arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1403.7175math.OCcs.SYeess.SY
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低秩和低阶分解用于局部系统识别

Low-Rank and Low-Order Decompositions for Local System Identification

California Institute of Technology(加州理工学院);Lund University(隆德大学)

Nikolai Matni, Anders Rantzer

AI总结:

本文提出利用低秩和低阶分解方法,解决大规模互联系统中局部动态估计问题,通过核范数最小化分离局部和全局动态。

摘要:

随着分布式系统规模的增加,可扩展算法的需求日益重要。我们论证在系统识别中,任何可扩展算法的核心构建块是能够在大规模互联系统中估计局部动态的能力。我们展示在所谓的"全互联测量"设置中,此任务可通过现有系统识别方法轻松解决。我们还提出一种有前途的启发式方法用于"隐含互联测量"情况,其中需要分离局部和全局动态对局部测量的贡献。受机器学习文献启发,特别是凸方法用于秩最小化和矩阵分解,我们利用局部动态的传递函数是低阶但全秩,而全局动态的传递函数是高阶但低秩的特性,将此分离任务公式化为核范数最小化。

英文摘要:

As distributed systems increase in size, the need for scalable algorithms becomes more and more important. We argue that in the context of system identification, an essential building block of any scalable algorithm is the ability to estimate local dynamics within a large interconnected system. We show that in what we term the "full interconnection measurement" setting, this task is easily solved using existing system identification methods. We also propose a promising heuristic for the "hidden interconnection measurement" case, in which contributions to local measurements from both local and global dynamics need to be separated. Inspired by the machine learning literature, and in particular by convex approaches to rank minimization and matrix decomposition, we exploit the fact that the transfer function of the local dynamics is low-order, but full-rank, while the transfer function of the global dynamics is high-order, but low-rank, to formulate this separation task as a nuclear norm minimization.

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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