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OKAMOTO Yoshifumi
Faculty of Science and Engineering Department of Electrical and Electronics Engineering
Professor
Researchmap URL
https://researchmap.jp/7000011715
Researcher information
■ Degree
■ Research Keyword
■ Field Of Study
■ Research Keyword
■ Field Of Study
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Design engineering, Computational Electromagnetics
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Electrical power engineering, Electrical Machines Engineering
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Measurement engineering, Electromagnetics Engineering
- Natural sciences, Applied mathematics and statistics, Computational Electromagnetics
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Machine elements and tribology
- Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Design engineering, Design Optimization
Career
■ Career
■ Member History
- Apr. 2018 - Present
法政大学 理工学部 教授, 理工学部 電気電子工学科, 教授 - Apr. 2017 - Mar. 2019
早稲田大学, 理工学術院, 非常勤講師 - Apr. 2015 - Mar. 2018
法政大学 理工学部 准教授, 理工学部 電気電子工学科, 准教授 - Apr. 2010 - Mar. 2015
Assistant Professor, Department of Electrical and Electronic Systems Engineering, Utsunomiya University, 大学院工学研究科 電気電子システム工学専攻, 助教 - Apr. 2013 - Sep. 2013
グラーツ工科大学, 電気工学基礎理論研究所, 訪問研究員 - Apr. 2013 - Sep. 2013
（墺）グラーツ工科大学 電気工学基礎理論研究所 訪問研究員 - Oct. 2009 - Mar. 2010
Assistant Professor, Advanced Interdisciplinary Science, Utsunomiya University, 大学院工学研究科 学際先端システム工学専攻, 助教 - 01 Apr. 2008 - 30 Sep. 2009
同志社大学 電磁エネルギー応用研究センター 嘱託研究員 - Apr. 2008 - Sep. 2009
同志社大学 電磁エネルギー応用研究センター 嘱託研究員, 電磁エネルギー応用研究センター, 嘱託研究員 - 01 Apr. 2005 - 31 Mar. 2008
理化学研究所 協力研究員 - Apr. 2005 - Mar. 2008
理化学研究所 協力研究員 - 理化学研究所, 情報基盤センター, 協力研究員
- 大分県産業創造機構, 研究員（研究拠点：同志社大学）
■ Member History
- Apr. 2024 - Present
電磁気応用部門 幹事, 日本非破壊検査協会 - Apr. 2015 - Present
学会活動推進員（東京支部）, 電気学会 - Oct. 2024 - Sep. 2027
電力シフトに向けた磁気応用技術を用いたエネルギー変換システム調査専門委員会, 電気学会 - Apr. 2024 - Mar. 2027
電磁界解析の高度利用と AI の活用による回転機の先進最適化・性能評価技術調査専門委員会, 電気学会 - Apr. 2023 - Mar. 2025
電磁非破壊検査を支援する逆問題解析に関する調査研究委員会, 日本非破壊検査協会 - Apr. 2022 - Mar. 2025
電磁界解析の先進技術応用調査専門委員会, 電気学会 - Oct. 2021 - Sep. 2024
カーボンニュートラルに向けたエネルギー変換システム磁気応用技術調査専門委員会, 電気学会 - Apr. 2022 - Mar. 2024
電磁界解析による回転機の高精度モデリングと先進最適化技術調査専門委員会, 電気学会 - Apr. 2021 - Mar. 2024
カーボンニュートラルに向けたエネルギー変換システム磁気応用技術調査専門委員会, 電気学会 - Oct. 2018 - Jun. 2022
全国大会グループ委員会, 電気学会 - Apr. 2019 - Mar. 2022
電磁界解析による回転機の高精度性能評価技術調査専門委員会, 電気学会 - Apr. 2019 - Mar. 2022
電磁界解析の先進技術応用調査専門委員会, 電気学会 - Apr. 2015 - Jun. 2021
電気学会東京支部学生員委員会, 電気学会 - Apr. 2018 - Mar. 2021
高密度エネルギー変換システムのための磁気応用技術調査専門委員会, 電気学会 - Apr. 2016 - Mar. 2019
電磁界解析の高精度化技術調査専門委員会, 電気学会 - Apr. 2016 - Mar. 2019
回転機電磁界解析の実用的総合評価技術調査専門委員会, 電気学会 - Apr. 2015 - Mar. 2018
エネルギー変換システムの高効率・高機能化のための磁気応用技術調査専門委員会, 電気学会 - Apr. 2013 - Mar. 2016
回転機電磁界解析に関する高度先端技術調査専門委員会, 電気学会 - Apr. 2013 - Mar. 2016
先進電磁界解析による設計高度化技術調査専門委員会 幹事, 電気学会 - Apr. 2013 - Mar. 2015
基礎・材料・共通部門編修委員会, 電気学会 - Apr. 2012 - Mar. 2015
高効率エネルギー変換のための磁気応用技術調査専門委員会 委員, 電気学会 - Apr. 2009 - Mar. 2014
論文委員会A1グループ, 電気学会 - Apr. 2011 - Mar. 2013
回転機の三次元電磁界解析実用化技術調査専門委員会, 電気学会 - Apr. 2010 - Mar. 2013
電磁界解析高度利用技術調査専門委員会 委員, 電気学会 - Mar. 2010 - Mar. 2011
電磁界解析による回転機の実用的性能評価技術調査専門委員会, 電気学会 - Apr. 2007 - Mar. 2010
電磁界数値解析の有効利用技術調査専門委員会 幹事補佐, 電気学会 - Oct. 2005 - Mar. 2007
実規模電磁界解析のための数値計算技術調査専門委員会 委員, 電気学会
Research activity information
■ Award
■ Lectures, oral presentations, etc.
■ Academic Contribution Activities
- Mar. 2013
一般財団法人 丸文財団 第16回「交流研究助成金」 - Apr. 2012
一般財団法人 関東電気保安協会 研究助成 - Mar. 2010
電気学会, 電気学会優秀論文発表賞B賞 - Feb. 2004
電気学会, 電気学会優秀論文発表賞A賞
- Magnetization Estimation Technique of Permanent Magnets Loaded on Rotor of IPMSM Using Actual Measurement Value of Leakage Flux
Narichika Nakamura; Masahide Shioyama; and Yoshifumi Okamoto
IEEE Access, Jan. 2025, [Reviewed]
Last, Corresponding - Reduction of Memory Consumption in Time Domain Adjoint Variable Method for Topology Optimization of Squirrel-cage Induction Motor Driven by Pulse Width Modulation Inverter
Ryuichiro Hirata; and Yoshiufmi Okamoto
IEEJ Journal of Industry Applications, 01 Jan. 2025, [Reviewed]
Last, Corresponding - Error Correction Method for Improvement of Calculation Accuracy of Electromagnetic Force Analysis in Magnetostatic Field Using Nodal Force Method
Yoshifumi Okamoto; Akira Ahagon; Yoshitaka Kida; Kazuki Semba; and Takashi Yamada
IEEJ Journal of Industry Applications, 01 Jan. 2025, [Reviewed]
Lead, Corresponding - Estimation of Magnetization State of Locally Demagnetized Permanent Magnet Using Pinching-Type Sigmoid-Function-Based Gradient Method (P-SiGrad)
Shunsuke Yamaguchi; Narichika Nakamura; and Yoshifumi Okamoto
IEEE Transactions on Magnetics, 01 Jul. 2024, [Reviewed]
Last - Inverse Estimation Method of Permanent Magnet Magnetization Using No-load Back Electromotive Force of Permanent Magnet Synchronous Motor
Hajime Suzuki; Yoshifumi Okamoto
IEEJ Transactions on Industry Applications, Apr. 2024, [Reviewed]
Last, Corresponding - Fast-sensing System of Permanent Magnet Magnetization Using Matrix-arranged Hall Sensors Combined with Deep Neural Network
Masahide Shioyama; and Yoshifumi Okamoto
IEEE Sensors Letters, 01 Apr. 2024, [Reviewed]
Last, Corresponding - Magnetization Estimation of Permanent Magnet Using Leakage Flux Derived from Rotor of SPMSM after Post-assembly Magnetization
Narichika Nakamura; Yoshifumi Okamoto
IEEJ Transactions on Industry Applications, Jul. 2023, [Reviewed]
Last, Corresponding - Sensitivity-based topology optimization of squirrel-cage induction motor in time domain using multi-material level-set method
Masaki Yamano; Kazuya Katayama; and Yoshifumi Okamoto
IEEE Transactions on Magnetics, 01 Dec. 2022, [Reviewed]
Last, Corresponding - Magnetization estimation method for permanent magnet based on mathematical programming combined with sigmoid function
Narichika Nakamura; Yoshifumi Okamoto; Kenta Osanai; Satoshi Doi; Tetsuya Aoki; and Keichi Okazaki
IEEE Transactions on Magnetics, 01 Sep. 2022, [Reviewed]
Corresponding - Topology Optimization of DC-biased Pot-type Reactor Using Design Sensitivity in Steady State of Electromagnetic Field with Magnetic Nonlinearity
Yoshifumi Okamoto
International Journal of Applied Electromagnetics and Mechanics, 05 Jul. 2022, [Reviewed]
Lead, Corresponding - Multi-material Structural Optimization of IPM Motor Using Phased Application of Density and Leve-set Method
Yuki Yamashita; Riku Koda; Kazuya Katayama; and Yoshifumi Okamoto
IEEJ Transactions on Industry Applications, 01 Sep. 2021, [Reviewed]
Last, Corresponding - Evaluation of localized heat transfer coefficient for induction heating apparatus by thermal fluid analysis based on the HSMAC method
Satoshi Namiki; Tomoya Iino; and Yoshifumi Okamoto
Open Physics, Aug. 2020, [Reviewed] - Design Optimization of Synchronous Reluctance Motor for Reducing Iron Loss and Improving Torque Characteristics Using Topology Optimization Based on Level-set Method
Yuki Yamashita; and Yoshifumi Okamoto
IEEE Transactions on Magnetics, 01 Mar. 2020, [Reviewed]
Last, Corresponding - Nondestructive Estimation of Magnetization Distribution in Permanent Magnet Using Quasi-Newton Method Based on 2-D Fourier Series Expansion
Narichika Nakamura; Yoshifumi Okamoto; Kenta Osanai; Satoshi Doi; Tetsuya Aoki; and Keichi Okazaki
IEEE Transactions on Magnetics, Jan. 2020, [Reviewed]
Corresponding - Enhancement of Convergence Characteristics of Newton-Raphson Method with Line Search for Nonlinear Eddy Current Analysis Based on Time-periodic FEM
Shimpei Kakita and Yoshifumi Okamoto
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Oct. 2019, [Reviewed] - Performance of Krylov Subspace Method with SOR Preconditioner Supported by Eisenstat’s Technique for Linear System Derived from Time-periodic FEM
Makoto Kumagai; Shimpei Kakita and Yoshifumi Okamoto
COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Oct. 2019, [Reviewed] - Diagnosis Method of Magnetization Distribution in Permanent Magnet Using Approximate Function Based on 1-D Fourier Series Expansion
Yoshifumi Okamoto; Narichika Nakamura; Kenta Osanai; Satoshi Doi; Tetsuya Aoki; Keichi Okazaki
IEEE Transactions on Magnetics, Jun. 2019, [Reviewed] - Average-torque-maximization and cogging-torque-minimization of permanent-magnet-assisted synchronous reluctance motor using topology optimization
Reiya Suzukia; Yoshifumi Okamoto; Shinji Wakao
International Journal of Applied Electromagnetics and Mechanics, Jun. 2019, [Reviewed] - Multistage Topology Optimization of Induction Heating Apparatus in Time Domain Electromagnetic Field with Magnetic Nonlinearity
Hiroshi Masuda; Yoshifumi Okamoto; Shinji Wakao
COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, Jun. 2019, [Reviewed] - トポロジー最適化による球殻電磁シールドの遮蔽性能向上に関する検討
増田弘; 岡本吉史; 若尾真治
電子情報通信学会論文誌 C（エレクトロニクス）, May 2019, [Reviewed]
Corresponding - Factor Analysis of Torque Ripple Reduction in Synchronous Reluctance Motors Derived from Topology Optimization
Hiroyuki Kaimori; Yoshifumi Okamoto; Shinji Wakao
IEEJ Transactions on Industry Applications, Apr. 2019, [Reviewed] - Topology Optimization of Magnetic Shielding Using Level-set Function Combined with Element-based Topological Derivatives
Reona Hoshino; Yoshifumi Okamoto; and Shinji Wakao
COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2018, [Reviewed] - Improvement of Topology Optimization Method Based on Level Set Function in Mangetic Field Problem
Yoshifumi Okamoto; Hiroshi Masuda; Yutaro Kanda; Reona Hoshino; and Shinji Wakao
COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 2018, [Reviewed] - Improvement of Block IC Preconditioner Using Fill-in Technique for Linear Systems Derived from Finite Element Method Including Thin Elements
Tomonori Tsuburaya; Yoshifumi Okamoto; and Zhiqi Meng
IEEE Transactions on Magnetics, 2018, [Reviewed] - Improvement of Torque Characteristics for a Synchronous Reluctance Motor Using MMA-based Topology Optimization Method
Yoshifumi Okamoto; Reona Hoshino; Shinji Wakao; and Tomonori Tsuburaya
IEEE Transactions on Magnetics, 2018, [Reviewed] - Design optimization of primary core in induction heating roll by the combination of 2D level-set method and 3D coupled magnetic-Thermal FEM
Kazuki Hirono; Reona Hoshino; Tsuyoshi Kamiya; Shinji Wakao; Yoshifumi Okamoto; Woojin Jeon
IEEJ Journal of Industry Applications, 2018, [Reviewed] - Topology optimization of induction heating model using sequential linear programming based on move limit with adaptive relaxation
Hiroshi Masuda; Yutaro Kanda; Yoshifumi Okamoto; Kazuki Hirono; Reona Hoshino; Shinji Wakao; Tomonori Tsuburaya
Open Physics, 29 Dec. 2017, [Reviewed] - Fast Computation of Linear Systems Based on Parallelized Preconditioned MRTR Method Supported by Block-Multicolor Ordering in Electromagnetic Field Analysis Using Edge-Based Finite Element Method
Tomonori Tsuburaya; Yoshifumi Okamoto; Shuji Sato
ELECTRONICS AND COMMUNICATIONS IN JAPAN, Aug. 2017, [Reviewed] - Convergence Acceleration of Topology Optimization Based on Constrained Level Set Function Using Method of Moving Asymptotes in 3-D Nonlinear Magnetic Field Analysis
Yoshifumi Okamoto; Hiroshi Masuda; Yutaro Kanda; Reona Hoshino; and Shinji Wakao
IEEE Transactions on Magnetics, 2017, [Reviewed] - Fast computation of linear systems based on parallelized preconditioned MRTR method supported by block-multicolor ordering in electromagnetic field analysis using edge-based finite element method
Tomonori Tsuburaya; Yoshifumi Okamoto; Shuji Sato
IEEJ Transactions on Fundamentals and Materials, 2016, [Reviewed] - 辺有限要素法による電磁界解析におけるブロックマルチカラーオーダリングを援用した並列化前処理付きMRTR法に基づく線形方程式求解の高速化
圓谷友紀; 岡本吉史; 里周二
電気学会論文誌A, 2016, [Reviewed] - Topology Optimization Based on Regularized Level Set Function for Solving 3-D Nonlinear Magnetic Field System with Spatial Symmetric Condition
Yoshifumi Okamoto; Shinji Wakao; and Shuji Sato
IEEE Transactions on Magnetics, 2016, [Reviewed] - Parallelization performance of preconditioned COMRTR method supported by multicolor ordering in complex symmetric linear systems derived from frequency-domain: Electromagnetic field analysis using edge-based finite element method
Tomonori Tsuburaya; Yoshifumi Okamoto; Shuji Sato
IEEJ Transactions on Power and Energy, 01 Dec. 2015, [Reviewed] - Fast nonlinear finite element analysis using Newton-Raphson method implemented by Krylov subspace method with relaxed convergence criterion
Yoshifumi Okamoto; Akihisa Kameari; Koji Fujiwara; Tomonori Tsuburaya; Shuji Sato
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, 2015, [Reviewed], [Invited] - Parallelized ICCG method using block-multicolor orderings in real symmetric linear system derived from voltage-driven FEM in time domain
Tomonori Tsuburaya; Yoshifumi Okamoto; Shuji Sato
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, 2015, [Reviewed] - 辺有限要素法による周波数領域電磁界解析から得られる複素対称線形方程式におけるマルチカラーオーダリングを使用した前処理付きCOMRTR法の並列性能
圓谷友紀; 岡本吉史; 里周二
電気学会論文誌B, 2015, [Reviewed] - Material-density-based Topology Optimization with Magnetic Nonlinearity by Means of Stabilized Sequential Linear Programming: SLPSTAB
Yoshifumi Okamoto; Yu Matsubayashi; Shinji Wakao; and Shuji Sato
IEEE Transactions on Magnetics, 2015, [Reviewed] - Parallelization of Preconditioned MRTR Method with Eisenstat’s Technique by Means of Algebraic Multicolor Ordering
Tomonori Tsuburaya; Yoshifumi Okamoto; and Shuji Sato
IEEE Transactions on Magnetics, 2015, [Reviewed] - Two-step topology optimization using topology constraint for improving the diversity of solution
Yu Matsubayashi; Takumi Nagano; Shinji Wakao; Yoshifumi Okamoto
IEEJ Transactions on Power and Energy, 01 Jan. 2014 - Topology design method of flux barrier in IPM motor by means of genetic algorithm implemented by multistep procedure
Yoshifumi Okamoto; Yusuke Tominaga; Shinji Wakao; Shuji Sato
INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS, 2014, [Reviewed] - 辺要素有限要素解析から得られる実対称線形方程式求解におけるICCG法の実用的実装の検討
岡本吉史; 高橋康人; 藤原耕二; 阿波根明; 美舩健; 岩下武史
電気学会論文誌B, 2014, [Reviewed] - Topology optimization of magnetostatic shielding using multistep evolutionary algorithms with additional searches in a restricted design space
Yoshifumi Okamoto; Yusuke Tominaga; Shinji Wakao; Shuji Sato
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, 2014, [Reviewed] - 磁気回路設計における解の多様性向上のための二段階位相最適化手法
松林祐; 永野拓身; 若尾真治; 岡本吉史
電気学会論文誌B, 2014, [Reviewed] - Performance of Preconditioned Linear Solvers Based on Minimum Residual for Complex Symmetric Linear Systems
Tomonori Tsuburaya; Yoshifumi Okamoto; Koji Fujiwara; and Shuji Sato
IEEE Transactions on Magnetics, 2014, [Reviewed] - Topology Optimization of Rotor Core Combined with Identification of Current Phase Angle in IPM Motor Using Multistep Genetic Algorithm
Yoshifumi Okamoto; Yusuke Tominaga; Shinji Wakao; and Shuji Sato
IEEE Transactions on Magnetics, 2014, [Reviewed] - Improvements in Material-density-based Topology Optimization for 3-D Magnetic Circuit design by FEM and Sequential Linear Programming Method
Yoshifumi Okamoto; Yusuke Tominaga; Shinji Wakao; and Shuji Sato
IEEE Transactions on Magnetics, 2014, [Reviewed] - Improvement of the Preconditioned MRTR Method With Eisenstat's Technique in Real Symmetric Sparse Matrices
Tomonori Tsuburaya; Yoshifumi Okamoto; Koji Fujiwara; Shuji Sato
IEEE TRANSACTIONS ON MAGNETICS, May 2013, [Reviewed] - Parameters Determination for a.c. Voltage and Current Waveforms Generated by IEC 61083-4 TDG
Shuji Sato; Yuya Saikawa; Seisuke Nishimura; Hiroyuki Shimizu; Yoshifumi Okamoto; Hisatoshi Ikeda
IEEJ Transactions on Power and Energy, 2013, [Reviewed] - Binary-based topology optimization of magnetostatic shielding by a hybrid evolutionary algorithm combining genetic algorithm and extended compact genetic algorithm
Yusuke Tominaga; Yoshifumi Okamoto; Shinji Wakao; Shuji Sato
IEEE Transactions on Magnetics, 2013, [Reviewed] - Layout Optimization Method for Magnetic Circuit Using Multistep Utilization of Genetic Algorithm Combined with Design Space Reduction
Yoshifumi Okamoto; Yusuke Tominaga; Shuji Sato
ELECTRICAL ENGINEERING IN JAPAN, Nov. 2012, [Reviewed] - Topological Design for 3-D Optimization Using the Combination of Multistep Genetic Algorithm with Design Space Reduction and Nonconforming Mesh Connection
Yoshifumi Okamoto; Yusuke Tominaga; Shuji Sato
IEEE TRANSACTIONS ON MAGNETICS, Feb. 2012, [Reviewed] - Layout optimization method for magnetic circuit using multi-step utilization of genetic algorithm combined with design space reduction
Yoshifumi Okamoto; Yusuke Tominaga; Shuji Sato
IEEJ Transactions on Power and Energy, 2011, [Reviewed] - 遺伝的アルゴリズムの多段階使用と設計空間の縮減を併用した磁気回路の形態最適化手法の提案
岡本吉史; 富永悠介; 里周二
電気学会論文誌B, 2011, [Reviewed] - Effectiveness of Higher Order Time Integration in Time-Domain Finite-Element Analysis
Yoshifumi Okamoto; Koji Fujiwara; Yoshiyuki Ishihara
IEEE TRANSACTIONS ON MAGNETICS, Aug. 2010, [Reviewed] - Evaluation of Inductance of Reactor Excited by DC-Biased Current with Very Small AC Component Taking Account of Incremental Permeability on Minor Hysteresis Loop
Yoshifumi Okamoto; Kenji Maeda; Koji Fujiwara; Yoshiyuki Ishihara
COMPUTER FIELD MODELS OF ELECTROMAGNETIC DEVICES, 2010, [Reviewed] - Exact Minimization of Energy Functional for NR Method with Line-Search Technique
Yoshifumi Okamoto; Koji Fujiwara; and Ryutaro Himeno
IEEE Transactions on Magnetics, 01 Mar. 2009, [Reviewed] - A dielectric heating analysis method with accurate rotational motion of stirrer fan using nonconforming mesh connection
Yoshifumi Okamoto; Ryutaro Himeno; Kiminori Ushida; Akira Ahagon; Koji Fujiwara
IEEE TRANSACTIONS ON MAGNETICS, Jun. 2008, [Reviewed] - Minimization of driving force ripple of linear motor for rope-less elevator using topology optimization technique
Yoshifumi Okamoto; Norio Takahashi
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, Jan. 2007, [Reviewed] - Investigation of topology optimization of magnetic circuit using density method
Yoshifumi Okamoto; Norio Takahashi
Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), 30 Apr. 2006, [Reviewed] - 3-D topology optimization of single-pole-type head by using design sensitivity analysis
Y Okamoto; K Akiyama; N Takahashi
IEEE TRANSACTIONS ON MAGNETICS, Apr. 2006, [Reviewed] - The Newton-Raphson method accelerated by using a line search - Comparison between energy functional and residual minimization
K Fujiwara; Y Okamoto; A Kameari; A Ahagon
IEEE TRANSACTIONS ON MAGNETICS, May 2005, [Reviewed] - Magnetic shield design of perpendicular magnetic recording head by using topology optimization technique
Y Okamoto; M Ohtake; N Takahashi
IEEE TRANSACTIONS ON MAGNETICS, May 2005, [Reviewed] - A Novel Topology Optimization of Nonlinear Magnetic Circuit Using ON/OFF Method
Yoshifumi Okamoto; Norio Takahashi
IEEJ Transactions on Fundamentals and Materials, 2005, [Reviewed] - Investigation of Topology Optimization of Magnetic Circuit by Using Density Method
Yoshifumi Okamoto; Norio Takahashi
IEEJ Transactions on Industry Applications, 01 Sep. 2004, [Reviewed] - 密度法を用いた磁気回路の位相最適化手法に関する基礎的検討
岡本吉史; 高橋則雄
電気学会論文誌D, 2004, [Reviewed] - Optimal design of induction heating equipment for high-speed processing of a semiconductor
Y Okamoto; T Imai; D Miyagi; N Takahashi; K Ozaki; H Ono; N Uchida
COMPEL-THE INTERNATIONAL JOURNAL FOR COMPUTATION AND MATHEMATICS IN ELECTRICAL AND ELECTRONIC ENGINEERING, 2004, [Reviewed] - 進化戦略を用いた電力ケーブル接続部の汎用的電界最適設計
米津大吾; 岡本吉史; 原武久; 島田茂樹; 鍜治幹雄
電気学会論文誌C, 2003, [Reviewed]
- Non-destructive Estimation for Magnetization Distribution in Permanent Magnet Using Deep Learning
五十嵐一輝; 佐々木秀徳; 塩山将英; 中村勢到; 岡本吉史
電気学会全国大会講演論文集(CD-ROM), 2023 - A Study on Estimation Method for Magnetization Distribution in Permanent Magnet Using Deep Learning
高須大地; 佐々木秀徳; 中村勢到; 岡本吉史
電気学会研究会資料(Web), 2022 - Topology optimization of IH-equipment using heaviside function in 2-D axisymmetric electromagnetic field
Hiroshi Masuda; Yutaro Kanda; Yoshifumi Okamoto; Kazuki Hirono; Reona Hoshino; Shinji Wakao; Tomonori Tsuburaya
2017 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering, ISEF 2017, 30 Oct. 2017 - Influence of Characteristic Functions on the Converged Solution Derived from Topology Optimization in 2-D Electromagnetic Field System
増田 弘; 神田 雄太郎; 岡本 吉史; 星野 玲央奈; 若尾 真治; 圓谷 友紀
電気学会研究会資料. RM, 18 Jan. 2017 - Some perforation strategies in level-set method for topology optimization of magnetic shielding
星野 玲央奈; 廣野 数樹; 神谷 剛志; 若尾 真治; 岡本 吉史; 圓谷 友紀
電気学会研究会資料. RM, 18 Jan. 2017 - On smoother based on Laplacian method for uneven surface derived from 3-D topology optimization of electrical machinery in magnetic field system
Yutaro Kanda; Yoshifumi Okamoto; Hiroshi Masuda; Shinji Wakao
Simulation for Additive Manufacturing 2017, Sinam 2017, 01 Jan. 2017 - 特集 電力・電気機器における電磁界数値解析技術の最新動向－4 電力・電気機器の最適化
岡本吉史
電気学会誌, 2017, [Reviewed], [Invited] - Improvement of Convergence Characteristics of Topology Optimization Based on Level Set Function Using the Method of Moving Asymptotes on Nonlinear Magnetic Field Problem
岡本 吉史; 増田 弘; 星野 玲央奈; 若尾 真治
電気学会研究会資料. RM, 07 Sep. 2016 - Topology Optimization of Magnetic Shield Using Level-set Method Introducing the Concept of Hole Sensitivity
星野 玲央奈; 神谷 剛志; 若尾 真治; 岡本 吉史
電気学会研究会資料. RM, 07 Sep. 2016 - Level-set-function-based Topology Optimization Supported by the Method of Moving Asymptotes in a Magnetic Field Problem
Yoshifumi Okamoto; Shinji Wakao
2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC), 2016, [Reviewed] - Parallelization Performance of Robust Incomplete Factorization Preconditioner for Real Symmetric Linear Systems Arising in Magnetic Field Analyses
Tomonori Tsuburaya; Yoshifumi Okamoto; Zhiqi Meng
2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC), 2016, [Reviewed] - Multi-Objective Design Optimization of Primary Core in Induction Heating Roll by Level-set Method
Kazuki Hirono; Reona Hoshino; Shinji Wakao; Yoshifumi Okamoto; W. Jeon
2016 IEEE CONFERENCE ON ELECTROMAGNETIC FIELD COMPUTATION (CEFC), 2016, [Reviewed] - 調査研究委員会レポート 先進電磁界解析による設計高度化技術調査専門委員会
五十嵐一; 阿波根明; 岡本吉史; 米津大吾
電気学会 電力・エネルギー部門ニュースレター, 2015, [Reviewed], [Invited] - Magnetic Circuit Design Supported by Topology Optimization Method Based on Material Density by Means of Sequential Linear Programming
TOMINAGA Yusuke; OKAMOTO Yoshifumi; WAKAO Shinji; SATO Shuji
電気学会研究会資料. SA, 静止器研究会, 24 Jan. 2013 - The Electromagnetic Wave Analysis with Nonconforming Mesh Connection in Frequency Domain by Using Edge-Based Finite Element Method
岡本吉史; 姫野龍太郎; 丑田公規; 阿波根明; 藤原耕二
電気学会静止器研究会資料, 2007 - The Dielectric Heating Analysis with Rotational Motion of Stirrer Fanby Using Finite Element Method
岡本吉史; 姫野龍太郎; 丑田公規; 阿波根明; 藤原耕二
電気学会静止器研究会資料, 2007 - The Coupled Analysis of High Frequency Electromagnetic Field Propagation and Heat Conduction with Temperature-Dependent Nonlinear Permittivity
岡本吉史; 姫野龍太郎; 丑田公規; 阿波根明
電気学会静止器研究会資料, 2006 - 十見百聞 電気で作る学校給食
藤原耕二; 岡本吉史
電気学会誌, 2002, [Reviewed], [Invited]
■ Lectures, oral presentations, etc.
- 永久磁石同期電動機の漏れ磁束を活用したレアアース磁石の非破壊磁化推定システムの開発
岡本吉史
パワーアカデミー研究助成成果報告会, 18 Mar. 2025, 電気学会 全国大会, [Invited] - 「法政大学のカーボンニュートラルアクション」，,「先端産業を支える永久磁石磁化状態の見える化,―基礎研究から社会実装への展開―」
岡本吉史
法政科学技術フォーラム 2024, 01 Mar. 2024, 法政大学理系学部・研究所, [Invited] - 永久磁石磁化分布の非破壊推定
岡本吉史
日本非破壊検査協会 九州支部 技術サロン, 07 Jul. 2023, 日本非破壊検査協会, [Invited] - ICCG 法の実用的実装法
岡本吉史
電力・エネルギーフォーラム：「電磁界解析高度利用技術」, 18 Nov. 2014, 電気学会, [Invited] - Fast Nonlinear Finite Element Analysis Using Krylov Subspace Method with Relaxed Convergence Criterion
Yoshifumi Okamoto; Koji Fujiwara; Akihisa Kameari; Tomonori Tsuburaya; Shuji Sato
The 16th International IGTE Symposium on Numerical Field Calculation in Electrical Engineering, Sep. 2014, IGTE, Graz University of Technology, [Invited] - 電気機器最適化の基礎
岡本吉史
電力・エネルギーフォーラム 第23回電磁界数値解析に関するセミナー：「設計高度化のための電磁界解析の基礎と応用」, Jan. 2014, 電気学会, [Invited] - シールド解析・高周波解析
岡本吉史
電力・エネルギーフォーラム 第19回電磁界数値解析に関するセミナー：「電磁界解析の難所とその攻略法」, Jul. 2009, 電気学会, [Invited] - 有限要素法を用いた基礎電磁界解析
岡本吉史
大分科学技術研究会, Feb. 2009, [Invited] - 非線形問題の高速計算テクニック
岡本吉史
第17回電磁界数値解析に関するセミナー：「電磁界数値解析のためのチュートリアル」, Jan. 2008, 電気学会
- Apr. 2021
法政大学 - Apr. 2021
法政大学 - 早稲田大学先進理工学研究科
- 法政大学大学院
- 宇都宮大学
- 宇都宮大学
- 宇都宮大学
- 宇都宮大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学
- 法政大学大学院
- 法政大学大学院
- 法政大学大学院
- 法政大学大学院
- 法政大学
- 法政大学大学院
- 法政大学大学院
- 法政大学
- Jul. 2022 - Present
The Japanese Society for Non-destructive Inspection - Apr. 2016 - Present
電気学会 上級会員 - Sep. 2012 - Present
IEEE Magnetics Society - Sep. 2012 - Present
IEEE - Aug. 2009 - Present
進化計算学会 - Apr. 2005 - Present
電気学会 正員 - Aug. 1999 - Present
電気学会 - Apr. 2014 - Mar. 2024
日本計算工学会 - Mar. 2013 - Aug. 2023
International COMPUMAG Society - Apr. 2011 - Mar. 2022
進化計算学会 - Aug. 1999 - Mar. 2005
電気学会 学生員
- 永久磁石同期電動機の漏れ磁束を活用したレアアース磁石の非破壊磁化推定システムの開発
Feb. 2023 - Mar. 2025 - 電動化車両の電磁環境性能向上に資する電磁シールドの超軽量・高剛性・多周波化設計
Apr. 2022 - Mar. 2023 - 補償回路を内蔵したIG出力波形の解析の提案とIEC 60060-1
基盤研究(C)
Apr. 2020 - Mar. 2023 - 電気機器の時空間電磁界現象を忠実に模擬した高速高精度設計最適化手法の開発
基盤研究(C)
Apr. 2019 - Mar. 2022 - 実規模機器に対するマルチフィジックス高速トポロジー最適化設計システムの創成
基盤研究(B)
Apr. 2019 - Mar. 2022 - 電磁界数値解析とトポロジー最適化を併用した電気機器の革新的最適設計システムの構築
基盤研究(C)
Apr. 2016 - Mar. 2019 - 制動容量型高性能分圧器の開発
基盤研究(C)
Apr. 2014 - Mar. 2017 - 圧粉磁芯モータの低損失・高出力磁気回路実現のための創発的位相最適化手法の開発
若手研究(B)
Apr. 2013 - Mar. 2015 - 一般財団法人丸文財団 第16回（平成24年度）「交流研究助成金」助成：「省エネルギー社会を目指した電気モータの低消費電力設計のためのマルチフィジクス位相最適化手法の開発」
Apr. 2013 - Mar. 2014 - 平成24年度 一般財団法人関東電気保安協会研究助成：「位相最適化計算によるギャップ磁束の有効利用に基づく同期リラクタンスモータの低騒音・高効率設計」
Apr. 2012 - Mar. 2013 - 磁性材料最適配置計画法の開発と圧粉磁芯モータの最適形態シミュレーションへの挑戦
若手研究(B)
Apr. 2011 - Mar. 2012 - 平成22年度 宇都宮大学大学院工学研究科萌芽的研究助成：「有限要素法と最適化手法を併用した最適磁性材料配置アルゴリズムに基づく電気機器のトポロジー設計手法の開発－圧粉磁芯構造回転機の高性能化設計への適用－」
Apr. 2010 - Mar. 2011 - マルチプラットフォームの大規模数値シミュレーションを支援するフレームワークの構築
基盤研究(B)
Apr. 2009 - Mar. 2011 - Hコイル法を用いた単板磁気特性試験法の国際規格化に向けた実用研究
基盤研究(B)
Apr. 2008 - Mar. 2011 - 岡山大学大学院自然科学研究科学生奨励研究費：「高効率電気機器開発のための位相最適化手法に関する研究」
Apr. 2004 - Mar. 2005 - 岡山大学大学院自然科学研究科学生奨励研究費：「高効率電気機器開発のための位相最適化手法に関する研究」
Apr. 2003 - Mar. 2004
- 特願2024-140088, 情報処理装置，磁化推定システム，情報処理方法，及びプログラム
中西 空,松友真哉,岡本吉史,塩山将英,中村勢到 - 特願2024-30313, 磁化推定装置，磁化推定方法，及びプログラム
岡本吉史,鈴木元芽 - 特願2023-201973, 磁化推定装置，磁化推定システム，磁化推定方法，学習モデルの生成方法，及びプログラム
岡本吉史・塩山将英 - 特願2022-163595, 磁化推定装置，磁化推定方法，及びプログラム
岡本吉史・中村勢到・塩山将英 - 特開2022-027118, 特願2020-130924, 磁気浮上移動体
中村壮亮・中村勇太・岡本吉史
■ Academic Contribution Activities
