Yasunori Futamura

J-GLOBAL         Last updated: Apr 18, 2019 at 10:01
 
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Name
Yasunori Futamura
Affiliation
University of Tsukuba
Section
Faculty of Engineering,Information and Systems
Job title
Assistant Professor
Degree
Ph.D. in Engineering(University of Tsukuba), Master of Engineering(University of Tsukuba)
Other affiliation
Department of Computer Science, University of TsukubaCollege of Information Science, University of TsukubaCenter for Artificial Intelligence Research, University of TsukubaResearch and Development Center for Precision Medicine
Research funding number
30736210
ORCID ID
0000-0001-9354-0118

Research Areas

 
 

Published Papers

 
Takahiro Yano, Yasunori Futamura, Akira Imakura, Tetsuya Sakurai
JSIAM Letters   10 77-80   2018   [Refereed]
Ayako Nakata, Yasunori Futamura, Tetsuya Sakurai, David R. Bowler, Tsuyoshi Miyazaki
Journal of Chemical Theory and Computation   13(9) 4146-4153   Jul 2017   [Refereed]
Yasunori Futamura, Takahiro Yano, Akira Imakura, Tetsuya Sakurai
Application of Mathematics   62(4) 333-355   Aug 2017   [Refereed]
Akira Imakura, Yuto Inoue, Tetsuya Sakurai, Yasunori Futamura
Neural Processing Letters   1-13   May 2017   [Refereed]
For computing weights of deep neural networks (DNNs), the backpropagation (BP) method has been widely used as a de-facto standard algorithm. Since the BP method is based on a stochastic gradient descent method using derivatives of objective functi...
Yuki Nagai, Yasushi Shinohara, Yasunori Futamura, Tetsuya Sakurai
Journal of the Physical Society of Japan   86(1) 014708   Jan 2017   [Refereed]
© 2017 The Physical Society of Japan.We propose the reduced-shifted conjugate-gradient (RSCG) method, which is numerically efficient to calculate a matrix element of a Green's function defined as a resolvent of a Hamiltonian operator, by solving l...
Shigeru Iwase, Yasunori Futamura, Akira Imakura, Tetsuya Sakurai, Tomoya Ono
SC '17 Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis   40    Nov 2017   [Refereed]
Takanori Ide, Yuto Inoue, Yasunori Futamura, Tetsuya Sakurai
Mathematical Analysis of Continuum Mechanics and Industrial Applications. Mathematics for Industry   26 207-218   2017   [Refereed]
Noritaka Shimizu, Yutaka Utsuno, Yasunori Futamura, Tetsuya Sakurai, Takahiro Mizusaki, Takaharu Otsuka
EPJ Web of Conferences   122    Jun 2016
© The Authors, published by EDP Sciences, 2016.An estimation method of the nuclear level density stochastically based on nuclear shell-model calculations is introduced. In order to count the number of the eigen-values of the shell-model Hamiltonia...
Noritaka Shimizu, Yutaka Utsuno, Yasunori Futamura, Tetsuya Sakurai, Takahiro Mizusaki, Takaharu Otsuka
Physics Letters B   753 13-17   Feb 2016   [Refereed]
We introduce a novel method to obtain level densities in large-scale
shell-model calculations. Our method is a stochastic estimation of eigenvalue
count based on a shifted Krylov-subspace method, which enables us to obtain
level densities of huge ...
Tetsuya Sakurai, Akira Imakura, Yuto Inoue, Yasunori Futamura
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   9950 LNCS 354-362   Jan 2016   [Refereed]
© Springer International Publishing AG 2016.The backpropagation algorithm for calculating gradients has been widely used in computation of weights for deep neural networks (DNNs). This method requires derivatives of objective functions and has som...
Takanori Ide, Kentaro Toda, Yasunori Futamura, Tetsuya Sakurai
SAE Technical Paper   2016-01-1378    Apr 2016   [Refereed]
IDE TAKANORI, HIGASHIDA KENTARO, NIMURA YASUNORI, SAKURAI TETSUYA
日本応用数理学会年会講演予稿集(CD-ROM)   2015 ROMBUNNO.9GATSU11NICHI,11:00,F,3   Sep 2015
NAKATA AYAKO, BOWLER D. R., FUTAMURA YASUNORI, SAKURAI TETSUYA, MIYAZAKI TSUYOSHI
日本物理学会講演概要集(CD-ROM)   70(1) ROMBUNNO.24PAF-7   Mar 2015
Yasuyuki Maeda, Yasunori Futamura, Akira Imakura, Tetsuya Sakurai
JSIAM Letters   7(0) 53-56   2015   [Refereed]
To estimate the number of eigenvalues of a Hermitian matrix that are located in a given interval, existing methods include polynomial filtering and rational filtering. Both filtering approaches are based on stochastic approximations for matrix tra...
Yasunori Futamura, Shoji Hashimoto, Akira Imakura, Keitaro Nagata, Tetsuya Sakurai
arXiv.org      Nov 2014
The Wilson fermion determinant can be written in the form of a series
expansion in fugacity Tex, provided that the eigenmodes of the
temporally reduced operator are obtained. Since the calculation of all
eigenmodes rapidly becomes pr...
NAGAI YUKI, SHINOHARA YASUSHI, FUTAMURA YASUNORI, OTA YUKIHIRO, SAKURAI TETSUYA
日本物理学会講演概要集   69(2) 556-futamura   Aug 2014
Nagai Y., Shinohara Y., Futamura Y., Ota Y., Sakurai T.
Meeting abstracts of the Physical Society of Japan   69(2)    Aug 2014
Lei Du, Yasunori Futamura, Tetsuya Sakurai
Computers and Mathematics with Applications   66 2446-2455   Jan 2014   [Refereed]
In this paper, we consider computing the approximation of block bilinear form CHA-1B, where square matrix A is large sparse, and B and C are rectangular matrices with the same size. We propose block conjugate gradient (CG) type methods for the app...
Tetsuya Sakurai, Yasunori Futamura, Hiroto Tadano
Journal of Algorithms and Computational Technology   7(3) 249-270   Sep 2013   [Refereed]
We consider an eigensolver for computing eigenvalues in a given domain and the corresponding eigenvectors of large-scale matrix pencils. The Sakurai-Sugiura (SS) method is an eigensolver based on complex moments given by contour integrals of matri...
Yasunori Futamura, Tetsuya Sakurai, Shinnosuke Furuya, Jun-Ichi Iwata
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)   7851 LNCS 226-235   Sep 2013   [Refereed]
We consider an eigenproblem derived from first-principles electronic-structure calculations. Eigensolvers based on a rational filter require solutions of linear systems with multiple shifts and multiple right hand sides for transforming the spectr...

Awards & Honors

 
Oct 2013
Multi-GPU Scalable Implementation of a Contour-Integral-Based Eigensolver for Real Symmetric Dense Generalized Eigenvalue Problems, Best Paper Award, 8th International Conference on P2P, Parallel, Grid, Cloud and Internet Computing
Winner: Takahiro Yano, Yasunori Futamura and Tetsuya Sakurai
 

Conference Activities & Talks

 
Recent Advances on the Algorithm-based Fault Tolerance of the Sakurai-Sugiura Eigensolver
Yasunori Futamura, Akira Imakura, Tetsuya Sakurai
18th SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP18)   7 Mar 2018   
Recent advances on the development of a parallel complex moment-based eigenvalue solver package z-Pares
Yasunori Futamura, Yuta Inagawa, Tetsuya Sakurai
International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing (EPASA2018)   6 Mar 2018   
Nonlinear Sakurai-Sagiura method for electronic transport calculation
Tetsuya Sakurai, Yasunori Futamura (Presenter), Akira Imakura, Shigeru Iwase, Tomoya Ono
2017 Meeting of the International Linear Algebra Society   26 Jul 2017   
A real-valued method for improving efficiency of a contour integral eigenvalue solver
Yasunori Futamura, Akira Imakura, Tetsuya Sakurai
2017 Meeting of the International Linear Algebra Society   24 Jul 2017   
Nonlinear Sakurai-Sugiura method for electronic transport calculation on KNL cluster
Tetsuya Sakurai, Yasunori Futamura (Presenter), Akira Imakura
The Platform for Advanced Scientific Computing (PASC) Conference 2017   27 Jun 2017   
Applications of the Parallel Complex Moment-Based Eigensolver Package z-Pares to Large-Scale Scientific Computations
Yasunori Futamura, Akira Imakura, Tetsuya Sakurai
2017 SIAM Conference on Computational Science and Engineering (CSE17)   28 Feb 2017   
A real-valued method for solving complex symmetric linear systems arising in contour integral eigensolver
Yasunori Futamura, Yuto Inoue, Tetsuya Sakurai
The 9th International Workshop on Parallel Matrix Algorithms and Applications (PMAA16)   7 Jul 2016   
Real-Valued Technique for Solving Linear Systems Arising in Contour Integral Eigensolver
Yasunori Futamura, Tetsuya Sakurai
17th SIAM Conference on Parallel Processing for Scientific Computing (SIAM PP16)   15 Apr 2016   
A memory saving technique for a complex moment based sparse eigensolver using the shifted block biconjugate gradient method
Yasunori Futamura, Tetsuya Sakurai
International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing (EPASA2015)   15 Sep 2015   
Highly Parallel Eigenvalue Computation in Vibration Analysis Using A Complex Moment Based Eigensolver
Yasunori Futamura, Tetsuya Sakurai, Takanori Ide, Kentaro Toda
Th 8th International Congress on Industrial and Applied Mathematics (ICIAM2015)   11 Aug 2015   
z-Pares: Software package for solving large sparse eigenvalue problems based on contour integral and complex moment
Yasunori Futamura, Tetsuya Sakurai
Sparse Solvers for Exascale: From Building Blocks to Applications" takes place in Greifswald, Germany   23 Mar 2015   
z-Pares: A Complex Moment Based Hierarchical Parallel Eigensolver Package
Yasunori Futamura, Tetsuya Sakurai
the 2014 SIAM Annual Meeting   10 Jul 2014   
z-Pares: A complex moment based hierarchical parallel eigenvalue solver package
Yasunori Futamura, Tetsuya Sakurai
8th International Workshop on Parallel Matrix Algorithms and Applications (PMAA14)   4 Jul 2014   
z-Pares: A complex moment based hierarchical parallel eigensolver package
Y. Futamura, T. Sakurai
International Workshop on Eigenvalue Problems: Algorithms; Software and Applications, in Petascale Computing (EPASA2014)   Mar 2014   
A Hierarchical Parallel Software Package of a Complex Moment Based Eigensolver
Y. Futamura, T. Sakurai
SIAM Conference on Parallel Processing for Scientific Computing (PP14)   Feb 2014   
Conjugate gradient type method for shifted linear systems with multiple right hand sides
Y. Futamura, T. Sakurai
The 9th East Asia SIAM Conference   Jun 2013   
Density Functional Electronic Band Structure Calculations with a Complex Moment Based Eigensolver
Y. Futamura, T. Sakurai, S. Furuya, J. Iwata
SIAM Conference on Computational Science and Engineering (CSE13)   Feb 2013   
Efficient algorithm for linear systems arising in solutions of eigenproblems and its application to electronic-structure calculations
Y. Futamura, T. Sakurai, S. Furuya, J. Iwata
10th International Meeting on High-Performance Computing for Computational Science (VECPAR 2012)   Jul 2012   
Efficient algorithm for solving linear systems arising from a sparse eigensolver
Y. Futamura, T. Sakurai, S. Furuya, J. Iwata
The 7th International Workshop on Parallel Matrix Algorithms and Applications (PMAA 2012)   Jun 2012   
Efficient Algorithm for Linear Systems Arising in Solutions of Eigenproblems and Its Application to Electronic-Structure Calculations
Y. Futamura, T. Sakurai, S. Furuya, J. Iwata
SIAM Conference on Parallel Processing for Scientific Computing (PP12)   15 Feb 2012   

Works

 
Yasunori Futamura, Tetsuya Sakurai   Software   Jul 2014 - Today
An opensource software

Academic & Professional Experience

 
Oct 2014
 - 
Today
Assistant Professor, Faculty of Engineering, Information and Systems, University of Tsukuba
 
Apr 2014
 - 
Sep 2014
Research Fellow, Faculty of Engineering, Information and Systems, University of Tsukuba
 
Apr 2012
 - 
Mar 2014
Research Fellowship for Young Scientists (DC2), Japan Society for the Promotion of Science
 

Education

 
Apr 2011
 - 
Mar 2014
Doctoral course, Dept. of Computer Science, Graduate School of Systems of Information Engineering, University of Tsukuba
 
Apr 2009
 - 
Mar 2011
Master's course, Dept. of Computer Science, raduate School of Systems of Information Engineering, University of Tsukuba
 
Apr 2007
 - 
Mar 2009
College of Information Science, University of Tsukuba
 
Apr 2002
 - 
Mar 2007
Dept. of Information & Computer Engineering, Toyota National College of Technology