氏名藤田 航平
職名助教
所属計算地球科学研究センター
専門計算地球科学・計算地震工学・高性能計算
URL http://www.eri.u-tokyo.ac.jp/cshpc/fujita.html

最終更新日 09/26 2020

研究内容

計算地球科学・計算地震工学・高性能計算

主要論文・著書

Jian Chen, Tomohide Takeyama, Hideyuki O-Tani, Kohei Fujita, Muneo Hori, A Framework for Assessing Liquefaction Hazard for Urban Areas Based on Soil Dynamics, International Journal of Computational Methods, 13, 4, doi: 10.1142/S0219876216410115, , 2016.

Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Muneo Hori, Maddegedara Lalith, Kengo Nakajima, Implicit Low-Order Unstructured Finite-Element Multiple Simulation Enhanced by Dense Computation using OpenACC, Proceedings of Fourth Workshop on Accelerator Programming Using Directives (WACCPD), , 2017.

Kohei Fujita, Tsuyoshi Ichimura, Kentaro Koyama, Hikaru Inoue, Muneo Hori, Lalith Maddegedara, Fast and Scalable Low-order Implicit Unstructured Finite-element Solver for Earth's Crust Deformation Problem, Proceedings of the Platform for Advanced Scientific Computing (PASC) Conference, , 2017.

Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Takane Hori, Muneo Hori, Lalith Wijerathne, Fast Finite Element Analysis Method Using Multiple GPUs for Crustal Deformation and its Application to Stochastic Inversion Analysis with Geometry Uncertainty, Procedia Computer Science (International Conference on Computational Science), 108, 765--775, 2017.

Tsuyoshi Ichimura, Kohei Fujita, Atsushi Yoshiyuki, Pher Errol Quinay, Muneo Hori, Takashi Sakanoue, Performance Enhancement of Three-Dimensional Soil Structure Model via Optimization for Estimating Seismic Behavior of Buried Pipelines, Journal of Earthquake and Tsunami, 11, 5, doi: 10.1142/S1793431117500191, , 2017.

Jian Chen, Tomohide Takeyama, Hideyuki O-Tani, Kohei Fujita, Hiroki Motoyama, Muneo Hori, Using High Performance Computing for Liquefaction Hazard Assessment with Statistical Soil Models, International Journal of Computational Methods, doi: 10.1142/S0219876218400054, , 2017.

Kohei Fujita, Keisuke Katsushima, Tsuyoshi Ichimura, Masashi Horikoshi, Kengo Nakajima, Muneo Hori, Lalith Maddegedara, Wave Propagation Simulation of Complex Multi-Material Problems with Fast Low-Order Unstructured Finite-Element Meshing and Analysis, HPC Asia 2018, 24--35, 2018.

Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Anne Glerum, Ylona van Dinther, Takane Hori, Olaf Schenk, Muneo Hori, Lalith Wijerathne, Viscoelastic Crustal Deformation Computation Method with Reduced Random Memory Accesses for GPU-Based Computers, Computational Science – ICCS 2018. ICCS 2018. Lecture Notes in Computer Science, 10861, doi: 10.1007/978-3-319-93701-4_3, , 2018.

Atsushi Yoshiyuki, Kohei Fujita, Tsuyoshi Ichimura, Muneo Hori, Lalith Wijerathne, Development of Scalable Three-Dimensional Elasto-Plastic Nonlinear Wave Propagation Analysis Method for Earthquake Damage Estimation of Soft Grounds, Computational Science – ICCS 2018. ICCS 2018. Lecture Notes in Computer Science, 10861, doi: 10.1007/978-3-319-93701-4_1, , 2018.

Keisuke Katsushima, Kohei Fujita, Tsuyoshi Ichimura, Muneo Hori, Lalith Maddegedara, Development of Octree-Based High-Quality Mesh Generation Method for Biomedical Simulation, Computational Science – ICCS 2018. ICCS 2018. Lecture Notes in Computer Science, 10861, doi: 10.1007/978-3-319-93701-4_27, , 2018.

Kohei Fujita, Tsuyoshi Ichimura, Motoki Kazama, Susumu Ohno, Shingo Sato, Development of Three-Dimensional Soil-Amplification Analysis Method for Screening for Seismic Damage to Buried Water-Distribution Pipeline Networks, Geosciences, 8, 5, doi: 10.3390/geosciences8050170, , 2018.

Tsuyoshi Ichimura, Kohei Fujita, Masashi Horikoshi, Larry Meadows, Kengo Nakajima, Takuma Yamaguchi, Kentaro Koyama, Hikaru Inoue, Akira Naruse, Keisuke Katsushima, Muneo Hori, Maddegedara Lalith, A Fast Scalable Implicit Solver with Concentrated Computation for Nonlinear Time-evolution Problems on Low-order Unstructured Finite Elements, 32nd IEEE International Parallel and Distributed Processing Symposium, doi: 10.1109/IPDPS.2018.00071, , 2018.

Toby Simpson, Dimosthenis Pasadakis, Drosos Kourounis, Kohei Fujita, Takuma Yamaguchi, Tsuyoshi Ichimura, Olaf Schenk, Balanced Graph Partition Refinement using the Graph p-Laplacian, Proceedings of the Platform for Advanced Scientific Computing (PASC) Conference, doi: 10.1145/3218176.3218232, , 2018.

Hori M, Ichimura T, Wijerathne L, Ohtani H, Chen J, Fujita K and Motoyama H, Application of High Performance Computing to Earthquake Hazard and Disaster Estimation in Urban Area, Front. Built Environ., 4, 1, doi: 10.3389/fbuil.2018.00001, , 2018.

Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Akira Naruse, Jack C. Wells, Thomas C. Schulthess, Tjerk P. Straatsma, Christopher J. Zimmer, Maxime Martinasso, Kengo Nakajima, Muneo Hori, Lalith Maddegedara, A Fast Scalable Implicit Solver for Nonlinear Time-Evolution Earthquake City Problem on Low-Ordered Unstructured Finite Elements with Artificial Intelligence and Transprecision Computing, SC '18 Proceedings of the International Conference for High Performance Computing, Networking, Storage, and Analysis, 49:1--49:11, 2018.

Kahori Iiyama, Atsushi Yoshiyuki, Kohei Fujita, Tsuyoshi Ichimura, Hitoshi Morikawa, Muneo 11Hori, A point-estimate based method for soil amplification estimation using high resolution model under uncertainty of stratum boundary geometry, Soil Dynamics and Earthquake Engineering, https://doi.org/10.1016/j.soildyn.2018.1, , 2018.

Ryoichiro Agata, Sylvain D. Barbot, Kohei Fujita, Mamoru Hyodo, Takeshi Iinuma, Ryoko Nakata, Tsuyoshi Ichimura, Takane Hori, Rapid mantle flow with power-law creep explains deformation after the 2011 Tohoku mega-quake, Nature Communications, 10, 1385, , 2019.

Ryota Kusakabe, Tsuyoshi Ichimura, Kohei Fujita, Muneo Hori, Lalith Wijerathne, A finite element analysis method for simulating seismic soil liquefaction based on a large-scale 3D soil structure model, Soil Dynamics and Earthquake Engineering, 123, 64--74, 2019.

Kohei Fujita, Masashi Horikoshi, Tsuyoshi Ichimura, Larry Meadows, Kengo Nakajima, Muneo Hori, Lalith Maddegedara, Development of Element-by-Element Kernel Algorithms in Unstructured Implicit Low-Order Finite-Element Earthquake Simulation for Many-Core Wide-SIMD CPUs, Computational Science – ICCS 2019. ICCS 2019. Lecture Notes in Computer Science, 11536, DOI https://doi.org/10.1007/978-3-030-22, , 2019.

Kusakabe R., Fujita K., Ichimura T., Hori M., Wijerathne L., A Fast 3D Finite-Element Solver for Large-Scale Seismic Soil Liquefaction Analysis, Computational Science – ICCS 2019. ICCS 2019. Lecture Notes in Computer Science, 11537, DOI https://doi.org/10.1007/978-3-030-22, , 2019.

Yamaguchi T., Ichimura T., Fujita K., Hori M., Wijerathne L., Heuristic Optimization with CPU-GPU Heterogeneous Wave Computing for Estimating Three-Dimensional Inner Structure, Computational Science – ICCS 2019. ICCS 2019. Lecture Notes in Computer Science, 11537, DOI https://doi.org/10.1007/978-3-030-22, , 2019.

Mitsumasa WADA, Shiori KUBO, Hidenori YOSHIDA, Kohei FUJITA, Tsuyoshi ICHIMURA, FAILURE JUDGMENT OF RESERVOIR BODY BASED ON SEISMIC RESPONSE ANALYSIS AND FLOODED ANALYSIS ACCOMPANYING DESTRUCTION, Journal of Applied Mechanics Vol.22 (Special Feature), 75, 2, I_155--I_164, 2019.

Takuma Yamaguchi, Tsuyoshi Ichimura, Kohei Fujita, Aitaro Kato, Shigeki Nakagawa, Matched Filtering Accelerated by Tensor Cores on Volta GPUs with Improved Accuracy using Half Precision Variables, IEEE Signal Processing Letters, 26, 12, 1857--1861, 2019.

Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Akira Naruse, Maddegedara Lalith, Muneo Hori, GPU Implementation of a Sophisticated Implicit Low-Order Finite Element Solver with FP21-32-64 Computation Using OpenACC, Proceedings of Sixth Workshop on Accelerator Programming Using Directives (WACCPD), , 2019.

Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Akira Naruse, Jack C. Wells, Christopher J. Zimmer, Tjerk P. Straatsma, Takane Hori, Simone Puel, Thorsten W. Becker, Muneo Hori, Naonori Ueda, 416-PFLOPS Fast Scalable Implicit Solver on Low-Ordered Unstructured Finite Elements Accelerated by 1.10-ExaFLOPS Kernel with Reformulated AI-Like Algorithm: For Equation-Based Earthquake Modeling, Research Poster for SC19: The International Conference for High Performance Computing, Networking, Storage, and Analysis, , 2019.

Ryuichi Sakamoto, Masaaki Kondo, Kohei Fujita, Tsuyoshi Ichimura, Kengo Nakajima, The Effectiveness of Low-Precision Floating Arithmetic on Numerical Codes: A Case Study on Power Consumption, Proceedings of HPC Asia 2020, DOI: 10.1145/3368474.3368492, , 2020.

Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Akira Naruse, Jack C. Wells, Christopher J. Zimmer, Tjerk P. Straatsma, Muneo Hori, Lalith Maddegedara, Naonori Ueda, Low-Order Finite Element Solver with Small Matrix-Matrix Multiplication Accelerated by AI-Specific Hardware for Crustal Deformation Computation, PASC '20: Proceedings of the Platform for Advanced Scientific Computing Conference, https://doi.org/10.1145/3394277.3401860, , 2020.

Takuma Yamaguchi, Tsuyoshi Ichimura, Kohei Fujita, Muneo Hori, Lalith Wijerathne, Naonori Ueda, Data-Driven Approach to Inversion Analysis of Three-Dimensional Inner Soil Structure via Wave Propagation Analysis, Computational Science – ICCS 2020. ICCS 2020. Lecture Notes in Computer Science, 12139, https://doi.org/10.1007/978-3-030-50420-, , 2020.

Murakami S., Yamaguchi T., Fujita K., Ichimura T., Lalith M., Hori M. , Data Assimilation in Volcano Deformation Using Fast Finite Element Analysis with High Fidelity Model, Computational Science – ICCS 2020. ICCS 2020. Lecture Notes in Computer Science, 12139, https://doi.org/10.1007/978-3-030-50420-, , 2020.

Kohei Fujita, Masashi Horikoshi, Tsuyoshi Ichimura, Larry Meadows, Kengo Nakajima, Muneo Hori, Lalith Maddegedara, Development of element-by-element kernel algorithms in unstructured finite-element solvers for many-core wide-SIMD CPUs: Application to earthquake simulation, Journal of Computational Science, 45, https://doi.org/10.1016/j.jocs.2020.1011, , 2020.

Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Muneo Hori, Lalith Wijerathne, and Naonori Ueda, Fast Multi-Step Optimization with Deep Learning for Data-Centric Supercomputing, Proceedings of the 2020 4th International Conference on High Performance Compilation, Computing and Communications (HP3C 2020), DOI:https://doi.org/10.1145/3407947.3407, , 2020.