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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
Contour integral-type anti-perturbation eigensolvers for rectangular matrix pencils2017-10 -- 2018-09Morikuni, K.The Hattori Hokokai Foundation, Public Interest Incorporated Foundation/Grant-in-Aid for Engineering Research1000000
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500000
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 -- 2017-03Akira Imakura筑波大学/システム情報系若手融合研究プロジェクト300000
Robust and efficient solutions of large sparse constrained eigenvalue problems2016-04 -- 2020-03Morikuni, K.Japan Society for the Promotion of Sciences/Grant-in-Aid for Young Scientists (B), Grants-in-Aid for Scientific Research4030000
Design and analysis of solution methods for large-scale least squares problems2010-06 -- 2010-07Keiichi MorikuniThe Graduate University for Advanced Studies/Sokendai Short-stay Study Abroad Program 2010400000
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
2008-03Bachelor of DesignKyushu University
2013-03Doctor of PhilosophyThe Graduate University for Advanced Studies
Academic societies
2014 -- 2014Information Processing Society of Japan
2008 -- 2013Acoustical Society of Japan
2013 -- (current)ILAS (International Linear Algebra Society)
2008 -- (current)The Japan Society for Industrial and Applied Mathematics (JSIAM)
2012 -- (current)SIAM (Society for Industrial and Applied Mathematics)
Honors & Awards
2017-09日本応用数理学会2017年度 年会 最優秀ポスター賞 (Best Poster Prize, Japan SIAM Annual Meeting 2007)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)
2017-06日本応用数理学会2016年度年会 若手優秀講演賞 (Excellent Young Presentation Prize), Japan SIAM Annual Meeting 2016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
  • 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
  • Multistep matrix splitting iteration preconditioning for singular linear systems
    Morikuni K.
    arXiv:1705.03153 [math.NA], 2017-05
  • 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
  • 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
  • Inner-iteration preconditioning for singular linear systems
    Morikuni K.
    Program and Abstracts, Householder Symposium XX on Numerical Linear Algebra/pp.230-232, 2017-06
  • 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
  • On GMRES for singular EP and GP systems
    Morikuni K.; Rozložník M.
    arXiv/1705.03153 [math.NA] /pp.1-15, 2017-05
  • Multistep matrix splitting iteration preconditioning for singular linear systems
    Morikuni K.
    Numerical Algorithms/75(2:::SI)/pp.457-475, 2017-05
  • 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
  • Inner-iteration preconditioning for singular linear systems
    Morikuni Keiichi
    arXiv:1504.01713v2 [math.NA], 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
  • Inner-iteration preconditioning for singular linear systems
    Morikuni K. (保國 惠一)
    Book of Abstracts, 44th Numerical Analysis Symposium/pp.57-60, 2015-06
  • Inner-iteration preconditioning for singular linear systems
    Morikuni K.
    arXiv:1504.01713 [math.NA]/arXiv:1504.01713 [math.NA]/pp.1-13, 2015-04
  • Symmetric inner-iteration preconditioning for rank-deficient least squares problems
    Morikuni K.
    arXiv:1504.00889 [math.NA]/arXiv:1504.00889 [math.NA]/pp.1-15, 2015-04
  • Convergence of inner-iteration GMRES methods for rank-deficient least squares problems
    Morikuni K.; Hayami K.
    SIAM Journal on Matrix Analysis and Applications/36(1)/pp.225-250, 2015-03
  • チェコ科学アカデミー 計算機科学研究所の紹介
    保國 惠一
    JSIAM Online Magazine/D1406A, 2014-07
  • FGMRES for linear discrete ill-posed problems
    Morikuni K.; Reichel L.; Hayami K.
    Applied Numerical Mathematics, Special Issue of 10th IMACS (International Association for Mathematics and Computers in Simulation) International Symposium on Iterative Methods in Scientific Computing/75/pp.175-187, 2014-01
  • Convergence of Inner-iteration GMRES Methods for Least Squares Problems (Revised Version)
    Morikuni K. (保國 惠一); Hayami K. (速水 謙)
    NII Technical Report, National Institute of Informatics/NII-2013-004E/pp.1-24, 2013-12
  • 2013 SIAM Annual Meeting
    保國 惠一
    JSIAM Online Magazine/G1307E, 2013-09
  • 大規模最小二乗問題の高速解法
    保國 惠一、速水 謙
    分子ロボティクスNews Letter/3/p.13, 2013-08
  • Inner-iteration Krylov subspace methods for least squares problems
    Morikuni K.; Hayami K.
    SIAM Journal on Matrix Analysis and Applications/34(1)/pp.1-22, 2013-01
  • 最小二乗問題に対する内部反復前処理
    保國 惠一 速水 謙
    数理解析研究所講究録 科学技術計算における理論と応用の新展開/1791/pp.21-30, 2012-04
Books
  • Inner-iteration Preconditioning for Least Squares Problems
    保國 惠一
    2013
Conference, etc.
  • Multistep matrix splitting preconditioning for singular linear systems
    Morikuni K. (保國 惠一)
    Poster Workshop 2017: TIA-Kakehashi "Experimental data analysis coordinated with computational science"/2017-09-12--2017-09-12
  • 特徴量スケーリングを用いた教師ありスペクトラルクラスタリング
    松田 萌望; 保國 惠一; 櫻井 鉄也
    日本応用数理学会 2017年度 年会/2017-09-06--2017-09-08
  • 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
    今倉 暁; 保國 惠一; 高安 亮紀
    日本応用数理学会 2017年度 年会/2017-09-06--2017-09-08
  • Contour integral methods for rectangular eigenproblems
    Morikuni K
    21st Conference of the International Linear Algebra Society/2017-07-24--2017-07-28
  • 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...
    46th Numerical Analysis Symposium (NAS2017)/2017-06-28--2017-06-30
  • Supervised spectral clustering using feature scaling
    Matsuda M. (松田 萌望); Morikuni K. (保國 惠一); Sakurai ...
    46th Numerical Analysis Symposium (NAS2017)/2017-06-28--2017-06-30
  • GMRES method for singular linear systems
    Morikuni K. (保國 惠一)
    46th Numerical Analysis Symposium/2017-06-28--2017-06-30
  • Inner-iteration preconditioning for singular linear systems
    Morikuni K.
    Householder Symposium XX on Numerical Linear Algebra/2017-06-19--2017-06-23
  • スペクトラルクラスタリングにおける特徴量スケーリング
    松田 萌望; 保國 惠一; 櫻井 鉄也
    日本応用数理学会 第13回 研究部会連合発表会 「行列・固有値問題の解法とその応用」研究部会セッション/2017-03-06--2017-03-07
  • Inner-Iteration Preconditioning for the Minimum-Norm Solutions to Least Squares Problems
    Morikuni K. (保國 惠一)
    MS33 Sparse Least Squares SIAM Conference on Computational Science and Engineering/2017-02-27--2017-03-03
  • GMRES method for singular linear systems
    Morikuni K. (保國 惠一)
    Workshop on Numerical Methods for Matrix Computations (NMMC2017)/2017-01-19--2017-01-20
  • 特異線形方程式に対する内部反復前処理
    保國 惠一
    RIMS研究集会 現象解明に向けた数値解析学の新展開II/2016-10-19--2016-10-21
  • Contour integral-type solution of eigenvalue problems of rectangular matrix pencils
    Morikuni K. (保國 惠一)
    OS Algorithms for Matrix/Eigenvalue Problems and their Applications (3), JSIAM Annual Meeting 2016/2016-09-11--2016-09-13
  • 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.
    5th IMA Conference on Numerical Linear Algebra and Optimization, Birmingham, UK/2016-09-07--2016-09-09
  • Implementation of Interior-point Methods for LP using Krylov Subspace Methods Preconditioned by Inner Iterations
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    Workshop on Advances in Optimization (WAO)/2016-08-12--2016-08-13
  • Implementation of Interior-point Methods for LP using Krylov Subspace Methods Preconditioned by Inner Iterations
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    Various Aspects of Conic Optimization and Mathematical Modeling Systems Session, The Fifth International Conference on Continuous Optimization (ICCOPT), Tokyo, Japan/2016-08-08--2016-08-11
  • Application of inner-iteration preconditioning to general least squares problems
    Morikuni K.
    Recent Advances in the Solution of Least Squares Problems, 20th Conference of the International Linear Algebra Society (ILAS)/2016-07-11--2016-07-15
  • Rayleigh-Ritz-type contour integral-based eigensolvers for eigenvalue problems of rectangular matrix pencils
    Morikuni K. (保國 惠一)
    45th Numerical Analysis Symposium (NAS2016)/2016-06-08--2016-06-10
  • Inner-iteration preconditioning for least squares problems and its applications
    Morikuni K. (保國 惠一)
    Numerical Analysis Seminar at The University of Tokyo (UTNAS)/2016-05-23--2016-05-23
  • Implementation of interior-point method for LP based on Krylov subspace iterative solver with inner-iteration preconditioning
    Cui Yiran; Morikuni K. (保國 惠一); Tsuchiya T. (土谷 隆)...
    Workshop "Optimization: Modelling and Algorithms", Tokyo, Japan/2016-03-22
  • Inner-iteration Preconditioning of Normal Equations in an Interior-point Method for LP
    Cui Y.; Morikuni K.; Tsuchiya T.; Hayami K.
    Solution of Matrix and Eigenvalue Problems and Applications, 12th Joint Meeting of JSIAM, Kobe/2016-03-04
  • 周回積分型固有値解法を用いた半教師付きスペクトラルクラスタリングと画像領域分割への適用
    上田 隼也; 櫻井 鉄也; 保國 惠一
    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20回研究部会/2015-12-11--2015-12-11
  • 制約付き固有値問題を用いた半教師付きスペクトラルクラスタリングによる画像領域分割
    上田 隼也; 櫻井 鉄也; 保國 惠一
    第18回情報論的学習理論ワークショップ/2015-11-25--2015-11-28
  • 周回積分型固有値解法による半教師付きスペクトラルクラスタリングの画像処理への適用
    上田 隼也; 櫻井 鉄也; 保國 惠一
    第10回協定講座シンポジウム 計算科学 次代を担う若手の集い 2015, 神戸/2015-11-01
  • Symmetric inner-iteration preconditioning for rank-deficient least squares problems
    Morikuni K.
    SIAM Conference on Applied Linear Algebra, Atlanta, United States/2015-10-29
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
2017-10 -- 2018-02Software and Computing Science Laboratory BUniversity of Tsukuba.
2017-10 -- 2017-12Computational Algorithm and SimulationUniversity of Tsukuba.
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.
2017-10 -- 2018-02Seminar in Computer ScienceUniversity of Tsukuba.
2017-04 -- 2017-08Seminar in Computer ScienceUniversity of Tsukuba.
Professional activities
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
2017-04 -- (current)コンピュータサイエンス専攻 CSセミナー委員
2016-04 -- (current)情報科学類計算機運用委員会委員
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

(Last updated: 2017-10-06)