反曲线饰纵断面部分为凹线，部分为凸形的檐口的线脚，尤用在古典建筑中。

A molding for a cornice, having a partly concave and partly convex curve in profile, used especially in classical architecture.

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泰森多边形法中的每个细胞镶嵌是一个凸多面体。

Each cell in a Voronoi tessellation is a convex polyhedron.

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在参考基于顶点可见性的凹多边形凸分解算法的基础上，提出了改进的方法。

An improved algorithm is proposed based on the polygon convex decomposition algorithm based on point visibility.

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