New Insights into the Drill Cutting Characteristics and Fault Distribution in Gas-Containing Coal Seams

Table 3

Network information.

Input layer	Covariates	1	Nonuniformity coefficient
		2	Curvature coefficient
		3	Average particle size
		4	Distribution modulus
		5	Characteristic particle size
		6	F value
		7	Particle strength
		8	Quantity of drill cuttings
	Number of units^a		8
	Rescaling method of covariates		Standardized
Hidden layer	Number of hidden layers		1
	Number of units in hidden layer 1^a		3
	Activation function		Hyperbolic tangent
Output layer	Dependent variables		Hyperbolic tangent fault
	Number of units		2
	Rescaling method of scale dependents		Standardized
	Activation function		Softmax
	Error function		Cross entropy
Model summary	Training	Cross entropy error	0.262
		Percent incorrect predictions	0%
		Stopping rule used	1 consecutive steps with no decrease in error^b
	Testing	Cross entropy error	1.476
		Percent incorrect predictions	16.7%

^aExcluding the basis unit. ^bError computations are based on the testing sample.