Takeshi Iwashita

Publication Activity (10 Years)

Years Active: 2000-2023
Publications (10 Years): 21

Top Topics

Preconditioned Conjugate Gradient

Parallel Implementation

Parameter Tuning

Top Venues

J. Inf. Process.

Publications

Yingqi Zhao, Takeshi Fukaya, Takeshi Iwashita
Numerical Behavior of Mixed Precision Iterative Refinement Using the BiCGSTAB Method. J. Inf. Process. 31 (2023)
Takeshi Iwashita, Kota Ikehara, Takeshi Fukaya, Takeshi Mifune
Convergence acceleration of preconditioned conjugate gradient solver based on error vector sampling for a sequence of linear systems. Numer. Linear Algebra Appl. 30 (6) (2023)
Kengo Suzuki, Takeshi Fukaya, Takeshi Iwashita
A novel ILU preconditioning method with a block structure suitable for SIMD vectorization. J. Comput. Appl. Math. 419 (2023)
Hirotoshi Tamori, Takeshi Fukaya, Takeshi Iwashita
Subspace Correction Preconditioning for Solving a Sequence of Asymmetric Linear Systems Using the Bi-CGSTAB Method. J. Inf. Process. 31 (2023)
Takeshi Iwashita, Kota Ikehara, Takeshi Fukaya, Takeshi Mifune
Convergence Acceleration of Preconditioned CG Solver Based on Error Vector Sampling for a Sequence of Linear Systems. CoRR (2022)
Yingqi Zhao, Takeshi Fukaya, Linjie Zhang, Takeshi Iwashita
) Method Using FP64 and FP32. J. Inf. Process. 30 (2022)
Kengo Suzuki, Takeshi Fukaya, Takeshi Iwashita
A New AINV Preconditioner for the CG Method in Hybrid CPU-GPU Computing Environment. J. Inf. Process. 30 (2022)
Takeshi Fukaya, Koki Ishida, Akie Miura, Takeshi Iwashita, Hiroshi Nakashima
Accelerating the SpMV kernel on standard CPUs by exploiting the partially diagonal structures. CoRR (2021)
Takeshi Iwashita, Kengo Suzuki, Takeshi Fukaya
An Integer Arithmetic-Based Sparse Linear Solver Using a GMRES Method and Iterative Refinement. CoRR (2020)
Takeshi Iwashita, Senxi Li, Takeshi Fukaya
Hierarchical block multi-color ordering: a new parallel ordering method for vectorization and parallelization of the sparse triangular solver in the ICCG method. CCF Trans. High Perform. Comput. 2 (2) (2020)
Takeshi Iwashita, Kengo Suzuki, Takeshi Fukaya
An Integer Arithmetic-Based Sparse Linear Solver Using a GMRES Method and Iterative Refinement. ScalA@SC (2020)
Rise Ooi, Takeshi Iwashita, Takeshi Fukaya, Akihiro Ida, Rio Yokota
Effect of Mixed Precision Computing on H-Matrix Vector Multiplication in BEM Analysis. HPC Asia (2020)
Takeshi Iwashita, Senxi Li, Takeshi Fukaya
Hierarchical Block Multi-Color Ordering: A New Parallel Ordering Method for Vectorization and Parallelization of the Sparse Triangular Solver in the ICCG Method. CoRR (2019)
Akihiro Ida, Hiroshi Nakashima, Tasuku Hiraishi, Ichitaro Yamazaki, Rio Yokota, Takeshi Iwashita
QR Factorization of Block Low-rank Matrices with Weak Admissibility Condition. J. Inf. Process. 27 (2019)
Senxi Li, Takeshi Iwashita, Takeshi Fukaya
Enhancement of Algebraic Block Multi-Color Ordering for ILU Preconditioning and Its Performance Evaluation in Preconditioned GMRES Solver. J. Inf. Process. 27 (2019)
Rise Ooi, Takeshi Iwashita, Takeshi Fukaya, Akihiro Ida, Rio Yokota
Effect of Mixed Precision Computing on H-Matrix Vector Multiplication in BEM Analysis. CoRR (2019)
Akihiro Fujii, Shigeo Kaneko, Teruo Tanaka, Takeshi Iwashita
Time Segment Correction Method for Parallel Time Integration. J. Inf. Process. 27 (2019)
Takeshi Fukaya, Takeshi Iwashita
Time-space tiling with tile-level parallelism for the 3D FDTD method. HPC Asia (2018)
Takeshi Iwashita, Shigeru Kawaguchi, Takeshi Mifune, Tetsuji Matsuo
Automatic mapping operator construction for subspace correction method to solve a series of linear systems. JSIAM Lett. 9 (2017)
Takeshi Iwashita, Akihiro Ida, Takeshi Mifune, Yasuhito Takahashi
Software Framework for Parallel BEM Analyses with H-matrices Using MPI and OpenMP. ICCS (2017)
Satoshi Matsuoka, Hideharu Amano, Kengo Nakajima, Koji Inoue, Tomohiro Kudoh, Naoya Maruyama, Kenjiro Taura, Takeshi Iwashita, Takahiro Katagiri, Toshihiro Hanawa, Toshio Endo
From FLOPS to BYTES: disruptive change in high-performance computing towards the post-moore era. Conf. Computing Frontiers (2016)
Akihiro Ida, Takeshi Iwashita, Makiko Ohtani, Kazuro Hirahara
Improvement of Hierarchical Matrices with Adaptive Cross Approximation for Large-scale Simulation. J. Inf. Process. 23 (3) (2015)
Takeshi Iwashita, Naokazu Takemura, Akihiro Ida, Hiroshi Nakashima
A New Fill-in Strategy for IC Factorization Preconditioning Considering SIMD Instructions. TrustCom/BigDataSE/ISPA (3) (2015)
Masatoshi Kawai, Takeshi Iwashita, Hiroshi Nakashima
SIMD Implementation of a Multiplicative Schwarz Smoother for a Multigrid Poisson Solver on an Intel Xeon Phi Coprocessor. VECPAR (2014)
Akihiro Ida, Takeshi Iwashita, Takeshi Mifune, Yasuhito Takahashi
Parallel Hierarchical Matrices with Adaptive Cross Approximation on Symmetric Multiprocessing Clusters. J. Inf. Process. 22 (4) (2014)
Takeshi Minami, Motoharu Hibino, Tasuku Hiraishi, Takeshi Iwashita, Hiroshi Nakashima
Automatic Parameter Tuning of Three-Dimensional Tiled FDTD Kernel. VECPAR (2014)
Takeshi Iwashita, Hiroshi Nakashima, Yasuhito Takahashi
Algebraic Block Multi-Color Ordering Method for Parallel Multi-Threaded Sparse Triangular Solver in ICCG Method. IPDPS (2012)
Takeshi Iwashita, Yu Hirotani, Takeshi Mifune, Toshio Murayama, Hideki Ohtani
Large-scale time-harmonic electromagnetic field analysis using a multigrid solver on a distributed memory parallel computer. Parallel Comput. 38 (9) (2012)
Masatoshi Kawai, Takeshi Iwashita, Hiroshi Nakashima, Osni Marques
Parallel Smoother Based on Block Red-Black Ordering for Multigrid Poisson Solver. VECPAR (2012)
Makiko Ohtani, Kazuro Hirahara, Yasuto Takahashi, Takane Hori, Mamoru Hyodo, Hiroshi Nakashima, Takeshi Iwashita
Fast Computation of Quasi-Dynamic Earthquake Cycle Simulation with Hierarchical Matrices. ICCS (2011)
Takao Shimayoshi, Kazuhiro Komurasaki, Akira Amano, Takeshi Iwashita, Tetsuya Matsuda, Masanori Kanazawa
A Method to Support Cell Physiological Modelling Using Description Language and Ontology. Inf. Media Technol. 2 (1) (2007)
Takao Shimayoshi, Komurasaki Kazuhiro, Akira Amano, Takeshi Iwashita, Kanazawa Masanori, Tetsuya Matsuda
Computer Support for Physiological Cell Modelling using an Ontology on Cell Physiology. EMBC (2006)
Takeshi Iwashita, Yuuichi Nakanishi, Masaaki Shimasaki
Comparison Criteria for Parallel Orderings in ILU Preconditioning. SIAM J. Sci. Comput. 26 (4) (2005)
Jorji Nonaka, Nobuyuki Kukimoto, Yasuo Ebara, Masato Ogata, Takeshi Iwashita, Masanori Kanazawa, Koji Koyamada
Hybrid Image Composition Mechanism for Enhancing Volume Graphics Clusters. IEICE Trans. Inf. Syst. (11) (2005)
Takeshi Iwashita, Masaaki Shimasaki
New Evaluation Index of Incomplete Cholesky Preconditioning Effect. ISHPC (2005)
Takeshi Mifune, N. Obata, Takeshi Iwashita, Masaaki Shimasaki
A Parallel Algebraic Multigrid Preconditioner Using Algebraic Multicolor Ordering for Magnetic Finite Element Analyses. PARCO (2005)
Kikuko Kawase, Minoru Kawahara, Takeshi Iwashita, Hiroyuki Kawano, Masanori Kawazawa
Parallel Vector Computing Technique for Discovering Communities on the Very Large Scale Web Graph. DaWaK (2003)
Takeshi Iwashita, Masaaki Shimasaki
Block Red-Black Ordering: A New Ordering Strategy for Parallelization of ICCG Method. Int. J. Parallel Program. 31 (1) (2003)
Takeshi Iwashita, Masaaki Shimasaki
Block Red-Black Ordering Method for Parallel Processing of ICCG Solver. ISHPC (2002)
Takeshi Iwashita, Tomohiro Tami, Masanori Kanazawa
Parallel Processing of ILU Preconditioned BiCGSTAB Solver Using Algebraic Multi-Color Ordering Method. PARELEC (2002)
Takeshi Iwashita, Takeshi Mifune, Ryo Sokabe, Masaaki Shimasaki
Three-Dimensional Finite Brick-Type Edge-Element Eddy Current Analysis Using Parallelized Linear-System Solvers. PARELEC (2000)