Research map / Learning theory and algorithms / Combinatorial and search optimization
Solving the Station Repacking Problem
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Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| add containment cache to the portfolio (ablation) | SATFC 2.0 · UHF test set, 60s | % instances solved: 98% -> 99.6% | Helped |
| start local search from previous feasible assignment (DCCA+) (ablation) | DCCA · UHF test set | % instances solved: 85.4% (vs. lower for random-init DCCA) | Helped |
| add clasp-h1 to DCCA-preSAT/DCCA+ portfolio via Hydra (ablation) | portfolio · UHF test set | % previously unsolved instances solved: +2.8% | Helped |
| add clasp-h2 as fourth portfolio solver (ablation) | portfolio · UHF test set | % previously unsolved instances solved: +0.9% | Helped |
| add graph decomposition (smaller largest component) (ablation) | SAT repacking · UHF instances | largest component size (stations, median): 629 -> 458 | Helped |
| run clasp in parallel with DCCA (Hydra round) (ablation) | DCCA · validation set | % instances solved: +4% | Helped |
| SAT encoding instead of MIP encoding | station repacking · UHF test set, 60s | % instances solved | Helped |
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