论文部分内容阅读
(一) 二次曲面除了錐和柱外,可以分成以下五类: Ⅰ球类:包括球,迴轉椭球和一般椭球三种。Ⅱ抛物面类:包括迴轉抛物面和椭圆抛物面二种。Ⅲ双叶双曲面:包括双叶等角双曲迴轉面,双叶等角双曲面,双叶双曲迴轉面和一般双叶双曲面四种。Ⅳ单叶双曲面:包括单叶等角双曲迴轉面,单叶等角双曲面,单叶双曲迴轉面和一般单叶双曲面四种。Ⅴ双曲抛物面:包括等角双曲抛物面和一般双曲抛物面两种。
(A) The secondary surface in addition to the cone and column, can be divided into the following five categories: Ⅰ ball: including the ball, the revolving ellipsoid and the general ellipsoid three. Ⅱ Parabolic categories: including the rotating paraboloid and elliptical paraboloid two. Ⅲ biconstral hyperboloid: including bilobal equilateral hyperboloid gyration, bifurcated equilateral hyperboloid, double-leaf hyperboloid gyration and general double-leaf hyperboloid four. Ⅳ single-leaf hyperboloid: including the single-leaf equilateral hyperboloid gyration, single-equilateral hyperboloid, single-leaf hyperboloid gyrus and general single-leaf hyperboloid four. Ⅴ Hyperbolic paraboloid: includes two types of hyperbolic paraboloid and general hyperbolic paraboloid.