Table 1.

PSO-SVR model parameter.

Parameter	Meaning	Reference range	Value
k(x,y)	kernel function	linear	k (x,y)=x·y
C	Penalty factor	[1,108]	3
ϵ	sensitivity	[0,0.2]	1.203564×10-5
Φ	Kernel function coefficient	[0.01,2.0]	0.04545455