The QSS (QuasiSteadyState) model of converter which neglects the negative impedance of DC system will bring some errors when unbalanced fault occurs in AC system.
A numerical method is presented for the two dimensional quasisteadystate heat transfer on high power density laser welding processes according to the keyhole model.
对高能量密度激光匙孔焊接过程的二维准稳态传热进行了计算方法的研究。
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The conception of the flight quasisteadystate motion and the design method based on it are proposed in the characteristic of the large amplitude maneuvering of the fighter.