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Development of statistical methodology and its applications for directional data utilizing international joint research

Research Project

Project/Area Number 19KK0287
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))

Allocation TypeMulti-year Fund
Review Section Basic Section 60030:Statistical science-related
Research InstitutionHosei University (2021-2024)
Nanzan University (2019-2020)

Principal Investigator

Abe Toshihiro  法政大学, 経済学部, 教授 (70580570)

Project Period (FY) 2020 – 2024
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Keywords国際共同研究 / シリンダーモデル / 方向統計学 / データ解析 / 森林生態学 / 数値最適化 / シリンダー分布 / 歪対称分布族 / 円周分布 / 統計的推測理論 / シリンダーデータ / 角度データ / 歪対称モデル / 統計モデリング / EMアルゴリズム / 角度統計 / 生態学 / 推測理論
Outline of Research at the Start

国際的に活躍している研究者らと協力して、角度統計に表れる困難を乗り越えるための統計モデルを考案し、データの背後に潜む現象の解明の定量化を目指す。
主に以下の内容を研究していく。
(1)WeiSSVMモデル(Abe & Ley, 2017)を数学的に一般化し、応用の際に新たな発見が可能となる統計モデルの理論的研究を進める。
(2)WeiSSVMモデルと既存のモデルの改良をしながら、北欧の樹木データに基づいて森林施業にともなう植物多様性の劣化機構とその地理変異を解明する。
(3)(1)と(2)を基にして応用面で必要となる計算統計的手法を構築し、シリンダーモデルを基にしたアルゴリズムの洗練をする。

Outline of Final Research Achievements

At the University of Luxembourg, we advanced the general theory of cylindrical models through discussions on angular modeling and inference, thereby strengthening the framework for international joint research and theoretical development in directional statistics. At the University of Helsinki, we collaborated with applied researchers in forest ecology to investigate recent trends in Finnish forest data and explored the practical applicability of directional models to real-world datasets. As a result, a new international joint research project on the application of cylindrical models was successfully initiated. Building on both theoretical and applied achievements from these collaborations, we have also laid the foundation for hosting an international conference in Japan, contributing to greater international recognition of Japanese researchers in this field.

Academic Significance and Societal Importance of the Research Achievements

ルクセンブルク大学での研究滞在において構築したシリンダーモデルの一般理論は、従来の角度モデルの限界を乗り越える新たな視点を提供し、方向統計学の発展に寄与するとともに、統合的なアプローチの有効性を示す成果となった。さらに、これらの知見をフィンランドの実データ解析や森林生態学に応用することで、モデルの現実的適用可能性をより明確に示すことができた。加えて、多分野にわたる研究者との交流を通じて、方向統計学と他分野との学際的な連携基盤を強化した点も特筆すべきである。こうした国際共同研究を通じて得られた知見とネットワークは、日本の研究基盤の充実と研究者の国際的プレゼンスの向上に大きく寄与するものである。

Report

(6 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (22 results)

All 2025 2024 2023 2022 2021 2020

All Int'l Joint Research (2 results) Journal Article (10 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 10 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 4 results) Book (1 results)

  • [Int'l Joint Research] University of Helsinki(フィンランド)2025

    • Year and Date
      2025-02-23
    • Related Report
      2024 Annual Research Report
  • [Int'l Joint Research] University of Luxembourg(ルクセンブルク)2023

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Modeling Joint Cylindrical Distributions and Related Markov Processes2025

    • Author(s)
      Abe, T., Imoto, T., Shiohama, T. & Miyata, Y.
    • Journal Title

      Felicitation Volume for Prof. Ashis SenGupta

      Volume: - Pages: 103-129

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Cylindrical Models Motivated through Extended Sine-Skewed Circular Distributions2024

    • Author(s)
      Miyata Yoichi、Shiohama Takayuki、Abe Toshihiro
    • Journal Title

      Symmetry

      Volume: 16 Issue: 3 Pages: 295-295

    • DOI

      10.3390/sym16030295

    • Related Report
      2024 Annual Research Report 2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Modeling Joint Cylindrical Distributions and Related Markov Processes2024

    • Author(s)
      Abe Toshihiro、Imoto Tomoaki、Shiohama Takayuki、Miyata Yoichi
    • Journal Title

      Felicitation Volume for Prof. Ashis SenGupta

      Volume: -

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identifiability of asymmetric circular and cylindrical distributions2022

    • Author(s)
      Miyata, Y., Shiohama, T., and Abe, T.
    • Journal Title

      Sankhya A

      Volume: - Issue: 2 Pages: 1-21

    • DOI

      10.1007/s13171-022-00294-3

    • Related Report
      2023 Research-status Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] On some flexible models for circular, toroidal, and cylindrical data2022

    • Author(s)
      Abe, T., Imoto, T., Shiohama, T. & Miyata, Y.
    • Journal Title

      Directional Statistics for Innovative Applications: A Bicentennial Tribute to Florence Nightingale

      Volume: - Pages: 229-243

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Simple construction of a toroidal distribution from independent circular distributions2022

    • Author(s)
      Imoto, T. & Abe, T.
    • Journal Title

      Journal of Multivariate Analysis

      Volume: - Pages: 104799-104799

    • DOI

      10.1016/j.jmva.2021.104799

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bayesian estimation for mode and anti-mode preserving circular distributions2021

    • Author(s)
      T. Abe, Y. Miyata, and T. Shiohama
    • Journal Title

      Econometrics and Statistics

      Volume: - Pages: 136-160

    • DOI

      10.1016/j.ecosta.2021.03.004

    • Related Report
      2023 Research-status Report 2022 Research-status Report 2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] EM algorithm using overparameterization for the multivariate skew-normal distribution2021

    • Author(s)
      Abe Toshihiro、Fujisawa Hironori、Kawashima Takayuki、Ley Christophe
    • Journal Title

      Econometrics and Statistics

      Volume: 19 Pages: 151-168

    • DOI

      10.1016/j.ecosta.2021.03.003

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On some flexible models for circular, toroidal, and cylindrical data2021

    • Author(s)
      Abe, T., Imoto, T., Miyata, Y. & Shiohama, T.
    • Journal Title

      Directional Statistics for Innovative Applications, a Florence Nightingale Bicentennial celebration volume

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Estimation of finite mixture models of skew-symmetric circular distributions2020

    • Author(s)
      Y. Miyata, T. Shiohama, and T. Abe
    • Journal Title

      Metrika

      Volume: 83 Issue: 8 Pages: 895-922

    • DOI

      10.1007/s00184-019-00756-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Cauchy sine-skewed circular distributions and their simple EM algorithm2024

    • Author(s)
      Toshihiro Abe, Tomoaki Imoto
    • Organizer
      構造化されたデータ解析とその統計・機械学習モデルの新展開
    • Related Report
      2024 Annual Research Report
  • [Presentation] Simple EM algorithm for Cauchy-type distributions2023

    • Author(s)
      Toshihiro Abe & Masahiro Kuroda
    • Organizer
      The 6th International Conference on Econometrics and Statistics (EcoSta 2023)
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A simple heavy tailed cylindrical model and its applications2023

    • Author(s)
      Yugo Nakayama & Toshihiro Abe
    • Organizer
      The 16th International Conference of the ERCIM WG on Computational and Methodological Statistics (CMStatistics 2023)
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A simple EM algorithm for circular Cauchy type distributions2023

    • Author(s)
      Toshihiro Abe and Tomoaki Imoto
    • Organizer
      Luxembourg-Waseda Conference on Modelling and Inference for Complex Data
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] wrapped Cauchy分布の非対称化とそのEMアルゴリズム2022

    • Author(s)
      阿部俊弘、井本智明
    • Organizer
      2022年度統計関連学会連合大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 円周上の歪対称分布とその推定について2022

    • Author(s)
      阿部俊弘、井本智明
    • Organizer
      統計科学の開拓
    • Related Report
      2022 Research-status Report
  • [Presentation] Cauchy型分布のEMアルゴリズムについて2021

    • Author(s)
      阿部俊弘
    • Organizer
      統計関連学会連合大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Normal-wrapped Cauchy type cylindrical distribution2021

    • Author(s)
      Toshihiro Abe
    • Organizer
      The 14th International Conference of the ERCIM WG on Computational and Methodological Statistics (CMStatistics 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 多変量歪正規分布における最尤推定のためのEMアルゴリズムとそのモメンタム構造2020

    • Author(s)
      Toshihiro Abe, Hironori Fujisawa, Takayuki Kawashima
    • Organizer
      2020年度統計関連学会連合大会
    • Related Report
      2020 Research-status Report
  • [Book] On some flexible models for circular, toroidal, and cylindrical data2022

    • Author(s)
      Abe, T., Imoto, T., Shiohama, T. & Miyata, Y.
    • Publisher
      Springer
    • ISBN
      9789811910432
    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-02-06   Modified: 2026-01-16  

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