Morikuni Keiichi 保國惠一

Researcher Number	90765934
Other IDs
Affiliation (Current)	2025: 筑波大学, システム情報系, 助教
Affiliation (based on the past Project Information) *help	2016 – 2024: 筑波大学, システム情報系, 助教
Review Section/Research Field	Principal Investigator Basic Section 12040:Applied mathematics and statistics-related / Sections That Are Subject to Joint Review: Basic Section12030:Basic mathematics-related , Basic Section12040:Applied mathematics and statistics-related / Basic Section 12030:Basic mathematics-related / Foundations of mathematics/Applied mathematics Except Principal Investigator Basic Section 60100:Computational science-related
Keywords	Principal Investigator 精度保証 / 数値解析 / 最適化 / 数値線形代数 / 数値計算アルゴリズム / 固有値問題 / 数値代数 / 機械学習 / 行列解析 / 丸め誤差 … More / 摂動解析 / 最小二乗問題 / 射影法 / 特異性 / 非適切問題 / 線形行列束 / 数値計算 / アルゴリズム / 前処理 / 数理工学 / 次元削減 / 疎行列 / 線形方程式 / 周回積分 … More Except Principal Investigator 複素モーメント型固有値解法 / リスク回避技術 / 複素モーメント型解法 / 無限次元固有値問題 / 非線形変数変換 / 非線形変換 / 積分型固有値解法 / 固有値解析 Less

Development of a Foundation for Numerical Operator Algebras and its ApplicationsPrincipal Investigator
- Principal Investigator
  
  保國惠一
- Project Period (FY)
  2024 – 2028
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 12040:Applied mathematics and statistics-related
  Basic Section 12030:Basic mathematics-related
  Sections That Are Subject to Joint Review: Basic Section12030:Basic mathematics-related , Basic Section12040:Applied mathematics and statistics-related
- Research Institution
  University of Tsukuba
Development of complex moment-based methods and mathematical risk avoidance techniques for infinite dimensional eigenvalue problems
- Principal Investigator
  
  今倉暁
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 60100:Computational science-related
- Research Institution
  University of Tsukuba
Robust and Efficient Numerical Methods for Matrix Problems with SingularityPrincipal Investigator
- Principal Investigator
  
  保國惠一
- Project Period (FY)
  2020 – 2024
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 12040:Applied mathematics and statistics-related
- Research Institution
  University of Tsukuba
Development of eigenvalue analysis methods using a quadrature-type eigensolver with nonlinear transformations
- Principal Investigator
  
  Sakurai Tetsuya
- Project Period (FY)
  2018 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 60100:Computational science-related
- Research Institution
  University of Tsukuba
Robust and Efficient Solutions of Large Sparse Constrained EigenproblemsPrincipal Investigator
- Principal Investigator
  
  Morikuni Keiichi
- Project Period (FY)
  2016 – 2020
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Foundations of mathematics/Applied mathematics
- Research Institution
  University of Tsukuba

All 2023 2022 2021 2020 2019 2018 2017 2016

All Journal Article Presentation Book

[Book] 数値線形代数の数理とHPC2018
- Author(s)
  日本応用数理学会（監）、櫻井鉄也、松尾宇泰、片桐孝洋（編）、保國惠一ほか（分担執筆）
- Total Pages
  336
- Publisher
  共立出版
- ISBN
  9784320019553
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] Verified eigenvalue and eigenvector computations using complex moments and the Rayleigh?Ritz procedure for generalized Hermitian eigenvalue problems2023
- Author(s)
  Imakura Akira、Morikuni Keiichi、Takayasu Akitoshi
- Journal Title
  
  Journal of Computational and Applied Mathematics
  
  Volume: 424 Pages: 114994-114994
- DOI
  10.1016/j.cam.2022.114994
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19KK0255, KAKENHI-PROJECT-23K21673, KAKENHI-PROJECT-20K14356, KAKENHI-PROJECT-22K03411, KAKENHI-PROJECT-23K20813
[Journal Article] Cross-interactive residual smoothing for global and block Lanczos-type solvers for linear systems with multiple right-hand sides2022
- Author(s)
  Kensuke Aihara, Akira Imakura, Keiichi Morikuni
- Journal Title
  
  SIAM Journal on Matrix Analysis and Applications
  
  Volume: 43 Issue: 3 Pages: 1308-1330
- DOI
  10.1137/21m1436774
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K11925, KAKENHI-PROJECT-20K14356, KAKENHI-PROJECT-19KK0255, KAKENHI-PROJECT-23K21673
[Journal Article] GMRES methods for tomographic reconstruction with an unmatched back projector2022
- Author(s)
  Hansen Per Christian、Hayami Ken、Morikuni Keiichi
- Journal Title
  
  Journal of Computational and Applied Mathematics
  
  Volume: 413 Pages: 114352-114352
- DOI
  10.1016/j.cam.2022.114352
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Complex moment-based methods for differential eigenvalue problems2022
- Author(s)
  Imakura Akira、Morikuni Keiichi、Takayasu Akitoshi
- Journal Title
  
  Numerical Algorithms
  
  Volume: 92 Issue: 1 Pages: 693-721
- DOI
  10.1007/s11075-022-01456-y
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22K03411, KAKENHI-PROJECT-20K14356, KAKENHI-PROJECT-19KK0255, KAKENHI-PROJECT-18K13453, KAKENHI-PROJECT-23K20813, KAKENHI-PROJECT-23K21673
[Journal Article] A stabilized GMRES method for singular and severely ill-conditioned systems of linear equations2022
- Author(s)
  Liao Zeyu、Hayami Ken、Morikuni Keiichi、Yin Jun-Feng
- Journal Title
  
  Japan Journal of Industrial and Applied Mathematics
  
  Volume: 39 Issue: 2 Pages: 717-751
- DOI
  10.1007/s13160-022-00505-2
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Kaczmarz-Type Inner-Iteration Preconditioned Flexible GMRES Methods for Consistent Linear Systems2021
- Author(s)
  Du Yi-Shu、Hayami Ken、Zheng Ning、Morikuni Keiichi、Yin Jun-Feng
- Journal Title
  
  SIAM Journal on Scientific Computing
  
  Volume: 43 Issue: 5 Pages: S345-S366
- DOI
  10.1137/20m1344937
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Online Spectral Classification for Long-Term Spike Sorting2021
- Author(s)
  Sakamoto Kotaro、Morikuni Keiichi、Sakurai Tetsuya、Matsumoto Sumire、Vogt Kaspar
- Journal Title
  
  Proceedings of the 5th International Conference on Medical and Health Informatics
  
  Volume: - Pages: 89-97
- DOI
  10.1145/3472813.3472830
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Kaczmarz-type inner-iteration preconditioned flexible GMRES methods for consistent linear systems2021
- Author(s)
  Yi-Shu Du, Ken Hayami, Ning Zheng, Keiichi Morikuni, Jun-Feng Yin
- Journal Title
  
  SIAM Journal on Scientific Computing
  
  Volume: -
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Projection Method for Eigenvalue Problems of Linear Nonsquare Matrix Pencils2021
- Author(s)
  Morikuni Keiichi
- Journal Title
  
  SIAM Journal on Matrix Analysis and Applications
  
  Volume: 42 Issue: 3 Pages: 1381-1400
- DOI
  10.1137/20m1377886
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Online spectral classification for long-term spike sorting2021
- Author(s)
  Kotaro Sakamoto, Keiichi Morikuni, Tetsuya Sakurai, Sumire Matsumoto, Kasper Vogt
- Journal Title
  
  Proceedings of the third International Conference on Medical and Health Informatics 2021
  
  Volume: -
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K14356
[Journal Article] Verified partial eigenvalue computations using contour integrals for Hermitian generalized eigenproblems2020
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Journal Title
  
  Journal of Computational and Applied Mathematics
  
  Volume: 369 Pages: 112543-112543
- DOI
  10.1016/j.cam.2019.112543
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-17K12690, KAKENHI-PROJECT-18K13453, KAKENHI-PROJECT-16K17639
[Journal Article] Scalable Eigen-analysis engine for large-scale eigenvalue problems.2019
- Author(s)
  T. Sakurai, Y. Futamura, A. Imakura, T. Imamura
- Journal Title
  
  Advanced Software Technologies for Post-Peta Scale Computing
  
  Volume: 24 Issue: 6 Pages: 37-57
- DOI
  10.3233/ida-194942
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18H03250, KAKENHI-PROJECT-16K17639
[Journal Article] Inner-iteration Preconditioning with Symmetric Splitting Matrices for Symmetric Singular Linear Systems2019
- Author(s)
  保國惠一
- Journal Title
  
  Transactions of the Japan Society for Industrial and Applied Mathematics
  
  Volume: 29 Issue: 1 Pages: 62-77
- DOI
  10.11540/jsiamt.29.1_62
- NAID
  130007618981
- ISSN
  2424-0982
- Language
  Japanese
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] Implementation of interior-point methods for LP based on Krylov subspace iterative solvers with inner-iteration preconditioning2019
- Author(s)
  Yiran Cui、Keiichi Morikuni、Takashi Tsuchiya、Ken Hayami
- Journal Title
  
  Computational Optimization and Applications
  
  Volume: 74 Issue: 1 Pages: 143-176
- DOI
  10.1007/s10589-019-00103-y
- NAID
  120007133179
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] Spectral Feature Scaling Method for Supervised Dimensionality Reduction2018
- Author(s)
  Matsuda Momo、Morikuni Keiichi、Sakurai Tetsuya
- Journal Title
  
  Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence
  
  Volume: IJCAI-18 Pages: 2560-2566
- DOI
  10.24963/ijcai.2018/355
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] 高次元データのスペクトラルクラス分類における特徴量スケーリング2018
- Author(s)
  松田萌望、保國惠一、今倉暁、櫻井鉄也
- Journal Title
  
  信学技報, IBISML2018-2
  
  Volume: 118巻 no81 Pages: 9-14
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18H03250
[Journal Article] On GMRES for Singular EP and GP Systems2018
- Author(s)
  Morikuni Keiichi、Rozloznik Miroslav
- Journal Title
  
  SIAM Journal on Matrix Analysis and Applications
  
  Volume: 39 Issue: 2 Pages: 1033-1048
- DOI
  10.1137/17m1128216
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] Spectral feature scaling method for supervised dimensionality reduction2018
- Author(s)
  Matsuda, Momo, Morikuni, Keiichi, Sakurai, Tetsuya
- Journal Title
  
  Twenty-Seventh International Joint Conference on Artificial Intelligence
  
  Volume: 1巻 Pages: 2560-2566
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18H03250
[Journal Article] Multistep matrix splitting iteration preconditioning for singular linear systems2017
- Author(s)
  Keiichi Morikuni
- Journal Title
  
  Numerical Algorithms
  
  Volume: 75 Issue: 2 Pages: 457-475
- DOI
  10.1007/s11075-017-0330-0
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K17639
[Journal Article] 特異線形方程式に対する内部反復前処理2017
- Author(s)
  保國惠一
- Journal Title
  
  数理解析研究所講究録現象解明に向けた数値解析学の新展開II
  
  Volume: 2037 Pages: 44-51
- Open Access
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Cross-interactive residual smoothing for block Lanczos-type methods for solving linear systems with multiple right-hand sides2023
- Author(s)
  Kensuke Aihara, Akira Imakura, Keiichi Morikuni
- Organizer
  10th International Congress on Industrial and Applied Mathematics (ICIAM2023)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 微分作用素の固有値に対する複素モーメントを用いた精度保証付き数値計算2023
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  2023年並列／分散／協調処理に関するサマー・ワークショップ（SWoPP 2023）, 第35回「行列・固有値問題の解法とその応用」研究部会単独研究会
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] ブロックLanczos型反復法の精度改善に向けた相互作用型残差スムージング2023
- Author(s)
  相原研輔，今倉暁，保國惠一
- Organizer
  日本応用数理学会 2023年研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 離散最適輸送問題に対するBregmanダイバージェンス正則化の誤差評価2023
- Author(s)
  保國惠一, 榊原航也, 高津飛鳥
- Organizer
  日本応用数理学会第19回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] CGS 系統のブロッククリロフ部分空間法の枠組み2023
- Author(s)
  今倉暁, 相原研輔, 保國惠一
- Organizer
  第４９回数値解析シンポジウム（NAS2023）
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 自己共役な微分作用素の固有値に対する周回積分型精度保証付き数値解法2023
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  第４９回数値解析シンポジウム（NAS2023）
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] ブロックLanczos型反復法の精度改善に向けた相互作用型残差スムージング2023
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  日本応用数理学会第19回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] A projection method for singular eigenvalue problems of linear matrix pencils2023
- Author(s)
  Keiichi Morikuni, Akira Imakura
- Organizer
  10th International Congress on Industrial and Applied Mathematics (ICIAM2023)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 相互作用型残差スムージングにおける近似解ノルムの影響について2023
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  日本応用数理学会第20回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 線形非正方行列束の固有値問題に対する射影法2022
- Author(s)
  保國惠一, 今倉暁
- Organizer
  RIMS研究集会「数値解析が拓く次世代情報社会～エッジから富岳まで～」
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 後退安定な直交化を用いたブロックLanczos解法の残差ギャップについて2022
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  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34回単独研究会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 無限次元固有値問題に対する複素モーメント型解法とその性能評価2022
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  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34回単独研究会
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] 一般化エルミート固有値問題に対するRayleigh-Ritz版の周回積分型精度保証付き部分固有対計算2022
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  日本応用数理学会 2022年度年会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 線形非正方行列束の固有値問題に対する射影法2022
- Author(s)
  保國惠一, 今倉暁
- Organizer
  数値解析が拓く次世代情報社会～エッジから富岳まで～
- Invited
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] A projection method for eigenvalue problems of linear nonsquare matrix pencils2022
- Author(s)
  Keiichi Morikuni
- Organizer
  Functional Analysis, Approximation Theory and Numerical Analysis
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] GMRES methods for tomographic reconstruction with an unmatched back projector2022
- Author(s)
  Ken Hayami, Per Christian Hansen, Keiichi Morikuni
- Organizer
  日本応用数理学会第18回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 一般化エルミート固有値問題に対するRayleigh-Ritz版の周回積分型精度保証付き部分固有対計算2022
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  日本応用数理学会 2022年度年会
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] GMRES methods for tomographic reconstruction with an unmatched back projector2021
- Author(s)
  Per Christian Hansen, Ken Hayami, Keiichi Morikuni
- Organizer
  Numerical Methods and Scientific Computing (NMSC21)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Verifying eigenvalues of generalized Hermitian eigenproblems using contour integrals2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 無限次元固有値問題に対する複素モーメント型解法2021
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  2021年並列／分散／協調処理に関するサマー・ワークショップ (SWoPP2021)
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 無限次元固有値問題に対する複素モーメント型解法2021
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  2021年並列／分散／協調処理に関するサマー・ワークショップ (SWoPP2021)
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] Complex Moment-Based Methods for Differential Eigenvalue Problems2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  SIAM Conference on Applied Linear Algebra (SIAM-LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] Unmatched Projector/Backprojector Pairs and Algebraic Iterative Reconstruction2021
- Author(s)
  Per Christian Hansen, Yi-Qiu Dong, Tommy Elfving, Ken Hayami, Michiel E. Hochstenbach, Keiichi Morikuni, Nicolai A. B. Riis
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Invited
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Analysis of the stabilized GMRES method2021
- Author(s)
  Ken Hayami, Zeyu Liao, Keiichi Morikuni, Jun-Feng Yin
- Organizer
  日本応用数理学会2021年度年会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Projection method for eigenproblems of linear nonsquare matrix pencils2021
- Author(s)
  保國惠一
- Organizer
  日本応用数理学会2021年度年会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 複数右辺ベクトルを持つ線形方程式に対するblock generalized CGS法2021
- Author(s)
  今倉暁, 相原研輔, 保國惠一
- Organizer
  複数右辺ベクトルを持つ線形方程式に対するblock generalized CGS法
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Complex Moment-Based Methods for Differential Eigenvalue Problems2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  SIAM Conference on Applied Linear Algebra (LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Implementation of interior-point methods for LP using Krylov methods preconditioned by inner iterations2021
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, Ken Hayami
- Organizer
  Workshop on Continuous Optimization and Related Topics
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] On the Residual Gap of Block Lanczos-Type Methods and Its Remedy by Cross-Interactive Residual Smoothing2021
- Author(s)
  Kensuke Aihara, Akira Imakura, Keiichi Morikuni
- Organizer
  SIAM Conference on Applied Linear Algebra (SIAM-LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H03250
[Presentation] Kaczmarz-Type Inner-Iteration Preconditioned Flexible GMRES Methods for Consistent Linear Systems2021
- Author(s)
  Yi-Shu Du, Ken Hayami, Ning Zheng, Keiichi Morikuni, Jun-Feng Yin
- Organizer
  SIAM Conference on Applied Linear Algebra (LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Normal equations can be more stable than equations2021
- Author(s)
  Ken Hayami, Zeyu Liao, Keiichi Morikuni, Jun-Feng Yin
- Organizer
  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32回単独研究会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Verifying eigenvalues of generalized Hermitian eigenproblems using contour integrals2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Kaczmarz-type inner-iteration preconditioned flexible GMRES methods for consistent linear systems2021
- Author(s)
  Yi-Shu Du、Ken Hayami、Ning Zheng、Keiichi Morikuni、Jun-Feng Yin
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Invited
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] GMRES methods for tomographic reconstruction with an unmatched back projector2021
- Author(s)
  Per Christian Hansen, Ken Hayami, Keiichi Morikuni
- Organizer
  第36回信号処理シンポジウム
- Invited
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Sylvester方程式に対するglobal Krylov部分空間法のresidual gap評価とその改善2021
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  日本応用数理学会第17回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Eigensolvers using complex moments for operators2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  Numerical Methods and Scientific Computing (NMSC21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] GMRES Methods for Tomographic Reconstruction with an Unmatched Back Projector2021
- Author(s)
  Per Christian Hansen, Ken Hayami, and Keiichi Morikuni
- Organizer
  SIAM Conference on Applied Linear Algebra (LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Eigensolvers using complex moments for operators2021
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akitoshi Takayasu
- Organizer
  Numerical Methods and Scientific Computing (NMSC21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K21673
[Presentation] Sylvester方程式に対するglobal Krylov部分空間法のresidual gap評価とその改善2021
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  日本応用数理学会第17回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] On the Residual Gap of Block Lanczos-Type Methods and Its Remedy by Cross-Interactive Residual Smoothing2021
- Author(s)
  Kensuke Aihara, Akira Imakura, and Keiichi Morikuni
- Organizer
  SIAM Conference on Applied Linear Algebra (LA21)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Kaczmarz-type inner-iteration preconditioned flexible GMRES methods for consistent linear systems2021
- Author(s)
  Yi-Shu Du, Ken Hayami, Ning Zheng, Keiichi Morikuni, Jun-Feng Yin
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Invited
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 複数右辺ベクトルを持つ線形方程式に対するblock generalized CGS法2021
- Author(s)
  今倉暁, 相原研輔, 保國惠一
- Organizer
  日本応用数理学会第17回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Normal equations can be more stable than equations2021
- Author(s)
  Ken Hayami, Zeyu Liao, Keiichi Morikuni, Jun-Feng Yin
- Organizer
  Numerical Methods and Scientific Computing (NMSC21)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Implementation of interior-point methods for LP based on Krylov subspace iterative solvers with inner-iteration preconditioning2021
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, and Ken Hayami
- Organizer
  The 22nd Conference of the International Federation of Operational Research Societies (IFORS 2021)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] Implementation of interior-point methods for LP based on Krylov subspace iterative solvers with inner-iteration preconditioning2021
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, Ken Hayami
- Organizer
  Second Workshop on Numerical Algebra, Algorithms and Analysis
- Invited
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] 漸化式に着目したblock Krylov部分空間法のresidual gap評価と残差スムージング2020
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  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30回研究会
- Data Source
  KAKENHI-PROJECT-20K14356
[Presentation] エルミート行列レゾルベントの二次形式に対するシフト付きランチョス法2020
- Author(s)
  保國惠一
- Organizer
  日本応用数理学会 2020年研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 漸化式に着目したblock Krylov部分空間法のresidual gap評価と残差スムージング2020
- Author(s)
  相原研輔, 今倉暁, 保國惠一
- Organizer
  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30回研究会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Numerical behavior of GMRES for singular systems2019
- Author(s)
  Miroslav Rozloznik, Keiichi Morikuni
- Organizer
  90th GAMM Annual Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 対称行列レゾルベントの双線形形式に対するshifted Lanczos法2019
- Author(s)
  保國惠一
- Organizer
  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28回研究会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] On GMRES for linear EP and GP systems2019
- Author(s)
  Miroslav Rozloznik、Keiichi Morikuni
- Organizer
  International Congress on Industrial and Applied Mathematics (ICIAM2019)
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2019
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  日本応用数理学会第15回研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Time series motif discovery in matrix profiles via low-rank approximation2019
- Author(s)
  保國惠一
- Organizer
  日本応用数理学会 2019年度年会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Feature scaling method for supervised spectral clustering2018
- Author(s)
  Momo Matsuda, Keiichi Morikuni, and Tetsuya Sakurai
- Organizer
  SIAM Conference on Parallel Processing for Scientific Computing
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Feature scaling method for spectral classification2018
- Author(s)
  Momo Matsuda, Keiichi Morikuni, and Tetsuya Sakurai
- Organizer
  International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] On GMRES for singular EP and GP systems2018
- Author(s)
  Keiichi Morikuni and Miroslav Rozloznik
- Organizer
  89th GAMM Annual Meeting
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Implementation of Interior-point Methods for LP without a Direct Linear Equation Solver2018
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuhiya, Ken Hayami
- Organizer
  The 3rd IMI-ISM-ZIB MODAL Workshop on Challenging in Real World Data Analytics and High-Performance Optimization
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Verified Partial Eigenvalue Computation for Generalized Hermitian Eigenproblems Using Contour Integrals2018
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  第47回数値解析シンポジウム
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Contour integral methods for partial eigenproblems of linear rectangular matrix pencils2018
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akira Takayasu
- Organizer
  SIAM Conference on Applied Linear Algebra
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2018
- Author(s)
  松田萌望, 保國惠一, 今倉暁, 櫻井鉄也
- Organizer
  第47回数値解析シンポジウム
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 高次元データのスペクトラルクラス分類における特徴量スケーリング2018
- Author(s)
  松田萌望, 保國惠一, 今倉暁, 櫻井鉄也
- Organizer
  第33回情報論的学習理論と機械学習研究会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Verified computing for partial eigenvalues using a contour integral-type eigensolver2018
- Author(s)
  Akitoshi Takayasu, Akira Imakura, Keiichi Morikuni
- Organizer
  18th International Symposium on Scientific Computing, Computer Arithmetic, and Verified Numerical Computations
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 線形行列束の部分固有値問題に対する周回積分法2018
- Author(s)
  保國惠一
- Organizer
  岩手数理科学セミナー
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2018
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  日本応用数理学会2018年度年会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] On-line EM algorithm for long-term tracking of neural activity in a mouse2018
- Author(s)
  Keiichi Morikuni, Kaoru Ohyama, Sumire Matsumoto, Momo Matsuda, Masashi Yanagisawa, Robby W. Greene, Kaspar E. Vogt, and Tetsuya Sakurai
- Organizer
  International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2018
- Author(s)
  保國惠一, Miroslav Rozloznik
- Organizer
  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
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 特徴量スケーリングを用いたスペクトラルクラス分類2018
- Author(s)
  松田萌望, 保國惠一, 櫻井鉄也
- Organizer
  第14回日本応用数理学会研究部会連合発表会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] GMRES method for singular EP and GP linear systems2018
- Author(s)
  Keiichi Morikuni, Miroslav Rozloznik
- Organizer
  The Seventh China-Japan-Korea Joint Conference on Numerical Mathematics
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2018
- Author(s)
  松田萌望, 保國惠一, 今倉暁, 櫻井鉄也
- Organizer
  日本応用数理学会2018年度年会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Spectral Feature Scaling Method for Supervised Dimensionality Reduction2018
- Author(s)
  Momo Matsuda, Keiichi Morikuni, Tetsuya Sakurai
- Organizer
  Twenty-Seventh International Joint Conference on Artificial Intelligence
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] On GMRES for linear EP and GP systems2018
- Author(s)
  Keiichi Morikuni, Miroslav Rozloznik
- Organizer
  GAMM Applied Numerical Linear Algebra Workshop
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Verified computation of partial eigenvalues using contour integrals2018
- Author(s)
  Akira Imakura, Keiichi Morikuni, Akira Takayasu
- Organizer
  SIAM Conference on Applied Linear Algebra
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2018
- Author(s)
  松田萌望, 保國惠一, 今倉暁, 櫻井鉄也
- Organizer
  日本応用数理学会2018年度年会
- Data Source
  KAKENHI-PROJECT-18H03250
[Presentation] 特異線形方程式に対する一般化最小残差法2017
- Author(s)
  保國惠一
- Organizer
  第46回数値解析シンポジウム
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Contour integral methods for rectangular eigenproblems2017
- Author(s)
  Keiichi Morikuni
- Organizer
  21st Conference of the International Linear Algebra Society
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] GMRES method for singular linear systems2017
- Author(s)
  保國惠一
- Organizer
  Workshop on Numerical Methods for Matrix Computations
- Place of Presentation
  名古屋大学 (愛知県名古屋市)
- Year and Date
  2017-01-20
- Invited
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2017
- Author(s)
  松田萌望, 保國惠一, 櫻井鉄也
- Organizer
  日本応用数理学会 2017年度年会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2017
- Author(s)
  松田萌望, 保國惠一, 櫻井鉄也
- Organizer
  日本応用数理学会第13回研究部会連合発表会
- Place of Presentation
  電気通信大学（東京都調布市）
- Year and Date
  2017-03-06
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Inner-iteration preconditioning for singular linear systems2017
- Author(s)
  Keiichi Morikuni
- Organizer
  Householder Symposium XX on Numerical Linear Algebra
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2017
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  日本応用数理学会 2017年度年会
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 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2017
- Author(s)
  松田萌望，保國惠一，櫻井鉄也
- Organizer
  第46回数値解析シンポジウム
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 実対称行列に対する周回積分を用いた精度保証付き部分固有値計算2017
- Author(s)
  今倉暁, 保國惠一, 高安亮紀
- Organizer
  第46回数値解析シンポジウム
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 高次元特徴量に対するスケーリング法と教師付きスペクトラルクラスタリング2017
- Author(s)
  松田萌望, 保國惠一, 櫻井鉄也
- Organizer
  第20回情報論的学習理論ワークショップ
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Inner-Iteration Preconditioning for the Minimum-Norm Solutions to Least Squares Problems2017
- Author(s)
  Keiichi Morikuni
- Organizer
  SIAM Conference on Computational Science and Engineering
- Place of Presentation
  Hilton Atlanta (Atlanta, United States)
- Year and Date
  2017-03-03
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Implementation of Interior-point Methods for LP using Krylov Subspace Methods Preconditioned by Inner Iterations2016
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, and Ken Hayami
- Organizer
  The Fifth International Conference on Continuous Optimization of the Mathematical Optimization Society
- Place of Presentation
  政策研究大学院大学（東京都港区）
- Year and Date
  2016-08-08
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 長方行列束の固有値問題に対するレイリー・リッツ版周回積分型固有値解法2016
- Author(s)
  保國惠一
- Organizer
  第45回数値解析シンポジウム
- Place of Presentation
  霧島ホテル（鹿児島霧島市）
- Year and Date
  2016-06-08
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Implementation of Interior-point Methods for LP using Krylov Subspace Methods Preconditioned by Inner Iterations2016
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, and Ken Hayami
- Organizer
  Workshop on Advances in Optimization
- Place of Presentation
  TKP品川カンファレンスセンター（東京都港区）
- Year and Date
  2016-08-13
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 最小二乗問題に対する内部反復前処理とその応用2016
- Author(s)
  保國惠一
- Organizer
  数値解析セミナー
- Place of Presentation
  東京大学（東京都目黒区）
- Year and Date
  2016-05-23
- Invited
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 特異線形方程式に対する内部反復前処理2016
- Author(s)
  保國惠一
- Organizer
  RIMS研究集会現象解明に向けた数値解析学の新展開II
- Place of Presentation
  京都大学数理解析研究所（京都府京都市）
- Year and Date
  2016-10-21
- Invited
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] 長方行列束の固有値問題に対する周回積分型解法2016
- Author(s)
  保國惠一
- Organizer
  日本応用数理学会2016年度年会
- Place of Presentation
  北九州国際会議場（福岡県北九州市）
- Year and Date
  2016-09-13
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Application of inner-iteration preconditioning to general least squares problems2016
- Author(s)
  Keiichi Morikuni
- Organizer
  20th Conference of the International Linear Algebra Society
- Place of Presentation
  KU Leuven (Leuven, Belgium)
- Year and Date
  2016-07-15
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639
[Presentation] Implementation of Interior-point Methods for LP Based on Krylov Subspace Iterative Solvers with Inner-Iteration Preconditioning2016
- Author(s)
  Yiran Cui, Keiichi Morikuni, Takashi Tsuchiya, and Ken Hayami
- Organizer
  5th IMA Conference on Numerical Linear Algebra and Optimization
- Place of Presentation
  University of Birmingham (Birmingham, UK)
- Year and Date
  2016-09-07
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17639

1. 今倉暁 (60610045)

# of Collaborated Projects: 3 results

# of Collaborated Products: 19 results
2. Sakurai Tetsuya (60187086)

# of Collaborated Projects: 2 results

# of Collaborated Products: 4 results
3. 高安亮紀 (60707743)

# of Collaborated Projects: 2 results

# of Collaborated Products: 8 results
4. 二村保徳 (30736210)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
5. 相原研輔 (70735498)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results

Morikuni Keiichi 保國 惠一

Research Projects

Research Products

Co-Researchers

Development of a Foundation for Numerical Operator Algebras and its ApplicationsPrincipal Investigator

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Development of complex moment-based methods and mathematical risk avoidance techniques for infinite dimensional eigenvalue problems

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Robust and Efficient Numerical Methods for Matrix Problems with SingularityPrincipal Investigator

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Development of eigenvalue analysis methods using a quadrature-type eigensolver with nonlinear transformations

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Robust and Efficient Solutions of Large Sparse Constrained EigenproblemsPrincipal Investigator

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[Book] 数値線形代数の数理とHPC2018

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[Journal Article] Verified eigenvalue and eigenvector computations using complex moments and the Rayleigh?Ritz procedure for generalized Hermitian eigenvalue problems2023

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[Journal Article] Cross-interactive residual smoothing for global and block Lanczos-type solvers for linear systems with multiple right-hand sides2022

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[Journal Article] GMRES methods for tomographic reconstruction with an unmatched back projector2022

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[Journal Article] Complex moment-based methods for differential eigenvalue problems2022

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[Journal Article] A stabilized GMRES method for singular and severely ill-conditioned systems of linear equations2022

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[Journal Article] Kaczmarz-Type Inner-Iteration Preconditioned Flexible GMRES Methods for Consistent Linear Systems2021

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[Journal Article] Online Spectral Classification for Long-Term Spike Sorting2021

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[Journal Article] Kaczmarz-type inner-iteration preconditioned flexible GMRES methods for consistent linear systems2021

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[Journal Article] Projection Method for Eigenvalue Problems of Linear Nonsquare Matrix Pencils2021

Morikuni Keiichi 保國惠一