Hayami Ken

ハヤミケン | Hayami Ken

Affiliation and department：
Other affiliations (1)：

The Graduate University for Advanced Studies (SOKENDAI)

Homepage URL (2)： http://research.nii.ac.jp/~hayami/index-j.html , http://research.nii.ac.jp/~hayami/index-e.html

Research field (2)： Computational science , Applied mathematics and statistics

Research keywords (11)： singular systems , inverse problems , iterative methods , preconditioning , Krylov subspace methods , system of linear equations , least squares problems , numerical linear algebra , numerical compuation , numerical analysis , mathematical engineering

Research theme for competitive and other funds (17)：

2019 - 2022 The development of a virtual clinical experiment system considering the variation of governing causes of the transportation of drugs among organisms, drug effect, and side effects.
2015 - 2018 The Deepening and New Developments in Mathematical Modelling of Linear Programming on Convex Cones
2015 - 2018 Fast Solution Methods for Least Squares Problems and their Applications
2012 - 2017 Design and Implementation of Chemical Reaction Circuits for Molecular Robots with Intelligence
2012 - 2014 The Iterative Solution of Least Squares Problems and its Application to Inverse Problems

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Papers (42)：

Kota Sugihara, Ken Hayami, Liao Zeyu. GMRES using pseudoinverse for range symmetric singular systems. Journal of Computational and Applied Mathematics. 2023. 422. 114865-114865
Hansen, P.C, Hayami, K, Morikuni, K. GMRES Methods for Tomographic Reconstruction with an Unmatched Back Projector. Journal of Computational and Applied Mathematics (in press). 2022. 413. 1-20
Liao, Z, Hayami, K, Morikuni, K, Yin, J.-F. A stabilized GMRES method for singular and severely ill-conditioned systems of linear equations. Japan Journal of Industrial and Applied Mathematics. 2022. 39. 717-751
Yi-Shu Du, Ken Hayami, Ning Zheng, Keiichi Morikuni, Jun-Feng Yin. Kaczmarz-Type Inner-Iteration Preconditioned Flexible GMRES Methods for Consistent Linear Systems. SIAM Journal on Scientific Computing. 2021. S345-S366
Hayami, K, Sugihara, K. Corrigendum 2 to: A geometric view of Krylov subspace methods on singular systems. Numerical Linear Algebra with Applications. 2021. 28. 1-7

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MISC (145)：

Kota Sugihara, Ken Hayami. Right preconditioned GMRES for arbitrary singular systems. arXiv、Mathematics, Numerical Analysis. 2023. 1-25
速水謙. 言葉としての数理. 応用数理. 2023. 33. 3. 1-1
Sugihara, K, Hayami, K, Liao, Z. GMRES using pseudo-inverse for range symmetric singular systems. arXiv, Mathematics, Numerical Analysis. 2022. 1-15
Hansen, P.C, Hayami, K, Morikuni, K. GMRES Methods for Tomographic Reconstruction with an Unmatched Back Projector. arXiv, Mathematics, Numerical Analysis. 2021. 1-25
Hayami, K, Sugihara, K. GMRES on singular systems revisited. arXiv, Mathematics, Numerical Analysis. 2020. 1-13

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Patents (11)：

Device for rapidly solving a symmetric linear system on a supercompute
数値積分装置
特異積分用数値積分装置
対称連立一次方程式の求解方法
数値積分装置

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Books (5)：

ギルバート・ストラング著, 日本応用数理学会監訳, 今井桂子・岡本久監訳幹事, 世界標準MIT教科書ストラング:計算理工学
近代科学社 2016 ISBN:9784764904231
応用数理ハンドブック (薩摩順吉, 大石進一, 杉原正顯編)
朝倉書店 2013
計算力学理論ハンドブック (萩原一郎, 田端正久監訳)
朝倉書店 2010 ISBN:9784254231205
岩波数学辞典第4版 (日本数学会編集)
岩波書店 2007 ISBN:4000802097
A Projection Transformation Method for Nearly Singular Surface Boundary Element Integrals (Lecture Notes in Engineering, Vol. 73)
Springer Verlag, 456 pages 1992 ISBN:3540550003

Lectures and oral presentations (236)：

On breakdown of GMRES for non-range-symmetric systems
(The 20th Joint Meeting of Special Activity Groups, The Japan Society of Industrial and Applied Mathematics 2024)
Right preconditioned GMRES for arbitrary singular systems
(2023)
GMRES methods for tomographic reconstruction with an unmatched back projector
(10th International Congress on Industrial and Applied Mathematics (ICIAM 2023 Tokyo) 2023)
GMRES using pseudoinverse for range symmetric singular systems
(10th International Congress on Industrial and Applied Mathematics (ICIAM 2023 Tokyo) 2023)
GMRES Methods for Tomographic Reconstruction with an Unmatched Back Projector
(The Ninth China-Russia Conference on Numerical Algebra with Applications (CRCNAA 2023) 2023)

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Works (5)：

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 2019 -
Cluster Gauss Newton method for obtaining multiple solutions of nonlinear least squares problems (Application to parameter estimation of Physiologically based Pharmacokinetic (PBPK) models)
Aoki, Y, Hayami, K 2018 -
Programs for Cluster Newton method for under-determined inverse problems 2
Yasunori Aoki 2016 -
The programs for the Cluster Newton method for solving underdetermined inverse problems
Yasunori Aoki, Philippe Gaudreau 2014 - 2015
Iterative solvers for least square problems based on inner-iteration preconditioned GMRES methods
Keiichi Morikuni 2014 -

Education (9)：

1993 - 1993 Doctor of Engineering, The University of Tokyo
1991 - 1991 Doctor of Philosophy (Ph.D.), Wessex Institute of Technology, Council for National Academic Awards, U.K.,
1979 - 1981 The University of Tokyo The Graduate School of Engineering Master Course Degree, Department of Mathematical Engineering and Instrumentation Physics
1977 - 1979 The University of Tokyo Faculty of Engineering Bachelor Degree, Department of Mathematical Engineering and Instrumentation Physics (Mathematical Engineering Course)
1975 - 1977 The University of Tokyo, Entrance School of Arts and Sciences Sciences 1

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Professional career (2)：

Ph.D. (Wessex Institute of Technology, and Council for National Academic Awards, U.K.)
Ph.D. (Engineering) (The University of Tokyo)

Work history (15)：

2023/06 - 現在 President, Japan Society for Industrial and Applied Mathematics (JSIAM)
2021/04 - 現在 The Graduate University for Advanced Studies Professor Emeritus
2021/04 - 現在 Professor Emeritus, National Institute of Informatics
2018/06 - 現在 Fellow, Japan Society for Industrial and Applied Mathematics (JSIAM)
2006/04 - 2021/03 Professor, Principles of Informatics Research Division, National Institute of Informatics

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Committee career (36)：

2023/06 - 現在 The Japan Society for Industrial and Applied Mathematics (JSIAM) President
2018/06 - 現在 Japan Journal of Industrial and Applied Mathematics Fellow
2014 - 現在 Electronic Transactions on Numerical Analysis (ETNA) Member of Editorial Board
2013 - 現在実教出版プログラミング技術監修
2012 - 現在 Numerical Algorithms Member of Editorial Board

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Awards (8)：

2018/06 - The Japan Society for Industrial and Applied Mathematics Fellow
2015/09 - The Japan Society for Industrial and Applied Mathematics 2015 Best Author Prize "Cluster Newton Method for Underdetermined Inverse Problems and its Application to Pharmacokinetics Model"
2013/07 - Society for Industrial and Applied Mathematics (SIAM) SIAM Student Paper Prize, ( http://siam.org/prizes/sponsored/student_paper.php ) for the paper: Morikuni, K., and Hayami, K., Inner-iteration Krylov subspace methods for least squares problems, SIAM Journal on Matrix Analysis and Applications, Vol. 34, No. 1, pp. 1-22, 2013.
2011/07 - Aachen Conference on Computational Engineering Science (AC.CES), ( http://www.acces11.rwth-aachen.de/MainContents/News.php ) First Prize in the AC.CES poster awarded to Mr. Yasunori Aoki for the poster: "Aoki, Y., Hayami, K., Konagaya, A., and De Sterck, H., An Algorithm for Solving Underdetermined Inverse Problems: Application to Parameter Identification for a Pharmacokinetics Model
2010/10 - Numerical Algebra Group, China Society of Computational Mathematics (CSCM), (http://lsec.cc.ac.cn/~NASCNAG/Prize.html). The Applied Numerical Algebra Prize, for the paper: “Ken Hayami, Jun-Feng Yin and Tokushi Ito, GMRES methods for least squares problems, SIAM Journal on Matrix Analysis and Applications, 31:5(2010), 2400-2430”.

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Association Membership(s) (7)：

Society for Industrial and Applied Mathematics (SIAM) , 日本応用数理学会 , The Chem-Bio Informatics Society , 情報処理学会 , 日本計算工学会 , 日本シミュレーション学会 , 日本数学会

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