Table 3.
Effects of parameters k and r on LOMBARDE output
| No. of arcs | No. of valid arcs | Ratio | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| r ∖ k | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 | 3 | 5 | 7 | 9 |
| 1 | 24,471 | 24,471 | 24,471 | 24,471 | 428 | 428 | 428 | 428 | 1.8 | 1.8 | 1.8 | 1.8 |
| 1.2 | 15,184 | 14,339 | 13,093 | 12,051 | 385 | 375 | 363 | 369 | 2.5 | 2.6 | 2.8 | 3.1 |
| 1.5 | 12,204 | 10,299 | 8,951 | 8,059 | 369 | 344 | 338 | 333 | 3.0 | 3.3 | 3.8 | 4.1 |
| 2 | 10,294 | 8,423 | 7,144 | 6,453 | 351 | 338 | 325 | 314 | 3.4 | 4.0 | 4.5 | 4.9 |
| 5 | 6,379 | 5,612 | 4,999 | 4,955 | 293 | 300 | 294 | 295 | 4.6 | 5.3 | 5.9 | 6.0 |
| 10 | 5,958 | 5,466 | 4,817 | 4,922 | 280 | 299 | 289 | 295 | 4.7 | 5.5 | 6.0 | 6.0 |
The total number of arcs and the number of validated arcs in the Lombarde output decrease when k or r increase. When the ratio between these two numbers increased, more confident results were obtained; therefore, k=9 and r=10 gave the most confident results