应用能量积分法建造了一个李亚普诺夫函数。
Lyapunov function is established by using energy integral method.
提出直线逼近齿廓曲线近似求解该齿轮刚度的能量积分法。
The energy integration method is also put forth to solve stiffness approximately by linear approximating the tooth profile curve.
从建立观测方程的角度来说，主要研究了三种恢复地球重力场的方法：(1)数值微分法，(2)能量守恒法，(3)数值积分法。
Three methods for gravity field recovery are mainly studied from the views of observation equation, (1) numerical differential method, (2) energy balance approach, (3) numerical integration method.
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