Takeshi Iwashita

47 papers A 2B 1C 2Misc 2Journal 27Unranked 13

Year	Rank	Type	Title / Venue / Authors
2026	—	`conf`	Tensor-Core-Optimized Strategies for BLR × Tall-Skinny Matrix Multiplication in BEM. SCA/HPC Asia Akihiro Ida, Kazuya Goto, Rio Yokota, Tasuku Hiraishi, Toshihiro Hanawa, Takeshi Iwashita, Masatoshi Kawai, Satoshi Ohshima, Tetsuya Hoshino
2025	A	`conf`	A Nested Krylov Method Using Half-Precision Arithmetic. SC Kengo Suzuki, Takeshi Iwashita
2025	J	`jnl`	A Nested Krylov Method Using Half-Precision Arithmetic. CoRR Kengo Suzuki, Takeshi Iwashita
2025	J	`jnl`	An Integer Arithmetic-Based AMG Preconditioned FGMRES Solver. ACM Trans. Math. Softw. Kengo Suzuki, Takeshi Fukaya, Takeshi Iwashita
2025	J	`jnl`	Condition Number Estimation in a Solution Process of a Large Sparse Symmetric Linear System. J. Inf. Process. Yuya Kudo, Yuki Satake, Takeshi Fukaya, Takeshi Iwashita
2025	J	`jnl`	Performance Evaluation of the Parallel ES-SC-ILU-BiCGSTAB Method. J. Inf. Process. Hirotoshi Tamori, Takeshi Fukaya, Takeshi Iwashita
2023	J	`jnl`	A novel ILU preconditioning method with a block structure suitable for SIMD vectorization. J. Comput. Appl. Math. Kengo Suzuki, Takeshi Fukaya, Takeshi Iwashita
2023	J	`jnl`	Convergence acceleration of preconditioned conjugate gradient solver based on error vector sampling for a sequence of linear systems. Numer. Linear Algebra Appl. Takeshi Iwashita, Kota Ikehara, Takeshi Fukaya, Takeshi Mifune
2023	J	`jnl`	Numerical Behavior of Mixed Precision Iterative Refinement Using the BiCGSTAB Method. J. Inf. Process. Yingqi Zhao, Takeshi Fukaya, Takeshi Iwashita
2023	J	`jnl`	Subspace Correction Preconditioning for Solving a Sequence of Asymmetric Linear Systems Using the Bi-CGSTAB Method. J. Inf. Process. Hirotoshi Tamori, Takeshi Fukaya, Takeshi Iwashita
2022	J	`jnl`	A New AINV Preconditioner for the CG Method in Hybrid CPU-GPU Computing Environment. J. Inf. Process. Kengo Suzuki, Takeshi Fukaya, Takeshi Iwashita
2022	J	`jnl`	Convergence Acceleration of Preconditioned CG Solver Based on Error Vector Sampling for a Sequence of Linear Systems. CoRR Takeshi Iwashita, Kota Ikehara, Takeshi Fukaya, Takeshi Mifune
2022	J	`jnl`	Numerical Investigation into the Mixed Precision GMRES( J. Inf. Process. Yingqi Zhao, Takeshi Fukaya, Linjie Zhang, Takeshi Iwashita
2021	J	`jnl`	Accelerating the SpMV kernel on standard CPUs by exploiting the partially diagonal structures. CoRR Takeshi Fukaya, Koki Ishida, Akie Miura, Takeshi Iwashita, Hiroshi Nakashima
2020	—	`conf`	An Integer Arithmetic-Based Sparse Linear Solver Using a GMRES Method and Iterative Refinement. ScalA@SC Takeshi Iwashita, Kengo Suzuki, Takeshi Fukaya
2020	J	`jnl`	An Integer Arithmetic-Based Sparse Linear Solver Using a GMRES Method and Iterative Refinement. CoRR Takeshi Iwashita, Kengo Suzuki, Takeshi Fukaya
2020	C	`conf`	Effect of Mixed Precision Computing on H-Matrix Vector Multiplication in BEM Analysis. HPC Asia Rise Ooi, Takeshi Iwashita, Takeshi Fukaya, Akihiro Ida, Rio Yokota
2020	J	`jnl`	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. Takeshi Iwashita, Senxi Li, Takeshi Fukaya
2019	J	`jnl`	Effect of Mixed Precision Computing on H-Matrix Vector Multiplication in BEM Analysis. CoRR Rise Ooi, Takeshi Iwashita, Takeshi Fukaya, Akihiro Ida, Rio Yokota
2019	J	`jnl`	Enhancement of Algebraic Block Multi-Color Ordering for ILU Preconditioning and Its Performance Evaluation in Preconditioned GMRES Solver. J. Inf. Process. Senxi Li, Takeshi Iwashita, Takeshi Fukaya
2019	J	`jnl`	Hierarchical Block Multi-Color Ordering: A New Parallel Ordering Method for Vectorization and Parallelization of the Sparse Triangular Solver in the ICCG Method. CoRR Takeshi Iwashita, Senxi Li, Takeshi Fukaya
2019	J	`jnl`	QR Factorization of Block Low-rank Matrices with Weak Admissibility Condition. J. Inf. Process. Akihiro Ida, Hiroshi Nakashima, Tasuku Hiraishi, Ichitaro Yamazaki, Rio Yokota, Takeshi Iwashita
2019	J	`jnl`	Time Segment Correction Method for Parallel Time Integration. J. Inf. Process. Akihiro Fujii, Shigeo Kaneko, Teruo Tanaka, Takeshi Iwashita
2018	C	`conf`	Time-space tiling with tile-level parallelism for the 3D FDTD method. HPC Asia Takeshi Fukaya, Takeshi Iwashita
2017	J	`jnl`	Automatic mapping operator construction for subspace correction method to solve a series of linear systems. JSIAM Lett. Takeshi Iwashita, Shigeru Kawaguchi, Takeshi Mifune, Tetsuji Matsuo
2017	Misc	`conf`	Software Framework for Parallel BEM Analyses with H-matrices Using MPI and OpenMP. ICCS Takeshi Iwashita, Akihiro Ida, Takeshi Mifune, Yasuhito Takahashi
2016	—	`conf`	From FLOPS to BYTES: disruptive change in high-performance computing towards the post-moore era. Conf. Computing Frontiers Satoshi Matsuoka, Hideharu Amano, Kengo Nakajima, Koji Inoue, Tomohiro Kudoh, Naoya Maruyama, Kenjiro Taura, Takeshi Iwashita, Takahiro Katagiri, Toshihiro Hanawa, Toshio Endo
2015	—	`conf`	A New Fill-in Strategy for IC Factorization Preconditioning Considering SIMD Instructions. TrustCom/BigDataSE/ISPA (3) Takeshi Iwashita, Naokazu Takemura, Akihiro Ida, Hiroshi Nakashima
2015	J	`jnl`	Improvement of Hierarchical Matrices with Adaptive Cross Approximation for Large-scale Simulation. J. Inf. Process. Akihiro Ida, Takeshi Iwashita, Makiko Ohtani, Kazuro Hirahara
2014	—	`conf`	Automatic Parameter Tuning of Three-Dimensional Tiled FDTD Kernel. VECPAR Takeshi Minami, Motoharu Hibino, Tasuku Hiraishi, Takeshi Iwashita, Hiroshi Nakashima
2014	J	`jnl`	Parallel Hierarchical Matrices with Adaptive Cross Approximation on Symmetric Multiprocessing Clusters. J. Inf. Process. Akihiro Ida, Takeshi Iwashita, Takeshi Mifune, Yasuhito Takahashi
2014	—	`conf`	SIMD Implementation of a Multiplicative Schwarz Smoother for a Multigrid Poisson Solver on an Intel Xeon Phi Coprocessor. VECPAR Masatoshi Kawai, Takeshi Iwashita, Hiroshi Nakashima
2012	A	`conf`	Algebraic Block Multi-Color Ordering Method for Parallel Multi-Threaded Sparse Triangular Solver in ICCG Method. IPDPS Takeshi Iwashita, Hiroshi Nakashima, Yasuhito Takahashi
2012	J	`jnl`	Large-scale time-harmonic electromagnetic field analysis using a multigrid solver on a distributed memory parallel computer. Parallel Comput. Takeshi Iwashita, Yu Hirotani, Takeshi Mifune, Toshio Murayama, Hideki Ohtani
2012	—	`conf`	Parallel Smoother Based on Block Red-Black Ordering for Multigrid Poisson Solver. VECPAR Masatoshi Kawai, Takeshi Iwashita, Hiroshi Nakashima, Osni Marques
2011	Misc	`conf`	Fast Computation of Quasi-Dynamic Earthquake Cycle Simulation with Hierarchical Matrices. ICCS Makiko Ohtani, Kazuro Hirahara, Yasuto Takahashi, Takane Hori, Mamoru Hyodo, Hiroshi Nakashima, Takeshi Iwashita
2007	J	`jnl`	A Method to Support Cell Physiological Modelling Using Description Language and Ontology. Inf. Media Technol. Takao Shimayoshi, Kazuhiro Komurasaki, Akira Amano, Takeshi Iwashita, Tetsuya Matsuda, Masanori Kanazawa
2006	—	`conf`	Computer Support for Physiological Cell Modelling using an Ontology on Cell Physiology. EMBC Takao Shimayoshi, Kazuhiro Komurasaki, Akira Amano, Takeshi Iwashita, Kanazawa Masanori, Tetsuya Matsuda
2005	—	`conf`	A Parallel Algebraic Multigrid Preconditioner Using Algebraic Multicolor Ordering for Magnetic Finite Element Analyses. PARCO Takeshi Mifune, N. Obata, Takeshi Iwashita, Masaaki Shimasaki
2005	J	`jnl`	Comparison Criteria for Parallel Orderings in ILU Preconditioning. SIAM J. Sci. Comput. Takeshi Iwashita, Yuuichi Nakanishi, Masaaki Shimasaki
2005	J	`jnl`	Hybrid Image Composition Mechanism for Enhancing Volume Graphics Clusters. IEICE Trans. Inf. Syst. Jorji Nonaka, Nobuyuki Kukimoto, Yasuo Ebara, Masato Ogata, Takeshi Iwashita, Masanori Kanazawa, Koji Koyamada
2005	—	`conf`	New Evaluation Index of Incomplete Cholesky Preconditioning Effect. ISHPC Takeshi Iwashita, Masaaki Shimasaki
2003	J	`jnl`	Block Red-Black Ordering: A New Ordering Strategy for Parallelization of ICCG Method. Int. J. Parallel Program. Takeshi Iwashita, Masaaki Shimasaki
2003	B	`conf`	Parallel Vector Computing Technique for Discovering Communities on the Very Large Scale Web Graph. DaWaK Kikuko Kawase, Minoru Kawahara, Takeshi Iwashita, Hiroyuki Kawano, Masanori Kawazawa
2002	—	`conf`	Block Red-Black Ordering Method for Parallel Processing of ICCG Solver. ISHPC Takeshi Iwashita, Masaaki Shimasaki
2002	—	`conf`	Parallel Processing of ILU Preconditioned BiCGSTAB Solver Using Algebraic Multi-Color Ordering Method. PARELEC Takeshi Iwashita, Tomohiro Tami, Masanori Kanazawa
2000	—	`conf`	Three-Dimensional Finite Brick-Type Edge-Element Eddy Current Analysis Using Parallelized Linear-System Solvers. PARELEC Takeshi Iwashita, Takeshi Mifune, Ryo Sokabe, Masaaki Shimasaki