大岩 秀和 (Hidekazu Oiwa)

メール : hidekazu.oiwa at gmail.com

Software Engineer (Machine Learning) at Google


博士 (情報理工学/東京大学)
機械学習・自然言語処理の研究をしています.
English Page is here.

職歴

Recruit Holdings Co., Ltd. 2015/04 >> 2017/12

  • Researcher

Stanford University 2015/09 >> 2017/08

  • Visiting Scholar

NEC Laboratories America

  • 共同研究訪問
  • メンター : Dr. Ryohei Fujimaki

Microsoft Research Asia

  • 研究インターンシップ
  • メンター : Dr. Junichi Tsujii

Preferred Infrastructure

  • インターンシップ
学歴

東京大学 情報理工学系研究科 数理情報学専攻 2010/04 >> 2015/03

東京大学 工学部 システム創成学科 2006/04 >> 2010/03

  • 専門分野: 金融統計・経済学
  • 指導教員: 武田史子 准教授
査読有り
出版・発表等

学術会議

  • "Knowledge Transfer for Out-of-Knowledge-Base Entities: A Graph Neural Network Approach"
    • Takuo Hamaguchi, Hidekazu Oiwa, Masashi Shinbo, Yuji Matsumoto
    • International Joint Conference on Artificial Intelligence. (IJCAI 2017)
    • Acceptance ratio: 26.0%
  • "Partition-wise Linear Models"
    • Hidekazu Oiwa, Ryohei Fujimaki
    • Advances in Neural Information Processing Systems (NIPS 2014)
    • Acceptance ratio: 24.7%
    • [Paper]
  • "Formalizing Word Sampling for Vocabulary Prediction as Graph-based Active Learning"
    • Yo Ehara, Yusuke Miyao, Hidekazu Oiwa, Issei Sato, Hiroshi Nakagawa
    • Conference on Empirical Methods in Natural Language Processing (EMNLP 2014)
    • [Paper]
  • "Robust Distributed Training of Linear Classifiers Based on Divergence Minimization Principle"
    • Junpei Komiyama, Hidekazu Oiwa, Hiroshi Nakagawa
    • European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD 2014)
    • Acceptance ratio: 23.9%
    • [Preprint]
  • "Common Space Embedding of Primal-Dual Relation Semantic Spaces"
    • Hidekazu Oiwa, Jun'ichi Tsujii
    • International Conference on Computational Linguistics (COLING-2014)
    • Acceptance ratio: 31%
    • [Paper]
  • "Online and Stochastic Learning with a Human Cognitive Bias"
    • Hidekazu Oiwa, Hiroshi Nakagawa
    • AAAI Conference on Artificial Intelligence (AAAI-14)
    • Acceptance ratio: 28%
    • [Paper] [Extended Version] [Slides]
  • "Mining words in the minds of second language learners: learner-specific word difficulty"
    • Yo Ehara, Issei Sato, Hidekazu Oiwa, Hiroshi Nakagawa
    • International Conference on Computational Linguistics (COLING-2012)
  • "Healing Truncation Bias : Self-weighted Truncation framework for Dual Averaging"
    • Hidekazu Oiwa, Shin Matsushima, and Hiroshi Nakagawa
    • IEEE International Conference on Data Mining (ICDM 2012)
    • Acceptance ratio: 10.7% (Long Paper)
    • [Preprint] [Slides]
  • "Frequency-aware Truncated methods for Sparse Online Learning"
    • Hidekazu Oiwa, Shin Matsushima, and Hiroshi Nakagawa
    • European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML/PKDD 2011)
    • Acceptance ratio: 20%
  • "The Economic Impact of Herd Behavior in the Japanese Loan Market."
    • Ryuichi Nakagawa, Hidekazu Oiwa, and Fumiko Takeda
    • Western Economic Association International Annual Conference (WEAI 2010)

論文誌

  • "Feature-aware Regularization for Sparse Online Learning"
    • Hidekazu Oiwa, Shin Matsushima, Hiroshi Nakagawa
    • Science China Information Sciences, Vol. 57, Issue 5 1-21, 2014.
  • "The Economic Impact of Herd Behavior in the Japanese Loan Market"
    • Ryuichi Nakagawa, Hidekazu Oiwa, Fumiko Takeda
    • Pacific-Basin Finance Journal, Vol.20 Issue 4 600-613, 2012.
  • "特徴の出現回数に応じたL1正則化を実現する教師ありオンライン学習手法"
    • 大岩秀和, 松島慎, 中川裕志
    • 情報処理学会論文誌:数理モデル化と応用 Vol.4 No.3 84-93, 2011.

ワークショップ

  • "Novel Sparse Modeling by L2 + L0 Regularization”
    • Hidekazu Oiwa, Issei Sato, Hiroshi Nakagawa
    • NIPS Workshop on Discrete and Combinatorial Problems in Machine Learning (DISCML 2013)
  • "Understanding seed selection in bootstrapping"
    • Yo Ehara, Issei Sato, Hidekazu Oiwa, and Hiroshi Nakagawa
    • Graph-Based Methods for Natural Language Processing (TextGraphs-8: EMNLP Workshop, 2013)
受賞・表彰

Microsoft Research Asia Excellent Internship Award2014

  • Microsoft Research Asia

人工知能学会 学生奨励賞2013/06

  • 2013年度 人工知能学会全国大会 (第27回)
  • 発表題目: "授かり効果付きオンライン学習"

情報処理学会 コンピュータサイエンス領域奨励賞

情報処理学会 数理モデル化と問題解決研究会 プレゼンテーション賞2011/03

  • 第82回 数理モデル化と問題解決 研究発表会
  • 論文: "特徴の出現回数に応じたL1正則化を実現する教師ありオンライン学習手法"

東京大学 工学部長賞

東京大学 工学部システム創成学科 優秀論文研究賞2010/03

  • 論文: "The Economic Impact of Herd Behavior in the Japanese Loan Market."
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