?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=GAS%2C+a+Concept+on+Modeling+Species+in+Genetic+Algorithms&rft.creator=Jelasity%2C+Mark&rft.creator=Dombi%2C+Jozsef&rft.subject=Evolution&rft.subject=Artificial+Intelligence&rft.subject=Machine+Learning&rft.description=This+paper+introduces+a+niching+technique+called+GAS+(S+stands+for+species)+which+dynamically+creates+a+subpopulation+structure+(taxonomic+chart)+using+a+radius+function+instead+of+a+single+radius%2C+and+a+%60cooling'+method+similar+to+simulated+annealing.+GAS+offers+a+solution+to+the+niche+radius+problem+with+the+help+of+these+techniques.+A+method+based+on+the+speed+of+species+is+presented+for+determining+the+radius+function.+Speed+functions+are+given+for+both+real+and+binary+domains.+We+also+discuss+the+sphere+packing+problem+on+binary+domains+using+some+tools+of+coding+theory+to+make+it+possible+to+evaluate+the+output+of+the+system.+Finally+two+problems+are+examined+empirically.+The+first+is+a+difficult+test+function+with+unevenly+spread+local+optima.+The+second+is+an+NP-complete+combinatorial+optimization+task%2C+where+a+comparison+is+presented+to+the+traditional+genetic+algorithm.&rft.date=1998&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpostscript&rft.identifier=http%3A%2F%2Fcogprints.org%2F556%2F2%2Fgas.ps&rft.identifier=++Jelasity%2C+Mark+and+Dombi%2C+Jozsef++(1998)+GAS%2C+a+Concept+on+Modeling+Species+in+Genetic+Algorithms.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F556%2F