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。
Research based on CAD system of drawing meridional plane in impeller of centrifugal pump;
基于CAD系统的离心泵叶轮轴面投影绘型
Computer aided design of meridian flow passage in impeller of screw-centrifugal pump;
螺旋离心泵叶轮轴面流道的计算机辅助设计
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。
