Predicting Ink Transfer Rate of 3D Additive Printing Using EGBO Optimized Least Squares Support Vector Machine Model

Table 1

Statistical description of variables.

Variables	Notation	Max	Min	Mean	Std	Kurt	Skew
Printing pressure (N)	X1	5000	2600	3913.73	586.79	−0.55	−0.67
Squeegee angle (°)	X2	20	5	10.49	6.66	−1.46	0.63
Squeegee speed (mm/s)	X3	900	400	658.82	159.26	−0.60	−0.47
Ink viscosity (cP)	X4	180000	110000	141568.63	25581.29	−1.52	0.25
ITR	Y	0.44	0.21	0.35	0.05	−0.41	−0.41