曲面

A new method is discussed that can be used to model the part surface by finite element method .

提出了一种基于有限元描述目标形状曲面，构造基本体群成形面的方法。

Properties of Curves, Surface in Three Dimensions, The First Fundamental Form

课程内容：平面与空间中曲线，曲率和挠率，全曲率，同周边不等式，曲面的基本式，平

Then use this moving frame to compute the coefficients of the first fundamental form E, F, G and the coefficients of the second fundamental form L, M, N.

利用这个标架，计算曲面S的第一基本形式的系数E，F，G和第二基本形式的系数L，M，N。

In this article we induce and study the physical background ,definition, quality ,and calculating method of the curve and surface integral of the first kind ,and at the base of these , calculate formula and providence was proposed in the special coordinate transformation.

摘要本文归纳研究了第一型曲线积分与曲面积分的物理背景，定义，性质及计算方法，并在此基础上给出了它们在特殊坐标变换下的计算公式及证明。

It is convenient to the surface of the fitting room.

可以很方便的拟合空间曲面了。

It can cut fluting on both inside and outside foam surface, and can cut irregular curved surface; it reduces distortion caused by cutting thread's thermal deformation and extends shaping category of foam product.

改变了切割泡沫的单一方式，增加了泡沫体表面的内外槽切割功能和不规则曲面切割功能。减小了切割丝热变形现象，扩展了泡沫产品的成形种类。

Foredeck plates pulled down against camber of deck beams.

前甲板板推倒对曲面的甲板梁。

On the basis of vector shearing of four graphical primitives: line, polygon, surface and text, the author established a relatively perfect vector cut model for 3_D digi...

以线条、填充多边形、曲面和注释 4种图元的剪切为基础，建立了一个较为完善的盆地三维数字构造-地层体的矢量剪切模型，并且编制了相应的软件。

On the basis of vector shearing of four graphical primitives: line, polygon, surface and text, the author established a relatively perfect vector cut model for 3-D digital tectonic-stratigraphic basin, and, furthermore, wrote the corresponding software.

以线条、填充多边形、曲面和注释4种图元的剪切为基础，建立了一个较为完善的盆地三维数字构造-地层体的矢量剪切模型，并且编制了相应的软件。

In this paper, one of the key techniques of reverse engineering, 3D measurement method of free form surface, is studied.

本文研究了逆向工程关键技术之一——自由曲面的三维测量技术。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。