This paper tries to generalize the throwing objects from the one dimension pin to the convex curve in two dimension, and even the three dimensional regular tetrahedron and regular hexahedron .

在蒲丰投针问题的基础上，把投掷物由一维的针推广到二维的凸曲线，三维的正四面体、正六面体；

youdao

Then, two methods are discussed which are point-circle transformation and circular curve fitting for inspecting the bearing's circularity, dimension and concentricity.

然后，着重讨论了用于轴承边界的圆度、尺寸和圆心度检测的两种计算方法—点—圆变换法和圆形曲线拟合法。

youdao

Using the result of author, this paper presents two dimension mixed iteration encryption-recognit ion of image and applications of elliptic curve.

利用已有的结果，给出图像的二维混合迭代加密识别和椭圆曲线的应用。

youdao