By using the method of boundary layer, it discusses the axis symmetry problems of the combines rotary shell when its firstcurvature is in constant.
利用边界层方法,讨论了第一主曲率为常数的组合旋转壳的轴对称问题。
2
When it is curved, the law of its curvature seems to be at the least of the first and at the most of the second order.
当它是曲线的时候,其弯曲的法则看起来至少是一阶至多是二阶。
3
In this paper, we first polygonize the scattered data points, then estimate the normal vector and curvature of each point using the local presentation of data points.