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2017 Fiscal Year Annual Research Report

高次元特徴空間の概念選択と基準創発に基づく知識統合基盤の構築

Research Project

Project/Area Number 16H02870
Research InstitutionKyushu Institute of Technology

Principal Investigator

平田 耕一  九州工業大学, 大学院情報工学研究院, 教授 (20274558)

Co-Investigator(Kenkyū-buntansha) 杉山 麿人  国立情報学研究所, 情報学プリンシプル研究系, 准教授 (10733876)
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)
篠原 武  九州工業大学, 大学院情報工学研究院, 教授 (60154225)
久保山 哲二  学習院大学, 計算機センター, 教授 (80302660)
Project Period (FY) 2016-04-01 – 2020-03-31
Keywords概念選択 / 基準創発 / 地均し距離 / 次元縮小 / ピボット選択 / 特徴選択
Outline of Annual Research Achievements

研究目的(1)「離散構造間の距離とカーネルによる概念選択」を達成するために,研究計画(A)「離散構造間の距離による関連度選択」,および,研究計画(D)「離散構造間のカーネルによる類似概念の選択」の一環として,多項式時間では計算できない無順序木編集距離や無順序木カーネルに代わる新たな距離として,多項式時間可能な木の地均し距離として完全部分木に基づく地均し距離を定式化して実装し,木編集距離の変種との関連について実験的に解明した.
研究目的(2)「次元縮小と埋め込みによる概念選択」を達成するために,研究計画(B)「次元縮小による基準軸選択」,および,研究計画(E)「歪み保証の埋め込みによる概念選択」の一環として,高次元データ,特に,その縮小構造であるSketchにおける軸であるピボット選択手法として,新たに,再サンプリングによる焼きなまし法を提案・設計し,実験によってその効果について検証した.
研究目的(3)「高次離散化空間と高次ベクトル空間における基準創発」を達成するために,研究計画(C)「高次離散化空間における基準創発」,および,研究計画(F)「高次ベクトル空間における基準創発」の一環として,高速な一貫性に基づく特徴選択アルゴリズムであるCWCによるインフルエンザウイルスDNAデータからの特徴選択,重集合データから頻出重集合の抽出アルゴリズムの開発,マイクロクラスタリングを利用したトピック抽出などに取り組むと共に,ベクトルや行列を含むテンソルの分解として新たにルジャンドル分解を定式化し,その情報幾何的性質を解明した.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

当初設定した研究計画(A)-(F)に対して,これまでに(A)-(D)については徐々に研究成果が得られていたが,今年度からは(E)と(F)についても業績の端緒が出始めている.(A)と(D)については,新たに,多項式時間計算可能な木の地均し距離を定式化することができた.また,(B)と(E)については,新たに提案した,再サンプリングによる焼きなまし法が,基準軸選択に寄与する可能性が高い.さらに,(C)と(F)については,特徴選択アルゴリズムに加えて,マイクロクラスタリングやテンソル分解など,新たな手法を提案することができた.

Strategy for Future Research Activity

当初設定した研究計画(A)-(F)のうち,3年目に当たる平成30年度は,研究計画(A)と(D)については,地均し距離の考え方に基づくカーネルの設計に取り組む.さらに,離散構造としての木を,応用範囲を考慮しつつ,より一般的な構造へ拡張し,距離やカーネルの設計に取り組む.
また,研究計画(B)と(E)については,再サンプリングによる焼きなまし法の理論的解明,および,それに基づく高精度なピボット選択の開発に取り組む.
さらに,研究計画(C)と(F)については,特徴選択,マイクロクラスタリング,テンソル分解などの手法を展開すると共に,新たに,外れ値検索や二部クラスタリングについての研究にも取り組む.

  • Research Products

    (26 results)

All 2018 2017

All Journal Article (16 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 16 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 10 results)

  • [Journal Article] graphkernels: R and Python packages for graph comparison2018

    • Author(s)
      Mahito Sugiyama, M. Elisabetta Ghisu, Felipe Llinares-Lopez, Karsten M. Borgwardt
    • Journal Title

      Bioinformatics

      Volume: 34 Pages: 530-532

    • DOI

      https://doi.org/10.1093/bioinformatics/btx602

    • Peer Reviewed / Open Access / 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 Koppl, Florin Manea
    • Journal Title

      Theory of Computing Systems

      Volume: 62 Pages: 162--191

    • DOI

      https://doi.org/10.1007/s00224-017-9794-5

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lempel-Ziv Factorization Powered by Space Efficient Suffix Trees2018

    • Author(s)
      Johannes Fischer, Tomohiro I, Dominik Koppl, Kunihiko Sadakane
    • Journal Title

      Algorithmica

      Volume: 80 Pages: 2048-2081

    • DOI

      https://doi.org/10.1007/s00453-017-0333-1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Path Histogram Distance for Rooted Labeled Caterpillars2018

    • Author(s)
      Taiga Kawaguchi, Takuya Yoshino, Kouichi Hirata
    • Journal Title

      Lecture Notes in Artificial Intelligence

      Volume: 10751 Pages: 276-286

    • DOI

      10.1007/978-3-319-75417-8_26

    • 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 Pages: 593-601

    • Peer Reviewed
  • [Journal Article] Extacting Mutually Dependent Multisets2017

    • Author(s)
      Natsuki Kiyota, Sho Shimamura, Kouichi Hirata
    • Journal Title

      Lecture Notes in Artificial Intelligence

      Volume: 10558 Pages: 267-280

    • DOI

      10.1007/978-3-319-67786-6_19

    • Peer Reviewed
  • [Journal Article] sCwc/sLcc: Highly Scalable Feature Selection Algorithms2017

    • Author(s)
      Kilho Shin, Tetsuji Kuboyama, Takako Hashimoto, Dave Shepard
    • Journal Title

      Information

      Volume: 8 Pages: 159

    • DOI

      10.3390/info8040159

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Context-Aware Fitness Function Based on Feature Selection for Evolutionary Learning of Characteristic Graph Patterns2017

    • Author(s)
      Fumiya Tokuhara, Tetsuhiro Miyahara, Tetsuji Kuboyama, Yusuke Suzuki, Tomoyuki Uchida
    • Journal Title

      Lecture Notes in Artificial Intelligence

      Volume: 10191 Pages: 748-757

    • DOI

      10.1007/978-3-319-54472-4_70

    • Peer Reviewed
  • [Journal Article] Topic Extraction on Twitter Considering Author's Role Based on Bipartite Networks2017

    • Author(s)
      Takako Hashimoto, Tetsuji Kuboyama, Hiroshi Okamoto, Kilho Shin
    • Journal Title

      Lecture Notes in Artificial Intelligence

      Volume: 10558 Pages: 239-247

    • DOI

      10.1007/978-3-319-67786-6_17

    • Peer Reviewed
  • [Journal Article] Topic Extraction from Millions of Tweets Based on Community Detection in Bipartite Networks2017

    • Author(s)
      Takako Hashimoto, Tetsuji Kuboyama, Hiroshi Okamoto, Kilho Shin
    • Journal Title

      Frontiers in Artificial Intelligence and Applications

      Volume: 301 Pages: 395-408

    • DOI

      10.3233/978-1-61499-834-1-395

    • Peer Reviewed
  • [Journal Article] Multiple Alignments of Data Objects and Generalized Center Star Algorithm2017

    • Author(s)
      Kilho Shin, Tetsuji Kuboyama, Tetsuhiro Miyahara, Kenji Tanaka
    • Journal Title

      Frontiers in Artificial Intelligence and Applications

      Volume: 299 Pages: 35-45

    • DOI

      10.3233/978-1-61499-828-0-35

    • 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 Pages: 1501-1514

    • DOI

      10.1137/15M1011032

    • Peer Reviewed
  • [Journal Article] A Space-Optimal Grammar Compression2017

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

      Leibniz International Proceedings in Informatics

      Volume: 87 Pages: 67:1-67:15

    • DOI

      10.4230/LIPIcs.ESA.2017.67

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

    • Author(s)
      Tomohiro I
    • Journal Title

      Leibniz International Proceedings in Informatics

      Volume: 78 Pages: 18:1-18:15

    • DOI

      10.4230/LIPIcs.CPM.2017.18

    • 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 / Open Access
  • [Journal Article] A Faster Implementation of Online Run-Length Burrows-Wheeler Transform2017

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

      Lecture Notes in Computer Science

      Volume: 10765 Pages: 409-419

    • DOI

      10.1007/978-3-319-78825-8_33

    • Peer Reviewed
  • [Presentation] Nearest Neighbor Search using Sketches as Quantized Images of Dimension Reduction2018

    • Author(s)
      Naoya Higuchi, Yasunobu Imamura, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara:
    • Organizer
      7th International Conference on Pattern Recognition Applications and Methods
    • Int'l Joint Research
  • [Presentation] Earth Mover's Distance for Rooted Labeled Unordered Trees based on Tai Mapping Hierarchy2018

    • Author(s)
      Taiga Kawaguchi, Kouichi Hirata
    • Organizer
      7th International Conference on Pattern Recognition Applications and Methods
    • Int'l Joint Research
  • [Presentation] Pivot Selection for Dimension Reduction using Annealing by Increasing Resampling2018

    • Author(s)
      Yasunobu Imamura, Naoya Higuchi, Tetsuji Kuboyama, Kouichi Hirata, Takeshi Shinohara
    • Organizer
      Learn. Wissen. Daten. Analysen.
    • Int'l Joint Research
  • [Presentation] On the Earth Mover's Distances Based on Complete Subtrees for Rooted Labeled Trees2017

    • Author(s)
      Taiga Kawaguchi, Kouichi Hirata
    • Organizer
      2017 International Workshop on Smart Info-Media Systems in Asia
    • Int'l Joint Research
  • [Presentation] On the Applications of Iterative Consistency-Based Feature Selection to Nucleotide Sequences for Influenza A Viruses2017

    • Author(s)
      Sho Shomamura, Kouichi Hirata
    • Organizer
      2017 International Workshop on Smart Info-Media Systems in Asia
    • Int'l Joint Research
  • [Presentation] Anchored Alignment Distance between Rooted Labeled Unordered Trees2017

    • Author(s)
      Takuya Yoshino, Yuma Ishizaka, Kouichi Hirata
    • Organizer
      Federated Conference on Computer Science and Information Systems 2017
    • Int'l Joint Research
  • [Presentation] Iterative Feature Selection Based on Binary Consistency2017

    • Author(s)
      Sho Shimamura, Kouichi Hirata
    • Organizer
      8th International Conference on E-Service and Knowledge Management
    • Int'l Joint Research
  • [Presentation] Acquisition of multiple block preserving outerplanar graph patterns by an evolutionary method for graph pattern sets2017

    • Author(s)
      Fumiya Tokuhara, Tetsuhiro Miyahara, Tetsuji Kuboyama, Yusuke Suzuki, Tomoyuki Uchida
    • Organizer
      10th IEEE International Workshop on Computational Intelligence and Applications
    • Int'l Joint Research
  • [Presentation] Topic life cycle extraction from big Twitter data based on community detection in bipartite networks2017

    • Author(s)
      Takako Hashimoto, Hiroshi Okamoto, Tetsuji Kuboyama, Kilho Shin
    • Organizer
      2017 IEEE International Conference on Big Data
    • Int'l Joint Research
  • [Presentation] Tensor Balancing on Statistical Manifold2017

    • Author(s)
      Mahito Sugiyama, Hiroyuki Nakahara, Koji Tsuda
    • Organizer
      34th International Conference on Machine Learning
    • Int'l Joint Research

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Published: 2018-12-17  

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