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

Table 2

Index unitization.

Index	Formula	Unit
Unit length cost	Ontological cost /Single circuit length	10kUSD/km
Unit length tower	Number of towers / Single circuit length	Base/km
Unit tower material consumption	Tower material consumption / Number of towers	t/Base
Unit length conductor consumption	Conductor material consumption / Single circuit length	t/km
Unit foundation steel consumption	Foundation steel consumption / Number of towers	t/Base
Unit foundation concrete consumption	Foundation concrete consumption / Number of towers	m^3/Base
Unit earthwork consumption	Earthwork consumption / Number of towers	m^3/Base