圆环坐标

A mechanical calculation method, which was used to analyze the deformation of axial symmetry in plastic process , is put forward in this paper.

针对塑性加工过程中的轴对称变形问题，提出了一种力学计算方法，论证了圆环坐标系的坐标变换法则和主要力学方程，然后将理论计算值与实验条件下的实测值进行对比。

It is shown that the distribution of mechanics variables solved by using the Toroidal Coordinate is more accurate than that by Bridgman analysis.

通过比较发现，采用圆环坐标求解的力学量的分布，较Bridgman解更为准确，可以体现出最小横截面上位移和应变的非线性。

A new method for solving the coordinates of circular points in an image of an equilateral triangle and its inscribed circle was proposed.

提出了一种求解等边三角形及其内切圆的图像圆环点坐标新方法。

Adopting the conformal mapping or rotation axis etc complex methods which areoften used to treat with the hole or cavity problem,a two-dimensional cavity ofeither simply or multiply connected region is projected into the interior of acircle or an annulus.As well as the global coordinate system is turned into thelocal coordinate system.

采用处理孔口问题最常用的映射函数和移轴等复变函数方法，把复杂的单连通区域和某些复连通区域型二维孔洞转化为简单的单位圆内区域或圆环区域，把整体坐标转为局域曲线坐标，而，最终把问题简化归结为一组无穷代数方程组的求解问题。

The paper discusses the position relationship between the litter circles of torus and the section circle of sphere figured out the intersection of torus and sphere when the central axis of torus and sphere center in XOZ coordinate plane through coordinate transformation.

利用坐标变换使圆环中心轴与球心同在XOZ平面内，讨论了在该平面内圆环截圆与球圆的位置不相交、相切和相交时圆环面和球面的相交情况，并给出了判别圆环面、球面相交情况的流程图以及圆环面和球面相交实例。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。