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    Helicopter rotor wing variable-pitch rod, helicopter automatic inclinator and helicopter

    Free access
    NI MING / LI CHAOYANG / ZHENG YIHUA | European Patent Office | 2020

    NASA Space Weather Center Services: Potential for Space Weather Research

    Zheng, Yihua / Kuznetsova, Masha / Pulkkinen, Antti et al. | NTRS | 2012

    NASA GSFC CCMC Recent Model Validation Activities

    Rastaetter, L. / Pulkkinen, A. / Taktakishvill, A. et al. | NTRS | 2012

    Controlling factors of Region 2 field-aligned current and its relationship to the ring current: Model results

    Zheng, Yihua / Lui, Anthony T.Y. / Fok, Mei-Ching et al. | Elsevier | 2007

    Space Weather Forecasting at NASA GSFC Space Weather Research Center

    Zheng, Yihua / Kuznetsova, Maria M. / Pulkkinen, Antti et al. | NTRS | 2012