1) Boosting
2) SSLIM tuning
3) Feature weighting with CBCBF
4) Re-tuning hybrid recommenders
5) Remove Gray Sheep Users from the tuning
6) Build something for gray sheep users, maybe boosting/bagging can work to improve their performances, or some other ML
1) Boosting 2) SSLIM tuning 3) Feature weighting with CBCBF 4) Re-tuning hybrid recommenders 5) Remove Gray Sheep Users from the tuning 6) Build something for gray sheep users, maybe boosting/bagging can work to improve their performances, or some other ML