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A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it.

由完全相交的一个圆锥体和一个平面的交集所形成的闭合的平面曲线。

Circular cone and a plane parallel to an element of the curve.

一个''。'正'。''圆锥体与一个平面相交所形成的平面曲线。

A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve .

一个正圆锥体与一个平面相交所形成的平面曲线。

Complex method and multi-polar coordinate transformation are used here to study the scattering problem of SH -wave to the circular cavity in the half-space with elastic constraints acting on the straight boundary.

利用复变函数法和多极坐标移动技术求解讨论弹性约束边界半空间内浅埋圆孔对稳态入射平面SH(shearing horizontal,反平面剪切)波的散射问题。

There are three parts in our design: first, the dual-band branch line coupler provides two equal-power signals with 90° or -90° phase difference in each operating band. Second, the wideband switching circuit controls the two output powers of branch line coupler to excite the antenna structure for producing linear polarization wave or circular polarization wave. Third, the L-shaped fed conventional planar patch antenna is provided to overcome the coupling effect.

整体架构包含三个部分:L形电容耦合馈入式平面天线是为了克服平面式微带天线窄频的缺点;双频枝干耦合器提供天线在操作的两个频率点上各输出两组相差正九十度与负九十度的讯号,最后宽频的切换电路是将枝干耦合器的两组讯号作分配用以激发不同方向的天线以产生线性极化模态或同时激发两个垂直的天线以产生圆形极化模态。

Triangulation over a convex 2-D domain is implemented by advancing front technique and circumcircle optimizing method, while the triangulation over an arbitrary 2-D domain needs more restriction of the visibility between points.

对于边界已知的平面区域的三角剖分,按照网格前沿方法和外接圆优化准则实现凸边界的平面区域Delaunay剖分,而对于凹边界区域的三角剖分,需增加可见性判断准则,实现对其的三角剖分。

Convex Al plates were also shocked with the confinement of plane glass,and the plane glass's confinement is still effective as long as the plate's circumflexion radius is greater than 400mm.

对于实际工程应用中有重大意义的非规则平面情形下的约束机制,实验表明,在曲率半径大于400mm时平面约束结构的作用依然有效。

In view of this, a one dimension polar distance sequence is obtained first from the closed planar curve and then the auto regressive model of this sequence is used to extract feature vector.

从空间旋转不变的要求出发,首先从平面闭合曲线得到一维极径序列,进而采用该序列的自回归模型来完成特征提取并用于平面曲线的形状分类。

The vanishing points of all lines in the same plane are colinear at the vanishing line of the plane.

同一平面上的所有直线对应的消失点共线于该平面的消失直线。

A calibration model was established by introducing a planar target that could move freely with three collinear and known mutual location points. The calibration point coordinates in a camera coordinate system could be calculated by using the imaging information of three points and the light stripes on image plane of the camera.

引入一个可自由移动的平面靶标,靶标上只需要共线且相互位置确定的3个特征点,利用共线三点建立三点透视数学模型,根据3个特征点以及光条纹在摄像机像面的成像信息,获取了光平面上标定点在摄像机坐标系下的坐标。

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