Variation-Oriented Data Filtering for Improvement in Model Complexity of Air Pollutant Prediction Model

Table 4

Model complexities of the four combinations of SVM models.

	SVM	SVM-DWT	SVM-VF	SVM-GA
TRAIN: year 2003 to 2005, TEST: year 2006
Size of TRAIN	1055	1055	914	1055
Reduction ratio of TRAIN	—	—	13.33%	—
Numbers of SV	1012	6882	881	1012
Training time (mins)	49	291	24	18
TRAIN: year 2004 to 2006, TEST: year 2007
Size of TRAIN	1056	1056	941	1056
Reduction ratio of TRAIN	—	—	10.88%	—
Numbers of SV	991	6759	883	991
Training time (mins)	50	290	24	18
TRAIN: year 2005 to 2007, TEST: year 2008
Size of TRAIN	1043	1043	955	1043
Reduction ratio of TRAIN	—	—	8.46%	—
Numbers of SV	985	6747	912	987
Training time (mins)	48	280	27	20