Table 4.2. Example 1 results for the three partial derivatives of the solution at T = 10.
| Δ t | true ∂1q | est. ∂1q | Error | IIIab | IIb | Estimate | Error Estimate |
est. ∂1q+Est. true ∂1q |
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| 0.2 | –1.35E – 02 | 6.30E – 02 | –7.66E – 02 | 9.59E – 03 | 2.20E – 05 | 9.61E – 03 | –0.126 | –5.36 |
| 0.1 | –1.35E – 02 | 5.75E – 02 | –7.10E – 02 | –1.07E – 01 | –5.60E – 06 | –1.07E – 01 | 1.51 | 3.66 |
| 0.05 | –1.35E – 02 | 9.58E – 03 | –2.31E – 02 | –2.36E – 02 | 3.40E – 06 | –2.36E – 02 | 1.02 | 1.04 |
| 0.025 | –1.35E – 02 | –9.20E – 03 | –4.39E – 03 | –3.91E – 03 | –9.80E – 06 | –3.92E – 03 | 0.893 | 0.965 |
|
| ||||||||
| Δ t | true ∂2q | est. ∂2q | Error | IIIab | IIb | Estimate | Error Estimate |
est. ∂2q+Est. true ∂2q |
|
| ||||||||
| 0.2 | 1.40E + 01 | –3.39E – 01 | 1.44E + 01 | 1.26E + 01 | 2.07E – 04 | 1.26E + 01 | 0.876 | 0.873 |
| 0.1 | 1.40E + 01 | –6.37E – 01 | 1.47E + 01 | 5.82E + 00 | –3.24E – 04 | 5.82E + 00 | 0.397 | 0.370 |
| 0.05 | 1.40E + 01 | 7.68E + 00 | 6.34E + 00 | 4.85E + 00 | –2.87E – 04 | 4.85E + 00 | 0.765 | 0.894 |
| 0.0250 | 1.40E + 01 | 1.30E + 01 | 9.91E – 01 | 7.88E – 01 | –2.53E – 04 | 7.87E – 01 | 0.794 | 0.985 |
|
| ||||||||
| Δ t | true ∂3q | est. ∂3q | Error | IIIab | IIb | Estimate | Error Estimate |
est. ∂3q+Est. true ∂3q |
|
| ||||||||
| 0.2 | 4.51E – 01 | 4.63E – 01 | –1.29E – 02 | –1.14E – 02 | 2.18E – 05 | –1.14E – 02 | 0.882 | 1.02 |
| 0.1 | 4.51E – 01 | 4.64E – 01 | –1.32E – 02 | –5.13E – 03 | –9.29E – 06 | –5.14E – 03 | 0.388 | 1.02 |
| 0.05 | 4.51E – 01 | 4.56E – 01 | –5.73E – 03 | –4.37E – 03 | –2.20E – 06 | –4.37E – 03 | 0.763 | 1.00 |
| 0.025 | 4.51E – 01 | 4.51E – 01 | –8.98E – 04 | –7.10E – 04 | –8.74E – 06 | –7.19E – 04 | 0.801 | 1.00 |
|
| ||||||||
| Δ t | true ∂4q | est. ∂4q | Error | IIIab | IIb | Estimate | Error Estimate |
est. ∂4q+Est. true ∂4q |
|
| ||||||||
| 0.2 | –9.52E – 01 | –1.16E – 01 | –8.37E – 01 | 1.11E – 01 | 2.18E – 04 | 1.11E – 01 | –0.133 | 1.36 |
| 0.1 | –9.52E – 01 | –1.78E – 01 | –7.75E – 01 | –1.17E + 00 | –3.28E – 04 | –1.18E + 00 | 1.52 | 0.458 |
| 0.05 | –9.52E – 01 | –7.01E – 01 | –2.51E – 01 | –2.58E – 01 | –2.83E – 04 | –2.58E – 01 | 1.03 | 1.01 |
| 0.025 | –9.52E – 01 | –9.04E – 01 | –4.81E – 02 | –4.27E – 02 | –2.52E – 04 | –4.29E – 02 | 0.892 | 0.995 |