to solve first-order differential equations
解一阶微分方程
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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