Effect of different convergence angles of abutment axial surface on the fracture resistance of GI-Ⅱ all-ceramic crowns;
基牙不同轴面聚合度对GI-Ⅱ全瓷冠抗碎裂载荷影响的研究
The structural model should be built in 4 steps with the axial surface analysis as the basis, the fault-fold geometric analysis as the key, the balanced idea as the guidance and the stru.
主要遵循4个基本步骤,轴面分析是基础,断层褶皱形态分析是核心,平衡观念是灵魂,构造复原是手段。
In view of the existed design flaws of meridian flow passage of impeller in centrifugal pumps,it constructed the back shroud streamline of impeller with cube B-spline curves.
针对现有的轴面流道设计方法的缺陷,用三次B样条曲线构造叶轮后盖板型线,在给定流道过流断面面积变化规律的条件下,导出了叶轮前盖板型线计算公式,并通过移动B样条曲线控制点对叶轮轴面流道形状进行修改。