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1·It is indicated that this sort of occupation time never has the generalized arc-sine law.

并指出这种形式的占有时不可能服从广义反正弦律。

2·A new conclusion is put forward, in which the smooth degree of the data row can be enhanced by means of the arc-hyperbolic sine function transformation.

提出了“利用反双曲正弦函数变换提高数据列光滑程度”的新结论，获得了递增时间序列改善的自回归预测新方法。

3·The hydrodynamic lubrication performance of rectangle, inclined plane, circular-arc, triangle, multi-arc and sine surface texture was researched with CFD method based on N-S equation.

采用基于N - S方程的CFD方法，研究矩形、斜面台阶形、圆弧形、三角形、多圆弧形以及正弦形织构表面的动压润滑性能。

4·YCB arc gear pumps are mainly gear, KCG axis, the pump body, cover, the axial bearing, sealing etc. Using double circular-arc gear tooth sine curve.

主要有齿轮、轴、泵体、泵盖、轴承套、轴端密封等组成。齿轮采用双圆弧正弦曲线齿形制造。