论文标题

单目标优化景观的线性基质分解嵌入

Linear Matrix Factorization Embeddings for Single-objective Optimization Landscapes

论文作者

Eftimov, Tome, Popovski, Gorjan, Renau, Quentin, Korosec, Peter, Doerr, Carola

论文摘要

自动化算法的选择和配置已显示出许多经典优化问题的有希望的性能,包括满意度,AI计划和TSP。这些技术通常依靠一组衡量当前问题实例的某些特征的功能。在黑盒优化的上下文中,这些功能必须从$(x,f(x))$样本的集合中得出。文献中已经提出了许多不同的特征,例如测量手头实例的模态,可分离性或坚固性。但是,一些常用的功能高度相关。尽管最新的机器学习技术可以常规过滤这种相关性,但它们阻碍了派生算法设计技术的解释。 因此,我们在这项工作中建议通过表示学习预处理(原始)景观特征。更确切地说,我们表明,通过矩阵分解的线性维度降低显着有助于更好地检测不同问题实例之间的相关性 - 成功的自动化算法设计的关键先决条件。

Automated per-instance algorithm selection and configuration have shown promising performances for a number of classic optimization problems, including satisfiability, AI planning, and TSP. The techniques often rely on a set of features that measure some characteristics of the problem instance at hand. In the context of black-box optimization, these features have to be derived from a set of $(x,f(x))$ samples. A number of different features have been proposed in the literature, measuring, for example, the modality, the separability, or the ruggedness of the instance at hand. Several of the commonly used features, however, are highly correlated. While state-of-the-art machine learning techniques can routinely filter such correlations, they hinder explainability of the derived algorithm design techniques. We therefore propose in this work to pre-process the measured (raw) landscape features through representation learning. More precisely, we show that a linear dimensionality reduction via matrix factorization significantly contributes towards a better detection of correlation between different problem instances -- a key prerequisite for successful automated algorithm design.

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