Rchr
J-GLOBAL ID：202001004635983754   Update date: Jan. 30, 2025

Asahi Yuuichi

Asahi Yuuichi
Research theme for competitive and other funds  (3)：
  • 2023 - 2026 深層学習による都市汚染物質拡散のアンサンブル即時予報の実現
  • 2022 - 2026 Real-time wind digital twin with 1-meter resolution using GPU supercomputer
  • 2020 - 2022 Analyzing the phase-space dynamics of 5D distribution functions using the dimensionality reduction technique
Papers (14)：
  • Shinya Maeyama, Tomo-Hiko Watanabe, Motoki Nakata, Masanori Nunami, Yuuichi Asahi, Akihiro Ishizawa. Rotating flux-tube model for local gyrokinetic simulations with background flow and magnetic shears. Journal of Computational Physics. 2024. 113595-113595
  • Hasegawa Yuta, Onodera Naoyuki, Asahi Yuichi, Ina Takuya, Imamura Toshiyuki*, Idomura Yasuhiro. Continuous data assimilation of large eddy simulation by lattice Boltzmann method and local ensemble transform Kalman filter (LBM-LETKF). Fluid Dynamics Research. 2023. 55. 6. 065501\_1-065501\_25
  • Asahi Yuichi, Onodera Naoyuki, Hasegawa Yuta, Shimokawabe Takashi*, Shiba Hayato*, Idomura Yasuhiro. CityTransformer; A Transformer-based model for contaminant dispersion prediction in a realistic urban area. Boundary-Layer Meteorology. 2023. 186. 3. 34-692
  • Shinya Maeyama, Tomo-Hiko Watanabe, Motoki Nakata, Masanori Nunami, Yuuichi Asahi, Akihiro Ishizawa. Multi-scale turbulence simulation suggesting improvement of electron heated plasma confinement. Nature Communications. 2022. 13. 1
  • Asahi Yuichi, Padioleau T.*, Latu G.*, Bigot J.*, Grandgirard V.*, Obrejan K.*. Performance portable Vlasov code with C++ parallel algorithm. Proceedings of 2022 International Workshop on Performance, Portability, and Productivity in HPC (P3HPC) (Internet). 2022. 68-80
ｍore...
MISC (14)：
  • Hasegawa Yuta, Onodera Naoyuki, Asahi Yuichi, Idomura Yasuhiro. Data assimilation of two-dimensional isotropic turbulence by lattice Boltzmann method and local ensemble transform Kalman filter (LBM-LETKF). Keisan Kogaku Koenkai Rombunshu (CD-ROM). 2023. 28. 5
  • Asahi Yuichi, Maeyama Shinya*, Fujii Keisuke*. Machine learning models for sub-grid-scale (SGS) term. Keisan Kogaku Koenkai Rombunshu (CD-ROM). 2023. 28. 4
  • Onodera Naoyuki, Idomura Yasuhiro, Hasegawa Yuta, Asahi Yuichi, Inagaki Atsushi*, Shimose Kenichi*, Hirano Kohin*. Parameter optimization for urban wind simulation using ensemble Kalman filter. Keisan Kogaku Koenkai Rombunshu (CD-ROM). 2023. 28. 4
  • Hasegawa Yuta, Onodera Naoyuki, Asahi Yuichi, Idomura Yasuhiro. Data assimilation of three-dimensional turbulent flow using lattice Boltzmann method and local ensemble transform Kalman filter (LBM-LETKF). Dai-36-Kai Suchi Ryutai Rikigaku Shimpojiumu Koen Rombunshu (Internet). 2022. 5
  • Asahi Yuichi, Padioleau T.*, Latu G.*, Bigot J.*, Grandgirard V.*, Obrejan K.*. Performance portability with C++ parallel algorithm. Dai-36-Kai Suchi Ryutai Rikigaku Shimpojiumu Koen Rombunshu (Internet). 2022. 8
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Lectures and oral presentations  (31)：
  • Large-eddy simulation of metropolitan Tokyo using locally mesh-refined lattice Boltzmann method
    (第37回数値流体力学シンポジウム)
  • Choice of state vector in lattice Boltzmann method with local ensemble transform Kalman filter
    (第37回数値流体力学シンポジウム)
  • Performance portability of Ensemble Kalman Filter using C++ senders/receivers
    (2023 Open Accelerated Computing Summit (OACS))
  • Generating observation guided ensembles for data assimilation with denosing diffusion probabilistic model
    (40th International Conference on Machine Learning (ICML 2023))
  • Development of data assimilation methods and observation systems for a wind digital twin in urban areas
    (JHPCN: 学際大規模情報基盤共同利用・共同研究拠点第15回シンポジウム)
ｍore...
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