Intelligent Prediction of Transmission Line Project Cost Based on Least Squares Support Vector Machine Optimized by Particle Swarm Optimization

Table 3

Index quantification.

Topographic coefficient	Flat	Hill	River network	Mire	Mountain	Alp	Desert	Steep mountain	-
	1	2	3	4	5	6	7	8	-
Geological coefficient	Frozen soil	Ordinary soil	Hard soil	Sand	Puddle	Mud puddle	Drift sand pit	Rock blasting	Rock artificial
	1	2	3	4	5	6	7	8	9
Thickness of ice and wind speed coefficient	Ice-free; ⩽29	Ice-free; 31	Ice-free; 33	Ice-free; 35	Ice-free; ⩾37	Mild ice; 23.5	Mild ice; 25	Mild ice; 27	Mild ice; 29
	1	2	3	4	5	6	7	8	9
	Mild ice; 31	Mild ice; ⩾33	Moderate ice; 23.5	Moderate ice; 25	Moderate ice; 27	Moderate ice; 29	Moderate ice; 31	Moderate ice; ⩾33	-
	10	11	12	13	14	15	16	17	-