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Imakura Akira

face
Affiliation
Faculty of Engineering, Information and Systems
Official title
Associate Professor
Sex
Male
Birth date
1984-01
URL
Email
 
Research fields
High performance computing
Computational science
Research keywords
Numerical Analysis
Eigenvalue problem
Linear system
Machine Learning
Research projects
非線形非負行列分解を用いたディープニューラルネットワーク計算手法の開発2018-04 -- 2020-03今倉暁JST/ACT-I(加速フェーズ)26,000,000Yen
複素モーメント型超並列固有値解析手法に対する数理的耐障害技術の開発2017-04 -- 2021-03Akira ImakuraJapan Society of for the Promotion of Science/Grant-in-Aid for Scientific Research4,030,000Yen
非線形非負行列分解を用いたディープニューラルネットワーク計算手法の開発2016-12 -- 2018-03Akira ImakuraJST/ACT-I3,900,000Yen
大規模連立一次方程式に対する反復法を用いた前処理技術の開発と科学技術計算への応用2013-04 -- 2016-03Akira ImakuraJSPS/Grant-in-Aid for Young Scientists (B)4,030,000Yen
Wavelet変換を用いての超大規模連立一次方程式の前処理の構築2009-04 -- 2011-03Akira ImakuraJSPS/Grant-in-Aid for JSPS Fellows1,400,000Yen
Career history
2019-01 -- (current)University of Tsukuba Faculty of Engineering, Information and Systems Associate Professor
2013-04 -- 2018-12University of Tsukuba Faculty of Engineering, Information and Systems Assistant Professor
2011-04 -- 2013-03University of Tsukuba Center for Computational Sciences Research Fellow
Academic background
2008-04 -- 2011-03Nagoya University Graduate School of Engineering Department of Computational Science and EngineeringCompleted
2006-04 -- 2008-03Nagoya University Graduate School of Engineering Department of Computational Science and EngineeringCompleted
2002-04 -- 2006-03Nagoya University School of Engineering Department of Physical Science and EngineeringGraduated
Degree
2011-03Doctor of EngineeringNagoya University
Academic societies
2015-08 -- (current)SIAM
2013-06 -- (current)Information Processing Society of Japan
2008-06 -- (current)The Japan Society for Industrial and Applied Mathematics
Honors & Awards
2018-11筑波大学 若手教員奨励賞
2017-09日本応用数理学会2017年度年会 最優秀ポスター賞
2017-06日本応用数理学会 2017年研究部会連合発表会 優秀講演賞
2016-09日本応用数理学会2016年度年会 最優秀ポスター賞
2013-12今後のHPC(基盤技術と応用)に関するワークショップ 優秀講演賞
2013-05日本応用数理学会 第9回 若手優秀講演賞(2012年度)
2011-09平成23年度日本応用数理学会論文賞(応用部門)
2010-09平成22年度日本応用数理学会論文賞(ノート部門)
2008-09第3回 計算科学フロンティアフォーラム 分野別最優秀賞(アルゴリズム・CAE・一般)
2008-04ALA2018 The first prize for the best presentation among young participants
Articles
  • Hubness-based Sampling Method for Nystrom Spectral Clustering
    Li Hongmin; Ye Xiucai; Imakura Akira; Sakurai Tetsuya
    Proceeding of the International Joint Conference on Neural Networks (IJCNN 2020)/(accepted), 2020
  • An Oversampling Framework for Imbalanced Classification Based on Laplacian Eigenmaps
    Ye Xiucai; Li Hongmin; Imakura Akira; Sakurai Tetsuya
    Neurocomputing/ in press, 2020
  • Multiclass spectral feature scaling method for dimensionality reduction
    Matsuda M.; Morikuni Keiichi; Imakura A.; Ye X.; Sakurai T.
    Intelligent Data Analysis, in press/24(6), 2020
  • Spectral anomaly detection in large graphs using a complex moment-based eigenvalue solver
    Futamura Yasunori; Ye Xiucai; Imakura Akira; Sakurai Tetsuya
    ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering, 2020
  • Verified partial eigenvalue computations using contour integrals for Hermitian generalized eigenproblems
    Imakura A.; Morikuni K.; Takayasu A.
    Journal of Computational and Applied Mathematics, in press/369(1), 2020
  • Novelty Detection in Multimodal Datasets Based on Least Square Probabilistic Analysis
    Yoda Hiroyuki; Imakura Akira; Matsuda Momo; Ye Xiucai; Te...
    International Journal of Machine Learning and Computing (IJMLC), 2020
  • Efficient variants of the CMRH method for solving a sequence of multi-shifted non-Hermitian linear systems simultaneously
    Gu Xian-Ming; Huang Ting-Zhu; Carpentieri Bruno; Imakura ...
    Journal of Computational and Applied Mathematics, 2020
  • Data Collaboration Analysis Framework Using Centralisation of Individual Intermediate Representations for Distributed Datasets
    Imakura Akira; Sakurai Tetsuya
    ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part A: Civil Engineering, 2020
  • Multiclass spectral feature scaling method for dimensionality reduction
    Matsuda M.; Morikuni K.; Imakura A.; Ye X.; Sakurai T.
    arXiv:1910.07174 [cs.LG]/pp.1-16, 2019-10
  • Distributed Collaborative Feature Selection Based on Intermediate Representation
    Ye Xiucai; Li Hongmin; Imakura Akira; Sakurai Tetsuya
    Proceedings of the 28th International Joint Conference on Artificial Intelligence (IJCAI-19)/pp.4142-4149, 2019-8
  • Efficient implementations of the modified Gram-Schmidt orthogonalization with a non-standard inner product
    Imakura Akira; Yamamoto Yusaku
    Japan Journal of Industrial and Applied Mathematics/36(2)/pp.619-641, 2019-04
  • Simultaneous Band Reduction of Two Symmetric Matrices
    LeiDu; Imakura Akira; Sakurai Tetsuya
    Computers and Mathematics with Applications/77(8)/pp.2207-2220, 2019-04
  • Bin-picking of Randomly Piled Shiny Industrial Objects Using Light Transport Matrix Estimation
    Chiba Naoya; Li Mingyu; Imakura Akira; Hashimoto Koichi
    2019 IEEE International Conference on Robotics and Biomimetics (ROBIO)/pp.7-13, 2019
  • Verified partial eigenvalue computations for Hermitian generalized eigenproblems using contour integrals
    Imakura A.; Morikuni K.; Takayasu A.
    arXiv:1904.06277 [math.NA]/pp.1-13, 2019-04
  • Simultaneous band reduction of two symmetric matrices
    Du Lei; Imakura Akira; Sakurai Tetsuya
    COMPUTERS & MATHEMATICS WITH APPLICATIONS/77(8)/pp.2207-2220, 2019-04
  • Fast ADMM l1 minimization by applying SMW formula and multi-row simultaneous estimation for Light Transport Matrix acquisition
    Chiba Naoya; Imakura Akira; Hashimoto Koichi
    2019 IEEE International Conference on Robotics and Biomimetics (ROBIO)/pp.14-21, 2019
  • Benefits from using mixed precision computations in the ELPA-AEO and ESSEX-II eigensolver projects
    Alvermann Andreas; Basermann Achim; Bungartz Hans-Joachim...
    Japan Journal of Industrial and Applied Mathematics/36(2)/pp.699-717, 2019-04
  • Minimal residual-like condition with collinearity for shifted Krylov subspace methods
    Imakura Akira
    Japan Journal of Industrial and Applied Mathematics/36(2)/pp.643-661, 2019-04
  • Polynomial Preconditioner for Linear Systems with Multiple Right-Hand Sides and Multiple Shifts
    関川 悠太; 二村 保徳; 今倉 暁; 櫻井 鉄也
    Transactions of the Japan Society for Industrial and Applied Mathematics/29(1)/pp.141-164, 2019-03
  • Complex Moment-Based Supervised Eigenmap for Dimensionality Reduction
    Imakura Akira; Matsuda Momo; Ye Xiucai; Sakurai Tetsuya
    The Thirty-Third AAAI Conference on Artificial Intelligence (AAAI-19)/pp.3910-3918, 2019-01
  • 一般化エルミート固有値問題の周回積分型精度保証付き部分固有値計算
    今倉 暁; 保國 惠一; 高安 亮紀
    日本応用数理学会2018年度年会 予稿集/pp.189-190, 2018-09
  • A Look-Back-type restart for the restarted Krylov subspace methods for solving non-Hermitian linear systems
    Imakura Akira; Sogabe Tomohiro; Zhang Shao-Liang
    JAPAN JOURNAL OF INDUSTRIAL AND APPLIED MATHEMATICS/35(2)/pp.835-859, 2018-07
  • An improvement of the nonlinear semi-NMF based method by considering bias vectors and regularization for deep neural networks
    Arai Ryosuke; Imakura Akira; Sakurai Tetsuya
    International Journal of Machine Learning and Computing (IJMLC)/8(3)/pp.191-197, 2018-06
  • Parallel implementation of the nonlinear semi-NMF based alternating optimization method for deep neural networks
    Imakura Akira; Inoue Yuto; Tetsuya Sakurai; Futamura Yasu...
    Neural Processing Letters/47(3)/pp.815-827, 2018-06
  • Verified Partial Eigenvalue Computation for Generalized Hermitian Eigenproblems Using Contour Integrals
    今倉 暁 (Imakura A.); 保國 惠一 (Morikuni K.); 高安 亮紀 ...
    Book of Abstracts, 47th Numerical Analysis Symposium (NAS2018)/pp.1-4, 2018-06
Books
Conference, etc.
  • Bin-picking of Randomly Piled Shiny Industrial Objects Using Light Transport Matrix Estimation
    Chiba Naoya; Li Mingyu; Imakura Akira; Hashimoto Koichi
    The 2019 IEEE International Conference on Robotics and Biomimetics (ROBIO2019)/2019-12-06--2019-12-08
  • Fast ADMM l1 minimization by applying SMW formula and multi-row simultaneous estimation for Light Transport Matrix acquisition
    Chiba Naoya; Imakura Akira; Hashimoto Koichi
    The 2019 IEEE International Conference on Robotics and Biomimetics (ROBIO2019)/2019-12-06--2019-12-08
  • Empirical Study of Non-Model Shared Data Collaboration Analysis Using Pseudo-data
    Nakai Akie; Takahashi Yuta; Imakura Akira; Okada Yukihiko...
    サービス学会 第8回国内大会/2020-03-12--2020-03-13
  • 組織内に分散された共有不能データのデータコラボレーション解析による活用実験
    稲葉 弘明; 今倉 暁; 栗山大輔; 鎮目 進一; 岡田幸彦; 櫻井 鉄也
    サービス学会 第8回国内大会/2020-03-12--2020-03-13
  • Efficient Implementations of the Modified Gram-Schmidt Orthogonalization in a Non-Standard Inner Product
    Yamamoto Yusaku; Imakura Akira
    The 13th workshop in the series of the "Parallel Numerics" (ParNum 2019)/2019-10-28
  • A complex moment-based dimensionality reduction for data analysis
    Imakura Akira; Matsuda Momo; Ye Xiucai; Sakurai Tetsuya
    2019 Mini-Workshop on Computational Science (MWCS2019)/2019-08-18
  • A novel dimensionality reduction method using a complex momnet-based subspace
    Imakura Akira; Sakurai Tetsuya
    International Congress on Industrial and Applied Mathematics (ICIAM2019)/2019-07-15
  • Nonlinear semi-NMF based method for deep neural network computations and its improvements
    Imakura Akira; Sakurai Tetsuya
    International Congress on Industrial and Applied Mathematics (ICIAM2019)/2019-07-15
  • A complex moment-based spectral method for detecting anomalous structures in large graphs
    Sakurai Tetsuya; Funamura Yasunori; Ye Xiucai; Imakura Akira
    International Congress on Industrial and Applied Mathematics (ICIAM2019)/2019-07-15
  • 複素モーメント型部分空間を用いた教師あり次元削減法の提案
    今倉 暁; 松田萌望; 叶 秀彩; 櫻井鉄也
    日本応用数理学会 第15回 研究部会連合発表会/2019-03-04--2019-03-05
  • 複素モーメント型教師あり次元削減法
    今倉 暁; 松田萌望; 叶 秀彩; 櫻井鉄也
    日本応用数理学会 2018年度 年会/2018-09-03--2018-09-05
  • 最小二乗確率的分類器を用いた多峰性のあるデータに対する特異点検出
    与田裕之; 今倉暁; 松田萌望; 叶 秀彩; 櫻井鉄也
    第48回数値解析シンポジウム(NAS2019)/2019-06-10--2019-06-12
  • Distributed Collaborative Feature Selection Based on Intermediate Representation
    Ye Xiucai; Li Hongmin; Akira Imakura; Sakurai Tetsuya
    28th International Joint Conference on Artificial Intelligence (IJCAI-19)/2019-08-10--2019-08-16
  • Benefits from using mixed precision computations in the ELPA-AEO and ESSEX-II eigensolver projects
    Alvermann Andreas; Basermann Achim; Bungartz Hans-Joachim...
    International Workshop on Eigenvalue Problems - Algorithms; Software and Applications, in Petascale Computing (EPASA)/2018-03-05--2018-03-06
  • Minimal residual-like condition with collinearity for shifted Krylov subspace methods
    Imakura Akira
    International Workshop on Eigenvalue Problems - Algorithms; Software and Applications, in Petascale Computing (EPASA)/2018-03-05--2018-03-06
  • Efficient implementations of the modified Gram-Schmidt orthogonalization with a non-standard inner product
    Imakura Akira; Yamamoto Yusaku
    International Workshop on Eigenvalue Problems - Algorithms; Software and Applications, in Petascale Computing (EPASA)/2018-03-05--2018-03-06
  • A complex moment-based method and its improvement for computing partial singular value decomposition
    Imakura Akira; Sakurai Tetsuya
    The 37th JSST Annual International Conference on Simulation Technology (JSST2018)/2018-09-18--2018-09-20
  • Time-efficient tensor reordering procedures for HOTRG in distributed parallel environment
    Yamada Haruka; Imakura Akira; Imamura Toshiyuki; Sakurai ...
    Tensor Network States: Algorithms and Applications (TNSAA)/2018-12-03--2018-12-06
  • Complex Moment-Based Supervised Eigenmap for Dimensionality Reduction
    Imakura Akira; Matsuda Momo; Ye Xiucai; Sakurai Tetsuya
    33rd AAAI Conference on Artificial Intelligence / 31st Innovative Applications of Artificial Intelligence Conference / 9th AAAI Symposium on Educational Advances in Artificial Intelligence/2019-01-28--2019-02-01
  • A contour intergral-based stochastic estimator for eigenvalue counts of generalized eigenproblems
    Futamura Yasunori; Yano Takahiro; Imakura Akira; Sakurai ...
    SIAM Conference on Computational Science and Engineering (CSE19)/2019-02-25--2019-03-01
  • Spectral Anomaly Detection in Large Graphs Using a Complex Moment-based Eigenvalue Solver
    Futamura Yasunori; Ye Xiucai; Imakura Akira; Sakurai Tetsuya
    2019 International Workshop on Cyber-Physical Systems and Cyber-Resilience/2019-03-20--2019-03-20
  • Nonlinear semi-NMF based method for deep neural network computations
    Imakura Akira
    International Symposium on "Digital Science Now"/2019-06-07--2019-06-07
  • Verified computing for partial eigenvalues using a contour integral-type eigensolver
    Takayasu Akitoshi; Imakura Akira; Morikuni Keiichi
    SCAN2018/2018-9-10--2018-9-15
  • Verified partial eigenvalue computation for generalized Hermitian eigenproblems using contour integrals
    今倉暁; 保國 惠一; Takayasu Akitoshi
    第47回数値解析シンポジウム/2018-6-6--2018-6-8
  • 一般化エルミート固有値問題の周回積分型精度保証付き部分固有値計算
    今倉 暁; 保國 惠一; 高安 亮紀
    日本応用数理学会2018年度年会/2018-9-3--2018-9-5
Teaching
2019-10 -- 2019-12Computational AlgorithmsUniversity of Tsukuba.
2019-04 -- 2019-05Information Literacy (Exercises)University of Tsukuba.
2019-10 -- 2020-02Research in Computer ScienceUniversity of Tsukuba.
2019-04 -- 2019-08Research in Computer ScienceUniversity of Tsukuba.
2019-04 -- 2019-07Introduction to Numerical AnalysisUniversity of Tsukuba.
2019-10 -- 2020-02Seminar in Computer ScienceUniversity of Tsukuba.
2019-04 -- 2019-08Seminar in Computer ScienceUniversity of Tsukuba.
2019-04 -- 2019-08Computer Science Seminar AUniversity of Tsukuba.
2019-10 -- 2020-02Computer Science Seminar AUniversity of Tsukuba.
2019-10 -- 2019-12Computational Algorithm and SimulationUniversity of Tsukuba.
Professional activities
2019-04 -- (current)The Japan Society for Industrial and Applied Mathematics (JSIAM)「行列・固有値問題の解法とその応用」研究部会 主査
2016-04 -- (current)日本応用数理学会「行列・固有値問題の解法とその応用」研究部会 幹事
2014-04 -- (current)The Japan Society for Industrial and Applied MathematicsJSIAM Letters 幹事編集委員
2013-04 -- (current)The Japan Society for Industrial and Applied Mathematics「産業における応用数理」研究部会 運営委員
2012-08 -- (current)The Japan Society for Industrial and Applied Mathematics研究部会 若手の会 運営委員
2012-04 -- 2015-03The Japan Society for Industrial and Applied Mathematics学会誌「応用数理」編集委員

(Last updated: 2020-04-20)