In mathematics,an ellipsoidal surface can be approximated by a series of continuous secant facets,each of which passes through four corner points of corresponding grid formed by two geodetic parallels and two meridians and is taken as mapping plane.
以规则的经纬网格为单元,以每4个网格角点所构成的平面来切割并逼近椭球面,椭球面上同纬度的点子均以椭球短轴上的相应点为投影中心投影到各切割平面,采用这种类似楔形的投影方式,将减小长度投影变形的最大值,并使相邻图幅之间保持空间连续。
In this projection mode, the ellipsoidal surface can be approximated mathematically by a series of continuous secant facets which are all isosceles trapezoids.
本文主要采用了两种投影方式将椭球面上的各点按经纬网格投影到相应的切割平面上：楔形投影和按各点的椭球面法线进行投影。
This article shows the plane cutting methods of medical image data by VTK.
本文讨论基于VTK的医学影像数据的平面切割方法:Clipping方法和Cropping方法。
By means of the Max min method based on optimal fuzzy decision making,the problem is transformed into an ordinary single objective programming,and the optimal solution is obtained with the help of cutting plan method in Geometric Programming.
为使工程结构中多目标模糊优化设计问题得到合理而有效的解决，通过构造满足模糊约束条件的各模糊目标子集的隶属函数，用最优模糊判决协调求解的最大最小法，将多目标模糊优化设计化成普通单目标数学规划问题，并用几何规划的切割平面法来求解之。
