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A Study of Specializing Natural Language Processing Models for Target Texts

Research Project

Project/Area Number 19K20351
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 61030:Intelligent informatics-related
Research InstitutionNara Institute of Science and Technology (2021-2022)
Institute of Physical and Chemical Research (2019-2020)

Principal Investigator

Ouchi Hiroki  奈良先端科学技術大学院大学, 先端科学技術研究科, 助教 (70825463)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords事例ベース学習 / 表現学習 / 構造予測 / 文法獲得 / トランズダクティブ学習 / Transductive Learning / Transfer Learning / Domain Adaptation / Syntactic Parsing / Semantic Parsing / Language Models / 言語解析 / ニューラルネットワーク
Outline of Research at the Start

自然言語処理における「トランズダクティブ学習」は,もっとも実用的重要性の高い技術の一つであるにも関わらず,未だ実用化に至っていない.本応募課題では,深層学習を用いたトランズダクティブ言語解析の実用化をめざす.トランズダクティブ学習の枠組みでは,解析対象の目標テキストが学習時に所与であり,目標テキストに特化した高精度な解析モデルの構築が目的となる.そのようなモデル構築手法を確立するため,本応募課題では,(1) 目標テキストに特化した分散表現学習手法の開発,および,(2) 目標テキスト内の全事例を考慮した特徴量空間デザイン,という2 つの側面から研究を進める.

Outline of Final Research Achievements

We had two objectives in this research.
The first was to develop a method to specialize distributed representations to target texts and to test its effectiveness. This was successfully accomplished in 2019.
From 2020 onward, we worked on the second objective; developing methods to learn instances with the same label so that they are located near each other in the feature vector space and verifying the effectiveness. By applying distance learning to a deep neural network that maps each instance to a feature vector space, we achieved learning so that instances with the same label are close to each other in the feature vector space. As a result, test instances could be classified based on their similarity to the training instances.

Academic Significance and Societal Importance of the Research Achievements

一つ目の研究目的遂行によって、目標テキストが所与の場合はそのテキストに単語分散表現(言語モデル)を特化させることが効果的であることを示された。実応用の文脈で言い換えると、解析したい(目標)テキスト集合を手元に保有している一般企業やユーザーは、本提案手法のように目標テキストにモデルを特化させることによってより効果的に解析可能であることが示唆された。
二つ目の研究目的遂行によって、従来の深層ニューラルネットが抱える解釈性の問題への緩和策を提示した。例えば、「この学習事例と類似しているため、このテスト事例はこのように分類します」といったように、根拠を提示しながら予測を行えるようになった。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2023 2022 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (17 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results)

  • [Journal Article] Enhancing Semantic Correlation between Instances and Relations for Zero-Shot Relation Extraction2023

    • Author(s)
      Van-Hien Tran, Hiroki Ouchi, Hiroyuki Shindo, Yuji Matsumoto, Taro Watanabe
    • Journal Title

      Journal of Natural Language Processing

      Volume: 30

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Instance-Based Neural Dependency Parsing2021

    • Author(s)
      Ouchi Hiroki、Suzuki Jun、Kobayashi Sosuke、Yokoi Sho、Kuribayashi Tatsuki、Yoshikawa Masashi、Inui Kentaro
    • Journal Title

      Transactions of the Association for Computational Linguistics

      Volume: 9 Pages: 1493-1507

    • DOI

      10.1162/tacl_a_00439

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Improving Discriminative Learning for Zero-Shot Relation Extraction2022

    • Author(s)
      Van-Hien Tran, Hiroki Ouchi, Taro Watanabe, Yuji Matsumoto
    • Organizer
      1st Workshop on Semiparametric Methods in NLP: Decoupling Logic from Knowledge
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Law Retrieval with Supervised Contrastive Learning Using the Hierarchical Structure of Law2022

    • Author(s)
      Jungmin Choi, Ukyo Honda, Taro Watanabe, Hiroki Ouchi, Kentaro Inui
    • Organizer
      36th Pacific Asia Conference on Language, Information and Computation
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] JADES: New Text Simplification Dataset in Japanese Targeted at Non-Native Speakers2022

    • Author(s)
      Akio Hayakawa, Tomoyuki Kajiwara, Hiroki Ouchi, Taro Watanabe
    • Organizer
      Workshop on Text Simplification, Accessibility, and Readability (TSAR-2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Iterative Span Selection: Self-Emergence of Resolving Orders in Semantic Role Labeling2022

    • Author(s)
      Shuhei Kurita, Hiroki Ouchi, Kentaro Inui, Satoshi Sekine
    • Organizer
      29th International Conference on Computational Linguistics
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 言語モデルの第二言語獲得効率2022

    • Author(s)
      大羽未悠, 栗林樹生, 大内 啓樹, 渡辺 太郎
    • Organizer
      情報処理学会自然言語処理研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Instance-Based Neural Dependency Parsing2022

    • Author(s)
      Hiroki Ouchi
    • Organizer
      60th Annual Meeting of the Association for Computational Linguistics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pseudo Zero Pronoun Resolution Improves Zero Anaphora Resolution2021

    • Author(s)
      Konno Ryuto
    • Organizer
      The 2021 Conference on Empirical Methods in Natural Language Processing
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] An Empirical Study of Span Representations in Argumentation Structure Parsing2021

    • Author(s)
      Tatsuki Kuribayashi
    • Organizer
      言語処理学会年次大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 事例ベース依存構造解析のための依存関係表現学習2021

    • Author(s)
      Hiroki Ouchi
    • Organizer
      言語処理学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 事例ベース推論を行うニューラルモデルの説明性とハブ現象の関係2021

    • Author(s)
      Shun Sato
    • Organizer
      情報処理学会自然言語処理研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] 説明性の高いニューラルモデルの予測確信度に関する分析2021

    • Author(s)
      Shun Sato
    • Organizer
      言語処理学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 説明性の高いニューラルモデルの予測確信度に関する分析2021

    • Author(s)
      佐藤俊
    • Organizer
      言語処理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Instance-Based Learning of Span Representations: A Case Study through Named Entity Recognition2020

    • Author(s)
      Hiroki Ouchi
    • Organizer
      Association for Computational Linguistics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] スパン間の類似性に基づく事例ベース構造予測2020

    • Author(s)
      大内啓樹, 鈴木潤, 小林颯介, 横井祥, 栗林樹生, 乾健太郎
    • Organizer
      言語処理学会第26回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 単一評価サンプルのためのトランズダクティブ学習2020

    • Author(s)
      佐々木翔大, 大内啓樹, 鈴木潤, Ana Brassard, 乾 健太郎
    • Organizer
      言語処理学会第26回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 評価データのクラスタリングを用いた記述式答案自動採点のためのトランズダクティブ学習2020

    • Author(s)
      佐藤俊, 佐々木翔大, 大内啓樹, 鈴木潤, 乾健太郎
    • Organizer
      言語処理学会第26回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Transductive Learning of Neural Language Models for Syntactic and Semantic Analysis2019

    • Author(s)
      Hiroki Ouchi, Jun Suzuki
    • Organizer
      The 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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