Modelling and Prediction of Particulate Matter, NOx, and Performance of a Diesel Vehicle Engine under Rare Data Using Relevance Vector Machine

Table 4

Results of the RVM models.

Output parameters	MAPE over the training data sets (%)	MAPE over the test data sets (%)	𝑅^2
BSFC	13.83	11.55	0.70
BTE	1.65	4.12	0.99
NOx emission	1.61	7.17	0.99
Mass concentration	11.52	63.14	0.97
Overall average	7.15	21.50