Semiadaptive Fault Diagnosis via Variational Bayesian Mixture Factor Analysis with Application to Wastewater Treatment

Table 2

Selected sensors for process monitoring.

Statistics\methods	PCA	FA	VBPCA	VBMFA
	26/444	24/444	16/444	0/444
SPE	21/444	15/444	13/444	1/444
Parameters	PC: 4	Factors: 4	PC: 3	Maximum factors: 14; Local factors: 2, 3, 1