Table 5.

Features extracted from sensor response curves.

Feature	Description
A	$C=\frac{R_{\mathit{during}}}{R_0}$
B	$\delta =R_{\mathit{during}}-R_0$
C	$\delta =R_{\mathit{after}}-R_0$
D	Minimum value of resistance reached during the measurement (Rmin)
E	$DR=\frac{{R(t}_3)-{R(t}_2)}{{R(t}_2)-{R(t}_1)}$
F	${LD=R(t}_2)-{R(t}_1)$
G	$y\left[k\right]=\left(1,-,\alpha \right)y\left[k,-,1\right]+\alpha (x\left[k\right]-x\left[k,-,1\right])$
H	R0/Rmin