应用龙格库塔法解非线性方程得到了该问题的数值解，给出了圆柱体随着柱体高度的直径变化曲线。

The numerical results of the nonlinear formula were obtained by Runge-Kutta method, and we have also obtained the curve of diameter of the example.

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应用龙格库塔法解非线性方程得到了该问题的数值解，给出了截面高度随梁长的变化曲线。

The numerical results of nonlinear formula were obtained by the Runge-Kutta method, and we have also obtained the curve of the height of the example.

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经反复调用龙格库塔函数可得出约瑟夫森结的I-V曲线。

The IV characteristic of Joseph son junctions was obtained by calling RungeKutta function repeatedly.

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