A Novel Feature Selection Strategy for Enhanced Biomedical Event Extraction Using the Turku System

Table 1

Examples for AEEi algorithm.

(a) AEEi result for Ranking Result A

Rank	Result A	𝑂𝑖𝑗			AEE1 𝑐𝑖𝑗			AEE2 𝑐𝑖𝑗
		𝑖=1	𝑖=2		𝑖=1	𝑖=2		𝑖=1	𝑖=2
𝑗=1	1&2	1	1		1/1	1/1		1/2	1/2
𝑗=2	1	2	1		2/2	1/2		2/3	1/3
𝑗=3	2	2	2		2/3	2/3		2/4	2/4
				AEE1(𝑖)	2.667	2.167	AEE2(𝑖)	1.667	1.333

(b) AEEi result for Ranking Result B

Rank	Result B	𝑂𝑖𝑗			AEE1 𝑐𝑖𝑗			AEE2 𝑐𝑖𝑗
		𝑖=1	𝑖=2		𝑖=1	𝑖=2		𝑖=1	𝑖=2
𝑗=1	1	1	0		1/1	0/1		1/1	0/1
𝑗=2	1&2	2	1		2/2	1/2		2/3	1/3
𝑗=3	2	2	2		2/3	2/3		2/4	2/4
				AEE1(𝑖)	2.667	1.167	AEE2(𝑖)	2.167	0.833