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arXiv 1709.02679cs.NE
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什么样的体重适合你?基于分解的进化多目标优化中任意Pareto前沿形状的权值自适应

What Weights Work for You? Adapting Weights for Any Pareto Front Shape in Decomposition-based Evolutionary Multi-Objective Optimisation

Miqing Li, Xin Yao

摘要:

基于分解的进化多目标优化(EMO)算法生成的解集的质量很大程度上取决于给定问题的Pareto前沿形状与指定权重分布之间的一致性。一组均匀分布在单纯形中的权重通常会在具有类似单纯形形状的帕累托前沿上产生一组分布良好的解,但可能会在其他帕累托前沿形状上失败。如何在不知道问题的Pareto前沿的情况下确定一组合适的权值是一个悬而未决的问题。在本文中,我们提出了一种方法,以适应在进化过程中的权重(称为AdaW)。AdaW逐步寻求一个合适的权重分配给给定的问题,阐述了五个部分的权重适应-权重生成,权重添加,权重删除,档案维护,和权重更新频率。实验结果表明了该方法的有效性。AdaW适用于具有非常不同形状的Pareto前沿:1)单纯形,2)倒置单纯形,3)高度非线性,4)断开,5)退化,6)不良标度,7)高维。

英文摘要:

The quality of solution sets generated by decomposition-based evolutionary multiobjective optimisation (EMO) algorithms depends heavily on the consistency between a given problem's Pareto front shape and the specified weights' distribution. A set of weights distributed uniformly in a simplex often lead to a set of well-distributed solutions on a Pareto front with a simplex-like shape, but may fail on other Pareto front shapes. It is an open problem on how to specify a set of appropriate weights without the information of the problem's Pareto front beforehand. In this paper, we propose an approach to adapt the weights during the evolutionary process (called AdaW). AdaW progressively seeks a suitable distribution of weights for the given problem by elaborating five parts in the weight adaptation --- weight generation, weight addition, weight deletion, archive maintenance, and weight update frequency. Experimental results have shown the effectiveness of the proposed approach. AdaW works well for Pareto fronts with very different shapes: 1) the simplex-like, 2) the inverted simplex-like, 3) the highly nonlinear, 4) the disconnect, 5) the degenerated, 6) the badly-scaled, and 7) the high-dimensional.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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