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SHIOYA Ryuji

Faculty
Department of Information Sciences and Arts
Research Institute of Industrial Technology
Center for Computational Mechanics Research
PositionProfessor
Mail
HomepageURLhttp://www2.toyo.ac.jp/~shioya/
Birthday
Last Updated :2017/12/08

Researcher Profile and Settings

Degree

  • Doctor of engineering, University of Tokyo

Association Memberships

  • THE JAPAN SOCIETY OF MECHANICAL ENGINEERS
  • JAPAN SOCIETY FOR COMPUTATIONAL ENGINEERING AND SCIENCE
  • INFORMATION PROCESSING SOCIETY OF JAPAN

Research Activities

Research Areas

  • Mechanical engineering, Materials/Mechanics of materials
  • Informatics, Media informatics/Database
  • Integrated engineering, Nuclear engineering
  • Applied physics, Engineering fundamentals
  • Informatics, Software
  • Mechanical engineering, Materials/Mechanics of materials
  • Mechanical engineering, Intelligent mechanics/Mechanical systems

Research Interests

    CAE, Java, Computer Aided Engineering, Parallel Finite Element Analysis, Network Computing, Computational Mechanics, Parallel Computing, Finite Element Method, Domain Decomposition Method

Published Papers

  • Performance Evaluation of Local Schur Complement Approach in Domain Decomposition Method, 河合浩志, 荻野正雄, 塩谷隆二, 山田知典, 吉村忍, 日本計算工学会論文集, Vol. 2016

Misc

  • 階層型領域分割法による1000億自由度並列有限要素解析, 荻野正雄, 塩谷隆二, 計算工学講演会論文集(CD-ROM), 18,   2013 06 19
  • 地球シミュレータによる大規模有限要素法破壊力学解析と破壊力学パラメータの計算手法, 荒井皓一郎, 岡田裕, 河合浩志, 淀薫, 塩谷隆二, 計算工学講演会論文集(CD-ROM), 18,   2013 06 19
  • ADVENTURE振動固有値解析モジュールの開発, 石川格, 小林陽介, 塩谷隆二, 矢川元基, 計算工学講演会論文集(CD-ROM), 18,   2013 06 19
  • 領域分割法に基づくオフライン可視化とWebGLによる大規模解析用ネットワークCAEシステムの開発, 淀薫, 塩谷隆二, 和田義孝, 三好昭生, 計算工学講演会論文集(CD-ROM), 18,   2013 06 19
  • Implementation and Acceleration of the Parallel Finite Element Analysis Solver with Complex Data, SUGIMOTO SHIN'ICHIRO, OGINO MASAO, SHIOYA RYUJI, 電気学会静止器研究会資料, SA-13, (59-74) 41 - 44,   2013 09 26
  • Implementation and Acceleration of the Parallel Finite Element Analysis Solver for Electromagnetic Analysis, SUGIMOTO SHIN'ICHIRO, OGINO MASAO, SHIOYA RYUJI, 電気学会静止器研究会資料, SA-14, (1-15) 35 - 38,   2014 01 23
  • 大規模解析のためのオフライン可視化実装の最適化, 淀薫, 塩谷隆二, 和田義孝, 河合浩志, 計算工学講演会論文集(CD-ROM), 19,   2014 06 11
  • 京コンピュータでの領域分割法ソルバーの性能評価, 河合浩志, 荻野正雄, 塩谷隆二, 山田知典, 吉村忍, 計算工学講演会論文集(CD-ROM), 19,   2014 06 11
  • 超大規模解析のための高精細可視化ライブラリVSCGの高度化, 和田義孝, 河合浩志, 荻野正雄, 塩谷隆二, 計算工学講演会論文集(CD-ROM), 19,   2014 06 11
  • Large-scale Eigen-analysis of discrete model by EFMM, Yosuke Kobayashi Yosuke Kobayashi, Sioya Ryugi, Yagawa Genki, NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan, 58, (0) 48 - 48,   2009 , The Enriched Free Mesh Method (EFMM) is a Mixed Method using the Hellinger-Reissner principle. A highly accurate stiffness matrix is computed for each local cluster. As a result, the EFMM can compute the high performance structural problem of low-order mode without an increase in the number of DOF. In this research, a large eigenvalue analysis of discrete model of the EFMM is performed using the Lanzcos method on a PC cluster environment.The EFMM has more nonzero elements in stiffness matrix than the FEM. Therefore, we convert the stiffness matrix of the EFMM into tridiagonal one for the memory saving. It is noted that the Lanzcos method can obtain small number of eigenvalues in high accuracy with less computation time.
  • Particle Image Velocimetry using the Expert System, OKAMOTO Koji, MADARAME Haruki, SHIOYA Ryuji, Transactions of Visualization Society of Japan, 11, (1) 189 - 192,   1991 , In order to measure the velocity distributions in a tank using VTR images, a new image processing algorithm was developed, in which the expert system was used. The histogram of candidate velocity vectors was constructed. The correct vector density became larger than the false vector density in the velocity vector histogram, consequently the most probable vector was defined. The histogram was re-constructed using the information of the probable vector in order to reduce the noise and to improve the accuracy of the velocity data. For this re-construction, the method of the expert system is introduced in order to select the feed back parameters. Using this algorithm, the velocity fields could be obtained even from noisy images. The present algorithm was applied to the two-dimensional flows in a thin rectangular tank with free surface and the three-dimensional flows in a open channel, showing high effectiveness and high extensiveness.
  • Parallel Finite Element Analysis of 100 Billion DOFs based on the Hierarchical Domain Decomposition Method, 18,   2013 06
  • Development of high resolution visualization library for very large scale analysis, 18,   2013 06
  • Super computing for hydrogen society, (31) 25 - 28,   2009
  • ROBUST AND EFFICIENT PARALLEL ITERATIVE SOLVERS FOR ULTRA LARGE SCALE STRUCTURAL ANALYSIS (New Development of Numerical Analysis in the 21st Century), Yoshimura Shinobu, Shioya Ryuji, Ogino Masao, RIMS Kokyuroku, 1441,   2005 07
  • Parallel Analysis by Enriched Free Mesh Method, 15, (1) 197 - 200,   2010 05
  • 408 OpenMP Parallelization of DDM Subdomain Solver, The Computational Mechanics Conference, 2011, (24) 90 - 91,   2011 10 08
  • Introduction to Developing Applications for Smartphone : iOS vs. Android (1), SHIOYA Ryuji, NAKABAYASHI Yasushi, 16,   2011 10 31
  • Introduction to Developing Applications for Smartphone : iOS vs. Android (2), SHIOYA Ryuji, NAKABAYASHI Yasushi, 17,   2012 01 31
  • Introduction to Developing Applications for Smartphone-iOS vs. Android (3), SHIOYA Ryuji, NAKABAYASHI Yasushi, MIYACHI Hideo, 17,   2012 04 30
  • Introduction to Developing Applications for Smartphone : iOS vs. Android (4), SHIOYA Ryuji, NAKABAYASHI Yasushi, 17,   2012 07 31
  • Implementation and Acceleration of the Parallel Finite Element Analysis Solver with complex Data, SUGIMOTO Shin-ichiro, OGINO Masao, SHIOYA Ryuji, 2013, (59) 41 - 44,   2013 09 26
  • Progress of Large Scale Seismic Simulation for Nuclear Power Plant in Its Entirety(Simulation of Nuclear Reactors), Yamada Tomonori, Shioya Ryuji, Yoshimura Shinobu, Journal of the Japan Society for Simulation Technology, 30, (2) 65 - 69,   2011 06 15
  • 409 Parallel Direct Solver for BDD Pre-conditioner in ADVENTURE Solid, The Computational Mechanics Conference, 2010, (23) 344 - 345,   2010 09 23
  • Eigen-Frequency Analysis of Discrete Model by EFMM(Mechanical Systems), KOBAYASHI Yosuke, SHIOYA Ryuji, YAGAWA Genki, Transactions of the Japan Society of Mechanical Engineers. C, 76, (763) 469 - 474,   2010 03 25 , The Enriched Free Mesh Method (EFMM) is a Mixed Method using the Hellinger-Reissner principle. A highly accurate stiffness matrix is computed for each local cluster. As a result, the EFMM can compute the high performance structural problem of low-order mode without an increase in the number of DOF. In this research, a large eigen-frequency analysis of discrete model of the EFMM is performed using the Lanczos method. The EFMM has more nonzero elements in stiffness matrix than the FEM. Therefore, we convert the stiffness matrix of the EFMM into tridiagonal one for the memory saving. It is not...
  • 505 DDM on Many-core Environment Using EBE Iterative Method, The Computational Mechanics Conference, 2009, (22) 74 - 75,   2009 10 10
  • 508 Ultra Large Scale Parallel Eigen Frequency Analysis by Enriched Free Mesh Method, KOBAYASHI Yosuke, SHIOYA Ryuji, YAGAWA Genki, The Computational Mechanics Conference, 2009, (22) 80 - 81,   2009 10 10
  • F1-3 Crack propagation analysis using 3D hierarchical mesh, Murotani Kohei, Shioya Ryuji, Yagawa Genki, The Computational Mechanics Conference, 2009, (22) 346 - 347,   2009 10 10
  • Structural Analysis of 200 Million DOFs Model and Off-line Visualization on the Earth Simulator, KAWAI Hiroshi, OGINO Masao, SHIOYA Ryuji, YOSHIMURA Shinobu, 29, (1) 133 - 134,   2009 07 01
  • Parallel Enriched Free Mesh Method Using the Domain Decomposition Method, KOBAYASHI Yosuke, SHIOYA Ryuji, YAGAWA Genki, 28,   2009 06 11
  • Implementation and performance evaluation of BDD method for multi-core processors, Proceedings of the conference on computational engineering and science, 14, (1) 221 - 224,   2009 05
  • From the lecture meeting: Super computing for hydrogen society, Industrial technology, (31) 25 - 28,   2009
  • Implementation and Performance Evaluation of Parallel FEM for Many-Core Processors, OGINO MASAO, KAWAI HIROSHI, SHIOYA RYUJI, YOSHIMURA SHINOBU, IPSJ SIG Notes, 2008, (125) 127 - 132,   2008 12 09 , To improve the total performance of a PC cluster or a supercomputer using multi-core scalar CPU, not only the parallel efficiency between computational nodes or CPUs, but also prcessor cores of CPU is becoming more important than ever before. In this report, we propose a new design and programming style to optimize the performance of a parallel finite element code based on an iterative domain decomposition method on a multi-core CPU node by changing the design from memory access intensive approach to matrix storage-free one.
  • F5-2 A Large Scale Analysis of Pressure Vessel Model using Super Computers, SHIOYA Ryuji, OGINO Masao, The Computational Mechanics Conference, 2008, (21) 49 - 50,   2008 11 01
  • 852 A Parallel Balancing Preconditioner for Large-Scale Structural Analysis Considering Multipoint Constraints, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, MUNEKIYO Shouhei, The Computational Mechanics Conference, 2008, (21) 900 - 901,   2008 11 01
  • 854 Domain-wise FEM Calculation Using Iterative Solver in Domain Decomposition Method, The Computational Mechanics Conference, 2008, (21) 904 - 905,   2008 11 01
  • 116 Energy and Environment Education for Citizens cooperated with Municipality : A Promotion Activity of Science and Technology with using Hydrogen Campus, Kyushu University, YOSHIDA Keisuke, ITO Kohei, SHIOYA Rhuji, KOHNO Masamichi, HAMAMOTO Yoshinori, 2008,   2008 09 01 , An example of environment and energy education performed by collaboration between a university and a municipality is introduced. Professors of the department of Mechanical Engineering, Kyushu University, were asked by Fukuoka city to help a design of the environment and energy education program using a new campus of Kyushu University, which has many high level research facilities on hydrogen utilization. This program is aimed especially at children and their communities around the new campus. After describing the outline and schedule of the program, the result of the first execution is show...
  • Performance Optimization of Domain-wise FEM Calculation in Domain Decomposition Method on Multi-core PC, KAWAI Hiroshi, OGINO Masao, SHOYA Ryuji, YOSHIMURA Shinobu, Proceedings of the conference on computational engineering and science, 13, (2) 639 - 642,   2008 05 19
  • SEISMIC RESPONSE ANALYSIS OF A 204 MILLION DOFS FULL SCALE NUCLEAR PRESSURE VESSEL MODEL USING THE IBDD-DIAG METHOD, OGINO Masao, SHIOYA Ryuji, KAWAI Hiroshi, YOSHIMURA Shinobu, Proceedings of the conference on computational engineering and science, 13, (2) 649 - 652,   2008 05 19
  • PARALLEL SERVER-SIDE VISUALIZATION FOR EARTHQUAKE RESPONSE SIMULATION OF A 204MILLION NUCLEAR PRESSURE VESSEL MODEL, OGINO Masao, SHIOYA Ryuji, KAWAI Hiroshi, MUNEKIYO Shohei, 13, (2) 653 - 654,   2008 05 19
  • Numerical Analysis of Hydrogen Diffusion in Materials Using the Finite Element Method, KANAYAMA Hiroshi, SHIOYA Ryuji, OGINO Masao, TODA Takahiro, NAKAGAWA Takuya, 13, (2) 719 - 720,   2008 05 19
  • DEVELOPMENT OF A PARALLEL CAE SYSTEM BASED ON COMPUTER NETWORK CONSIDERING LARGE SCALE VISUALIZATION, SHIOYA Ryuji, OGINO Masao, KANAYAMA Hiroshi, FUJINO Kei, 13, (2) 927 - 928,   2008 05 19
  • Image Compression Techniques for Image Composition-based Parallel Visualization in a Large Scale Structural Analysis, KAWAI Hiroshi, OGINO Masao, SHOYA Ryuji, YOSHIMURA Shinobu, Proceedings of the conference on computational engineering and science, 13, (2) 939 - 942,   2008 05 19
  • Further Readings, SHIOYA Ryuji, 13, (1) 1758 - 1759,   2008 01 31
  • 1906 Performance Tuning of Domain-wize Calculation on Multi-core CPU for Domain Decomposition Method, KAWAI Hiroshi, OGINO Masao, SHIOYA Ryuji, YOSHIMURA Shinobu, The Computational Mechanics Conference, 2007, (20) 115 - 116,   2007 11 25
  • 1905 Parallel Coupling Analysis of Subsidence with ADVENTURE System, SHIOYA Ryuji, KANAYAMA Hiroshi, HONDA Atsushi, SCHREFLER Bernhard, SALOMONE Valentina, The Computational Mechanics Conference, 2007, (20) 113 - 114,   2007 11 25
  • F3-5 Finite element analysis of hydrogen diffusion in materials, KANAYAMA Hiroshi, NDONG-MEFANE Stephane Boris, OGINO Masao, SHIOYA Ryuji, The Computational Mechanics Conference, 2007, (20) 38 - 39,   2007 11 25 , In this paper, we focus our attention on the Krom et al. hydrogen diffusion model in materials and try to reconstruct our finite element model. It has the conservative advection term and the Galerkin method is applied for the first trial. The stabilization method will be applied in near future.
  • 205 3-D Finite Element Elasto-Plastic Analysis of Carbon Fiber Reinforced Plastic Pressure Vessels Using ADVENTURE System, OGINO Masao, SHIOYA Ryuji, KAWAI Hiroshi, KOMORI Kouichi, KANAYAMA Hiroshi, 2007,   2007 10 12
  • 637 Parallel Coupling Analysis of Subsidence, SHIOYA Ryuji, KANAYAMA Hiroshi, HONDA Atsushi, SCHREFLER Bernhand, SALOMONE Valentina, The Computational Mechanics Conference, 2006, (19) 543 - 544,   2006 11 02
  • 638 The Parallel Finite Element Analysis with the Balancing Domain Decomposition Method Considering Multipoint Constraints, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, KIRA Bunshiro, MIYAMURA Tomoshi, The Computational Mechanics Conference, 2006, (19) 545 - 546,   2006 11 02
  • 640 Visualization of Structural Analysis on The Earth Simulator using ADVENTURE AutoGL, KAWAI Hiroshi, OGINO Masao, SHIOYA Ryuji, YOSHIMURA Shinobu, The Computational Mechanics Conference, 2006, (19) 549 - 550,   2006 11 02
  • Facolta di Ingegneria, Universita degli Studi di Padova, SHIOYA Ryuji, 11, (3) 1429 - 1430,   2006 07 31
  • A Scalable Balancing Domain Decomposition Based Preconditioner for Large Scale Heat Transfer Problems, MUKADDES Abul Mukid Mohammad, OGINO Masao, KANAYAMA Hiroshi, SHIOYA Ryuji, JSME international journal. Ser. B, Fluids and thermal engineering, 49, (2) 533 - 540,   2006 05 15 , An efficient and scalable Balancing Domain Decomposition (BDD) type preconditioner for large scale linear systems arising from 3-dimensional heat transfer problems is presented. The new method improves parallel scalability of BDD by employing an incomplete balancing technique to approximate a coarse space problem and a diagonal scaling to precondition the local fine space problems instead of the Neumann-Neumann preconditioner. It may increase the number of iterations but reduces the computation costs of the precondition process for each iteration. Consequently, total computation time and re...
  • 703 Parallel Coupling Analysis of Subsidence, SHIOYA Ryuji, HONDA Atsushi, SALOMONE Valentina, SCHREFLER Bernhard, The Computational Mechanics Conference, 2005, (18) 521 - 522,   2005 11 17
  • 704 A Scalable Balancing Domain Decomposition Based Preconditioner for Large Scale Thermal-Solid Coupling Problems, MUKADDES A.M.M., OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, The Computational Mechanics Conference, 2005, (18) 523 - 524,   2005 11 17
  • Parallel processing performance of domain decomposition finite element method with parallel computers, OGINO Masao, MUKADDES A.M.M., URAKAMI Atsushi, SHIOYA Ryuji, KANAYAMA Hiroshi, 2004, (57) 89 - 90,   2004 03 19
  • Development of a Computer Network Utilization Type CAE System Using Java3D, ISHII Hiroki, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, The Computational Mechanics Conference, 2003, (16) 53 - 54,   2003 11 22
  • 133 Large Scale Thermal-Solid Coupling Parallel Finite Element Analysis Using Balancing Domain Decomposition, MUKADDES A. M. M., OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, The Computational Mechanics Conference, 2003, (16) 65 - 66,   2003 11 22
  • Earthquake Response Analysis of 3-D Large-Scale Complex Structure Using Balancing Domain Decomposition, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, YOSHIMURA Shinobu, The Computational Mechanics Conference, 2003, (16) 67 - 68,   2003 11 22
  • Large Scale Eigenvalue Analysis Using Component Modal Synthesis, SUEMUNE Hiroshi, SHIOYA Ryuji, KANAYAMA Hiroshi, The Computational Mechanics Conference, 2003, (16) 69 - 70,   2003 11 22
  • Parallel Erastic Finite Element Analysis Using the Balancing Domain Decomposition, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, YOSHIMURA Shinobu, Transactions of the Japan Society of Mechanical Engineers. A, 69, (685) 1360 - 1367,   2003 09 25 , The iterative Domain Decomposition Method (DDM) is one of the most effective parallel algorithm for large scale problems due to its excellent parallelism and variety of researches have already been done. As the iterative DDM satisfies continuity among subdomains through the iterative calculations, it is indispensable to reduce the number of iterations with a preconditioning technique especially for speed-up for computing. Thus, we have chosen the Balancing Domain Decomposition (BDD) proposed by J. Mandel. The BDD is a Neumann-Neumann type preconditioner with a coarse grid correction, and th...
  • A Stabilized Finite Element Method for Stationary Flow Problems Using an Iterative Domain Decomposition Method, 2003, (6) 209 - 210,   2003 08 05 , We try to develop a method to solve stationary flow problems. An iterative domain decomposition method is applied to finite element approximations of stationary Navier-Stokes equations. BiCGSTAB method is used as the iterative solver of the reduced linear system in each step of the Newton iteration. Also, a stabilized finite element method is used in each step of the nonlinear iteration. It is shown that results of the domain decomposition method agree well with results of conventional finite element method.
  • Round-Table Talk by Young Researchers, 'Past, Present and Future of Computational Engineering', OKUMURA Hiroshi, SAIKI Isao, SHIOYA Ryuji, NAGAI Gakuji, YAJIMA Hideoki, KASHIYAMA Kazuo, 8, (2) 2 - 8,   2003 04 30
  • A Finite Element Method of Stationary Flow Problems Using an Iterative Domain Decomposition Method, Kanayama Hiroshi, Shioya Ryuji, Tagami Daisuke, Kume Hirokazu, 2003, (56) 61 - 62,   2003 03 14
  • Visualization of Tissue Blood Flow Using 3D Ultrasound, SHIOYA Ryuji, NAKAMOTO Takeshi, KANAYAMA Hiroshi, SIMIZU Mayumi, 2003, (56) 259 - 260,   2003 03 14
  • Numerical Analysis of Eddy Current Problems Using the A-φ Method by Hierarchical Domain Decomposition Method, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, IMOTO Koichiro, 2003, (56) 275 - 276,   2003 03 14
  • A Large Scale Finite Element Analysis on Grid Computing using PC Cluster, SHIOYA Ryuji, IWASAKI Tomokazu, KANAYAMA Hiroshi, 2003, (56) 283 - 284,   2003 03 14
  • Development of a Computer Network Utilization Type CAE System, SHIOYA Ryuji, ISHII Hiroki, Ogino Masao, KANAYAMA Hiroshi, 2003, (56) 285 - 286,   2003 03 14
  • Large Scale Finite Element Analysis with a Balancing Domain Decomposition Method, Shioya Ryuji, Ogino Masao, Kanayama Hiroshi, Tagami Daisuke, 塩谷 隆二, 荻野 正雄, 金山 寛, 田上 大助, Key Engineering Materials, 243,   2003 01 , Progress in experimental and computational mechanics in engineering : proceedings of the International Conference on Experimental and Computational Mechanics in Engineering, Dunhuang, China, August 24-27, 2002This paper describes the parallel finite element analysis of large scale problems based on the Do-main Decomposition Method with preconditioner using Balancing Domain Decomposition for amassively parallel processors. In order to solve the issue of memory shortage and computationaltime, the developed system employs a dynamic load balancing and hierarchical distributed datamanagement tec...
  • Simple Parallel Programming Technique, SHIOYA Ryuji, The Computational Mechanics Conference, 2002, (15) 697 - 698,   2002 10 30
  • Large Scale Thermal-Solid Coupling Parallel Finite Element Analysis using ADVENTURE-Solid/Thermal, SHIOYA Ryuji, KANAYAM Hiroshi, IMAMURA Eita, The Computational Mechanics Conference, 2002, (15) 3 - 4,   2002 10 30
  • Parallel Finite Element Analysis on Massively Parallel Computer Using the Balancing Domain Decomposition Method, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, YOSHIMURA Shinobu, The Computational Mechanics Conference, 2002, (15) 73 - 74,   2002 10 30
  • Two Parent Normal Distribution Crossover for Ill-Scaled Functions and Its Evaluation, SHIOYA Ryuji, MORITA Kohei, KANAYAMA Hiroshi, Transactions of the Japan Society of Mechanical Engineers. A, 68, (670) 887 - 892,   2002 06 25 , In recent years, several crossover methods for Real-coded CA have been proposed. One of them, Unimodal Normal Distribution Crossover (UNDX) shows better performance than conventional methods in some benchmark tests. However, it becomes apparent that UNDX is not good in performance for ill-scaled functions. In this paper, a new crossover method. Two Parent Normal Distribution Crossover (TPNDX), which takes account of scaling is proposed and good performances are achieved for ill-scaled functions.
  • Parallel Large Scale Finite Element Analysis Using the Hierarchical Balancing Domain Decomposition Method, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, 7, (1) 211 - 212,   2002 05 20
  • A Study on Speed-up Technique for Parallel Finite Element Analysis of Structural Dynamics, SHIOYA Ryuji, TAMAI Ryoji, KANAYAMA Hiroshi, OISHI ATSUYA, 7, (1) 213 - 214,   2002 05 20
  • ADVNTURE_Magnetic FOR LARGE SCALE MAGNETIC ANALYSIS, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, JEONG Mihyun, 7, (2) 719 - 720,   2002 05 20
  • 338 Parallel Computing of Large Scale Eddy Current Problems Using a Domain Decomposition Method, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, Matsumoto Satoshi, The Computational Mechanics Conference, 2001, (14) 337 - 338,   2001 11 27 , A parallel computing with a hierarchical domain decomposition method is performed for three-dimensional eddy current problems. The magnetic vector potential, which is considered as the unknown complex function, is descretized by the Nedelec elements of simplex type. Numerical results show that the method is applicable for a problem, in which the number of complex degrees of freedom is about 500,000.
  • Investigation of effectiveness of Incomplete Cholesky factorization with an acceleration factor for BiCG method, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, MIYAMOTO Ryuji, 20,   2001 06 20
  • Numerical Analysis of 3-D Eddy Current Problems by the Hierarchical Domain Decomposition Method, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, SAITO Masahiro, 3,   2001 05 30
  • Parallel Finite Element Analysis of 100 Million DOFs Based on the Hierarchical Domain Decomposition Method, SHIOYA Ryuji, YAGAWA Genki, 3,   2001 05 30
  • Parallel Finite Element Analysis Based on the Hierarchical Balancing Domain Decomposition Method, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, 6, (1) 179 - 180,   2001 05 30
  • A Framework of Normal Distribution Crossover and its Application to Optimization Problems, SHIOYA Ryuji, KANAYAMA Hiroshi, MORITA Kohei, 6, (2) 759 - 762,   2001 05 30
  • 210 A Study on Speed-up Technique for Parallel Finite Element Analysis of Dynamic Problems, SHIOYA Ryuji, KANAYAMA Hiroshi, TAMAI Ryoji, OISHI Atsuya, 2001, (54) 53 - 54,   2001 03 05
  • 211 3D Heat-Structure Coupling Analysis Using a Domain Decomposition Method, SHIOYA Ryuji, KANAYAMA Hiroshi, HAMAKAWA Takeru, 2001, (54) 55 - 56,   2001 03 05
  • 212 A PARALLEL COMPUTING FOR MAGNETOSTATIC PROBLEMS WITH ITERATIVE DOMAIN DECOMPOSITION METHOD, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, HISAMITSU Motoki, 2001, (54) 57 - 58,   2001 03 05
  • 213 Development of Virtual Engineering System(VES) Using a Web Computing Technology, SHIOYA Ryuji, KANAYAMA Hiroshi, DOI Kenji, YAMADA Taigo, 2001, (54) 59 - 60,   2001 03 05
  • 11 million DOF's Large Scale Stress Analysis of Railway Bogie using PC Cluster, AKIBA Hiroshi, ISHIHARA Koichiro, YOSHIMURA Shinobu, SHIOYA Ryuji, 2001, (10) 84 - 87,   2001 01 16 , The authors have been developing a large scale parallel CAE system. This paper describes the solver, named MPCluster, along with the viewpoint of Domain Decomposition Method (DDM) and the parallel CG method and the 11 million DOF's stress analysis of a railway bogie on a PC cluster. We obtained remarkable results of the stress distribution, and the performance of the solver is clarified.
  • Parallel Large Scale Analysis Using the Balancing Domain Decomposition, OGINO Masao, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, The Computational Mechanics Conference, 2000, (13) 507 - 508,   2000 11 27
  • Correction of the electoric current density and application of iterative methods to electromagnetic field problems, TAGAMI Daisuke, KANAYAMA Hiroshi, SHIOYA Ryuji, YAMATANI Takaaki, The Computational Mechanics Conference, 2000, (13) 509 - 510,   2000 11 27
  • Numerical Analysis of Eddy Current Problems by Iterative Domain Decomposition Method, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, SAITO Masahiro, The Computational Mechanics Conference, 2000, (13) 511 - 512,   2000 11 27
  • Heat Conductive Analysis of One Million DOFs Problem with Hierarchical Domain Decomposition Method, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, ISHIKAWA Itaru, 2000, (2) 109 - 110,   2000 07 31 , This paper describes the parallel finite element analysis of large scale problems for a heat conductive problem using parallel computers. In order to solve the issue of memory shortage and computational time, the developed system employs a dynamic load balancing and hierarchical distributed data management technique. The present system is successfully applied to large FEM analyses of over two million d.o.f. (degrees of freedom) on a PC cluster parallel computer consisting of 16 processing units.
  • A Study of Developing an Automatic Visualization Module in a Virtual Engineering System, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, GOTO Takaaki, HIRAKIDA Tomohide, 2000, (2) 115 - 116,   2000 07 31 , The authors have developed a Virtual Engineering System (VES), which is a large scale engineering application system on a computer network, adopts the World Wide Web (WWW) browser as an integrated user interface, and includes not only technological information databases but also scientific technological computation systems and virtual plant experience systems. In VES which had made remoteness use of the calculation server to be a premise, on the visualization module, a realization of the advanced visualization was difficult in order to require the conversational environment with the user. I...
  • 3D Large Scale Structural Analysis using a Balancing Domain Decomposition Method, SHIOYA Ryuji, KANAYAMA Hiroshi, TAGAMI Daisuke, OGINO Masao, Transactions of the Japan Society for Computational Engineering and Science, 2,   2000 05 24
  • 401 A study of some iterative methods for complex symmetric linear systems, KANAYAMA Hiroshi, TAGAMI Daisuke, SHIOYA Ryuji, SAITO Masahiro, 2000, (53) 85 - 86,   2000 03 13 , We are now planning to extend our mixed formulation (A-φ method) of 3-D eddy current problems to large scale computations. However, it is very difficult to select a suitable iterative solver for this formulation. So, we introduce a modified iterative A-φ method (miA-φ method). This scheme needs to solve complex symmetric linear systems. In this paper, we report applications of the BiCG method to the miA-φ method.
  • 402 Parallel Computing of Large Scale Heat Conductive Problems by Hierarchical Domain Decomposition Method, SHIOYA Ryuji, KANAYAMA Hiroshi, ISHIKAWA Itaru, 2000, (53) 87 - 88,   2000 03 13
  • 403 NUMERICAL ANALYSIS OF MAGNETOSTATIC PROBLEMS BY HIERARCHICAL DOMAIN DECOMPOSITION METHOD, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, NAKIRI Takeshi, 2000, (53) 89 - 90,   2000 03 13
  • 410 Study of Automatic Mesh Generation with Internal Boundary usin 3-Dimensional Delaunay Triangulation, SHIOYA Ryuji, KANAYAMA Hiroshi, YODO Kaoru, 2000, (53) 103 - 104,   2000 03 13 , For 3-dimensional large scale finite element analysis, automating of mesh generation is one of important process for automating of whole finite element analysis system. But for 3-dimensional automatic mesh gemeration method with internal boundary surface has not been developed unlike for 2-dimensional one. In order to solve this issue, in this study we developed an automatic generation mesh system with internal boundary surface using 3-dimensional Delaunay triangulation.
  • 411 A Study of Developing a Virtual Engineering System in parallel and distributed computers, SHIOYA Ryuji, TAGAMI Daisuke, KANAYAMA Hiroshi, HIRAKIDA Tomohide, 2000, (53) 105 - 106,   2000 03 13 , VES(Virtual Engineering System) developed on the Internet is a simulation system that carries out thing-making on the computer network as a CAE(Computer Aided Engineering) system. VES is adopting the JAVA or CGI(Common Gateway Interface) for the interface between server and client through the network and applying to a variety of fields. In this study, as one of prototype of VES, a stress analysis system of beam model has been developed in parallel and distributed computers and technology of Web Computing and future plan of VES are discussed
  • Massively Parallel Elastic-Plastic Finite Element Analysis Using the Hierarchical Domain Decomposition Method, MIYAMURA Tomoshi, NOGUCHI Hirohisa, SHIOYA Ryuji, YOSHIMURA Shinobu, YAGAWA Genki, Transactions of the Japan Society of Mechanical Engineers. A, 65, (634) 1201 - 1208,   1999 06 25 , The hierarchical domain decomposition method (HDDM) is a solver for large scale algebraic equations in the finite element method. It is suitable for various kinds of parallel computers such as massively parallel processors (MPP) and workstation/PC clusters. In this study, the original HDDM is first modified to improve computation speed, and then applied to static elastic-plastic finite element analyses. Some key techniques employed in the static nonlinear finite element analysis are presented. As illustrative examples, the parallel elastic-plastic analyses are performed on a nuclear structu...
  • Parallel Finite Element Analysis with Internet, SHIOYA Ryuji, TAKUBO Hiroyuki, YAGAWA Genki, Transactions of the Japan Society of Mechanical Engineers. A, 65, (634) 1216 - 1223,   1999 06 25 , As computers can be connected to each other through the internet, we are able to use a remote computer even if it is located overseas in the same way as using a computer which is located nearby. This paper describes a parallel finite element system using the domain decomposition method, which is implemented on a computer network made from remote computers at the Internet. The above system was successfully applied to the 3 D structural analyses with a high parallel efficiency.
  • An Automatic Mesh Generation System for 3D model with Internal Boundary Surfaces, SHIOYA Ryuji, NISHIDA Masaki, KANAYAMA Hiroshi, YOSHIMURA Shinobu, YAGAWA Genki, AKIBA Hiroshi, 1999,   1999 06 14
  • Stress analysis of ten million DOFs problem using iterative domain decomposition method, SHIOYA Ryuji, YAGAWA Genki, 3, (1) 33 - 34,   1999 05 26
  • DEVELOPMENT OF FINITE ELEMENT ANALYSIS SYSTEM FOR 100 MILLIONS DOFS PROBLEMS, YOSHIMURA S., MIYAMURA T., SHIRAI I., FURUKAWA T., WADA Y., YAGAWA G., NOGUCHI H., SHIOYA R., 4, (1) 371 - 372,   1999 05 26
  • A Study of Speed-up Technique for DDM with a PCG Method, SHIOYA Ryuji, KANAYAMA Hiroshi, OGINO Masao, 4, (1) 383 - 384,   1999 05 26
  • AN APPLICATION OF THE SUBSTRUCTURING METHOD TO MAGNETIC FIELD ANALYSIS, KANAYAMA Hiroshi, SHIOYA Ryuji, TAGAMI Daisuke, NAKIRI Takeshi, SAITO Masahiro, 4, (1) 585 - 586,   1999 05 26
  • ELASTIC-PLASTIC ANALYSIS OF ONE MILLION DOF CUBIC STRUCTURE USING HIERARCHICAL DOMAIN DECOMPOSITION METHOD, MIYAMURA Tomoshi, NOGUCHI Hirohisa, SHIOYA Ryuji, YOSHIMURA Shinobu, YAGAWA Genki, 3, (1) 35 - 36,   1999 05 26
  • International Conference on Computational Engineering Science, SUETAKE Yoshitaka, IKEDA Toru, MIYAZAKI Yasuyuki, OKAZAWA Shigenobu, MAKIHARA Takafumi, SHIOYA Ryuji, ISOBE Daigoro, 4, (1) 28 - 31,   1999 03 30
  • Hand-Made Parallel Computer and Its Application to Computational Mechanics, SHIOYA Ryuji, YAGAWA Genki, Proceedings of the conference on computational engineering and science, 2, (1) 155 - 158,   1997 05 28
  • Domain Decomposition Method Using a Massively Parallel Computer : Application to an Elasto-Plastic Problem, SHIOYA Ryuji, YAGAWA Genki, 1, (1) 89 - 92,   1996 05 29
  • Domain Decomposition Method Using a Massively Parallel Computer--Application to an Elasto-Plastic Problem, Proceedings of the conference on computational engineering and science, 1, (1) 89 - 92,   1996 05
  • Massively Parallel Computing for Large Scale Finite Elements with Hierarchical Data Management, YAGAWA Genki, SHIOYA Ryuji, Journal of the Japan Society for Simulation Technology, 14, (3) 232 - 239,   1995 09 15 , This paper describes an implementation of finite elements on a massively parallel computer. Computer simulations such as FEM are about to take place of experiments in various fields. At the same time, the scale of a model to be solved tends to be large and complex. In order to analyze such large scale and complex problems within limited memory and processing time, parallel computing seems promising. We have developed a parallel finite element system on a massively parallel computer, nCUBE2 consisting of 128 processing units. As a parallel numerical algorithm for the finite element analyses,...

Conference Activities & Talks

  • 超大規模解析のための高精細可視化ライブラリの開発, 和田義孝, 河合浩志, 塩谷隆二, 計算工学講演会論文集(CD-ROM),   2013 06 19

Awards & Honors

  •   2013 , JACM, JACM Fellows Award
  •   2013 , JSME, JSME Computational Mechanics Achievement Award
  •   2017 , Japan Society for Computational Engineering and Science (JSCES), The Kawai Medal

Research Grants & Projects

  • Parallel Finite Element Analyses for Large Scale Problems