查询词典 planar developable surface

Characteristics of axial light intensity of planar wave diffractedby small circular aperture.

陈建农，闫金良，王德法，于永江，"受孔径约束抛物面折射系统的分数傅里叶变换"，中国光学快报 5，

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。

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。

We propose a method to cut and map a closed triangular mesh onto a 2D planar domain automatically.

提出一种自动地将任意闭合三角网格切开并保角映射到二维平面域的算法。

Planar discrete clothoid splines and discrete clothoid spline surfaces of Schneider and Kobbelt are just constructed by assuming that the curvature of the curves or surfaces is piecewise linearly distributed.

Schneider和Kobbelt的平面离散布状样条曲线和封闭控制网格上的离散布状样条曲面正是利用曲率逐段或逐片线性分布构造出来的。

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。

D projective collineation provides an ideal mathematical tool for describing planar element correspondence in multiple views.

摘要在描述多视图的几何元素对应关系方面，2-D射影变换是一种有力工具。

Several problems on list colorings, including chromatic-choosability of graphs and Ohba's conjecture,-choosability and-edge-choosability of some planar graphs, and unique list colorability of graphs, especially for complete multipartite graphs, have been studied in this thesis.

中文摘要：本文研究列表染色的若干问题，包括图的色-可选择性和Ohba猜想、某些平面图的-可选择性和-边-可选择性，以及图的唯一列表可染性。

Yap proved that the planar graph with maximum degree △≥ 13 is equitably m—colorable for any m ≥△.

Yap和Zhang[10]证明了：最大度Δ≥13的任意平面图G，对任意整数m≥Δ，都存在均匀m-染色。

The purpose of this thesis is to apply the planar theory technology to flexography for establishing the colorific model.

本文主要研究柔版印刷中三色网点复制呈色的平面规律，建立并验证三色柔印呈色平面模型，并通过多角度分析深入研究柔版印刷的平面呈色理论。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样