平面环相关论文
聚醚酯弹性体(例如PBT-PTMG)是一类用途广泛的热塑性弹性体材料,由发生微相分离的聚酯硬段(PBT)和聚醚软段(PTMG)组成。聚酯硬......
We study planar restricted 3-body problems. Suppose point masses m1 and m2 move around their center of mass in circular ......
提出一种基于任意形状平面图形的内、外轮廓数据处理的新方法 ,并针对AutoCAD实体模型的等高截交面轮廓的封闭有向环及内、外环进......