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单词 paraboloid
释义

paraboloid /pə'ræb(ə)lɒɪd//pə'ræbə,lɔɪd/

英汉-汉英词典
n. 抛物面
形容词: paraboloidal
词组 | 习惯用语
您要查找的是不是:
  • parabolic adj. 比喻的,寓言似的
  • hyperboloid n. 双曲线体
paraboloid n. 抛物面
hyperbolic paraboloid [数] 双曲抛物面,[数] 双曲抛物体
elliptic paraboloid [数] 椭圆抛物面
paraboloid condenser 抛物面聚光器
paraboloid antenna 抛物面天线
elliptical paraboloid shell 椭圆抛物面型壳
hyperbolic paraboloid shell [力] 双曲抛物面薄壳
cut paraboloid reflector 截抛物面反射器
paraboloid of revolution 回转抛物面
dark field paraboloid condenser 抛物面暗场聚光镜

网络短语:
receiving paraboloid 抛物面接收天线
paraboloid radiator 抛物线体辐射线
truncated paraboloid 截顶抛物面
paraboloid cone 抛物面锥
confocal paraboloids 共焦抛物面
paraboloid eyepiece 抛物面目镜
revolution paraboloid 回转抛物面
hyperbic paraboloid 与抛物曲线形
原声例句
冷知识百科大全

This baby’s got an 100 meter diameter collecting area, an equatorial mount, an off-axis paraboloid reflector—basically, it’s a really good radio telescope.

这个宝贝有一个 100 米直径的收集区、一个赤道仪、一个离轴物面反射器——基本上,它是一个非常好的射电望远镜。

中文百科

抛物面

双曲抛物面
旋转抛物面
ParaboloidesHiperbólico (silla de montar)Elíptico de revolución

抛物面是二次曲面的一种。抛物面有两种:椭圆抛物面双曲抛物面。椭圆抛物面在笛卡儿坐标系中的方程为:


z = \frac{x^2}{a^2} + \frac{y^2}{b^2}.

双曲抛物面在笛卡儿坐标系中的方程为:


z = \frac{x^2}{a^2} - \frac{y^2}{b^2}.

a = b时,曲面称为旋转抛物面,它可以由抛物线绕着它的轴旋转而成。它是抛物面反射器的形状,把光源放在焦点上,经镜面反射后,会形成一束平行的光线。反过来也成立,一束平行的光线照向镜面后,会聚集在焦点上。

英语百科

Paraboloid 抛物面

Paraboloid of revolution
Hyperbolic paraboloid
Parallel rays coming into a circular paraboloidal mirror are reflected to the focal point, F, or vice versa.
The hyperbolic paraboloid is a doubly ruled surface, and thus can be used to construct a saddle roof from straight beams.

In mathematics, a paraboloid is a quadric surface of special kind. There are two kinds of paraboloids: elliptic and hyperbolic.

The elliptic paraboloid is shaped like an oval cup and can have a maximum or minimum point. In a suitable coordinate system with three axes x, y, and z, it can be represented by the equation

近义、反义、联想词
近义词
n.
plane figure, two-dimensional figure

联想词
spherical球的;convex凸面的;cylindrical圆柱形的;concave凹的,凹面的;conical圆锥形的;reflector反射镜;hyperbolic双曲线的;prism棱柱;dome圆屋顶;waveguide波导管;diffraction衍射,绕射;
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