切曲面

The resulting surface has a degree 4 parametric polynomial representation and is represented as a network of tangent plane continuous triangular Bézier patches.

生成的曲面有一个4次参数多项式表示并且被表示成一个切平面连续的三角形Bézier片网。

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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.

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。

The tangent plane distance method is the most popular method for phase analysis, which needs to find the global minimum value of TPD function.

相稳定性判别为相平衡计算的基本课题，常采用Gibbs自由能曲面与切平面的距离函数最小化方法求解。

The method put forward to calculate the tangent plane not only promotes the efficiency but also improves the reconstruction effect, especially in the boundary areas and/or sharp arrises.

采用新的方法计算切平面，不但进一步提高了效率，而且改善了曲面边界及尖锐棱边区域的重建效果。

We deduce the eigenvalues of 2-neighbors subdivision matrix of the scheme, and prove that the subdivision surface is convergent, and has property of tangent plane continuity.

通过对细分矩阵特征值的理论分析，证明了文中方法的细分极限曲面收敛且切平面连续。

Based on the geometric expression of the NURBS curve, a simple and effective method of curve and surface extension is put forward, and the blade surface is then successfully extended with the tangent vector by repeatedly applying the above method.

根据叶片的形状特征，以曲线的几何形式为基础，提出了一种简单实用的曲线曲面延伸方法，实现了切矢量连续的叶片型面的延伸。

As for the parametric space calculation to find an optimal 3D point, the Tangent Vector Inversion is presented so as to cut down iteration.

针对求解曲面上最优点的参数域反算问题，引入了切矢逆求方法，可使迭代次数大为降低。

Making use of the inverse surface equation of wave normals and the boundary condition about the continuity of electromagnetic field tangential component at the surface of crystal, expressions about wave normal and ray direction, wave normal and ray refractive indexes were obtained.

论文建立了以光线入射方向和晶体光轴方向为基准的入射坐标系，利用波法线反曲面方程和电磁场在晶体折射界面处切向分量连续性的边界条件，得到了晶体中波法线方向、射线方向、波法线折射率和射线折射率的表达式。

Based on the structural analysis of the steel coal scuttle of the thermal power plant, a method of applying shear force on the complicated curved surface of the shell structure is put forward.

结合火电厂钢煤斗结构分析的实际，提出了板壳结构有限元分析中复杂曲面切向荷载的施加方法，即将面荷载转化为等效节点荷载。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。