By using this method, automatic drawing is realized in designing different form turning tools which minimizes the hyperbolic error, increases the design speed and improves drawing quality.

此方法大大减小了工件加工时的双曲线误差，实现了各种成形车刀的自动绘图，提高了设计速度和绘图质量。

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A class of nonconforming finite elements are applied to hyperbolic equation with semidiscretization on anisotropic meshes, the optimal error estimates are derived.

在各向异性条件下，讨论了双曲型方程的一类非协调有限元逼近，给出了半离散格式下的最优误差佑计。

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