arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.07335math.OC
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基于动态子空间的大规模最优化问题的BFGS方法

A Dynamic Subspace Based BFGS Method for Large Scale Optimization Problem

Zheng Li, Shi Shu, Jian-Ping Zhang

摘要:

大规模无约束优化问题是数值优化中一类基本而重要的问题,但至今尚未得到很好的解决。设计算法的主要挑战是需要很少的存储位置或非常便宜的计算,同时保持整体收敛。本文将动态子空间技术与BFGS更新算法相结合,提出了一种求解大规模无约束最优化问题的新方法。实验结果表明,该方法在动态子空间上具有与BFGS相同的收敛速率,而所需存储空间比L-BFGS少。通过构造低维欧几里得空间到自适应子空间的映射,给出了算法的收敛性分析。我们比较我们的混合算法与BFGS和L-BFGS方法。实验结果表明,我们的混合算法提供了一些显着的优势,如并行计算,收敛效率和鲁棒性。

英文摘要:

Large-scale unconstrained optimization is a fundamental and important class of, yet not well-solved problems in numerical optimization. The main challenge in designing an algorithm is to require a few storage locations or very inexpensive computations while preserving global convergence. In this work, we propose a novel approach solving large-scale unconstrained optimization problem by combining the dynamic subspace technique and the BFGS update algorithm. It is clearly demonstrated that our approach has the same rate of convergence in the dynamic subspace as the BFGS and less memory than L-BFGS. Further, we give the convergence analysis by constructing the mapping of low-dimensional Euclidean space to the adaptive subspace. We compare our hybrid algorithm with the BFGS and L-BFGS approaches. Experimental results show that our hybrid algorithm offers several significant advantages such as parallel computing, convergence efficiency, and robustness.

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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