| 1. | Tangent point retarder
切面相切平面 |
| 2. | Removed cuts are removed outside the object along an axis of revolution
配置在剖切符号或剖切平面迹线的延长线上的移出断面图。 |
| 3. | When the cutting plane is passed through the axes of holes or hollows , those features must be drawn as sections
当剖切平面通过回转面形成的孔或凹坑的轴线时，这些结构按剖视绘制，如图所示。 |
| 4. | When an assumptive cutting plane is passed through an object , the cross section is drawn , which is called a cut
假想用剖切平面将机件的某处切断，仅画出剖切面与机件接触部分的图形称为断面图，简称断面。 |
| 5. | Based on the posture of the assembly part and the translation of coordinates , a solution of building intersection line between the plane and the assembly part is discussed
在分析坐标系转换和零部件位姿基础上，研究了零件截切环求取、截切环拓扑树建立、截切平面三角化等方法。 |
| 6. | This paper analyses the tangent equation of space curve and the derivation process of the curved tangent plane equation in the higher - mathematics teaching - materials , and shows another method to extract the tangent equation of space curve
摘要分析高等数学教材中空间曲线的切线方程和曲面的切平面方程的推导过程，给出求空间曲线的切线方程的另一种方法。 |
| 7. | In the mesh the local geometric and topological property can be clearly described with its adjacent points for a given point . then the delaunay triangulation technique in two dimensions is used to delete and modify the illegal triangles in the resulting mesh
本文采用切平面作为曲面的局部近似，将局部的采样点投影到切平面上，并对投影点集作二维delaunay三角剖分，最后根据投影点上的邻接关系确定三维点之间的连接关系。 |
| 8. | With the algorithm , fairing and uniform meshes are obtained by moving each vertex in normal direction and tangent plane simultaneously . an algorithm of feature enhancing and mesh smoothing is studied . the algorithm is based on iterative use of diffusion of normals and vertices
融入平均曲率光顺思想，对拉普拉斯算子进行改进，通过在法矢方向和切平面上同时对网格顶点进行移动调整，较好地达到模型外形光顺、三角片形状比较均匀的要求。 |
| 9. | The following is main research work : 1 . geometry characters ( such as tangent plane and normal plane etc . ) and differential coefficient characters are theoretically analyzed in detail , then the intersection differential coefficient system model for trace is constructed
在理论上，系统地分析了交线的几何特征（如切平面和法平面等）和微分特征（如曲面的一阶基本齐式等） ，建立了交线的微分系统跟踪模型，从而为今后进一步研究求交问题提供了一个可行的途径。 |
| 10. | The azeotropic distillation of the system acetic acid - water - azeotropic agent ( isopropyl acetate and butyl acetate ) is simulated . due to the non - ideal behavior , nrtl - hoc and uniquac - hoc model is used to depict vapor - liquid phase equilibrium behavior of this system . concerning the liquid in the decanter , the stability is checked by tangent plane stability analysis , and the initialization of phase splitting calculation is produced . a good estimate of the phase fration is gotten by successive substitution with newton ' s method , and every component of two phase is gotten by mass equilibrium equation . finally , the solution of this equation is produced with successive substitution calcultion . the naphtali - sandholm method is used to simulation of azeotropic distillation . by virtue of this combined calculation method , the simulation is begun with operational data as basical data . the results of simulation accord with the operating data , which proved that the combined calculation method is credible
该体系具有高度非理想性，气液相平衡模型采用nrtl - hoc和uniquac - hoc模型，采用切平面判据法对进入分层器中的液相进行液相稳定性测试，提供液液相分离计算的初值，再结合牛顿拉夫森迭代法运算求得相分割系数，根据物料衡算求出各相组成，循环迭代可求得分层各组分数据，共沸精馏模拟计算采用那夫塔列-山德荷姆全变量迭代算法。 |
