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torus    
n. 花托,花床,圆环面

花托,花床,圆环面

torus
n 1: a ring-shaped surface generated by rotating a circle around
an axis that does not intersect the circle [synonym: {torus},
{toroid}]
2: commonly the lowest molding at the base of a column [synonym:
{torus}, {tore}]

Torus \To"rus\ (t[=o]"r[u^]s), n.; pl. {Tori} (t[=o]"r[imac]).
[L., a round, swelling, or bulging place, an elevation. Cf.
3d {Tore}.]
[1913 Webster]
1. (Arch.) A large molding used in the bases of columns. Its
profile is semicircular. See Illust. of {Molding.}
--Brande & C.
[1913 Webster]

2. (Zool.) One of the ventral parapodia of tubicolous
annelids. It usually has the form of an oblong thickening
or elevation of the integument with rows of uncini or
hooks along the center. See Illust. under {Tubicolae}.
[1913 Webster]

3. (Bot.) The receptacle, or part of the flower on which the
carpels stand.
[1913 Webster]

4. (Geom.)
(a) The surface described by the circumference of a circle
revolving about a straight line in its own plane.
(b) The solid inclosed by such a surface; -- sometimes
called an {anchor ring}.

Syn: Syn. --3d Tore[2].
[1913 Webster]


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  • Torus - Wikipedia
    A ring torus with aspect ratio 3, the ratio between the diameters of the larger (magenta) circle and the smaller (red) circle In geometry, a torus (pl : tori or toruses) is a surface of revolution generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanar with the circle The main types of
  • 环面 - 维基百科，自由的百科全书
    在几何上，一个环面（torus）是一个手镯形状的旋转曲面，由一个圆绕一个和该圆共面的一个轴回转所生成。 球面 可以视为环面的特殊情况，也就是旋转轴是该圆的 直径 时。
  • Torus -- from Wolfram MathWorld
    The torus surface is implemented in the Wolfram Language as Torus[x, y, z, c-a, c+a], and the solid torus as FilledTorus[x, y, z, c-a, c+a] The three standard tori are illustrated below, where the first image shows the full torus, the second a cut-away of the bottom half, and the third a cross section of a plane passing through the z -axis
  • 环面(Torus)的度规，表面积以及所围体积 - 知乎
    对于下图所示的 环面 结构，本文给出其一些常见的几何性质 首先，我们知道，环面的 参数方程 为： \begin{cases} x\left(u, v\right) = (R_1 + R_2\cos v) \cos u \\ y\left(u, v\right) = (R_1 + R_2\cos v) \sin u \\ z\left(u, v\right) = R_2 \sin v \end{cases} \\
  • Torus - Math is Fun
    A torus is a fascinating 3D shape that looks like a donut or swim ring It is created by revolving a smaller circle around a larger one
  • Torus - Simple English Wikipedia, the free encyclopedia
    A torus (plural: tori or toruses) is a tube shape that looks like a doughnut or an inner tube In geometry , a torus is made by rotating a circle in three dimensional space To make a torus, the circle is rotated around a line (called the axis of rotation ) that is in the same plane as the circle
  • TORUS中文(简体)翻译：剑桥词典 - Cambridge Dictionary
    You can compare the torus to an inflatable lifebelt 更多范例 减少例句 This is a view inside the central chamber - or torus - of the Joint European Torus project for fusion energy
  • Torus Shape – Definition, Examples, and Diagrams - Math Monks
    A torus is a unique three-dimensional shape that looks like a donut Swimming tubes and car or bike tubes are typical examples of the shape of a torus The diagram below shows the shape of a torus
  • Torus - Michigan State University
    A torus is a surface having Genus 1, and therefore possessing a single ``Hole '' The usual torus in 3-D space is shaped like a donut, but the concept of the torus is extremely useful in higher dimensional space as well
  • Torus - Encyclopedia of Mathematics
    A torus is a special case of a surface of revolution and of a canal surface From the topological point of view, a torus is the product of two circles, and therefore a torus is a two-dimensional closed manifold of genus one





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