Theoretically speaking, it is a rather-clearly discussed subject to standardize the quadratic equation into the normal forms by spinning the coordinate axis so as to approach the shapes of its curves.

从理论上讲，通过坐标轴旋转将二次方程化简为规范形式，从而讨论其曲线的形状，这已是讨论得相当明了的课题。

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Using the normal solutions of the governing differential equation, the general solution of a bending beam is obtained.

借助控制微分方程的标准基本解答组，获得梁弯曲问题初参数形式的通解。

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Equivalent normal forms of the cavitated bifurcation equation at the bifurcation point were presented by using singularity theory.

利用奇点理论给出了空穴分岔方程在分岔点的等价正规形。

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