Evolution of Deep Neural Network Architecture Using Particle Swarm Optimization to Improve the Performance in Determining the Friction Angle of Soil

Table 2

Soil state number explanation.

Soil type	Soil state number	Soil type-state
Clay	1	Very soft clay
	2	Soft clay
	3	Firm clay
	4	Stiff clay
	5	Very stiff clay
	6	Hard clay
Sand	7	Loose sandy
	8	Medium sandy
	9	Dense sandy