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1·Finally, extension algorithms for NURBS curves are discussed by means of homogeneous coordinates.

最后，利用齐次坐标讨论了NURBS曲线的延伸算法。

2·This paper describes the matrix structure and geometric properties of planar linear transformations, based on homogeneous coordinates.

介绍了线性变换作用向量的化零多项式与最小多项式的概念，并讨论了它们的性质。

3·It is shown that the 2_dimensional projective coordinate system can be constructed by homogeneous vector on the basis of the Descartes homogeneous coordinates.

在笛氏齐次坐标的基础上，采用齐次向量的方法，建立二维射影坐标系。

4·Based on homogeneous barycentric coordinates, a new geometric variable, sharpness factor, is defined for measuring sharpness of independent vertexes.

基于齐次重心坐标，定义了新的网格顶点几何变量——锐度因子。

5·The paper presents electric field of dielectric sphere and ellipsoid in homogeneous electric field, with spherical and ellipsoidal coordinates.

本文用球坐标和椭球坐标计算了处于均匀外场中的介质球和介质椭球的场，其内部的场都是与外场方向相同的均匀场。