采用坐标变换的方法，研究几种加速运动动态黑洞的事件视界，得到了黑洞的视界面方程。

Using coordinate transformation, we study the event horizon of accelerating non-stationary black holes, the equation of event horizon surface is calculated out.

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最后讨论了界面在外力及阻尼情况下的运动，得出界面的一般运动方程。

At last the motion of interface was researched in the presence of an external force and damping. The common motion equation of interface was achieved.

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分别求出了磁液动密封中磁液和被密封液体的速度分布，特别是磁液作为非牛顿流体运动方程的解，并计算了两相液体界面的速度差。

The motion equations of sealed liquid and magnetic liquid which is considered to be non-Newton fluid in magnetic liquid seal were solved respectively and their speed distributions were got.

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