圆心

介绍了基于AutoCAD绘图平台用VISUALLISP语言编程计算任意不共线三点的圆心坐标；并介绍同时绘制图形以及生成部分加工程序的方法。

Introduces the method of calculating the centre of a circle coordinate of 3 unconditional and unco-linear points and drawing graphs and generating part of process procedures on AutoCAD using Visual LISP language .

圆周上各点离圆心的距离相等。

All points on a circle are equidistant from the centre .

设取∠aob为一个圆的圆心角。

Let angle AOB be taken as a central angle of a circle .

圆的直径必相交于圆心。

The diameter of a circle must go through the center .

直径从圆心穿过。

A diameter passes through the center of a circle .

她的生活是以让Kate活着为圆心的

Kelly Her life now revolves around keeping Kate alive .

基于广义Hough变换的圆心坐标快速提取方法

Fast Extracting the Coordinates of Center of Circle Based on Generalized Hough Transform

采用AUTOCAD制图软件解读摩根成品孔孔型2R圆心位置

Decoding the Circle Center Position 2R of Morgan Finish Pass with Drawing Software AUTOCAD

最后再根据圆心坐标使用PID算法实现对加载装置的定位。

Finally , manage to fix the position of the loading equipment with PID algorithm according to the coordinate of the center of the circle .

若入射角限定在0&π变化，则圆心和圆弧都分布在Kx～Kz的下半平面；

If the incident angle (ψ) ranges from 0 to π, the center and the circular are are distributed in the lower half of Kx-Kx plane .

用改进的广义Hough变换获取靶纸图像子像素级圆心坐标

Acquiring the Sub-pixel Coordinates of Center of Circle of Target Image by Using Revised Generalized Hough Transform

对称规范下Landau体系的圆心相干态

Center Coherent States of the Landau System Under the Cylindrically Symmetric Gauge

Landau规范下均匀磁场中带电粒子圆心相干态计算

Calculation on Center coherent states of charged particles in a uniform magnetic field under Landau gauge

最后基于边缘点及其方向改进Hough变换，提取篮球圆心和半径。

Lastly , based on edges and their orientations , Hough transform is improved to get the circle center and the radius of basketball .

计算Mark区域中心点，Hough变换圆心累加范围限制在这个中心点附近区域。

CIRCLE OF LIFE Knowledge Accumulating Skill By computing the center of the Mark region , the accumulating range of circle center in Hough transform is restricted near this center .

利用改进Canny算子及曲线拟合定位虹膜的外边缘及圆心，提高了虹膜定位的精确度。

After contrast enhancement and smoothing preprocessing , the outer edge is located with an improved Canny operator and a curve fitting technique .

利用三点定圆法计算出印鉴的圆心和半径，提取到印鉴的ROI。3、计算印鉴偏转角度的研究与计算。

The circle center and radius of seal are calculated with three point determination method of circle , and then the ROI is extracted . 3 .

首先，根据虹膜图像的边缘图像用圆检测随机Hough变换方法提取瞳孔的圆心与半径；

Based on this idea , circle detection random hough transform is used to extract pupil circle center and radii from the edge map of iris image ;

在PLEACH算法中，网络以Sink节点为圆心来划分网络，但Sink节点处于网络边缘，会出现簇头分布不均匀。

In the PLEACH if the Sink node is not in the center of the network , the clusters will distribute unevenly .

电炉圆心底出钢（RBT）用耐火材料

Refractories for round bottom tapping ( RBT ) of EAF

这是一个向量场，其中旋转轨道是，以z轴为圆心的圆周，并且这个向量场与每个圆相切。

That is a vector field in which the trajectories are going to be circles centered in the z-axis and our vector field is just going to be tangent to each of these circles .

本研究采用了Hough变换来检测尿液图像中红细胞的圆心。

Our research adopts the Hough transform to detect the centre of red cell in urine image because the shape of red blood cell in image is circle .

李强等在已知三个型值点时，通过直接给出控制顶点和权因子的方法得到用二次NURBS精确表示圆弧的方法，但只给出圆弧的圆心角小于π的情况。

An approach of representing circular arcs with NURBS of degree two was given by others , but it was based on the hypothesis that the arc angle is less than n.

该算法利用图像边缘的梯度方向信息，很好地解决了一般Hough变换的无效累积问题，可以快速检测出圆心坐标。

The cumulation in common Hough transform can be greatly solved by using gradient direction information of image edge , and the coordinates of the center of circle can be quickly detected .

采用边缘慢、中部快的变速扫描方案，密化了有效采样点，使圆心坐标在X，Y方向的重复度均小于4μm。

Effective sampling points are thickened by using a variable-speed scanning scheme , i.e. , scanning speed is low at hole edge and fast in the center , thus both repeatability at X and Y directions of the central coordinate are less than 4 microns .

本文提出在用圆心曲线和圆点曲线进行刚体导引时，采用AUTOCAD绘图软件包的指令文件，可自动生成圆心曲线和圆点曲线图形；

It is proposed in this article that in rigid guiding by means of deferent and circular point curve , the deferent and the circular point curves can be automatically generated using the instruction document in the AUTOCAD software paekage ;

标定时，使CCD摄像机沿着二维图像测量系统的导轨移动，采集加工有1个圆孔的靶标件的图像，计算圆心在图像中的位置。

By moving the CCD camera according to the track of the two-dimensional image measurement system , an image of the drone with a round hole is collected , and the location of the center of the hole in the image is calculated .

此时的Cole-Cole图在复ε平面上成为一段圆弧，圆心在实轴以下。

The Cole - Cole plot appears to be a segment of arc in the complex ε plane , and the center of circle is below the real axis .

用CCD光电传感器获取图像，通过图像识别确定圆心坐标，按几何关系计算出孔系空间夹角，可将三维测量简化为二维测量。

Three-dimensional measurement can be simplified to planar measurement through a series of steps : firstly , acquire the image by CCD photoelectronic sensors ; then recognize the centre of a circle by image processing and calculate the space included angle for the relative position of hole series .

用CCD摄像头摄取标定点图像后，计算各像素的梯度值，设定一定的阈值，提取出过渡区域的像素，利用这些像素的位置信息和灰度信息求解标定点圆心的位置。

After getting the images of calibration points by CCD cameras , we can calculate the gradient of pixels , distill the pixels of transition area through a settled threshold , and use the position and gray information of these pixels to calculate the center of the calibration points .