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Morikuni Keiichi

Affiliation
Faculty of Engineering, Information and Systems
Official title
Assistant Professor
Research fields
Mathematical informatics
Computational science
Foundations of mathematics/Applied mathematics
Research keywords
Numerical Computation
Numerical Analysis
Numerical Linear Algebra
Research projects
Convergence Analysis of Krylov Subspace Methods for Singular Systems in Finite Precision Arithmetic2018-10 -- 2018-10Morikuni, K.University of Tsukuba/Short-Term Overseas Travel Grant Program in 2018400,000Yen
精度保証および耐障害技術に基づく周回積分型固有値解法のリスク回避2018-07 -- 2019-03今倉 暁筑波大学/システム情報系若手融合研究プロジェクト500,000Yen
非線形変数変換を用いた積分型固有値解法による固有値解析技術の開発2018-04 -- 2021-03Sakurai, T.Japan Society of for the Promotion of Science/Grant-in-Aid for Scientific Research(B)16,770,000Yen
Contour integral-type anti-perturbation eigensolvers for rectangular matrix pencils2017-08 -- 2018-07Morikuni, K.The Hattori Hokokai Foundation, Public Interest Incorporated Foundation/Grant-in-Aid for Engineering Research1,000,000Yen
精度保証および耐障害技術に基づく周回積分型固有値解法のリスク回避2017-07 -- 2018-03Imakura, A.筑波大学/システム情報系若手融合研究プロジェクト500,000Yen
精度保証および耐障害技術に基づく周回積分型固有値解法のリスク回避2016-07 -- 2017-03Imakura, A.筑波大学/システム情報系若手融合研究プロジェクト300,000Yen
Robust and efficient solutions of large sparse constrained eigenvalue problems2016-04 -- 2020-03Morikuni, K.Japan Society of for the Promotion of Science/Grant-in-Aid for Scientific Research4,030,000Yen
Design and analysis of solution methods for large-scale least squares problems2010-06 -- 2010-07Morikuni, K.The Graduate University for Advanced Studies/Sokendai Short-stay Study Abroad Program 2010400,000Yen
Career history
2015-06 -- (current)University of Tsukuba Division of Information Engineering, Faculty of Engineering, Information and Systems Assistant Professor
2014-04 -- 2015-05Czech Academy of Sciences Institute of Computer Science Postdoctoral Fellow (Czech Academy of Sciences Program of PostDoc Support)
2013-04 -- 2014-03National Institute of Informatics Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST) "Development of the Fastest Database Engine for the Era of Very Large Database and Experiment and Evaluation of Stra Project researcher, Uno Laboratory
2008-05 -- 2013-02National Institute of Informatics Hayami Laboratory Research assistant
Academic background
2008-04 -- 2013-03The Graduate University for Advanced Studies (SOKENDAI) School of Multidisciplinary Sciences Department of Informatics (Five-year Doctoral Program)Completed
2004-04 -- 2008-03Kyushu University School of Design Department of Acoustic DesignGraduated
Degree
2013-03Doctor of PhilosophyThe Graduate University for Advanced Studies
2008-03Bachelor of DesignKyushu University
Academic societies
2013 -- (current)ILAS (International Linear Algebra Society)
2012 -- (current)SIAM (Society for Industrial and Applied Mathematics)
2008 -- (current)The Japan Society for Industrial and Applied Mathematics (JSIAM)
2014 -- 2014Information Processing Society of Japan
2008 -- 2013Acoustical Society of Japan
Honors & Awards
2018-09Best Poster Award at the 2018 JSIAM Annual Meetingスペクトラル特徴量スケーリングの多クラス分類問題への拡張
2017-09Best poster award at the 2017 JSIAM Annual Meeting複素モーメントの誤差評価を用いた周回積分型精度保証付き部分固有値計算 (Contour integral-type verified partial eigenvalue computation via errors of complex moments)
2017-06Best Presentation Award for Young Researchers at the 2016 JSIAM Annual Meeting長方行列束の固有値問題に対する周回積分型解法 (Contour integral-type method for eigenproblems of rectangular matrix pencils)
2015-02Inoue Research Award for Young ScientistsInner-iteration preconditioning for least squares problems
2013-07SIAM Student Paper PrizeInner-Iteration Krylov Subspace Methods for Least Squares Problems, SIAM J. Matrix Anal. Appl., 34 (2013), pp. 1-22"
2013-03The Graduate University for Advanced Studies Nagakura Research Incentive AwardInner-iteration preconditioning for large-scale ill-conditioned least squares problems
2013-03The Graduate University for Advanced Studies Research AwardInner-iteration preconditioning for large-scale ill-conditioned least squares problems
2013-03National Institute of Informatics (NII) Best Student Award
Articles
  • Implementation of interior-point methods for LP based on Krylov subspace iterative solvers with inner-iteration preconditioning
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    Computational Optimization and Applications/74(1)/pp.143-176, 2019-09
  • 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
  • Inner-iteration preconditioning with symmetric splitting matrices for symmetric singular linear systems
    Morikuni K. (保國 惠一)
    Transactions of the Japan Society for Industrial and Applied Mathematics/29(1)/pp.62-77, 2019-03
  • 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
  • Spectral feature scaling method for supervised dimensionality reduction
    Matsuda M.; Morikuni K.; Sakurai T.
    Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence (IJCAI-18), Main track/pp.2560-2566, 2018-07
  • Iterative Methods and Preconditioners for Linear Systems with Singularity
    保國 惠一 (Morikuni K.)
    Bulletin of the Japan Society for Industrial and Applied Mathematics/28(2)/pp.11-18, 2018-06
  • On GMRES for singular EP and GP systems
    Morikuni K.; Rozložník M.
    SIAM Journal on Matrix Analysis and Applications/39(2)/pp.1033-1048, 2018-06
  • 多クラス分類問題に対する スペクトラル特徴量スケーリング
    松田 萌望 (Matsuda M.); 保國 惠一 (Morikuni K.); 櫻井 鉄...
    Book of Abstracts, 47th Numerical Analysis Symposium (NAS2018)/pp.31-34, 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
  • Spectral feature scaling method for supervised dimensionality reduction
    Matsuda M.; Morikuni K.; Sakurai T.
    arXiv:1805.07006 [stat.ML]/pp.1-11, 2018-05
  • On GMRES for singular EP and GP systems
    Morikuni K.; Rozložník M.
    arXiv: 1705.03153 [math.NA]/pp.1-16, 2017-12
  • Inner-Iteration Preconditioning for Singular Linear Systems
    保國 惠一 (Morikuni K.)
    RIMS Kokyuroku, Numerical Analysis: New Developments for Elucidating Interdisciplinary Problems II, 2017-07
  • Verifi ed computation of partial eigenvalues of a real symmetric matrix using contour integration
    Imakura A. (今倉 暁); Morikuni K. (保國 惠一); Takayasu A...
    Book of Abstracts, 46th Numerical Analysis Symposium (NAS2017)/pp.115-118, 2017-06
  • Supervised spectral clustering using feature scaling
    Matsuda M. (松田 萌望); Morikuni K. (保國 惠一); Sakura T...
    Book of Abstracts, 46th Numerical Analysis Symposium (NAS2017)/pp.51-54, 2017-06
  • Inner-iteration preconditioning for singular linear systems
    Morikuni K.
    Program and Abstracts, Householder Symposium XX on Numerical Linear Algebra/pp.230-232, 2017-06
  • GMRES method for singular linear systems
    Morikuni K. (保國 惠一)
    Book of Abstracts, 46th Numerical Analysis Symposium (NAS2017)/pp.17-20, 2017-06
  • Multistep matrix splitting iteration preconditioning for singular linear systems
    Morikuni K.
    Numerical Algorithms/75(2:::SI)/pp.457-475, 2017-05
  • On GMRES for singular EP and GP systems
    Morikuni K.; Rozložník M.
    arXiv/1705.03153 [math.NA] /pp.1-15, 2017-05
  • On GMRES for singular EP and GP systems
    Morikuni K.; Rozložník M.
    Preprint, Institute of Mathematics, The Czech Academy of Sciences/Preprint No. 23-2017/pp.1-15, 2017-05
  • Multistep matrix splitting iteration preconditioning for singular linear systems
    Morikuni K.
    arXiv:1705.03153 [math.NA], 2017-04
  • Inner-iteration preconditioning for singular linear systems
    Morikuni Keiichi
    arXiv:1504.01713v2 [math.NA], 2016-06
  • Rayleigh-Ritz-type contour integral-based eigensolvers for eigenvalue problems of rectangular matrix pencils
    Morikuni K. (保國 惠一)
    Book of Abstracts, 45th Numerical Analysis Symposium (NAS2016)/pp.1-4, 2016-06
  • Implementation of Interior-point Methods for LP based on Krylov Subspace Iterative Solvers with Inner-iteration Preconditioning
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    NII Technical Report, National Institute of Informatics/NII-2016-003E/pp.1-28, 2016-05
  • Implementation of Interior-point Methods for LP based on Krylov Subspace Iterative Solvers with Inner-iteration Preconditioning
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    arXiv:1604.07491 [math.OC]/pp.1-27, 2016-04
  • Application of inner-iteration preconditioning to general least squares problems
    Morikuni K. (保國 惠一)
    Book of Abstracts, Organized Session of Young Researchers Group, Japan SIAM Annual Meeting 2015, 2015-09
Books
  • 第3章 最小二乗乗問題の数値解法, 3.2 反復法
    保國 惠一
    数値線形代数の数理とHPC, 共立出版, pp.141-158, 2018-08
  • Inner-iteration Preconditioning for Least Squares Problems
    保國 惠一
    2013
Conference, etc.
  • Time series motif discovery in matrix profiles via low-rank approximation
    保國 惠一
    Japan SIAM Annual Meeting 2019, Tokyo, Japan/2019-09-03--2019-09-05
  • Semi-automatic spike sorting of long-term tetrode recording in mice
    松本 すみ礼; 保國 惠一; 松田 萌望; 坂本 航太郎; 大山 薫; ...
    The 42th Annual Meeting of the Japan Neuroscience Society, Niigata, Japan/2019-07-25--2019-07-28
  • On GMRES for linear EP and GP systems
    Rozložník M.; Morikuni K.
    International Congress on Industrial and Applied Mathematics (ICIAM2019), Valencia, Spain/2019-07-15--2019-07-19
  • "一般化エルミート固有値問題の部分固有値計算における周回積分に基づく精度保証法の改良"
    保國惠一; 今倉暁; 高安 亮紀
    日本応用数理学会 第15回 研究部会連合発表会/2019-3-4--2019-3-5
  • Verified computing for partial eigenvalues using a contour integral-type eigensolver
    Takayasu Akitoshi; Imakura Akira; Morikuni Keiichi
    SCAN2018/2018-9-10--2018-9-15
  • 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
  • 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
  • Verified partial eigenvalue computation for generalized Hermitian eigenproblems using contour integrals
    今倉暁; 保國惠一; 高安 亮紀
    第47回数値解析シンポジウム, 福井/2019-06-07--2019-06-07
  • 一般化エルミート固有値問題の部分固有値計算における周回積分に基づく精度保証法の改良
    今倉 暁; 保國 惠一; 高安 亮紀
    日本応用数理学会 第15回研究部会連合発表会, つくば/2019-03-04--2019-03-05
  • Numerical behavior of GMRES for singular systems
    Rozložník M.; Morikuni K.
    90th GAMM Annual Meeting, Vienna, Austria/2019-02-18--2019-02-22
  • 特異EPおよびGP系に対する一般化最小残差法の数値的振る舞い
    保國 惠一; Rozložník M.
    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 第26回研究会, 東京/2018-11-28--2018-11-28
  • On GMRES for linear EP and GP systems
    Morikuni K.; Rozložník M.
    GAMM Applied Numerical Linear Algebra (ANLA) Workshop, Lund, Sweden/2018-10-10--2018-10-12
  • Implementation of Interior-point Methods for LP without a Direct Linear Equation Solver
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    The 3rd IMI-ISM-ZIB MODAL Workshop on Challenging in Real World Data Analytics and High-Performance Optimization, Tokyo, Japan/2018-09-26--2018-10-01
  • Verified computing for partial eigenvalues using a contour integral-type eigensolver
    Takayasu A.; Imakura A.; Morikuni Keiichi
    18th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations, Tokyo, Japan/2018-09-10--2018-09-15
  • スペクトラル特徴量スケーリングの多クラス分類問題への拡張
    松田 萌望; 保國 惠一; 今倉 暁; 櫻井 鉄也
    日本応用数理学会2018年度年会, 名古屋/2018-09-03--2018-09-05
  • 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, 名古屋/2018-09-03--2018-09-05
  • GMRES method for singular EP and GP linear systems
    保國 惠一 (Morikuni K.)
    The Seventh China–Japan–Korea Joint Conference on Numerical Mathematics (CJK2018), Kanazawa, Japan/2018-08-22--2018-08-22
  • 線形行列束の部分固有値問題に対する周回積分法
    保國 惠一
    岩手数理科学セミナー, 岩手/2018-07-31--2018-07-31
  • Network organization of cortical neurons across waking and sleep in naturally behaving mice
    大山 薫 (Ohyama K.); Morikuni K. (保國 惠一); Matsumoto S...
    The 42th Annual Meeting of the Japan Neuroscience Society, Kobe, Japan/2018-07-26--2018-07-29
  • Spectral feature scaling method for supervised dimensionality reduction
    Matsuda M.; Morikuni K.; Sakurai T.
    Twenty-Seventh International Joint Conference on Artificial Intelligence (IJCAI-18), Stockholm, Sweden/2018-07-13--2018-07-19
  • 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 ...
    47th Numerical Analysis Symposium (2018)/2018-06-06--2018-06-08
  • Spectral Feature Scaling Method for Multiclass Classification Problems
    松田 萌望 (Matsuda M.); 保國 惠一 (Morikuni K.); 今倉 暁 ...
    47th Numerical Analysis Symposium (2018)/2018-06-06--2018-06-08
  • Verified computation of partial eigenvalues using contour integrals
    Imakura K.; Morikuni K.; Takayasu A.
    SIAM Conference on Applied Linear Algebra (SIAM-ALA18)/2018-05-04--2018-05-08
  • Contour integral methods for partial eigenproblems of linear rectangular matrix pencils
    Imakura A.; Morikuni K.; Takayasu A.
    SIAM Conference on Applied Linear Algebra (SIAM-ALA18)/2018-05-04--2018-05-08
  • Contour integral-based verified computing for partial eigenvalues
    Takayasu A.; Imakura A.; Morikuni Keiichi
    SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP18), Tokyo, Japan/2018-03-07--2018-03-10
Works
  • Implementation of AB-GMRES preconditioned by NE-SOR inner iterations
    Morikuni K.; Hayami K.
  • Implementation of BA-GMRES preconditioned by NR-SOR inner iterations
    Morikuni K.; Hayami K.
Teaching
2019-04 -- (?)Linear Algebra ACollege of Information Science
2018-04 -- 2018-08Linear Algebra ICollege of Information Science
2017-10 -- 2018-02Software and Computing Science Laboratory BUniversity of Tsukuba.
2017-10 -- 2017-12Computational Algorithm and SimulationCollege of Information Science
2017-10 -- 2018-02Research in Computer ScienceUniversity of Tsukuba.
2017-04 -- 2017-08Research in Computer ScienceUniversity of Tsukuba.
2017-10 -- 2018-02Computer Science Seminar BUniversity of Tsukuba.
2017-04 -- 2017-08Computer Science Seminar BUniversity of Tsukuba.
2017-10 -- 2018-02Computer Science Seminar AUniversity of Tsukuba.
2017-04 -- 2017-08Computer Science Seminar AUniversity of Tsukuba.
Other educational activities
2019-04 -- (current)クラス担任筑波大学
2018-04 -- (current)情報科学概論II ソフトウェアサイエンス主専攻 世話人筑波大学
2018-04 -- 2019-03情報科学概論I ソフトウェアサイエンス主専攻 世話人筑波大学
2017-04 -- 2019-03Facilitator, CS Seminar, Department of Computer ScienceUniversity of Tsukuba
Professional activities
2018-04 -- (current)The Japan Society for Industrial and Applied MathematicsEditor, JSIAM Letters
2018-04 -- (current)一般社団法人 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
2018-04 -- (current)The Japan Society for Industrial and Applied MathematicsEditor, Bulletin of the Japan Society for Industrial and Applied Mathematics
2018-06 -- 2018-06Numerical Analysis Symposium 2018Executive Committee Member
2018-03 -- 2018-03International Workshop on Eigenvalue Problems (EPASA2018)Local Chair, Organizing Committee
2017-06 -- 2017-06Numerical Analysis Symposium 2017Executive Committee Member
2016-01 -- 2016-01Workshop on Numerical Algebra, Algorithms, and AnalysisOrganizing Committee
2015-11 -- 2015-11Association for Computing Machinery (ACM) International Collegiate Programming Contest 2015 Asia Region, TsukubaExecutive Committee Member
2009-03 -- 2009-04Education Without Border 2009World Student Organizing Committee Member
University Management
2019-04 -- (current)ヒューマニクス学位プログラム学生支援委員会委員
2019-04 -- (current)CS専攻広報委員会委員
2019-04 -- (current)情報科学類カリキュラム委員会委員
2019-04 -- (current)ファカルティデベロップメント (FD) 委員会委員
2018-09 -- (current)情報科学類教育用計算機システム技術審査委員会委員
2018-04 -- (current)スポーツ・デー運営委員会委員
2015-06 -- (current)ヒューマンバイオロジー学位プログラム教務委員会委員
2016-04 -- 2018-03情報科学類計算機運用委員会委員

(Last updated: 2019-09-07)