| CASE | 1 | 2 | 3 | 4 |
| 边界条件 | y | y | y | x |
| x0 (m) | 0.5 | 0.5 | 0.375 | 0.5 |
| y1 (m) | 0 | 0.125 | 0.125 | 0 |
| y2 (m) | 1 | 0.875 | 0.875 | 1 |