Table 2 Factors and levels for the response surface experiment.
From: Analysis of energy loss in the helical hedge flow channel of fruit tree root emitter
Factors | α | b (mm) | n | |
|---|---|---|---|---|
Levels | − 1 | 30° | 1 | 10 |
0 | 45° | 1.5 | 25 | |
1 | 60° | 2 | 40 | |
From: Analysis of energy loss in the helical hedge flow channel of fruit tree root emitter
Factors | α | b (mm) | n | |
|---|---|---|---|---|
Levels | − 1 | 30° | 1 | 10 |
0 | 45° | 1.5 | 25 | |
1 | 60° | 2 | 40 | |
