AI	artificial intelligence
AL	active learning
AL-GPR	Gaussian process regression based on active learning
AL-EGPR	ensemble Gaussian process regression based on active learning
ANN	artificial neural network
BIC	Bayesian information criterion
EGPR	ensemble Gaussian process regression with random selection strategy
EM	expectation maximization
FCM	fuzzy C-means
GMM	Gaussian mixture model
GP	Gaussian process
GPR	Gaussian process regression
HC	hierarchical clustering
ML	machine learning
PCR	principal component regression
PFP	penicillin fermentation process
PLS	partial least squares
RMSE	root-mean-square error
RS	random selection
SVM	support vector machine
TP	tracking precision