Table 4.

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

Datasets	Power	MAP	Bpref	P@5	P@10	P@30	rel_ret
2010	p=1	0.3423	0.7498	0.5250	0.4312	0.3208	785
	p=2	0.3333	0.7269	0.5250	0.4812	0.3417	757
2009	p=1	0.3943	0.4163	0.6880	0.6240	0.5560	1877
	p=2	0.3829	0.4062	0.6880	0.6280	0.5680	1730