13. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Multi-Stack Ensemble
Past
Interactions
Ens CF
Past
Impressions
UBCF
IntInt
UBCF
IntImp
UBCF
ImpImp
UBCF
ImpInt
IBCF
IntInt
IBCF
ImpImp
CBJUIS CBIS
Baseline
Ens
CF+CB
Ens CB
Final
Ensemble
Stack Level 3
14. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Linear Ensemble
weight for algorithm a
rank of item i in algorithm a
decay for algorithm a
15. Politecnico di Milano Team Pumpkin-Pie09-15-2016
red 1.9990
pink 1.9980
yellow 1.9970
blue 1.9960
green 1.9985
orange 1.9970
purple 1.9955
red 1.9940
Algorithm A
Weight 2
Decay 0.001
Algorithm B
Weight 2
Decay 0.0015
Linear Ensemble
1
2
3
4
1
2
3
4
16. Politecnico di Milano Team Pumpkin-Pie09-15-2016
pink 1.9980
yellow 1.9970
blue 1.9960
green 1.9985
orange 1.9970
purple 1.9955
Algorithm A
Weight 2
Decay 0.001
Algorithm B
Weight 2
Decay 0.0015
Linear Ensemble
red 3.9930
17. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Linear Ensemble
Past
Interactions
Ens CF
Past
Impressions
UBCF
IntInt
UBCF
IntImp
UBCF
ImpImp
UBCF
ImpInt
IBCF
IntInt
IBCF
ImpImp
CBJUIS CBIS
Baseline
Ens
CF+CB
Ens CB
Final
Ensemble
18. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Evaluation-Score Ensemble
leaderbord score
# of elements
19. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Evaluation-Score Ensemble
red 7.5660
pink 7.5660
purple 5.5660
orange 5.5660
yellow 9.4575
green 9.4575
blue 6.9575
grey 6.9575
Algorithm A
l_a 200k
n_a 1 Mln
Weight 0.2
Algorithm B
l_b 200k
n_b 800k
Weight 0.25
20. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Evaluation-Score Ensemble
red 7.5660
pink 7.5660
purple 5.5660
orange 5.5660
yellow 9.4575
green 9.4575
blue 6.9575
grey 6.9575
Algorithm A
l_a 200k
n_a 1 Mln
Weight 0.2
Algorithm B
l_b 200k
n_b 800k
Weight 0.25
21. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Evaluation-Score Ensemble
Past
Interactions
Ens CF
Past
Impressions
UBCF
IntInt
UBCF
IntImp
UBCF
ImpImp
UBCF
ImpInt
IBCF
IntInt
IBCF
ImpImp
CBJUIS CBIS
Baseline
Ens
CF+CB
Ens CB
Final
Ensemble
22. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Conclusions
Competition promotes the algorithms that learn
which are the best items among the ones
recommended by the Xing platform
23. Politecnico di Milano Team Pumpkin-Pie09-15-2016
Conclusions
Multi-Stack Ensemble
4th Place
Team Pumpkin-Pie