SVR	Support vector regression
TSVR	Twin support vector regression
PSO	Particle swarm optimization
INGARCH	Integer-valued generalized autoregressive conditional heteroskedasticity
CUSUM	Cumulative sum
INAR	Integer-valued autoregressive
QMLE	Quasi-maximum likelihood estimation
ARMA	Autoregressive and moving average
GARCH	Generalized autoregressive conditional heteroskedasticity
NB	Negative binomial
CMLE	Conditional maximum likelihood estimator
SVM	Support vector machine
MAE	Mean absolute error