A Hybrid Semi-Supervised Anomaly Detection Model for High-Dimensional Data

Table 2

Average AUC and corresponding standard deviation of the different methods. The first class listed in the bracket indicates the normal class. Results were calculated from 50 iterations.

		SVDD	OCSVM	aK-LPE	OCSVM-FA	Our model
OAR; (Stand versus others)	AUC	0.94; ±0.01	0.95; ±0.01	0.96; ±0.00	0.98; ±0.02	0.99; ±0.00
OAR; (Sit versus others)	AUC	0.88; ±0.01	0.87; ±0.02	0.90; ±0.04	0.90; ±0.01	0.95; ±0.01
OAR; (Lie versus others)	AUC	0.95; ±0.01	0.95; ±0.01	0.97; ±0.00	0.98; ±0.01	0.99; ±0.00
GAS; (Ethanol versus others)	AUC	0.92; ±0.02	0.92; ±0.02	0.94; ±0.01	0.93; ±0.02	0.97; ±0.01
GAS; (Ethylene versus others)	AUC	0.91; ±0.04	0.91; ±0.04	0.92; ±0.03	0.94; ±0.02	0.98; ±0.01
GAS; (Ammonia versus others)	AUC	0.92; ±0.02	0.93; ±0.02	0.95; ±0.01	0.96; ±0.01	0.99; ±0.00
GAS; (Acetone versus others)	AUC	0.81; ±0.03	0.77; ±0.04	0.80; ±0.03	0.80; ±0.03	0.92; ±0.01
MPID; (background versus signal)	AUC	0.70; ±0.04	0.77; ±0.03	0.75; ±0.03	0.79; ±0.03	0.82; ±0.01
MPID; (signal versus background)	AUC	0.66; ±0.09	0.72; ±0.11	0.73; ±0.03	0.70; ±0.03	0.76; ±0.01
KDD 2008; (benign versus malignant)	AUC	0.50; ±0.03	0.51; ±0.03	0.34; ±0.01	0.50; ±0.01	0.52; ±0.01
Rank		4.3	3.90	3.10	2.65	1.05