Table 3.

Fusion of Multi-Field Retrieval Results on the 2009 with $w_i={\mathit{MAP}}_i^P$ and p = 1,2 . The Same Weighted Parameters were Applied on the 2010 Data-Collection

Datasets	Power	MAP	Bpref	P@5	P@10	P@30	rel_ret
2009	p=1	0.3954	0.4169	0.6880	0.6280	0.5587	1882
	p=2	0.3799	0.4045	0.6880	0.6240	0.5640	1780
2010	p=1	0.3380	0.7496	0.5125	0.4437	0.3250	784
	p=2	0.3326	0.7212	0.5375	0.4937	0.3521	747