Traffic Flow Forecasting for Road Tunnel Using PSO-GPR Algorithm with Combined Kernel Function

Table 7

Predicted results of verifying samples By GPR model (veh/h).

Number	Actual value	GPR-SE	GPR-RQ	GPR-CK
	901	878	877	888
	753	735	735	762
	402	375	372	434
	548	523	523	531
	662	634	633	639
	469	438	437	471
	504	491	490	501
	617	627	627	620
	402	403	401	436
	522	533	533	509
	439	424	423	435

Note. GPR-SE represents the GPR model with SEiso kernel function. The meaning of GPR-RQ and GPR-CK is the same as the former.