查询词典 perpendicular

Therefore, the 'generalized velocity unit' was introduced on the assumption that the surface velocity in the direction perpendicular to the line is a steady velocity frame with the topographic relief. The 3-D tomostatics velocity inversion was improved to suit the crooked wide line geometry.

为此，在假设垂直测线方向上表层速度是随地形起伏的稳定速度结构的情况下，引入"广义速度单元"概念，对三维层析静校正速度反演过程加以改进，使其适合宽、弯线资料观测系统。

You need to know what the cross product is and what it means geometrically (a vector perpendicular to the vectors with a length equal to the sine of the angle between them).

你需要知道向量积是什么，以及它的几何意义(一个和两个向量都垂直的向量，长度等于原来两向量的长度乘以两向量的夹角的正弦)。

With the two vectors, v1 and v2, it is now possible to compute the cross product between them to find a perpendicular vector to the face.

有了两个向量v1和v2，现在我们就可以计算叉乘，来找到正交于面的一个向量。

A rule having a short , sometimes sliding , perpendicular crosspiece at one end , used by drafters for establishing and drawing parallel lines .

丁字尺：尾端装有可滑动的垂直短横档的尺子，绘图员用它来设制或画平行线

Had determined the rubber aerocyst model and the material"s parameter, analyzed the change of the curtain line geometry characteristic during the operation process of air spring with the mechanics performance change as well as gas solid coupling between the gas unit and the rubber aerocyst wall with the non-linear finite element analysis.despite of the influence The rubber piles did to landscape orientation rigidity and the perpendicular rigidity, more importantly, it could temporarily support the vehicle"s body when the spring capsule leaks air or bursts, enable the vehicle has a good traffic safety, this article has also carried on the detailed analysis about it.

橡胶堆除了对垂向刚度和横向刚度有影响外，更重要的是，当空气弹簧胶囊漏气或破裂的时候，可以暂时地起支撑车体的作用，使行车安全有了保障，本文对此也进行了详细的分析。

For section displays, the cutting plane is assumed to be perpendicular to this line.

为显示指定一个浏览方向，切割平面假设与这条线垂直。

A section created by a plane cutting a solid perpendicular to its longest axis.

由一平面横切某物，通常与轴线成直角切割形成的断面。

Part four will prove the following 4 theorems : theorem 1 :the curvature and torsion of the locus of foot point of the perpendicular line between the origin and the tangent line of the cylindrical spiral remains to be function t , but not trigonometric function t .

第四部分证明四个定理分别为定理1 由坐标系原点至圆柱螺线的切线所引垂线的垂足的轨迹曲率和挠率仍为t的函数，但不是t的三角函数。

A cylindrical surface or solid all of whose sections perpendicular to the elements are elliptical.

角棱镜是由3个互相垂直的反射平面组成。

The method introduced recently by Li Guohong was used to produce AlCuCo decagonal quasicrystalline films, with different thickness. All the films have the same orientation that the ten-fold axis is perpendicular to the films.

我们采用新近报导的D相薄膜生长方法，制备了完全取向的D相AlCuCo薄膜，并利用薄膜样品的优势，对D相准晶的特性进行了光学和电学方面的研究。

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％。