We have studied the KS entropy of a 2-dimensional measure-preserving mapping with an elliptic or hyperbolic fixed point respectively, as well as that of its 3-dimensional extension.

我们已经研究了分别具椭圆和双曲不动点的二维保测度映射及其受摄三维扩张的KS熵。

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Hyperbolic velocity filtering and similar coefficient method are introduced to remove the influences resulting from end-point effect and alias.

为了消除端点和假频影响，文中采用了双曲线速度滤波法和相似系数法。

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If the definition: "the plane's two fixed-point distance of the poor in absolute terms equal to the constant point of the track is hyperbolic."

如定义：“平面内到两个定点的距离的差的绝对值等于常数的点的轨迹是双曲线。”

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