1 | China |
 | 1 | Russian Federation |
| Learning optimally diverse rankings over large document collections Recent countries visiting this post | |
| 9 | United States |
| 1 | Germany |
| 1 | China |
| 1 | Russian Federation |