Research on the wood processing method of helium-assisted laser process

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 4 Variance analysis of kerf width regression model

Variation source	Sum of squares	Freedom	Mean square	F value	P value
Model	0.0253	9	0.0028	187.2000	< 0.0001
\(x_{1}\)	0.0190	1	0.0190	1267.5000	< 0.0001
\(x_{2}\)	0.0028	1	0.0028	187.5000	< 0.0001
\(x_{3}\)	0.0012	1	0.0012	83.3300	< 0.0001
\(x_{1} x_{2}\)	0.0009	1	0.0009	60.0000	0.0001
\(x_{1} x_{3}\)	0.0000	1	0.0000	1.6700	0.2377
\(x_{2} x_{3}\)	0.0000	1	0.0000	1.6700	0.2377
\(x_{1}^{2}\)	4.211 × 10^–6	1	4.211 × 10^–6	0.2807	0.6126
\(x_{2}^{2}\)	0.0001	1	0.0001	4.4900	0.0718
\(x_{3}^{2}\)	0.0011	1	0.0011	76.4200	< 0.0001
Residual	0.0001	7	0.0000
Spurious term	0.0000	3	8.333 × 10^–6	0.4167	0.7510
Error	0.0001	4	0.0000
The sum	0.0254	16