Table 6.
Layouts of 5 carousels selected for the ContentWise Impressions dataset selected according to different strategies and optimizing both the single list NDCG and the proposed two-dimensional N2DCG.
|
Optimized metric |
Exhaustive selection and ranking |
Exhaustive selection default ranking |
Incremental greedy |
Individual greedy |
|---|---|---|---|---|
| NDCG | SLIM ElasticNet | SLIM ElasticNet | SLIM ElasticNet | SLIM ElasticNet |
| ItemKNN CF | ItemKNN CF | ItemKNN CF | ItemKNN CF | |
| UserKNN CF | RP3β | RP3β | UserKNN CF | |
| RP3β | UserKNN CF | P3α | RP3β | |
| FunkSVD | FunkSVD | UserKNN CF | FunkSVD | |
| N2DCG | ItemKNN CF | ItemKNN CF | SLIMElasticNet | - |
| P3α | RP3β | ItemKNN CF | - | |
| RP3β | P3α | UserKNN CF | - | |
| PureSVD | PureSVD | RP3β | - | |
| FunkSVD | FunkSVD | FunkSVD | - |
The Individual Greedy layout for N2DCG is missing since that method is based on the traditional single list evaluation.