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Opinion Mining from Texts Including Quoted Others' Opinions

Research Project

Project/Area Number 17K00298
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Intelligent informatics
Research InstitutionJapan Advanced Institute of Science and Technology

Principal Investigator

Shirai Kiyoaki  北陸先端科学技術大学院大学, 先端科学技術研究科, 准教授 (30302970)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsオピニオンマイニング / 極性判定 / 機械学習 / テキストの極性判定 / 自然言語処理
Outline of Final Research Achievements

This research project aims at the polarity classification of texts (blog articles) including quotation of other articles toward opinion mining of social issues. First, a quoted text is extracted from a given blog article. Next, the polarity of a text written by a user and a quoted text written by others is identified. Then, a quotation type (“agree”, “disagree”, or “unrelated”) is identified, which stands for relation between the original and quoted texts. Finally, the polarity of the whole blog article is determined by considering the above results. In the experiments, the accuracy of the polarity classification of the proposed method was 0.942, which largely outperformed the baseline (0.893).

Academic Significance and Societal Importance of the Research Achievements

不特定多数のユーザが書いたテキストから特定の対象に対するユーザの意見や評判を明らかにするオピニオンマイニングは重要な研究課題である.特に時事問題を対象にしたオピニオンマイニングは,社会情勢を低コストで把握することができるため有用である.本研究課題は,他者の記事の引用を含むテキストの極性判定の精緻化によりオピニオンマイニングの正確性を向上させるものであり,その社会的意義は大きい.
これまでの極性判定の研究では,判定対象となるテキストの部分の性質の違いに着目した研究は少ない.本研究課題は,引用されたテキストとそうでないテキストを分けて処理することで極性判定の性能を向上させる点に学術的意義がある.

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (3 results)

All 2019 2018

All Presentation (3 results) (of which Int'l Joint Research: 2 results)

  • [Presentation] 引用関係の解析に基づくテキストの極性判定2019

    • Author(s)
      村松健太, 白井清昭
    • Organizer
      言語処理学会第25回年次大会. pp.1149-1152
    • Related Report
      2018 Research-status Report
  • [Presentation] A Joint Model of Term Extraction and Polarity Classification for Aspect-based Sentiment Analysis2018

    • Author(s)
      Hy Nguyen, Kiyoaki Shirai
    • Organizer
      The 10th International Conference on Knowledge and Systems Engineering. pp.323-328
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Automatic Acquisition of Opinion Words from Myanmar Facebook Movie Comments2018

    • Author(s)
      Win Win Thant, Kiyoaki Shirai
    • Organizer
      The 13th Workshop on Asian Language Resources
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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