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2017 Fiscal Year Annual Research Report

Information Implosion Foundational Technology

Research Project

Project/Area Number 25240003
Research InstitutionKyushu University

Principal Investigator

竹田 正幸  九州大学, システム情報科学研究院, 教授 (50216909)

Co-Investigator(Kenkyū-buntansha) 定兼 邦彦  東京大学, 大学院情報理工学系研究科, 教授 (20323090)
坂本 比呂志  九州工業大学, 大学院情報工学研究院, 教授 (50315123)
瀧本 英二  九州大学, システム情報科学研究院, 教授 (50236395)
坂内 英夫  九州大学, システム情報科学研究院, 准教授 (20323644)
稲永 俊介  九州大学, システム情報科学研究院, 准教授 (60448404)
喜田 拓也  北海道大学, 情報科学研究科, 准教授 (70343316)
畑埜 晃平  九州大学, 基幹教育院, 准教授 (60404026)
井 智弘  九州工業大学, 若手研究者フロンティア研究アカデミー, 特任助教 (20773360)
中島 祐人  九州大学, システム情報科学研究院, 助教 (80804682)
Project Period (FY) 2013-04-01 – 2018-03-31
Keywords情報爆縮 / 圧縮データ処理 / アルゴリズム / データ圧縮 / 簡潔データ構造
Outline of Annual Research Achievements

情報爆発時代が到来し、機械可能なデータが増加の一途を辿っている。多くの機関や企業にとって、増え続けるデータをデータベース (DB)に格納し管理することは、費用対効果の面から事実上不可能である。そこで、より低コストでデータを格納・管理・検索・解析することのできる新しいタイプの情報システムを可能とする基盤技術の開発から、喫緊の課題となっている。
本研究では、膨れ上がるデータを爆発的に凝縮することにより「データ量削減」「データ処理の高速化」「知識獲得」の3つを同時に達成することの可能な情報爆縮基盤技術を確立し、新世代情報システムの実現を目指す。このために、次の3つの研究項目をおいて研究を行なう。これらは互いに関連が深いため、研究成果を相互に活用しながら研究開発を遂行する。(A)高圧縮率データ圧縮アルゴリズム。(B)圧縮データ上の高速データ処理アルゴリズム。(C) 大規模圧縮データ解析手法。
最終年度である平成29年度は、(A)(B)(C)の各々について精力的に研究を進め,順序保存パターン照合アルゴリズム,LCEクエリのための効率的データ構造,制約付き類似文字列比較,最短ユニーク文字列探索アルゴリズムなど,数多くの成果を得た。また、(A)(B)(C)で開発した技術の効率化に役立つことの期待できる,連の出現数やLyndon文字列,アーベル文字列など,文字列に関する代数的・組合せ的性質について研究を進め,深い知見を得た。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

  • Research Products

    (51 results)

All 2018 2017

All Journal Article (30 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 30 results) Presentation (21 results) (of which Int'l Joint Research: 21 results)

  • [Journal Article] Shortest Unique Palindromic Substring Queries in Optimal Time2018

    • Author(s)
      Yuto Nakashima, Takuya Takagi, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Journal Title

      Proceedings of the 28th International Workshop on Combinational Algorithms (IWOCA 2017), Lecture Notes in Computer Science

      Volume: 10765 Pages: 397-408

    • DOI

      10.1007/978-3-319-78825-8_32

    • Peer Reviewed
  • [Journal Article] Computing Abelian String Regularities Based on RLE2018

    • Author(s)
      Shiho Sugimoto, Naoki Noda, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Journal Title

      Proceedings of the 28th International Workshop on Combinational Algorithms (IWOCA 2017), Lecture Notes in Computer Science

      Volume: 10765 Pages: 420-431

    • DOI

      10.1007/978-3-319-78825-8_34

    • Peer Reviewed
  • [Journal Article] Approximate Frequent Pattern Discovery in Compressed Space2018

    • Author(s)
      Shouhei Fukunaga, Yoshimasa Takabatake, Tomohiro I, Hiroshi Sakamoto
    • Journal Title

      IEICE Transactions

      Volume: 101-D(3) Pages: 593-601

    • Peer Reviewed
  • [Journal Article] Efficient Reformulation of 1-Norm Ranking SVM2018

    • Author(s)
      Daiki Suehiro, Kohei Hatano, Eiji Takimoto
    • Journal Title

      IEICE Transactions

      Volume: 101-D(3) Pages: 719-729

    • Peer Reviewed
  • [Journal Article] Boosting over Non-deterministic ZDDs2018

    • Author(s)
      Takahiro Fujita, Kohei Hatano, Eiji Takimoto
    • Journal Title

      Proceedings of the 12th International Conference on Algorithms and Computation (WALCOM 2018), Lecture Notes in Computer Science

      Volume: 10755 Pages: 195-206

    • DOI

      10.1007/978-3-319-75172-6_17

    • Peer Reviewed
  • [Journal Article] Diverse Palindromic Factorization is NP-Complete2018

    • Author(s)
      Hideo Bannai, Travis Gagie, Shunsuke Inenaga, Juha K_rkk_inen, Dominik Kempa, Marcin Piatkowski, Shiho Sugimoto
    • Journal Title

      Int. J. Found. Comput. Sci.

      Volume: 29(2) Pages: 143-164

    • DOI

      10.1142/S0129054118400014

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A hardness result and new algorithm for the longest common palindromic subsequence problem2018

    • Author(s)
      Shunsuke Inenaga, Heikki Hyyr_
    • Journal Title

      Inf. Process. Lett.

      Volume: 129 Pages: 11-15

    • DOI

      10.1016/j.ipl.2017.08.006

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tighter Bounds and Optimal Algorithms for All Maximal α-gapped Repeats and Palindromes - Finding All Maximal α-gapped Repeats and Palindromes in Optimal Worst Case Time on Integer Alphabets2018

    • Author(s)
      Pawel Gawrychowski, Tomohiro I, Shunsuke Inenaga, Dominik K_ppl, Florin Manea
    • Journal Title

      Theory Comput. Syst.

      Volume: 62(1) Pages: 162-191

    • DOI

      10.1007/s00224-017-9794-5

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient Computation of Substring Equivalence Classes with Suffix Arrays2017

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

      Algorithmica

      Volume: 79(2) Pages: 291-318

    • DOI

      10.1007/s00453-016-0178-z

    • Peer Reviewed
  • [Journal Article] The "Runs" Theorem2017

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

      SIAM J. Comput.

      Volume: 46(5) Pages: 1501-1514

    • DOI

      10.1137/15M1011032

    • Peer Reviewed
  • [Journal Article] Inferring strings from Lyndon factorization2017

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

      Theor. Comput. Sci.

      Volume: 689 Pages: 147-156

    • DOI

      10.1016/j.tcs.2017.05.038

    • Peer Reviewed
  • [Journal Article] Faster STR-IC-LCS Computation via RLE2017

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

      Proceedings of the 28th Annual Symposium on Combinatorial Pattern Matching (CPM 2017), LIPICS

      Volume: 78 Pages: 20:1-20:12

    • DOI

      10.4230/LIPIcs.CPM.2017.20

    • Peer Reviewed
  • [Journal Article] Tight Bounds on the Maximum Number of Shortest Unique Substrings2017

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

      Proceedings of the 28th Annual Symposium on Combinatorial Pattern Matching (CPM 2017), LIPICS

      Volume: 78 Pages: 24:1-24:11

    • DOI

      10.4230/LIPIcs.CPM.2017.24

    • Peer Reviewed
  • [Journal Article] Almost Linear Time Computation of Maximal Repetitions in Run Length Encoded Strings2017

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

      Proceedings of the 28th International Symposium on Algorithms and Computation (ISAAC 2017), LIPICS

      Volume: 92 Pages: 33:1-33:12

    • DOI

      10.4230/LIPIcs.ISAAC.2017.33

    • Peer Reviewed
  • [Journal Article] Small-Space LCE Data Structure with Constant-Time Queries2017

    • Author(s)
      Yuka Tanimura, Takaaki Nishimoto, Hideo Bannai, Shunsuke Inenaga, Masayuki Takeda
    • Journal Title

      Proceedings of the 42nd International Symposium on Mathematical Foundations of Computer Science (MFCS 2017), LIPICS

      Volume: 83 Pages: 10:1-10:15

    • DOI

      10.4230/LIPIcs.MFCS.2017.10

    • Peer Reviewed
  • [Journal Article] Order Preserving Pattern Matching on Trees and DAGs2017

    • Author(s)
      Temma Nakamura, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Journal Title

      Proceedings of the 24th International Symposium on String Processing and Information Retrieval (SPIRE 2017), Lecture Notes in Computer Science

      Volume: 10508 Pages: 271-277

    • DOI

      10.1007/978-3-319-67428-5_23

    • Peer Reviewed
  • [Journal Article] On Reverse Engineering the Lyndon Tree2017

    • Author(s)
      Yuto Nakashima, Takuya Takagi, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Journal Title

      Proceedings of the Prague Stringology Conference 2017 (PSC 2017)

      Volume: PSC 2017 Pages: 108-117

    • Peer Reviewed
  • [Journal Article] Packed Compact Tries: A Fast and Efficient Data Structure for Online String Processing2017

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

      IEICE Transactions

      Volume: 100-A(9) Pages: 1785-1793

    • Peer Reviewed
  • [Journal Article] A Succinct Data Structure for Multidimensional Orthogonal Range Searching2017

    • Author(s)
      Kazuki Ishiyama, Kunihiko Sadakane
    • Journal Title

      Proceedings of 2017 Data Compression Conference (DCC 2017)

      Volume: DCC 2017 Pages: 270-279

    • DOI

      10.1109/DCC.2017.47

    • Peer Reviewed
  • [Journal Article] Practical Space-Efficient Data Structures for High-Dimensional Orthogonal Range Searching2017

    • Author(s)
      Kazuki Ishiyama, Kunihiko Sadakane
    • Journal Title

      Proceedings of the 10th International Conference on Similarity Search and Applications (SISAP 2017), Lecture Notes in Computer Science

      Volume: 10609 Pages: 234-246

    • DOI

      10.1007/978-3-319-68474-1_16

    • Peer Reviewed
  • [Journal Article] Succinct Quadtrees for Road Data2017

    • Author(s)
      Kazuki Ishiyama, Koji Kobayashi, Kunihiko Sadakane
    • Journal Title

      Proceedings of the 10th International Conference on Similarity Search and Applications (SISAP 2017), Lecture Notes in Computer Science

      Volume: 10609 Pages: 262-272

    • DOI

      10.1007/978-3-319-68474-1_18

    • Peer Reviewed
  • [Journal Article] A Space-Efficient Algorithm for the Dynamic DFS Problem in Undirected Graphs2017

    • Author(s)
      Kengo Nakamura, Kunihiko Sadakane
    • Journal Title

      Proceedings of the 11th International Conference and Workshops on Algorithms and Computation (WALCOM 2017), Lecture Notes in Computer Science

      Volume: 10167 Pages: 295-307

    • DOI

      10.1007/978-3-319-53925-6_23

    • Peer Reviewed
  • [Journal Article] Compression with the tudocomp Framework2017

    • Author(s)
      Patrick Dinklage, Johannes Fischer, Dominik K_ppl, Marvin L_bel, Kunihiko Sadakane
    • Journal Title

      Proveedings of the 16th International Symposium on Experimental Algorithms (SEA 2017), LIPICS

      Volume: 75 Pages: 13:1-13:22

    • DOI

      10.4230/LIPIcs.SEA.2017.13

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Space-Optimal Grammar Compression2017

    • Author(s)
      Yoshimasa Takabatake, Tomohiro I, Hiroshi Sakamoto
    • Journal Title

      Proceedings of the 25th Annual European Symposium on Algorithms (ESA 2017), LIPICS

      Volume: 87 Pages: 67:1-67:15

    • DOI

      10.4230/LIPIcs.ESA.2017.67

    • Peer Reviewed
  • [Journal Article] Computing All Distinct Squares in Linear Time for Integer Alphabets2017

    • Author(s)
      Hideo Bannai, Shunsuke Inenaga, Dominik K_ppl
    • Journal Title

      Proceedings of the 28th Annual Symposium on Combinatorial Pattern Matching (CPM 2017), LIPICS

      Volume: 78 Pages: 22:1-22:18

    • DOI

      10.4230/LIPIcs.CPM.2017.22

    • Peer Reviewed / Int'l Joint Research
  • [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, Ayumi Shinohara
    • Journal Title

      Proceedings of the 43rd International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2017), Lecture Notes in Computer Science

      Volume: 10139 Pages: 363-374

    • DOI

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

    • Peer Reviewed
  • [Journal Article] Computing Longest Single-arm-gapped Palindromes in a String2017

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

      Proceedings of the 43rd International Conference on Current Trends in Theory and Practice of Computer Science (SOFSEM 2017), Lecture Notes in Computer Science

      Volume: 10139 Pages: 375-386

    • DOI

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

    • Peer Reviewed
  • [Journal Article] On Two LZ78-style Grammars: Compression Bounds and Compressed-Space Computation2017

    • Author(s)
      Golnaz Badkobeh, Travis Gagie, Shunsuke Inenaga, Tomasz Kociumaka, Dmitry Kosolobov, Simon J. Puglisi
    • Journal Title

      Proceedings of the 24th International Symposium on String Processing and Information Retrieval (SPIRE 2017), Lecture Notes in Computer Science

      Volume: 10508 Pages: 51-67

    • DOI

      10.1007/978-3-319-67428-5_5

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Linear-Size CDAWG: New Repetition-Aware Indexing and Grammar Compression2017

    • Author(s)
      Takuya Takagi, Keisuke Goto, Yuta Fujishige, Shunsuke Inenaga, Hiroki Arimura
    • Journal Title

      Proceedings of the 24th International Symposium on String Processing and Information Retrieval (SPIRE 2017), Lecture Notes in Computer Science

      Volume: 10508 Pages: 304-316

    • DOI

      10.1007/978-3-319-67428-5_26

    • Peer Reviewed
  • [Journal Article] Longest Common Extensions with Recompression2017

    • Author(s)
      Tomohiro I
    • Journal Title

      Proceedings of the 28th Annual Symposium on Combinatorial Pattern Matching (CPM 2017), LIPICS

      Volume: 78 Pages: 18:1-18:15

    • DOI

      10.4230/LIPIcs.CPM.2017.18

    • Peer Reviewed
  • [Presentation] A Space-Efficient Algorithm for the Dynamic DFS Problem in Undirected Graphs2018

    • Author(s)
      Kengo Nakamura, Kunihiko Sadakane
    • Organizer
      WALCOM 2017
    • Int'l Joint Research
  • [Presentation] Boosting over Non-deterministic ZDDs2018

    • Author(s)
      Takahiro Fujita, Kohei Hatano, Eiji Takimoto
    • Organizer
      WALCOM 2018
    • Int'l Joint Research
  • [Presentation] Faster STR-IC-LCS Computation via RLE2017

    • Author(s)
      Keita Kuboi,_Yuta Fujishige,_Shunsuke Inenaga,_Hideo Bannai,_Masayuki Takeda
    • Organizer
      CPM 2017
    • Int'l Joint Research
  • [Presentation] Tight Bounds on the Maximum Number of Shortest Unique Substrings2017

    • Author(s)
      Takuya Mieno, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      CPM 2017
    • Int'l Joint Research
  • [Presentation] Almost Linear Time Computation of Maximal Repetitions in Run Length Encoded Strings2017

    • Author(s)
      Yuta Fujishige, Yuto Nakashima, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      ISAAC 2017
    • Int'l Joint Research
  • [Presentation] Shortest Unique Palindromic Substring Queries in Optimal Time2017

    • Author(s)
      Yuto Nakashima, Takuya Takagi, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      IWOCA 2017
    • Int'l Joint Research
  • [Presentation] Computing Abelian String Regularities Based on RLE2017

    • Author(s)
      Shiho Sugimoto, Naoki Noda, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      IWOCA 2017
    • Int'l Joint Research
  • [Presentation] Small-Space LCE Data Structure with Constant-Time Queries2017

    • Author(s)
      Yuka Tanimura, Takaaki Nishimoto, Hideo Bannai, Shunsuke Inenaga, Masayuki Takeda
    • Organizer
      MFCS 2017
    • Int'l Joint Research
  • [Presentation] Order Preserving Pattern Matching on Trees and DAGs2017

    • Author(s)
      Temma Nakamura, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      SPIRE 2017
    • Int'l Joint Research
  • [Presentation] On Reverse Engineering the Lyndon Tree2017

    • Author(s)
      Yuto Nakashima, Takuya Takagi, Shunsuke Inenaga, Hideo Bannai, Masayuki Takeda
    • Organizer
      PSC 2017
    • Int'l Joint Research
  • [Presentation] A Succinct Data Structure for Multidimensional Orthogonal Range Searching2017

    • Author(s)
      Kazuki Ishiyama, Kunihiko Sadakane
    • Organizer
      DCC 2017
    • Int'l Joint Research
  • [Presentation] Practical Space-Efficient Data Structures for High-Dimensional Orthogonal Range Searching2017

    • Author(s)
      Kazuki Ishiyama, Kunihiko Sadakane
    • Organizer
      SISAP 2017
    • Int'l Joint Research
  • [Presentation] Succinct Quadtrees for Road Data2017

    • Author(s)
      Kazuki Ishiyama, Koji Kobayashi, Kunihiko Sadakane
    • Organizer
      SISAP 2017
    • Int'l Joint Research
  • [Presentation] Compression with the tudocomp Framework2017

    • Author(s)
      Patrick Dinklage, Johannes Fischer, Dominik K_ppl, Marvin L_bel, Kunihiko Sadakane
    • Organizer
      SEA 2017
    • Int'l Joint Research
  • [Presentation] A Space-Optimal Grammar Compression2017

    • Author(s)
      Yoshimasa Takabatake, Tomohiro I, Hiroshi Sakamoto
    • Organizer
      ESA 2017
    • Int'l Joint Research
  • [Presentation] Computing All Distinct Squares in Linear Time for Integer Alphabets2017

    • Author(s)
      Hideo Bannai, Shunsuke Inenaga, Dominik K_ppl
    • Organizer
      CPM 2017
    • 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, Ayumi Shinohara
    • Organizer
      SOFSEM 2017
    • Int'l Joint Research
  • [Presentation] Computing Longest Single-arm-gapped Palindromes in a String2017

    • Author(s)
      Shintaro Narisada, Diptarama, Kazuyuki Narisawa, Shunsuke Inenaga, Ayumi Shinohara
    • Organizer
      SOFSEM 2017
    • Int'l Joint Research
  • [Presentation] On Two LZ78-style Grammars: Compression Bounds and Compressed-Space Computation2017

    • Author(s)
      Golnaz Badkobeh, Travis Gagie, Shunsuke Inenaga, Tomasz Kociumaka, Dmitry Kosolobov, Simon J. Puglisi
    • Organizer
      SPIRE 2017
    • Int'l Joint Research
  • [Presentation] Linear-Size CDAWG: New Repetition-Aware Indexing and Grammar Compression2017

    • Author(s)
      Takuya Takagi, Keisuke Goto, Yuta Fujishige, Shunsuke Inenaga, Hiroki Arimura
    • Organizer
      SPIRE 2017
    • Int'l Joint Research
  • [Presentation] Longest Common Extensions with Recompression2017

    • Author(s)
      Tomohiro I
    • Organizer
      CPM 2017
    • Int'l Joint Research

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Published: 2018-12-17  

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