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マイクロブログで言及される事物に関する緊急イベントの究明とその実時間モニタリング

Research Project

Project/Area Number 18J22830
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Intelligent informatics
Research InstitutionThe University of Tokyo
Research Fellow 赤崎 智  東京大学, 情報理工学系研究科, 特別研究員(DC1)
Project Period (FY) 2018-04-25 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2020: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2019: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2018: ¥1,000,000 (Direct Cost: ¥1,000,000)
KeywordsWebマイニング / ソーシャルメディア / 自然言語処理 / 固有表現抽出 / エンティティリンキング / エンティティタイピング
Outline of Annual Research Achievements

本研究では,「総武線の遅延」,「SMAPの解散」,「iPhone 8の爆発」,「Nintendo Switchの発売」などの,人の意思決定に影響を与える「事物の緊急イベント」をマイクロブログからリアルタイムで発見するシステムを実現する.まず,事物の緊急イベントというのは自明ではないため,過去の新聞やニュース記事などのイベントからマイクロブログ上で反響のあったイベントを見つけ出し,それに関するマイクロブログの言及をパターンとしてデータベースに集積する.次に,低頻度だが多数のロングテールな事物や新規に発生する事物については,緊急イベントを発見するための統計的な手がかりが得られないため,その事物の概念(上位語)を推定する手法を確立する.以上の2つの技術を統合し,緊急イベントに関する言及のパターンを事物の概念単位で共有し,あらゆる事物の緊急イベントのリアルタイムな把握を実現することを目的とする.
本年度は,前年度から継続して行っていたマイクロブログから発見した事物の上位語やタイプへの汎化についての研究について,国際会議投稿のために手法の再実装と評価を詳細に行った.提案手法の概要は以下の通りである.1.既存手法が単一の投稿からタイプ分類を行っているのに対し,提案手法はマイクロブログの特性を生かし,同時間帯に出現する複数の投稿をモデルの入力として用いて頑健なタイプ分類を行う.2.機械学習のモデルとしてテキスト本文だけでなく,事物の表層文字列や,対象の事物と共起する事物,投稿のユーザIDやURLの文字列といった,メタ的な情報などをも駆使する深層学習手法を考案し,複数の情報から相補的にタイプ分類を行う.実験では,既存のモデルの性能を上回り最高性能を達成したほか,ノイジーなコンテキストが多く分類が難しい同名異義な事物についても大幅な性能向上を達成した.

Research Progress Status

令和2年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和2年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(19 results)

All 2020 2019 2018

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Personal Semantic Variations in Word Meanings: Induction, Application, and Analysis2020

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Satoshi Akasaki, Naoki Yoshinaga, Masashi Toyoda
    • Journal Title

      Journal of Natural Language Processsing

      Volume: 27

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Personal Semantic Variations in Word Meanings: Induction, Application2020

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Satoshi Akasaki, Naoki Yoshinaga, Masashi Toyoda
    • Journal Title

      自然言語処理

      Volume: Vol.27 No.2

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Early Discovery of Emerging Entities in Microblogs2019

    • Author(s)
      Satoshi Akasaki, Naoki Yoshinaga, Masashi Toyoda
    • Journal Title

      Proceedings of the 28th International Joint Conference on Artificial Intelligence

      Volume: - Pages: 4882-4889

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Conversation Initiation by Diverse News Contents Introduction2019

    • Author(s)
      Satoshi Akasaki, Nobuhiro Kaji
    • Journal Title

      Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies

      Volume: - Pages: 3988-3998

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modeling Personal Biases in Language Use by Inducing Personalized Word Embeddings2019

    • Author(s)
      Oba Daisuke, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Journal Title

      Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies

      Volume: - Pages: 2102-2108

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Understanding Interpersonal Variations in Word Meanings via Review Target Identification2019

    • Author(s)
      Oba Daisuke, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Journal Title

      Computational Linguistics and Intelligent Text Processing

      Volume: 129

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Modeling Personal Biases in Language Use by Inducing Personalized Word Embeddings2019

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Journal Title

      Proceedings of the 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies

      Volume: -

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Understanding Interpersonal Variations in Word Meanings via Review Target Identification2019

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Journal Title

      Proceedings of the 20th International Conference on Computational Linguistics and Lntelligent Text Processing

      Volume: -

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Early Discovery of Emerging Entities in Microblogs2019

    • Author(s)
      Satoshi Akasaki
    • Organizer
      The 28th International Joint Conference on Artificial Intelligence (IJCAI2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Conversation Initiation by Diverse News Contents Introduction2019

    • Author(s)
      Satoshi Akasaki
    • Organizer
      The 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL-HLT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling Personal Biases in Language Use by Inducing Personalized Word Embeddings2019

    • Author(s)
      Daisuke Oba
    • Organizer
      The 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies (NAACL-HLT2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Understanding Interpersonal Variations in Word Meanings via Review Target Identification2019

    • Author(s)
      Daisuke Oba
    • Organizer
      The 20th International Conference on Computational Linguistics and Intelligent Text Processing
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 人の言語使用における単語の意味の揺らぎの解明に向けて2019

    • Author(s)
      大葉大輔,佐藤翔悦,赤崎智,吉永直樹,豊田正史
    • Organizer
      言語処理学会第25回年次大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Early Discovery of Emerging Entities in Microblogs2019

    • Author(s)
      Satoshi Akasaki, Naoki Yoshinaga, Masashi Toyoda
    • Organizer
      The 28th International Joint Conference on Artificial Intelligence
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Conversation Initiation by Diverse News Contents Introduction2019

    • Author(s)
      Satoshi Akasaki, Nobuhiro Kaji
    • Organizer
      The 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling Personal Biases in Language Use by Inducing Personalized Word Embeddings2019

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Organizer
      The 2019 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Understanding Interpersonal Variations in Word Meanings via Review Target Identification2019

    • Author(s)
      Daisuke Oba, Shoetsu Sato, Naoki Yoshinaga, Satoshi Akasaki, Masashi Toyoda
    • Organizer
      The 20th International Conference on Computational Linguistics and Lntelligent Text Processing
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 五感に基づく言語表現における個人のバイアスとその補正2018

    • Author(s)
      大葉大輔,吉永直樹,赤崎智,豊田正史
    • Organizer
      NLP若手の会 第13回シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] ソーシャルメディアストリームからの新固有表現の発見2018

    • Author(s)
      赤崎智,吉永直樹,豊田正史
    • Organizer
      第32回人工知能学会全国大会
    • Related Report
      2018 Annual Research Report

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Published: 2018-05-01   Modified: 2021-12-27  

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