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arXiv 2106.09153cs.NE
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为选择而选择:学习在进化搜索中平衡适应性和多样化压力

Selecting for Selection: Learning To Balance Adaptive and Diversifying Pressures in Evolutionary Search

Kevin Frans, L. B. Soros, Olaf Witkowski

摘要:

受自然进化的启发,进化搜索算法已被证明是非常有能力的,因为它们具有通过不同种群进行辐射式探索和收敛到适应压力的双重能力。这种行为的很大一部分来自进化算法的选择功能,这是决定哪些个体存活到下一代的度量。在欺骗性或难以搜索的适应度景观中,贪婪选择往往会失败,因此选择函数在梯度利用适应和探索性多样化之间取得正确的平衡至关重要。本文介绍了Sel4Sel,或选择选择,一种算法,通过元进化循环搜索高性能的基于神经网络的选择功能。在三个不同的比特串域上的结果表明,Sel4Sel网络始终匹配或超过基于适应度的选择和明确旨在鼓励多样性的基准的性能。对最强Sel4Sel网络的分析揭示了一种普遍的趋势,即在早期倾向于高度新颖的个体,随着欺骗性的局部最优被绕过,逐渐转向基于适应度的选择。

英文摘要:

Inspired by natural evolution, evolutionary search algorithms have proven remarkably capable due to their dual abilities to radiantly explore through diverse populations and to converge to adaptive pressures. A large part of this behavior comes from the selection function of an evolutionary algorithm, which is a metric for deciding which individuals survive to the next generation. In deceptive or hard-to-search fitness landscapes, greedy selection often fails, thus it is critical that selection functions strike the correct balance between gradient-exploiting adaptation and exploratory diversification. This paper introduces Sel4Sel, or Selecting for Selection, an algorithm that searches for high-performing neural-network-based selection functions through a meta-evolutionary loop. Results on three distinct bitstring domains indicate that Sel4Sel networks consistently match or exceed the performance of both fitness-based selection and benchmarks explicitly designed to encourage diversity. Analysis of the strongest Sel4Sel networks reveals a general tendency to favor highly novel individuals early on, with a gradual shift towards fitness-based selection as deceptive local optima are bypassed.

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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