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

Table 1

Influencing indexes of transmission line project cost.

Index type	Influencing indexes	Number
Natural indexes	Topography	X1
	Geology	X2
	Thickness of ice and wind speed	X3
Technical indexes	Single circuit length	X4
	Conductor cross-section	X5
	Conductor consumption	X6
	Tension ratio	X7
	Number of towers	X8
	Tower material consumption	X9
	Earthwork consumption	X10
	Foundation concrete consumption	X11
	Foundation steel consumption	X12
Economic indexes	Price of conductor	X13
	Price of tower material	X14
	Price of foundation steel	X15