The performance of optimization algorithms is sensitive to both the optimization problem's
numerical characteristics and the termination criteria of the algorithm. Given these considerations
two tuning algorithms named tMOPSO and MOTA are proposed to assist optimization
practitioners to nd algorithm settings which are approximate for the problem at hand. For
a speci ed problem tMOPSO aims to determine multiple groups of control parameter values,
each of which results in optimal performance at a di erent objective function evaluation budget.
To achieve this, the control parameter tuning problem is formulated as a multi-objective
optimization problem. Furthermore, tMOPSO uses a noise-handling strategy and control parameter
value assessment procedure, which are specialized for tuning stochastic optimization
algorithms. The principles upon which tMOPSO were designed are expanded into the context
of many objective optimization, to create the MOTA tuning algorithm. MOTA tunes an optimization
algorithm to multiple problems over a range of objective function evaluation budgets.
To optimize the resulting many objective tuning problem, MOTA makes use of bi-objective
decomposition. The last section of work entails an application of the tMOPSO and MOTA
algorithms to benchmark optimization algorithms according to their tunability. Benchmarking via tunability is shown to be an effective approach for comparing optimization algorithms, where
the various control parameter choices available to an optimization practitioner are included into
the benchmarking process. / Thesis (PhD)--University of Pretoria, 2014 / gm2015 / Mechanical and Aeronautical Engineering / PhD / Unrestricted
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:up/oai:repository.up.ac.za:2263/43554 |
| Date | January 2014 |
| Creators | Dymond, Antoine Smith Dryden |
| Contributors | Heyns, P.S. (Philippus Stephanus), antoine.dymond@gmail.com, Kok, Schalk |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | © 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
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