TY - GEN
T1 - More effective crossover operators for the all-pairs shortest path problem
AU - Doerr, Benjamin
AU - Johannsen, Daniel
AU - Kötzing, Timo
AU - Neumann, Frank
AU - Theile, Madeleine
PY - 2010/11/12
Y1 - 2010/11/12
N2 - The all-pairs problem is the first non-artificial problem for which it was shown that adding crossover can significantly speed up a mutation-only evolutionary algorithm. Recently, the analysis of this algorithm was refined and it was shown to have an expected optimization time of Θ(n 3.25(logn)0.25). In this work, we study two variants of the algorithm. These are based on two central concepts in recombination, repair mechanisms and parent selection. We show that repairing infeasible offspring leads to an improved expected optimization time of O(n3.2(log n) 0.2). Furthermore, we prove that choosing parents that guarantee feasible offspring results in an optimization time of O(n3 log n).
AB - The all-pairs problem is the first non-artificial problem for which it was shown that adding crossover can significantly speed up a mutation-only evolutionary algorithm. Recently, the analysis of this algorithm was refined and it was shown to have an expected optimization time of Θ(n 3.25(logn)0.25). In this work, we study two variants of the algorithm. These are based on two central concepts in recombination, repair mechanisms and parent selection. We show that repairing infeasible offspring leads to an improved expected optimization time of O(n3.2(log n) 0.2). Furthermore, we prove that choosing parents that guarantee feasible offspring results in an optimization time of O(n3 log n).
U2 - 10.1007/978-3-642-15844-5_19
DO - 10.1007/978-3-642-15844-5_19
M3 - Conference contribution
AN - SCOPUS:78149262535
SN - 3642158439
SN - 9783642158438
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 184
EP - 193
BT - Parallel Problem Solving from Nature, PPSN XI - 11th International Conference, Proceedings
T2 - 11th International Conference on Parallel Problem Solving from Nature, PPSN 2010
Y2 - 11 September 2010 through 15 September 2010
ER -