Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Experimental scheme and results
| Factors | Voltage A [V] | Time B [s] | Empty column | Density C [ends/10cm] | Temperature [°C] |
|---|---|---|---|---|---|
| Test number | 1 | 2 | 3 | 4 | |
| 1 | 1 | 1 | 1 | 1 | 4.7 |
| 2 | 1 | 2 | 2 | 2 | 6.9 |
| 3 | 1 | 3 | 3 | 3 | 6.4 |
| 4 | 2 | 1 | 2 | 3 | 5.4 |
| 5 | 2 | 2 | 3 | 1 | 6.2 |
| 6 | 2 | 3 | 1 | 2 | 7.6 |
| 7 | 3 | 1 | 3 | 2 | 6.8 |
| 8 | 3 | 2 | 1 | 3 | 7.5 |
| 9 | 3 | 3 | 2 | 1 | 7.1 |
Three-factor level table
| Level Factors | 1 | 2 | 3 |
|---|---|---|---|
| Voltage [V] | 10 | 12 | 14 |
| Time [s] | 240 | 360 | 480 |
| Density [ends/10cm] | 4 | 5 | 6 |
Analysis of influential factors
| Category | Voltage A | Time B | Empty column | Density C |
|---|---|---|---|---|
| K1j | 6.000 | 5.633 | 6.600 | 6.000 |
| K2j | 6.400 | 6.867 | 6.467 | 7.100 |
| K3j | 7.133 | 7.033 | 6.467 | 6.433 |
| K1j(一) | 2.000 | 1.877 | 2.200 | 2.000 |
| K2j(二) | 2.133 | 2.289 | 2.156 | 2.367 |
| K3j(三) | 2.377 | 2.344 | 2.156 | 2.144 |
| Range Rj | 0.337 | 0.467 | 0.044 | 0.367 |
| Main factors→ minor factors | BAC | |||
| Optimal scheme | A3 B3 C2 | |||
Analysis of variance
| Source of variance | Sum of squared deviation Sj | Degrees of freedom fj | Mean square
| Fj value | Significance |
|---|---|---|---|---|---|
| A Voltage | 1.982222 | 2 | 0.991111 | 55.7493 | Significant |
| B Time | 3.508889 | 2 | 1.754444 | 9.868624 | Significant |
| C Density | 1.842222 | 2 | 0.921111 | 5.181185 | Significant |
| e Error | 0.035556 | 2 | 0.017778 |