Table 2.

Feature maps 2-tuple $(s,\mathbf{w})$ definition

Map	$s$	$\mathbf{w}$
S-Map	${\mathit{\lambda }}_1-{\mathit{\lambda }}_2$	${\mathbf{e}}_{\mathbf{1}}$
C-Map	${\mathit{\lambda }}_2-{\mathit{\lambda }}_3$	${\mathbf{e}}_{\mathbf{3}}$
J-Map	${\mathit{\lambda }}_3$	Arbitrary