Open Access
Table 1.
Results of coding of investigated factors.
| Factors and units of measurement | The usual sign | The encoded sign | Interval of varying | Levels of varying | |||||
|---|---|---|---|---|---|---|---|---|---|
| usual | encoded | ||||||||
| Uppers(+1) | Zero (0) | Lower (-1) | upper(+1) | Zero (0) | Lower (-1) | ||||
| Turn pitch of auger shaft(h), mm | X1 | x1 | 2 | 24 | 22 | 20 | +1 | 0 | -1 |
| Area of openings for oil cake withdrawal (s), mm2 | X2 | X2 | 20 | 129 | 109 | 89 | +1 | 0 | -1 |
| Rotation frequency of auger press, (n), min.-1 | X3 | x3 | 30 | 75 | 45 | 15 | +1 | 0 | -1 |
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