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Optimization modeling via convex optimization

Research Project

Project/Area Number 20K11696
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60020:Mathematical informatics-related
Research InstitutionKyushu University

Principal Investigator

Waki Hayato  九州大学, マス・フォア・インダストリ研究所, 准教授 (00567597)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords交互射影法 / 収束率 / singularity degree / 凸解析 / 厳密オーダ / 劣収束 / 一次収束 / 半代数的集合 / 半正定値計画問題 / 共正値計画問題 / 面的縮小法 / H-infinity制御 / 凸最適化 / 半正定値計画 / 狭義実行可能性 / モデリング
Outline of Research at the Start

理学や工学などの学術分野において凸最適問題が利用されている. それは, たいていの凸最適化問題が「関数値が下がる方向に進めば大域的最小解に到達できる」という性質を持っているため, 最適化アルゴリズムが設計できるからである. しかしながら, その凸最適化問題が非線形性を有する場合, 最小解を持たない可能性がある. このような場合に数値誤差による摂動の影響で間違えた計算を行なうことが知られている. 本研究課題では, その凸最適化問題が不良設定であることがわかるか, またわかる場合にはどうすれば正しい計算が可能か, という学術的問いのもとで, 幾つかの応用問題を扱い, 最適化理論への貢献を目指す.

Outline of Final Research Achievements

One characterization using singularities defined for the intersection of semi-positive definite cones and affine subspaces is the upper bound on the convergence rate of the alternating projection method. In the present study, we obtained more rigorous evaluation of this upper bound. The convergence rate is evaluated in several settings, and it is found that (i) in some cases the exact convergence rate can be evaluated, and (ii) there are several cases where the convergence rate of the alternating projection method is faster than the upper bound of the convergence rate described by the singularity.

Academic Significance and Societal Importance of the Research Achievements

連続最適化のアルゴリズムの収束率は一般的に, 上界とそれを達成するインスタンスを構成することで評価される. 本研究では, 特定の設定ではあるものの収束率の下界値も与えている. したがって, 他のアルゴリズムに対しても同様の議論をすることが可能であり, その意味でも学術的意義がある. また, 交互射影法のより厳密な収束率の評価や関連するインスタンスを提示したので, 今後の学術的発展も期待できる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (5 results)

All 2024 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] Exact Convergence Rates of Alternating Projections for Nontransversal Intersections2022

    • Author(s)
      Hiroyuki Ochiai, Yoshiyuki Sekiguchi, and Hayato Waki
    • Journal Title

      Japan Journal of Industrial and Applied Mathematics

      Volume: ー Issue: 1 Pages: 57-83

    • DOI

      10.1007/s13160-023-00584-9

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perturbation Analysis of Singular Semidefinite Programs and Its Applications to Control Problems2021

    • Author(s)
      Sekiguchi Yoshiyuki、Waki Hayato
    • Journal Title

      Journal of Optimization Theory and Applications

      Volume: 188 Issue: 1 Pages: 52-72

    • DOI

      10.1007/s10957-020-01780-0

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reduction of SISO H-infinity output feedback control problem2021

    • Author(s)
      Waki Hayato、Ebihara Yoshio、Sebe Noboru
    • Journal Title

      Linear Algebra and its Applications

      Volume: 610 Pages: 321-378

    • DOI

      10.1016/j.laa.2020.09.034

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of the dual problem of linear matrix inequality for H-infinity output feedback control problem via facial reduction2020

    • Author(s)
      Waki Hayato、Sebe Noboru
    • Journal Title

      Mathematics of Control, Signals, and Systems

      Volume: 32 Issue: 3 Pages: 361-384

    • DOI

      10.1007/s00498-020-00261-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Exact convergence rate of alternating projection method for the intersection of an affine subspace and the second-order cone2024

    • Author(s)
      脇 隼人
    • Organizer
      シンポジウム:錐線形計画とその周辺
    • Related Report
      2023 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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