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保國 惠一

Morikuni, Keiichi

システム情報系 , 助教
Institute of Systems and Information Engineering , Assistant Professor

https://www.u.tsukuba.ac.jp/~morikuni.keiichi.fw/

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  1. 1. Block cross-interactive residual smoothing for Lanczos-type solvers for linear systems with multiple right-hand sides Kensuke Aihara; Akira Imakura; Keiichi Morikuni
      SIAM Journal on Matrix Analysis and Applications, accepted (2025)
  2. 2. Verified eigenvalue and eigenvector computations using complex moments and the Rayleigh-Ritz procedure for generalized Hermitian eigenvalue problems Akira Imakura; Keiichi Morikuni; Akitoshi Takayasu
      Journal of Computational and Applied Mathematics 424: 1 (2023) Semantic Scholar
  3. 3. Complex moment-based methods for differential eigenvalue problems Akira Imakura; Keiichi Morikuni; Akitoshi Takayasu
      Numerical Algorithms 92: 693 (2022) Semantic Scholar
  4. 4. Cross-interactive residual smoothing for global and block Lanczos-type solvers for linear systems with multiple right-hand sides Kensuke Aihara; Akira Imakura; Keiichi Morikuni
      SIAM Journal on Matrix Analysis and Applications 43: 1308 (2022) Semantic Scholar
  5. 5. GMRES methods for tomographic reconstruction with an unmatched back projector Per Christian Hansen; Ken Hayami; Keiichi Morikuni
      Journal of Computational and Applied Mathematics 413: 1 (2022) Semantic Scholar
  6. 6. A stabilized GMRES method for singular and severely ill-conditioned systems of linear equations Zeyu Liao; Ken Hayami; Keiichi Morikuni; Jun-Feng Yin
      Japan Journal of Industrial and Applied Mathematics 39: 717 (2022) Semantic Scholar
  7. 7. Projection method for eigenvalue problems of linear nonsquare matrix pencils Keiichi Morikuni
      SIAM Journal on Matrix Analysis and Applications 42: 1381 (2021) Semantic Scholar
  8. 8. Kaczmarz-type inner-iteration preconditioned flexible GMRES methods for consistent linear systems Yi-Shu Du; Ken Hayami; Ning Zheng; Keiichi MorikuniJun-Feng Yin
      SIAM Journal on Scientific Computing 43: S345 (2021) Semantic Scholar
  9. 9. Online spectral classification for long-term spike sorting Kotaro Sakamoto; Keiichi Morikuni; Tetsuya Sakurai; Sumire MatsumotoKaspar Vogt
      Proceedings of the 5th International Conference on Medical and Health Informatics 89 (2021) Semantic Scholar
  10. 10. Multiclass spectral feature scaling method for dimensionality reduction Momo Matsuda; Keiichi Morikuni; Akira Imakura; Xiucai YeTetsuya Sakurai
      Intelligent Data Analysis 24: 1273 (2020) Semantic Scholar
  11. 11. Verified partial eigenvalue computations using contour integrals for Hermitian generalized eigenproblems Akira Imakura; Keiichi Morikuni; Akitoshi Takayasu
      Journal of Computational and Applied Mathematics 369: 1 (2019) Semantic Scholar
  12. 12. Implementation of interior-point methods for LP based on Krylov subspace iterative solvers with inner-iteration preconditioning Yiran Cui; Keiichi Morikuni; Takashi Tsuchiya; Ken Hayami
      Computational Optimization and Applications 74: 143 (2019) Semantic Scholar
  13. 13. 対称な特異線形系に対する対称な分離行列を持つ内部反復前処理 保國 惠一
      Transactions of the Japan Society for Industrial and Applied Mathematics 29: 62 (2019)
  14. 14. Spectral feature scaling method for supervised dimensionality reduction Momo Matsuda; Keiichi Morikuni; Tetsuya Sakurai
      Proceedings of the Twenty-Seventh International Joint Conference on Artificial Intelligence (IJCAI-18) 2560 (2018) Semantic Scholar
  15. 15. On GMRES for singular EP and GP systems Keiichi Morikuni; Miroslav Rozložník
      SIAM Journal on Matrix Analysis and Applications 39: 1033 (2018) Semantic Scholar
  16. 16. 特異線形方程式に対する内部反復前処理 保國 惠一
      RIMS Kokyuroku, Numerical Analysis: New Developments for Elucidating Interdisciplinary Problems II 2037: 44 (2017)
  17. 17. Multistep matrix splitting iteration preconditioning for singular linear systems Keiichi Morikuni
      Numerical Algorithms 75: 457 (2017) Semantic Scholar
  18. 18. Convergence of inner-iteration GMRES methods for rank-deficient least squares problems Keiichi Morikuni; Ken Hayami
      SIAM Journal on Matrix Analysis and Applications 36: 225 (2015) Semantic Scholar
  19. 19. FGMRES for linear discrete ill-posed problems Keiichi Morikuni; Lothar Reichel; Ken Hayami
      Applied Numerical Mathematics 75: 175 (2013) Semantic Scholar
  20. 20. Inner-iteration Preconditioning for Least Squares Problems 保國 惠一
      Ph.D. Thesis, The Graduate University for Advanced Studies (2013)
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  1. 1. 数値線形代数の数理とHPC 山本 有作; 多田野 寛人; 今倉 暁; 相島 健助; 宮田 考史; 櫻井 鉄也; 中村 佳正; 保國 惠一; 曽我部 知広; 中島 研吾; 深谷 猛; 二村 保徳; 大島 聡史 (担当:分担執筆, 範囲:第3章 最小二乗問題の数値解法, 3.2 反復法)
    共立出版 2018年8月 (ISBN: 9784320019553)

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