Table 1.

Counting rules for the numbers of the variables used in the $F_1$ evaluation measurements for Structural Damage Monitoring Dataset.

	Predicted Class
Reference Class		Normal(N)	Structural Damage(D)	Total
	Normal(N)	$N_n$	$N_d$	$\sum N$
	Structural Damage(D)	$D_n$	$D_d$	$\sum D$
	Total	$\sum n$	$\sum d$
	$\dots \dots$