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Table 7

Statistical parameters of the SVM models for the relative energy dissipation ratio

Condition	SVM models	Optimal parameters			Performance criteria
					Train			Test
		C	ɛ	γ	R	DC	RMSE	R	DC	RMSE
Rectangular channel with strip elements	RD(I)	6.0	0.10	4	0.953	0.944	0.031	0.952	0.925	0.058
	RD(II)	6.0	0.10	3	0.946	0.942	0.034	0.948	0.916	0.063
	RD(III)	6.0	0.10	3	0.939	0.935	0.038	0.946	0.903	0.066
Rectangular channel with staggered elements	RD(I)	10	0.01	4	0.925	0.848	0.065	0.922	0.836	0.077
	RD(II)	10	0.10	6	0.915	0.841	0.068	0.911	0.828	0.079
	RD(III)	10	0.10	6	0.910	0.833	0.071	0.903	0.821	0.084
Trapezoidal channel with strip elements	RD(I)	8.0	0.10	2	0.915	0.838	0.066	0.912	0.827	0.079
	RD(II)	8.0	0.10	2	0.911	0.821	0.069	0.908	0.819	0.081
	RD(III)	6.0	0.10	2	0.909	0.814	0.074	0.905	0.811	0.085
Expanding channel with central sill	RD(I)	10	0.10	4	0.975	0.952	0.028	0.961	0.941	0.031
	RD(III)	10	0.10	4	0.968	0.942	0.031	0.942	0.936	0.035
	RD(IV)	10	0.10	4	0.966	0.944	0.030	0.939	0.934	0.037

Condition	SVM models	Optimal parameters			Performance criteria
					Train			Test
		C	ɛ	γ	R	DC	RMSE	R	DC	RMSE
Rectangular channel with strip elements	RD(I)	6.0	0.10	4	0.953	0.944	0.031	0.952	0.925	0.058
	RD(II)	6.0	0.10	3	0.946	0.942	0.034	0.948	0.916	0.063
	RD(III)	6.0	0.10	3	0.939	0.935	0.038	0.946	0.903	0.066
Rectangular channel with staggered elements	RD(I)	10	0.01	4	0.925	0.848	0.065	0.922	0.836	0.077
	RD(II)	10	0.10	6	0.915	0.841	0.068	0.911	0.828	0.079
	RD(III)	10	0.10	6	0.910	0.833	0.071	0.903	0.821	0.084
Trapezoidal channel with strip elements	RD(I)	8.0	0.10	2	0.915	0.838	0.066	0.912	0.827	0.079
	RD(II)	8.0	0.10	2	0.911	0.821	0.069	0.908	0.819	0.081
	RD(III)	6.0	0.10	2	0.909	0.814	0.074	0.905	0.811	0.085
Expanding channel with central sill	RD(I)	10	0.10	4	0.975	0.952	0.028	0.961	0.941	0.031
	RD(III)	10	0.10	4	0.968	0.942	0.031	0.942	0.936	0.035
	RD(IV)	10	0.10	4	0.966	0.944	0.030	0.939	0.934	0.037