Ken Hayami

J-GLOBAL         Last updated: Oct 12, 2017 at 19:57
 
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Name
Ken Hayami
E-mail
hayaminii.ac.jp
URL
http://research.nii.ac.jp/~hayami/index-e.html
Affiliation
National Institute of Informatics
Research funding number
20251358

Profile

 I am doing research and teaching on the theory and application of numerical computation. Emphasis is on the mathematical analysis of numerical algorithms and the development of new algorithms.
Main areas of my present research interests are numerical linear algebra (iterative solution of linear systems, least squares problems, constrained and nonlinear least squares problems) and its application to optimization, inverse problems, and ill-posed problems.

Research Areas

 
 
  • Computational science / Computational science / mathematical engineering, apllied mathematics, numerical analysis, numerical linear algebra

Academic & Professional Experience

 
Apr 2006
 - 
Today
Professor, Principles of Informatics Research Division, National Institute of Informatics
 
Apr 2004
 - 
Today
Professor, Department of Informatics, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies
 
Apr 2006
 - 
Mar 2008
Head, Department of Informatics, School of Multidisciplinary Sciences, The Graduate University for Advanced Studies
 
Jan 2001
 - 
Mar 2006
Professor, Mathematical Informatics, Foundations of Informatics Research Division, National Institute of Informatics
 
Apr 2002
 - 
Mar 2004
Professor, Department of Informatics, School of Mathematical and Physical Science, The Graduate University for Advanced Studies
 

Published Papers

 
Bai, Z.-Z., Buccini, A., Hayami, K., Reichel, L., Yin, J.-F., Zheng, N.,
Journal of Computational and Applied Mathematics   319 1-13   Aug 2017   [Refereed]
Marin, J., Mas, J., Guerrero, D., and Hayami, K.,
Numerical Algorithms   75 491-508   Jun 2017   [Refereed]
Zheng, N., Hayami, K., and Yin, J.-F.
SIAM Journal on Matrix Analysis and Applications   37(3) 1250-1278   Sep 2016   [Refereed]
Sugihara, K., Hayami, K., and Zheng, N.,
Transactions of the Japan Society for Industrial and Applied Mathematics (in Japanese)   26(2) 124-166   Aug 2016   [Refereed]
Xu, W., Zheng, N., and Hayami, K.,
Journal of Scientific Computing   DOI 10.1007/s10915-016-0167-z(68) 1055-1081   Feb 2016   [Refereed]

Books etc

 
A Projection Transformation Method for Nearly Singular Surface Boundary Element Integrals (Lecture Notes in Engineering, Vol. 73)
Hayami, K
Springer Verlag, 456 pages   Jan 1992   ISBN:3-540-55000-3
http://link.springer.com/book/10.1007/978-3-642-84698-4/page/1

Conference Activities & Talks

 
Gimeno, J., Hayami, K., and Jorba, A.
46th Numerical Analysis Symposium   28 Jun 2017   
Zheng, N., Hayami, K.*, and Ono, N.
Applied Inverese Problems 2017, Hangzhou, China   29 May 2017   
Right Preconditioned MINRES for Singular Systems [Invited]
Sugihara, K., Hayami, K., and Zheng, N.
Invited Talk at The School of Mathematics and Statistics Northeast Normal University, Changchun, China   8 Dec 2016   
Nonnegative Matrix Factorization via A New Alternating Nonnegative Least Squares Method and Anderson Acceleration [Invited]
Zheng, N., Hayami, K.*, and Ono, N.,
Invited Talk at The School of Mathematics and Statistics Northeast Normal University, Changchun, China   8 Dec 2016   
Modulus Iterative Methods for Box Constrained Least Squares Problem [Invited]
Zheng, N., Hayami, K.*, and Yin, J.-F.
Invited Talk at The School of Mathematics and Statistics Northeast Normal University, Changchun, China   8 Dec 2016   

Teaching Experience

 
 

Misc

 
Cui, Y., Morikuni, K., Tsuchiya, T., and Hayami, K.
NII Technical Reports, National Institute of Informatics, Tokyo   NII-2016(003E) 1-27   May 2016
Ken Hayami
JSIAM Online Magazine      Nov 2015   [Invited]
Modulus-Type Inner Outer Iterative Methods for Nonnegative Constrained Least Squares Problems
Zheng, N., Hayami, K., Yin, J.-F.
NII Technical Reports, National Institute of Informatics, Tokyo   NII-2015(001E) 1-23   Jan 2015
Modulus inner-outer iterative method for nonnegative constrained least squares problems
Zheng, N., Hayami, K., and Yin, J.-F.,
2014 Annual Meeting of the Japan Society for Industrial and Applied Mathematics, National Graduate Institute for Policy Studies, Tokyo      Sep 2014
Jacobian-Free Three-Level Trust Region Method for Nonlinear Least Squares Problems
Xu, W., Zheng, N., and Hayami, K.,
NII Technical Reports, National Institute of Informatics, Tokyo   NII-2014(003E) 1-22   Sep 2014

Association Memberships

 
 

Awards & Honors

 
Sep 2016
Excellent Student Award, National Institute of Informatics
Winner: Ning Zheng
 
Sep 2015
"Cluster Newton Method for Underdetermined Inverse Problems and its Application to Pharmacokinetics Model", 2015 Best Author Prize, The Japan Society for Industrial and Applied Mathematics
Winner: Yasunori Aoki, Ken Hayami, Akihiko Konagaya
 
Feb 2015
Inner-iterationPreconditioning for Least Squares Problems, The 2014 (31st) Inoue Research Award for Young Scientists, Tthe Inoue Foundation for Science
Winner: Keiichi Morikuni
 
http://www.inoue-zaidan.or.jp/b-01.html
Jul 2013
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., SIAM Student Paper Prize, ( http://siam.org/prizes/sponsored/student_paper.php ) , Society for Industrial and Applied Mathematics (SIAM)
Winner: Keiichi Morikuni
 
Mar 2013
Excellent Student Award, National Institute of Informatics
Winner: Keiichi Morikuni
 

Research Grants & Projects

 
MInistry of Education, Culture, Sports, Science and Technology in Japan: Grants-in-Aid for Scientific Research (C)
Project Year: Apr 2015 - Mar 2018    Investigator(s): Ken Hayami
MInistry of Education, Culture, Sports, Science and Technology in Japan: Grants-in-Aid for Scientific Research (B)
Project Year: Apr 2015 - Mar 2018    Investigator(s): Takashi Tsuchiya
MInistry of Education, Culture, Sports, Science and Technology in Japan: Grants-in-Aid for Scientific Research (C)
Project Year: Apr 2012 - Mar 2014    Investigator(s): Ken Hayami
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2009 - 2011    Investigator(s): Ken HAYAMI
Least squares problems arise, for instance, when one wants to find a solution to system of linear equations where there are more equations than unknowns. Such problems arise in science, engineering and sociology, for instance, in statistics, surve...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2005 - 2007    Investigator(s): Ken HAYAMI
Research was done on applying the Generalized Minimal Residual (GMRES) method, which is a Krylov subspace iterative method for solving systems of linear equations, to large scale least squares problems by using mapping matrices. More specifically,...

Works

 
Yasunori Aoki   Software   Mar 2016
Software related to:
Aoki, Y., Hayami, K., De Sterck, H. and Konagaya, A.,
Cluster Newton method for sampling multiple solutions of an underdetermined inverse problem:
Parameter identification for pharmacokinetics,
SIAM Journal on Scientific Comp...
Yasunori Aoki, Philippe Gaudreau   Software   2014 - 2015
Software related to
[1]Yasunori Aoki, Ken Hayami, Hans De Sterck, Akihiko Konagaya: Cluster Newton Method for Sampling Multiple Solutions of Underdetermined Inverse Problems:Application to a Parameter Identification Problem in Pharmacokinetics, SI...
Keiichi Morikuni   Software   2014
Codes related to
[1] Morikuni, K. and Hayami, K., Inner-iteration Krylov subspace methods for least squares problems, SIAM Journal on Matrix Analysis and Applications, Volume 34, Number 1, pages 1-22, 2013.
[2] Morikuni, K. and Hayami, K., Conve...

Education

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

Committee Memberships

 
2014
 - 
Today
Electronic Transactions on Numerical Analysis  Member of Editorial Board
 
2013
 - 
Today
JSIAM Letters  Associate Editor
 
2012
 - 
Today
Numerical Algorithms  Member of Editorial Board
 
2010
 - 
Today
Japan Journal of Industrial and Applied Mathematics  Associate Editor (Area <2>)
 
2010
 - 
Today
Numerical Algebra, Control and Optimization  Member of Editorial Board