Weighted Domain Transfer Extreme Learning Machine and Its Online Version for Gas Sensor Drift Compensation in E-Nose Systems

Table 1

Data distribution [18].

Batch number	Months	Number of samples
		Ethanol	Ethylene	Ammonia	Acetaldehyde	Acetone	Toluene
	1, 2	83	30	70	98	90	74
	3, 4, 8, 9, 10	100	109	532	334	164	5
	11, 12, 13	216	240	275	490	365	0
	14, 15	12	30	12	43	64	0
	16	20	46	63	40	28	0
	17, 18, 19, 20	110	29	606	574	514	467
	21	360	744	630	662	649	568
	22, 23	40	33	143	30	30	18
	24, 30	100	75	78	55	61	101
	36	600	600	600	600	600	600