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Modeling and Algorithms for Discrete Problems

Research Project

Project/Area Number 20K04978
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25010:Social systems engineering-related
Research InstitutionKyoto University

Principal Investigator

Haraguchi Kazuya  京都大学, 情報学研究科, 准教授 (80453356)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords列挙 / アルゴリズム理論 / 離散最適化 / 列挙アルゴリズム / 列挙問題 / 離散アルゴリズム / データマイニング / バイオインフォマティクス / 離散列挙 / 強化学習 / 数理最適化 / 近似解法 / 局所探索法 / アルゴリズム / モデリング / OR
Outline of Research at the Start

離散問題を解くことはオペレーションズ・リサーチや社会工学をはじめ様々な分野で応用を持つ。離散最適化に関して言えば、IPなどの汎用ソルバの性能は飛躍的に高まってきた。しかし実際のインスタンスは大規模かつ複雑な構造を有することもあり、満足な解を得ることは容易ではない。このような困難に直面した場合、問題の適切なモデリングが肝要である。モデリングとは解きたい問題の部分問題への分解とみなすことができるが、できるだけ広汎な問題群に適用できるようなモデリングおよび効率的な部分問題の解法とは一体どのようなものだろうか。本研究課題ではこの問いに答えを与えるための事例研究を行う。

Outline of Final Research Achievements

It is the enumeration problem that we have made remarkable achievements. Suppose that a set system (i.e., a hypergraph) with an item set is implicitly given by means of an oracle that generates maximal solutions that are subsets of an input subset. We consider a problem that asks to enumerate all maximal solutions with respect to the common item set. We have developed polynomial-delay algorithms for a case when there is no assumption on the set system and a case when the set system is “confluent”. These results are so general that enabled us to find a way to new research problems that include implementation of algorithms that enumerate all maximal connected induced subgraphs with respect to the common itemset and enumeration of subgraphs that satisfy various connectivity conditions (e.g., 2-edge/vertex-connected induced subgraphs in undirected graphs and strongly-connected induced subgraphs in digraphs).

Academic Significance and Societal Importance of the Research Achievements

共通アイテム集合に関して極大解を列挙する問題を、従来まったく取り扱われてこなかった集合システム上に拡張し、多項式遅延列挙が可能であることを示した。この成果は、様々な連結性の条件について、共通アイテム集合に関して極大かつ当該連結条件を満たす誘導部分グラフを列挙することが、多項式遅延で可能なことを意味している。この問題は遺伝生物学において有意なタンパク質構造の発見や、DWAS分析などに応用を持ち、これら個別の問題を解決するための効率の良いアルゴリズムの存在が示唆されている。

Report

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

    (10 results)

All 2023 2022 2021 2020

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Enumeration of Support-Closed Subsets in Confluent Systems2022

    • Author(s)
      Haraguchi Kazuya、Nagamochi Hiroshi
    • Journal Title

      Algorithmica

      Volume: - Issue: 5 Pages: 1279-1315

    • DOI

      10.1007/s00453-022-00927-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Recycling Solutions for Vertex Coloring Heuristics2021

    • Author(s)
      Yasutaka Uchida、Kaito Yajima、Kazuya Haraguchi
    • Journal Title

      Journal of the Operations Research Society of Japan

      Volume: 64 (3)

    • NAID

      130008069708

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] An Inverse QSAR Method Based on a Two-Layered Model and Integer Programming2021

    • Author(s)
      Shi Yu、Zhu Jianshen、Azam Naveed Ahmed、Haraguchi Kazuya、Zhao Liang、Nagamochi Hiroshi、Akutsu Tatsuya
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 6 Pages: 2847-2847

    • DOI

      10.3390/ijms22062847

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Maximum weighted matching with few edge crossings for 2-layered bipartite graph2020

    • Author(s)
      Haraguchi Kazuya、Torii Kotaro、Endo Motomu
    • Journal Title

      Discrete Applied Mathematics

      Volume: 287 Pages: 40-52

    • DOI

      10.1016/j.dam.2020.07.017

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] A Linear Delay Algorithm for Enumeration of 2-Edge/Vertex-connected Induced Subgraphs2023

    • Author(s)
      Takumi Tada and Kazuya Haraguchi
    • Organizer
      Proceedings of 34th International Workshop on Combinatorial Algorithms (IWOCA 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Adjustive Linear Regression and Its Application to the Inverse QSAR2022

    • Author(s)
      Jianshen Zhu, Kazuya Haraguchi, Hiroshi Nagamochi, Tatsuya Akutsu
    • Organizer
      BIOINFORMATICS 2022 (13th International Conference on Bioinformatics, Models, Methods and Algorithms)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Method for Molecular Design Based on Linear Regression and Integer Programming2022

    • Author(s)
      Jianshen Zhu, Naveed Ahmed Azam, Kazuya Haraguchi, Liang Zhao, Hiroshi Nagamochi, Tatsuya Akutsu
    • Organizer
      12th International Conference on Bioscience, Biochemistry and Bioinformatics (ICBBB 2022)
    • Related Report
      2021 Research-status Report
  • [Presentation] Molecular Design Based on Artificial Neural Networks, Integer Programming and Grid Neighbor Search2021

    • Author(s)
      Naveed Ahmed Azam, Jianshen Zhu, Kazuya Haraguchi, Liang Zhao, Hiroshi Nagamochi, Tatsuya Akutsu
    • Organizer
      2021 IEEE International Conference on Bioinformatics and Biomedicine (BIBM)
    • Related Report
      2021 Research-status Report
  • [Presentation] An Inverse QSAR Method Based on Decision Tree and Integer Programming2021

    • Author(s)
      Kouki Tanaka, Jianshen Zhu, Naveed Ahmed Azam, Kazuya Haraguchi, Liang Zhao, Hiroshi Nagamochi, Tatsuya Akutsu
    • Organizer
      Intelligent Computing Theories and Application (ICIC 2021)
    • Related Report
      2021 Research-status Report
  • [Presentation] An Improved Integer Programming Formulation for Inferring Chemical Compounds with Prescribed Topological Structures2021

    • Author(s)
      Jianshen Zhu, Naveed Ahmed Azam, Kazuya Haraguchi, Liang Zhao, Hiroshi Nagamochi, Tatsuya Akutsu
    • Organizer
      IEA/AIE 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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