# A LONG-TERM MEMORY APPROACH FOR DYNAMIC MULTIOBJECTIVE EVOLUTIONARY ALGORITHMS

### Alan Díaz Manríquez, Gregorio Toscano-Pulido, Ricardo Landa-Becerra

#### Abstract

A dynamic optimization problem (DOP) may involve two or more functions to be optimized simultaneously, as well as constraints and parameters which can be changed over time, it is essential to have a response approach to react when a change is detected. In the past, several memory-based approaches have been proposed in order to solve single-objective dynamic problems. Such approaches use a long-term memory to store the best known solution found so far before a change in the environment occurs, such that the solutions stored can be used as seeds in subsequent environments. However, when we deal with a Dynamic Multiobjective Problems with a Pareto-based evolutionary approach, it is natural to expect several traded-off solutions at each environment. Hence, it would be prohibitive to incorporate a memory-based methodology into it. In this paper, we propose a viable algorithm to incorporate a long-term memory into evolutionary multiobjective optimization approaches. Results indicate that the proposed approach is competitive with respect to two previously proposed dynamic multiobjective evolutionary approaches.

#### References

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#### Paper Citation

#### in Harvard Style

Díaz Manríquez A., Toscano-Pulido G. and Landa-Becerra R. (2011). **A LONG-TERM MEMORY APPROACH FOR DYNAMIC MULTIOBJECTIVE EVOLUTIONARY ALGORITHMS** . In *Proceedings of the International Conference on Evolutionary Computation Theory and Applications - Volume 1: ECTA, (IJCCI 2011)* ISBN 978-989-8425-83-6, pages 333-337. DOI: 10.5220/0003675403330337

#### in Bibtex Style

@conference{ecta11,

author={Alan Díaz Manríquez and Gregorio Toscano-Pulido and Ricardo Landa-Becerra},

title={A LONG-TERM MEMORY APPROACH FOR DYNAMIC MULTIOBJECTIVE EVOLUTIONARY ALGORITHMS},

booktitle={Proceedings of the International Conference on Evolutionary Computation Theory and Applications - Volume 1: ECTA, (IJCCI 2011)},

year={2011},

pages={333-337},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0003675403330337},

isbn={978-989-8425-83-6},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the International Conference on Evolutionary Computation Theory and Applications - Volume 1: ECTA, (IJCCI 2011)

TI - A LONG-TERM MEMORY APPROACH FOR DYNAMIC MULTIOBJECTIVE EVOLUTIONARY ALGORITHMS

SN - 978-989-8425-83-6

AU - Díaz Manríquez A.

AU - Toscano-Pulido G.

AU - Landa-Becerra R.

PY - 2011

SP - 333

EP - 337

DO - 10.5220/0003675403330337