The set of equations for inverse force analysis of the spring system is derived at first and then solved using continuation method.
建立了力逆解方程组，用连续法求出了全部解，得到了系统处于静力平衡时的全部构。
Using a compressibility coordinate transformation, a set of the first derivative differential equations has been derived.
采用了压缩性的坐标变换后，推导得到了五个一阶导数的微分方程组。
From the theory of conical shells, a set of the first-order differential equations for the shells of revolution are derived. The discrete-variable method is used to solve the differential equations.
从锥壳理论出发，导出计算旋转壳自由振动的一阶微分方程组，采用离散变量法进行求解。
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