起始层 meaning in English

starting course

After research surface reconstruction with triangular facets , contours of first layer and the last layer are triangulated with layer separation algorithm firstly . and then the least polar - angle criterion is presented for linking two convex contours , and the method is also given in which non - convex contour is transformed to a set of convex contour . with the splitting and integrating algorithm , the single - to - multi - contour reconstruction with triangular facet has been simplified to one - to - one contour
首先采用层析式算法对起始层和结束层中的轮廓进行三角剖分；然后采用最小极角法实现两凸轮廓间的三角片重构，并讨论了非凸轮廓变换为凸轮廓的方法；最后，使用分裂与合并技术将单轮廓匹配多轮廓的三角片重构简化为单轮廓之间的三角片重构，最终完成整个骨骼表面的三角片重构。