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2016 Fiscal Year Annual Research Report

文字列情報処理の新展開-文字列組み合わせ論と高度データ構造技術の融合-

Research Project

Project/Area Number 26280003
Research InstitutionKyushu University

Principal Investigator

稲永 俊介  九州大学, システム情報科学研究科(研究院, 准教授 (60448404)

Co-Investigator(Kenkyū-buntansha) 坂内 英夫  九州大学, システム情報科学研究科(研究院, 准教授 (20323644)
田部井 靖生  東京工業大学, その他部局等, 研究員 (20589824)
Project Period (FY) 2014-04-01 – 2018-03-31
Keywordsアルゴリズム / 文字列組み合わせ論 / データ構造
Outline of Annual Research Achievements

本研究課題の目的は,大規模文字列データを対象とした効率的なデータ構造とアルゴリズムの開発である.本年度は,以下に示す (A)-(C) の重要研究テーマについて,主に以下の研究成果を達成した.
(A) テキスト圧縮・圧縮テキスト処理アルゴリズム (A-1) 連長圧縮に基づく SUS アルゴリズム (A-2) 圧縮文字列に対する Lyndon 分解計算 (A-3) 動的圧縮 LCE データ構造 (A-4) 動的圧縮索引
(B) 文字列データ構造 (B-1) パック化文字列に対するコンパクト探索木 (B-2) 接尾辞木のフルオンライン構築 (B-3) DAWGのフルオンライン構築 (B-4) 劣線形領域 LCE データ構造 (B-5) 整数アルファベットに対する DAWG の線形時間構築アルゴリズム
(C) 文字列の規則性・繰り返し構造発見 (C-1) 線形時間スクエア分解アルゴリズム,(C-2) O(n log n)時間反復分解アルゴリズム (C-3) ギャップ付き回文の線形時間オンライン計算アルゴリズム (C-4) 腕ギャップ付き回文の線形時間計算アルゴリズム (C-5) 線形時間閉分解計算アルゴリズム (C-6) 一般化周期性補題 (C-7) 接尾辞配列による文字列同値類計算
これらの成果はすべて,文字列に内在する組み合わせ的性質,および高度なデータ構造技術を活用することで達成された.また,これらの結果は,査読付き国際会議および査読付き国際論文誌にて発表済みである.

Current Status of Research Progress
Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

本年度は,主に【研究実績の概要】で述べた研究成果について,査読付き国際会議に12件,査読付き国際ジャーナルに4件の論文を発表するに至った.これらの中には,MFCS 2016 (41st International Symposium on Mathematical Foundations of Computer Science), CPM 2016 (27th Annual Symposium on Combinatorial Pattern Matching) といった,当該分野の第1線で活躍する研究者が集う国際会議,Algorithmica, Discrete Applied Mathematics,Theoretical Computer Science といった定評のある国際論文誌が含まれており,質・量ともに当初の計画を上回る成果を得るに至っている.

Strategy for Future Research Activity

【現在までの進捗状況】で述べたように,これまでに,当初の計画以上の研究成果が得られている.今後も,このままの体制・方針で研究開発を行っていく予定である.

Causes of Carryover

実績報告書に記載した通り,本研究課題では,当初の想定を大きく上回る研究成果を達成するに至っており,H28年度の終盤においても新たな研究成果が実を結びつつあった.そのため,当該研究を完了し,その成果を発表するために,次年度使用額が生じたものである.

Expenditure Plan for Carryover Budget

主に国内会議・研究会での発表に使用する予定である.

  • Research Products

    (33 results)

All 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (16 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 16 results,  Open Access: 8 results) Presentation (12 results) (of which Int'l Joint Research: 12 results) Remarks (2 results)

  • [Int'l Joint Research] University of Helsinki(Finland)

    • Country Name
      Finland
    • Counterpart Institution
      University of Helsinki
  • [Int'l Joint Research] University of Kiel(Germany)

    • Country Name
      Germany
    • Counterpart Institution
      University of Kiel
  • [Int'l Joint Research] King's College London/University of Sheffield(United Kingdom)

    • Country Name
      United Kingdom
    • Counterpart Institution
      King's College London/University of Sheffield
  • [Journal Article] Computing longest single-arm-gapped palindromes in a string2017

    • Author(s)
      Shintaro Narisada, Diptarama, Kazuyuki Narisawa, Shunsuke Inenaga, and Ayumi Shinohara
    • Journal Title

      Proc. SOFSEM 2017

      Volume: LNCS 10139 Pages: 375-386

    • DOI

      10.1007/978-3-319-51963-0_29

    • Peer Reviewed
  • [Journal Article] Longest Common Subsequence in at Least k Length Order-isomorphic Substrings2017

    • Author(s)
      Yohei Ueki, Diptarama, Masatoshi Kurihara, Yoshiaki Matsuoka, Kazuyuki Narisawa, Ryo Yoshinaka, Hideo Bannai, Shunsuke Inenaga, and Ayumi Shinohara
    • Journal Title

      Proc. SOFSEM 2017

      Volume: LNCS 10139 Pages: 363-374

    • DOI

      10.1007/978-3-319-51963-0_28

    • Peer Reviewed
  • [Journal Article] Faster Lyndon factorization algorithms for SLP and LZ78 compressed text2016

    • Author(s)
      Tomohiro I, Yuto Nakashima, Shunsuke Inenaga, Hideo Bannai, and Masayuki Takeda
    • Journal Title

      Theoretical Computer Science

      Volume: 656(B) Pages: 215-224

    • DOI

      10.1016/j.tcs.2016.03.005

    • Peer Reviewed
  • [Journal Article] Generalized pattern matching and periodicity under substring consistent equivalence relations2016

    • Author(s)
      Yoshiaki Matsuoka, Takahiro Aoki, Shunsuke Inenaga, Hideo Bannai, and Masayuki Takeda
    • Journal Title

      Theoretical Computer Science

      Volume: 656(B) Pages: 225-233

    • DOI

      10.1016/j.tcs.2016.02.017

    • Peer Reviewed
  • [Journal Article] Closed Factorization2016

    • Author(s)
      Golnaz Badkobeh, Hideo Bannai, Keisuke Goto, Tomohiro I, Costas S. Iliopoulos, Shunsuke Inenaga, Simon J. Puglisi, and Shiho Sugimoto
    • Journal Title

      Discrete Applied Mathematics

      Volume: 212 Pages: 23-29

    • DOI

      10.1016/j.dam.2016.04.009

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient Computation of Substring Equivalence Classes with Suffix Arrays2016

    • Author(s)
      Kazuyuki Narisawa, Hideharu Hiratsuka, Shunsuke Inenaga, Hideo Bannai, and Masayuki Takeda
    • Journal Title

      Algorithmica

      Volume: - Pages: -

    • DOI

      10.1007/s00453-016-0178-z

    • Peer Reviewed
  • [Journal Article] Computing Smallest and Largest Repetition Factorizations in O(n log n) time2016

    • Author(s)
      Hiroe Inoue, Yoshiaki Matsuoka, Yuto Nakashima, Shunsuke Inenaga, Hideo Bannai, and Masayuki Takeda
    • Journal Title

      Proc. PSC 2016

      Volume: - Pages: 135-145

    • Peer Reviewed / Open Access
  • [Journal Article] Dynamic index and LZ factorization in compressed space2016

    • Author(s)
      Takaaki Nishimoto, Tomohiro I, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Journal Title

      Proc. PSC 2016

      Volume: - Pages: 153-171

    • Peer Reviewed / Open Access
  • [Journal Article] Computing DAWGs and Minimal Absent Words in Linear Time for Integer Alphabets2016

    • Author(s)
      Yuta Fujishige, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Journal Title

      Proc. MFCS 2016

      Volume: - Pages: 38:1-38:14

    • DOI

      10.4230/LIPIcs.MFCS.2016.38

    • Peer Reviewed / Open Access
  • [Journal Article] Shortest Unique Substring Queries on Run-Length Encoded Strings2016

    • Author(s)
      Takuya Mieno, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Journal Title

      Proc. MFCS 2016

      Volume: - Pages: 69:1-69:11

    • DOI

      10.4230/LIPIcs.MFCS.2016.69

    • Peer Reviewed / Open Access
  • [Journal Article] Fully dynamic data structure for LCE queries in compressed space2016

    • Author(s)
      Takaaki Nishimoto, Tomohiro I, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Journal Title

      Proc. MFCS 2016

      Volume: - Pages: 72:1-72:15

    • DOI

      10.4230/LIPIcs.MFCS.2016.72

    • Peer Reviewed / Open Access
  • [Journal Article] Packed Compact Tries: A Fast and Efficient Data Structure for Online String Processing2016

    • Author(s)
      Takuya Takagi, Shunsuke Inenaga, Kunihiko Sadakane, and Hiroki Arimura
    • Journal Title

      Proc. IWOCA 2016

      Volume: LNCS 9843 Pages: 213-225

    • DOI

      10.1007/978-3-319-44543-4_17

    • Peer Reviewed
  • [Journal Article] Finding gapped palindromes online2016

    • Author(s)
      Yuta Fujishige, Michitaro Nakamura, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Journal Title

      Proc. IWOCA 2016

      Volume: LNCS 9843 Pages: 191-202

    • DOI

      10.1007/978-3-319-44543-4_15

    • Peer Reviewed
  • [Journal Article] Fully-online construction of suffix trees for multiple texts2016

    • Author(s)
      Takuya Takagi, Shunsuke Inenaga, and Hiroki Arimura
    • Journal Title

      Proc. CPM 2016

      Volume: - Pages: 22:1-22:13

    • DOI

      10.4230/LIPIcs.CPM.2016.22

    • Peer Reviewed / Open Access
  • [Journal Article] Deterministic sub-linear space LCE data structures with efficient construction2016

    • Author(s)
      Yuka Tanimura, Tomohiro I, Hideo Bannai, Shunsuke Inenaga, Simon J. Puglisi, and Masayuki Takeda
    • Journal Title

      Proc. CPM 2016

      Volume: - Pages: 1:1-1:10

    • DOI

      10.4230/LIPIcs.CPM.2016.1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Factorizing a string into squares in linear time2016

    • Author(s)
      Yoshiaki Matsuoka, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda, and Florin Manea
    • Journal Title

      Proc. CPM 2016

      Volume: - Pages: 27:1-27:12

    • DOI

      10.4230/LIPIcs.CPM.2016.27

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Computing longest single-arm-gapped palindromes in a string2017

    • Author(s)
      Shintaro Narisada, Diptarama, Kazuyuki Narisawa, Shunsuke Inenaga, and Ayumi Shinohara
    • Organizer
      43rd International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2017)
    • Place of Presentation
      Limerick, Ireland
    • Year and Date
      2017-01-16 – 2017-01-20
    • Int'l Joint Research
  • [Presentation] Longest Common Subsequence in at Least k Length Order-isomorphic Substrings2017

    • Author(s)
      Yohei Ueki, Diptarama, Masatoshi Kurihara, Yoshiaki Matsuoka, Kazuyuki Narisawa, Ryo Yoshinaka, Hideo Bannai, Shunsuke Inenaga, and Ayumi Shinohara
    • Organizer
      43rd International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2017)
    • Place of Presentation
      Limerick, Ireland
    • Year and Date
      2017-01-16 – 2017-01-20
    • Int'l Joint Research
  • [Presentation] Computing Smallest and Largest Repetition Factorizations in O(n log n) time2016

    • Author(s)
      Hiroe Inoue, Yoshiaki Matsuoka, Yuto Nakashima, Shunsuke Inenaga, Hideo Bannai, and Masayuki Takeda
    • Organizer
      Prague Stringology Conference 2016 (PSC 2016)
    • Place of Presentation
      Prague, Czech Republic
    • Year and Date
      2016-08-29 – 2016-08-31
    • Int'l Joint Research
  • [Presentation] Dynamic index and LZ factorization in compressed space2016

    • Author(s)
      Takaaki Nishimoto, Tomohiro I, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Organizer
      Prague Stringology Conference 2016 (PSC 2016)
    • Place of Presentation
      Prague, Czech Republic
    • Year and Date
      2016-08-29 – 2016-08-31
    • Int'l Joint Research
  • [Presentation] Computing DAWGs and Minimal Absent Words in Linear Time for Integer Alphabets2016

    • Author(s)
      Yuta Fujishige, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Organizer
      41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      2016-08-22 – 2016-08-26
    • Int'l Joint Research
  • [Presentation] Shortest Unique Substring Queries on Run-Length Encoded Strings2016

    • Author(s)
      Takuya Mieno, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Organizer
      41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      2016-08-22 – 2016-08-26
    • Int'l Joint Research
  • [Presentation] Fully dynamic data structure for LCE queries in compressed space2016

    • Author(s)
      Takaaki Nishimoto, Tomohiro I, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Organizer
      41st International Symposium on Mathematical Foundations of Computer Science (MFCS 2016)
    • Place of Presentation
      Krakow, Poland
    • Year and Date
      2016-08-22 – 2016-08-26
    • Int'l Joint Research
  • [Presentation] Packed Compact Tries: A Fast and Efficient Data Structure for Online String Processing2016

    • Author(s)
      Takuya Takagi, Shunsuke Inenaga, Kunihiko Sadakane, and Hiroki Arimura
    • Organizer
      27th International Workshop on Combinatorial Algorithms (IWOCA 2016)
    • Place of Presentation
      Helsinki, Finalnd
    • Year and Date
      2016-08-17 – 2016-08-19
    • Int'l Joint Research
  • [Presentation] Finding gapped palindromes online2016

    • Author(s)
      Yuta Fujishige, Michitaro Nakamura, Shunsuke Inenaga, Hideo Bannai and Masayuki Takeda
    • Organizer
      27th International Workshop on Combinatorial Algorithms (IWOCA 2016)
    • Place of Presentation
      Helsinki, Finalnd
    • Year and Date
      2016-08-17 – 2016-08-19
    • Int'l Joint Research
  • [Presentation] Fully-online construction of suffix trees for multiple texts2016

    • Author(s)
      Takuya Takagi, Shunsuke Inenaga, and Hiroki Arimura
    • Organizer
      27th Annual Symposium on Combinatorial Pattern Matching (CPM 2016)
    • Place of Presentation
      Tel Aviv, Israel
    • Year and Date
      2016-06-27 – 2016-06-29
    • Int'l Joint Research
  • [Presentation] Deterministic sub-linear space LCE data structures with efficient construction2016

    • Author(s)
      Yuka Tanimura, Tomohiro I, Hideo Bannai, Shunsuke Inenaga, Simon J. Puglisi, and Masayuki Takeda
    • Organizer
      27th Annual Symposium on Combinatorial Pattern Matching (CPM 2016)
    • Place of Presentation
      Tel Aviv, Israel
    • Year and Date
      2016-06-27 – 2016-06-29
    • Int'l Joint Research
  • [Presentation] Factorizing a string into squares in linear time2016

    • Author(s)
      Yoshiaki Matsuoka, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda, and Florin Manea
    • Organizer
      27th Annual Symposium on Combinatorial Pattern Matching (CPM 2016)
    • Place of Presentation
      Tel Aviv, Israel
    • Year and Date
      2016-06-27 – 2016-06-29
    • Int'l Joint Research
  • [Remarks]

    • URL

      https://str.i.kyushu-u.ac.jp/~inenaga/publications.html

  • [Remarks]

    • URL

      http://hyoka.ofc.kyushu-u.ac.jp/search/details/K003385/

URL: 

Published: 2018-01-16  

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