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査読付き学協会誌論文 / Refereed journal papers

  1. Yoshikazu Yamanaka, and Katsutoshi Yoshida, ``Modeling of human center of pressure using a viscoelastic-supported inverted pendulum,'' Trans. of Mechanical Engineering Journal, The Japan Society of Mechanical Engineers (JSME), vol.12, no.3, pp.1-9, April 2025. https://doi.org/10.1299/mej.24-00464 (Impact Factor (JCR): 1.0)

  2. Yoshikazu Yamanaka, Satoshi Wakahara, and Katsutoshi Yoshida, ``Simultaneous design of two-stage gearboxes: an application of gravitational particle swarm algorithm,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), vol.68, no.6, pp.158-166, June 2024. https://www.jstage.jst.go.jp/article/iscie/37/6/37_158/_article/-char/en

  3. Yoshikazu Yamanaka, Shoki Hirose, and Katsutoshi Yoshida, ``Achieving multi-solution tracking in gravitational particle search algorithm through single parameter extension,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), vol.68, no.6, pp.167-174, June 2024. https://www.jstage.jst.go.jp/article/iscie/37/6/37_167/_article/-char/en

  4. Yoshida Katsutoshi and Yamanaka Yoshikazu, ``Nonlinear stochastic parameter estimation of a random Duffing-van der Pol oscillator using Fokker-Planck type residual,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), vol.36, no.5, pp.130-135, May 2023. https://www.jstage.jst.go.jp/article/iscie/36/5/36_130/_article

  5. Katsutoshi Yoshida, Mikinori Ito, Hayate Kaido, and Yoshikazu Yamanaka, ``Three Degree-of-freedom Modeling of the Random Fluctuation Arising in Human-bicycle Balance,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), Vol.34, no.11, pp.294-302, February 2022. https://doi.org/10.5687/iscie.34.294

  6. Yoshikazu Yamanaka and Katsutoshi Yoshida, ``Simple gravitational particle swarm algorithm for multimodal optimization problems,'' PLoS ONE 16(3): e0248470, 2021. https://doi.org/10.1371/journal.pone.0248470 (Impact Factor (JCR): 2.74)

  7. Yoshikazu Yamanaka and Katsutoshi Yoshida, ``Monte Carlo analysis of gathering and scattering behavior generated by gravitational particle swarm algorithm,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), vol.33, no.1, pp.16-23, 2020. https://doi.org/10.5687/iscie.33.16

  8. Katsutoshi Yoshida and Yoshikazu Yamanaka, ``Stochastic modeling of nonlinear random vibrations using heavy-tailed mixture distribution,'' Trans. of the Institute of Systems, Control and Information Engineers (ISCIE), vol.33, no.1, pp.9-15, 2020. https://doi.org/10.5687/iscie.33.9

  9. Yoshikazu Yamanaka, Shigeki Matsumoto, and Katsutoshi Yoshida, ``Reproduction of human dynamic stability in cooperation with human controller model,'' Artificial life and robotics, vol.25, no.1, pp.30-37, Sep. 2019. https://doi.org/10.1007/s10015-019-00560-y

  10. Katsutoshi Yoshida and Yoshikazu Yamanaka, ``Improving controller performance for modeling two-person artificial wrestling by underestimating basins of attraction,'' Artificial life and robotics, vol.25, no.1, pp.38-47, Sep. 2019. https://doi.org/10.1007/s10015-019-00557-7

  11. Kasutoshi Yoshida, Yoshikazu Yamanaka, and Hideki Takamatsu, ``Nonlinear estimation of the transmission-input-shaft torque in a full-scale automotive vehicle,'' Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol.13, Issue 2, pp.JAMDSM0037 (12 pages), May 2019. http://doi.org/10.1299/jamdsm.2019jamdsm0037 (Impact Factor (JCR):0.503)

  12. Katsutoshi Yoshida, Keishi Sato, and Yoshikazu Yamanaka, ``Simple Degree-of-Freedom Modeling of the Random Fluctuation Arising in Human Bicycle Balance,'' Applied Sciences, Vol.9, Issue 10, p.2154 (12 pages), May 2019. http://doi.org/10.3390/app9102154 (Impact Factor (JCR):1.689)

  13. Yoshikazu Yamanaka and Tadashi Tsubone, ``Tracking optima in dynamical problems by an optimizer based on piecewise-rotational chaos system,'' IEICE Trans. Nonlinear Theory and Its Applications (NOLTA), vol.9, no.4, pp.497-516, Oct. 2018. http://doi.org/10.1587/nolta.9.497

  14. Yoshikazu Yamanaka and Tadashi Tsubone, ``Analysis of an optimizer based on piecewise-rotational chaotic system,'' IEICE Trans. Nonlinear Theory and Its Applications (NOLTA), vol.7, no.4, pp.557-575, Oct. 2016. http://doi.org/10.1587/nolta.7.557

  15. Yoshikazu Yamanaka and Tadashi Tsubone, ``An optimizer using swarm of chaotic dynamical particles,'' IEICE Trans. Nonlinear Theory and Its Applications (NOLTA), vol.6, no.1, pp.112-130, Jan. 2015. http://dx.doi.org/10.1587/nolta.6.112

査読付き国際会議論文 / Refereed conference papers

  1. Yoshikazu Yamanaka, ``Adaptive Parameter Control in GPSA Based on Linear Mapping of Particle Fitness: Comparison of Position and Personal Best Strategies'' The 2025 International Symposium on Nonlinear Theory and its Applications (NOLTA'25), (In printing)

  2. Yoshikazu Yamanaka, Takashi Abe, and Katsutoshi Yoshida, ``Modeling of Human Center of Pressure Using a Viscoelastic-Supported Inverted Pendulum,'' Proceedings of The 17th International Conference on Motion and Vibration (MoViC) & The 20 th Asia-Pacific Vibration Conference (APVC), Paper No.7415, Tokyo, Japan, August 2024 (5 pages).

  3. Katsutoshi Yoshida, and Yoshikazu Yamanaka, ``Impulse response of internal mass enclosed by protective structure (presence of penetrant strike),'' Proceedings of The 17th International Conference on Motion and Vibration (MoViC) & The 20 th Asia-Pacific Vibration Conference (APVC), Paper No.7413, Tokyo, Japan, August 2024 (5 pages).

  4. Yoshikazu Yamanaka, Yuya Nakamura, Hibiki Nakayama, and Katsutoshi Yoshida, ``Improving state feedback control model with dead band for reproducing human balancing motions,'' Proceedings of the 55th ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS'23), pp. 87-92, Adachi, Japan, April 2024.

  5. Yoshikazu YAMANAKA, Hiroki TAKAHARA, and Katsutoshi YOSHIDA, ``Enhancing the gravitational search algorithm through adaptive parameter control using linear mapping of fitness: A Preliminary Investigation'', Proceedings of International Conference on Design and Concurrent Engineering 2023 & Manufacturing Systems Conference 2023, Regular Paper No.39 (7 pages), Tokyo, Japan, Sept. 2023.

  6. Satoshi Wakahara, Katsutoshi Yoshida and Yoshikazu Yamanaka, ``Simultaneous design of two-stage gearboxes: an application of multimodal optimization,'' Proceedings of the 54th ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS'22), pp.87-92, Nara, Japan, March 2023.

  7. Shoki Hirose, Katsutoshi Yoshida and Yoshikazu Yamanaka, ``Multi-solution tracking in shifting sphere function using gravitational particle swarm algorithm,'' Proceedings of the 54th ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS'22), pp.81-86, Nara, Japan, March 2023.

  8. Katsutoshi Yoshida, Yoshikazu Yamanaka, ``Parameter estimation of a random Duffing-van der Pol system via Fokker-Planck type residual,'' Proceedings of the 53rd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS'21), pp.24-28, 2022.

  9. Katsutoshi Yoshida, Yoshikazu Yamanaka, ``Three degree-of-freedom stochastic modeling of human-bicycle balance fluctuations,'' Proceedings of the 52nd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS'20), pp.73-78, 2021.

  10. Katsutoshi Yoshida, Yoshikazu Yamanaka, ``Parameter Estimation via Fokker-Planck Type Residual: Application to Linear Stationary Random Vibration,'' The 15th International Conference on Motion and Vibration Control (MoViC2020), December 2020, Japan, Paper ID:10055 (6 pages).

  11. Yoshikazu Yamanaka, Takeshi Igarashi, and Katsutoshi Yoshida, ``A parameter study of gravitational particle search algorithm for path planning,'' The 2020 International Symposium on Nonlinear Theory and its Applications (NOLTA2020), pp.401-404, Online Conference, Nov. 2020.

  12. Mikinori Ito, Hayate Kaido, Yoshikazu Yamanaka, and Katsutoshi Yoshida, ``Three degree-of-freedom stochastic modeling of human-bicycle balance fluctuations,'' Proceedings of the 52nd ISCIE International Symposium on Stochastic Systems Theory and Its Applications (SSS), pp.73-78, Osaka, Japan, Oct. 2020.

  13. Yoshikazu Yamanaka and Katsutoshi Yoshida, ``Monte Carlo analysis of gathering and scattering behavior generated by gravitational particle swarm algorithm,'' In Proc. the 50th ISCIE International Symposium on Stochastic Systems Theory and Its Application (SSS), pp.167-171, Kyoto, Japan, Nov. 2018.

  14. Katsutoshi Yoshida and Yoshikazu Yamanaka, ``Stochastic modeling of nonlinear random vibrations using heavy-tailed mixture distribution,'' In Proc. the 50th ISCIE International Symposium on Stochastic Systems Theory and Its Application (SSS), pp.13-18, Kyoto, Japan, Nov. 2018.

  15. Haru Hikita, Yoshikazu Yamanaka, and Tadashi Tsubone, ``Circuit Implementation and Bifurcation Analysis of a Piecewise-Rotational Chaotic System for Solving Optimization Problems,'' The 2017 International Symposium on Nonlinear Theory and its Applications (NOLTA’17), pp.502-505, Cancun, Mexico, Dec. 2017.

  16. Yoshikazu Yamanaka and Tadashi Tsubone, ``Tracking optima in dynamical problems by a chaotic population based optimizer,'' The 2016 International Symposium on Nonlinear Theory and its Applications (NOLTA'16), pp.550-553, Yugawara, Japan, Nov. 2016.

  17. Yoshikazu Yamanaka and Tadashi Tsubone, ``Synthesis and analysis of piecewise rotational chaos for an optimizer,'' The 2015 International Symposium on Nonlinear Theory and its Applications (NOLTA'15), pp.732–735, Hong Kong, China, Dec. 2015.

  18. Yoshikazu Yamanaka and Tadashi Tsubone, ``A basic consideration of an optimizer based on piecewise rotational chaos system,'' 2015 IEEE Congress on Evolutionary Computation (CEC2015), pp.2664-2671, Sendai, Japan, May 2015.

  19. Yoshikazu Yamanaka and Tadashi Tsubone, ``A Basic Study on Symmetrical Chaotic Dynamics for Population-based Optimization,'' The 2014 International Symposium on Nonlinear Theory and its Applications (NOLTA'14), pp.152-155, Luzern, Switzerland, Sept. 2014.

  20. Yoshikazu Yamanaka and Tadashi Tsubone, ``An idea of Novel Optimizer using Swarm of Chaotic Dynamical Particles,'' The 2013 International Symposium on Nonlinear Theory and its Applications (NOLTA'13), pp.240-243, Santa Fe, USA, Sept. 2013.

  21. Yoshikazu Yamanaka and Tadashi Tsubone, ``A Basic Concept of Particle Swarm Optimization based on Chaos Spike Oscillator,'' The 2012 IEEE Workshop on Nonlinear Circuit Networks (NCN'12), pp.20-23, Tokushima, Japan, Dec. 2012.

  22. Yoshikazu Yamanaka and Tadashi Tsubone, ``A Basic Study on Particle Swarm Optimization Based on Chaotic Spike Oscillator Dynamics,'' The 19th International Conference on Neural Information Processing (ICONIP2012), pp.199-207, Doha, Qatar, Nov. 2012.

査読なし国際会議論文 / Non-refereed conference papers

  1. Yoshikazu Yamanaka, ``Investigating Initial Velocity Settings to Improve Early Stage Search Efficiency in GPSA,'' The 2024 International Symposium on Nonlinear Theory and its Applications (NOLTA'24), p.269, Ha Long Bay, Vietnam, Dec. 2024.

  2. Yoshikazu Yamanaka, Shoki Hirose, and Katsutoshi Yoshida, ``A tracking performance comparison of different particle swarms using tolerance update,'' The 2022 International Symposium on Nonlinear Theory and its Applications (NOLTA'22), p.535, Online, Dec. 2022.

  3. Yoshikazu Yamanaka, Shoki Hirose, Han Xinyu, and Katsutoshi Yoshida, ``A fundamental investigation of GPSA for tracking multiple optima in dynamic environment,'' RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2022 (NCSP'22), pp.161-164, Online Conference, Mar. 2022.

  4. Yoshikazu Yamanaka, ``Approximating the search distribution of particle swarm optimization using mixture distribution,'' The 2021 NonLiner Science Workshop, p.NLSW-33, Online, Dec., 2021.

  5. Yoshikazu Yamanaka, Basic investigation of steady and transient searching behavior in particle swarm optimization, RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2021 (NCSP'21), pp.170-173, Online Conference, Mar. 2021.

  6. Yoshikazu Yamanaka, Shigeki Matsumoto, and Kasutoshi Yoshida, ``Analysis on human controller model in cooperation with human operator,'' In Proc. the Twenty-Fourth International Symposium on Artificial Life and Robotics (AROB) 2019, pp.168-171, Beppu, JAPAN, Jan. 2019.

  7. Keishi Sato, Yoshikazu Yamanaka, and Katsutoshi Yoshida, ``Identification of single degree-of-freedom fluctuation model of human bicycle balance,'' In Proc. the Twenty-Fourth International Symposium on Artificial Life and Robotics (AROB) 2019, pp.326-330, Beppu, JAPAN, Jan. 2019.

  8. Kasutoshi Yoshida and Yoshikazu Yamanaka, ``Improving controller performance for modeling two individuals artificial wrestling by underestimating basins of attraction,'' In Proc. the Twenty-Fourth International Symposium on Artificial Life and Robotics (AROB) 2019, pp.583-588, Beppu, JAPAN, Jan. 2019.

  9. Yoshikazu Yamanaka and Tadashi Tsubone, ``Robustly efficient parameters for optimizer based on a piecewise rotational chaotic system,'' 2015 Taiwan and Japan Conference on Circuits and Systems (TJCAS 2015), p.17, Tokushima, Japan, Aug. 2015.

査読付き国内発表

  1. 山仲 芳和, 坪根 正, ``カオス力学系に基づく多点探索型手法による最適解追跡,'' 2016年 電子情報通信学会 NOLTA ソサイエティ大会講演論文集, p.21, June 2016.

査読なし国内発表

  1. 山仲 芳和, ``GPSAが形成するsub-swarmの多様性向上を目指したSinusoidal変動係数の一検討,'' 電子情報通信学会技術研究報告 (信学技報), vol.123, no.287 pp.75-78, Nov. 2023.

  2. 大箭 海揮,大坪 拓斗, 山仲 芳和, 吉田 勝俊, ``ヒト走行挙動を模擬するバウンシング型モデルの構築に向けて (パラメータ同定精度の向上),'' Dynamics and Design Conference 2023（D&D2023）, 講演番号424 (11 pages), August 2023.

  3. 山仲 芳和, 吉田 勝俊, ``分割した粒子群を用いたGPSAによる最適解探索挙動の一考察,'' 電子情報通信学会技術研究報告 (信学技報), vol.123, no.21 pp.20-22, May 2023.

  4. 中山 響, 中村 友哉, 山仲 芳和, 吉田 勝俊, ``状態フィードバックモデルに基づくバランス運動のパラメータ表示 ---1自由度非線形モデルの提案---,'' 電子情報通信学会技術研究報告 (信学技報), vol.122, no.373, pp.129-134, January 2023.

  5. 中村 友哉, 山仲 芳和, 吉田 勝俊, ``状態フィードバックモデルに基づくバランス運動のパラメータ表示について ---1自由度モデルの提案---,'' 電子情報通信学会技術研究報告 (信学技報), vol.121, no.335, pp.193-198, January 2022.

  6. 大坪 拓斗, 山仲 芳和, 吉田 勝俊, ``ヒト走行挙動を模擬するバウンシング型モデルの構築に向けて ---パラメータ同定法の提案---,'' 電子情報通信学会技術研究報告 (信学技報), vol.121, no. 335, pp.199-204, January 2022.

  7. 若原 聡, 山仲 芳和, 吉田 勝俊, ``GPSAを用いた歯車列設計問題の複数解探索,'' 電子情報通信学会技術研究報告 (信学技報), vol.121, no.197, pp.84-89, Oct. 2021.

  8. 朝日 明彦, 山仲 芳和, 吉田 勝俊, ``GPSAを用いた複数トラス構造の同時設計手法の開発,'' 電子情報通信学会技術研究報告 (信学技報), vol.121, no.197, pp.78-83, Oct. 2021.

  9. 石村 桂太, 山仲 芳和, 吉田 勝俊, ``写像法による双円弧バウンシングモデルの安定性解析,'' 電子情報通信学会技術研究報告 (信学技報), vol.118, no.75, pp.131-136, June 2018.

  10. 大森 龍馬, 山仲 芳和, 吉田 勝俊, ``ヒト平衡運動の確率密度関数を再現する混合分布について,'' 電子情報通信学会技術研究報告 (信学技報), vol.118, no.75, pp.125-129, June 2018.

  11. 大沼 研太, 山仲 芳和, 高松 秀樹, 吉田 勝俊, ``ヒステリシス特性を有するアクセルペダルのモデル化に向けた検討,'' 電子情報通信学会技術研究報告 (信学技報), vol.118, no.75, pp.97-101, June 2018.

  12. 山仲 芳和, 坪根 正, ``カオス力学系に基づく多点探索型最適化手法により簡素に実現される解追跡メカニズムの解析,'' 進化計算学会進化計算シンポジウム2016, pp.5-11, Dec. 2016.

  13. 山仲 芳和, 坪根 正, ``適応度の再計算による評価関数の変動検出を必要としない複数カオス探索点による時変最適化問題の解追跡,'' 電子情報通信学会技術研究報告 (信学技報), vol.116, no.215, pp.69-74, Sept. 2016.

  14. 疋田 葉留, 山仲 芳和, 坪根 正, ``離散時間区分回転系の呈するカオスの分岐と回路実装,'' 電子情報通信学会技術研究報告 (信学技報), vol.116, no.215, pp.75-78, Sept. 2016.

  15. 田中 健一郎, 丹治 裕一, 山仲 芳和, 坪根 正, ``対称なカオスダイナミクスを用いた群知能最適化法のGPUへの実装,'' 電子情報通信学会技術研究報告 (信学技報), vol.115, no.425, pp.63-67, Jan. 2016.

  16. 山仲 芳和, 坪根 正, ``カオス力学系に基づく多点探索型最適化手法の動的最適化性能,'' 進化計算学会進化計算シンポジウム2015, pp.298-303, Dec. 2015.

  17. 山仲 芳和, 坪根 正, ``多点探索型最適化法の性能とカオス力学系の時間的挙動,'' 平成27年度 電子情報通信学会信越支部大会, p.19, Oct. 2015.

  18. D.X. Tue, 山仲 芳和, 坪根 正, 振動子の結合系を利用した群れの行動の実現のための基礎検討, 平成27年度 電子情報通信学会信越支部大会, p.137, Oct. 2015.

  19. 山仲 芳和, 坪根 正, ``区分回転カオス系に基づく多点探索型最適化法のパラメータ選定に関する一考察,'' 電子情報通信学会技術研究報告 (信学技報), vol.115, no.77, pp.19-24, June 2015.

  20. 山仲 芳和, 坪根 正, ``カオス力学系に基づく多点探索型最適化手法の基本動作について,'' 進化計算学会進化計算シンポジウム 2014, pp.164-168, Dec. 2014.

  21. 山仲 芳和, 坪根 正, ``簡素な力学系に基づく群知能最適化手法の性能および時系列解析に関する一考察,'' 電子情報通信学会技術研究報告 (信学技報), vol.114, no.348, pp.29-34, Nov. 2014.

  22. 山仲 芳和, 坪根 正, ``簡素な力学系による群知能最適化手法の基本性能と力学的特徴に関する一考察,'' 電子情報通信学会技術研究報告 (信学技報), vol.114, no.250, pp.91-94, Oct. 2014.

  23. 山仲 芳和, 坪根 正, ``ニューラルオシレータを基礎とした簡素な力学系による群知能最適化手法の基本性能について,'' 平成24年度 電子情報通信学会信越支部大会, p.30, Oct. 2014.

  24. 山仲 芳和, 坪根 正, ``カオスダイナミクスに従う粒子群による最適化,'' 進化計算学会進化計算シンポジウム2013, pp.72-77, Dec. 2013.

  25. 山仲 芳和, 坪根 正, ``カオスダイナミクスに従う粒子群による最適化手法について,'' 電子情報通信学会技術研究報告 (信学技報), vol.113, no.271, pp.79-84, Oct. 2013.

  26. 山仲 芳和, 坪根 正, ``カオスダイナミクスを用いた粒子群による最適化手法の基礎検討,'' 平成25年度 電子情報通信学会信越支部大会, p.5, Oct. 2013.

  27. 栗田 裕弥, 山仲 芳和, 坪根 正, ``区分定数発振器に基づいた離散粒子群最適化手法に関する一考察,'' 平成25年度 電子情報通信学会信越支部大会, p.6, Oct. 2013

  28. 栗田 裕弥, 山仲 芳和, 坪根 正, ``区分定数発振器に基づいた離散粒子群最適化手法,'' 電子情報通信学会技術研究報告 (信学技報), vol.113, no.116, pp.11-14, July 2013.

  29. 山仲 芳和, 坪根 正, ``カオススパイキング発振器のダイナミクスに基づく粒子群最適化手法の提案,'' 平成24年度 電子情報通信学会信越支部大会, p.25, Oct. 2012.

  30. 山仲 芳和, 坪根 正, ``カオススパイキング発振器のダイナミクスに基づく粒子群最適化手法の基礎検討,'' 電子情報通信学会技術研究報告 (信学技報), vol.112, no.117, pp.59-64, June 2012.

研究助成 / Research Grant

  1. 2018-2020年度 (基盤研究 (B), 分担), 自転車走行のふらつきを予測する数理モデルの構築とパラメータ同定

  2. 2017-2018年度 (研究活動スタート支援, 代表), 部分同期に基づいて探索群を創発するカオス力学結合系による動的最適化問題の解法

  3. 2014年度 ( 長岡技術科学大学協力会 平成26年産業連携事業への助成, 代表), リアルタイム処理を目指した群知能最適化の回路実装に関する研究

大学のホームページ： 宇都宮大学 | 機械システム工学コース(学部) | 機械知能工学プログラム(修士) | 先端工学システムデザインプログラム(博士)

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