Attenuation Relationships for the Horizontal Component of Peak Ground Acceleration (PGAH) Using Gene Expression Programing (GEP) and Group Method of Data Handling (GMDH)

Table 1

Operators defined in gene expression programing.

Name	Representation	Weight
Addition	+	4
Subtraction	–	4
Multiplication		4
Division	/	1
Square root	Sqrt	1
Exponential	Exp	1
Natural logarithm	Ln	1
x to the power of 2	X2	1
x to the power of 3	X3	1
Cube root	3Rt	1