Table 3. EWSs for systems with relative noise.

System	σ	AC(1)	S	K
LG	yes	no	no	yes
QG	yes	no	no	yes
EG	yes	no	no	no
LNG	no	no	no	yes
TG	no	no	no	yes
LOG	yes	no	no	yes
LD	no	yes	no	no
QD	yes	yes	no	no
ED	no	no	no	no
LND	yes	yes	no	no
TD	yes	yes	no	no
LOD	yes	yes	no	no