Symbol	Explanation	SI Unit
ANFIS	Adaptive neuro-fuzzy inference system
PSO	Particle swarm optimization
R	Correlation coefficient
RMSE	Root mean squared error
MAE	Mean absolute error
IA	Index of agreement
CV	Coefficient of variation	%
nrule	Number of fuzzy rules
npop	PSO population size
wini	PSO initial weight
c1	PSO cognition learning rate
c2	PSO social learning rate
fv	PSO velocity limits