Combining the project instance with the use of the approximate adjustment to analyze the deformation , this paper discusses the influence of the net structure of the deformation monitoring network on stability inspection of control points 摘要讨论了变形监测网的网形结构对网点稳定性检验结果的影响，当网中拟稳点组无法独立构成网形时，其馀动点的位移将对拟稳点在各观测周期间的坐标值变化产生影响，致使其点位的稳定性分析结果受到影响。
Secondly , the problem of the curve - surface mutual transforming and smooth - finishing have been analyzed farther . for the surface intersecting problem : owing to the introduction of the boundary points , as long as the intersecting points on a certain line , the full intersecting line can be gained . the intersecting line either intersects at the boundary of the triangle surface or forms the loop ; during the course of tracking , the selecting of the pace is restricted by the curvature , the number of the gained intersecting points are not in proportion as the chord - length ; the intersecting points not only record the coordinate and store the parameter 对两曲面求交问题，当曲面细化足够小时，曲面求交可近似看成曲面与平面相交问题，引进了边界点的概念，因此只要知道交线上的任意点，就可以将跨越许多曲面片的整条交线计算出来，所求出的交线或者跨越曲面的边界，或者形成交线环；从初始点出发跟踪求解整条交线的过程中，步长的选择采用了通过曲面片曲率来约束的方法，用该方法求出的交点在不同曲面片上的分布数目不与弦长成正比；该求交方法包含了各曲面片的边界线与交线的交点的求解，可获得边界交点的坐标值及其参数值。
In the first algorithm , a solution to transcendental equations is converted into a solution to roots of a monic polynomial , and the latter can be fulfilled easily by using functions roots or solve in matlab . in the second algorithm , taking advantage of the property that the distance between solves in a circular domain and the center of the circle is less than that of solves out 方法一：将对超越方程的求解转化为对首一多项式的根的求解，然后利用matlab的roots或solve函数进行求解；方法二：利用圆形区域内超越方程的解与圆心的距离小于区域外的解与圆心的距离和fsolve函数求解方程时优先搜索离初值最近的解的特点，将圆心坐标值作为fsolve函数求解的初值，先求解出包含指定区域的圆形区域内的解，再从中找出指定区域内的解。
By visual - feedback signal which is defined in three - dimensional space coordinates or directly in terms of image features , the control structure of visual servoing is classified as image - based and position - based . by analyzing the two control structures , their advantages and disadvantages are presented . in the third chapter , camera calibration method is studied 依据视觉反馈信号表示的是3d空间坐标值还是图像特征,视觉伺服系统的控制结构可以分为基于位置的控制方式和基于图像的控制方式,本文对这两种控制方式进行了分析,并给出了这两种控制方式的优缺点。
The chief principle is based on the front intersection measurement aided by two electric theodolite . the laser emitter casts light , spots on the antenna surface and gets the 3d coordinates of the sample data . then , the surface precision of the antenna can be obtained by corresponding data processing 雷达天线检测原理是由激光目标发生器投射光点，两台电子经纬仪前方交会测量，得到采样点的三维坐标值，再进行相应的数据处理，最终对天线面的变形情况和蒙皮表面加工误差作出评价。
The values of r subtracted by g of the given citrus , leaves , or branches are very similar , but the values of g subtracted by b or r subtracted by b of citrus are different from that of leaves and branches . a rule for segmenting citrus from background was put forward that the pixel belongs to citrus if the value of r subtracted by b larger than the threshold value ( t ) , which was developed by dynamic threshold segmentation method , otherwise the pixel belongs to background 研究发现水果、树叶、树枝三者间的r与g的对应坐标值基本上分布在45对角线上；树叶、树枝的g与b和r与b的对应坐标值分布在或接近于45对角线上，而水果的g与b和r与b的对应坐标值偏离45对角线，分布在45对角线下方，且果实的r - b的平均差值比g - b的平均差值要大。
After direct manipulation of radius , constant or variable radius area in mesh model can be modified quickly and exactly . using this method , rounding shape of a part or die can be directly modified on shell meshes for finite element analysis . ( 3 ) data segmentation on shell meshes is studied 对于已有的圆角过渡区域网格,根据圆角过渡特征与基网格面的相切关系以及给定的新的圆角半径,计算出轮廓线上各顶点对应的坐标,直接修改顶点的坐标值,保留网格模型原有的拓扑结构,使形成的新的网格与原有网格融为一体。
The main contents and results in this paper are as follows : firstly , the digital image processing technique is used for recognize the coordinates of the landing - points . then , based on these coordinates , the mathematic model is built up , and the weights of effecting factors are evaluated 本文的主要研究内容和取得的成果如下: 1 .提出了通过图像识别的方法来自动采集舰载机降落在舰船上的落点坐标值;建立了直升机的落点位置分布模型,给出了各影响因素的权重;并可以对落点坐标位置进行预测。
Some examples are given in this dissertation . first , the coordinate values of a group of discrete points on the cam profile are achieved by conventional design method which are then used as measured data of the cam profile . then the kinematic analysis of the cam mechanism is performed by the method developed in this paper 本文以已知从动件运动规律的凸轮机构为例，利用正设计方法求出凸轮实际廓线一组离散点坐标值，并以此作为凸轮检测数据，运用本文提出的分析方法进行运动反求，并将反求所得结果与理论结果加以分析比较。
Using 4d coordinate to express the convert matrix of perspective , it is predigested to calculate z coordinate through changing to one . the coordinates of pixels in screen correspond with the z coordinate of object surface are modified by adding the numbers of buffer . the method of 3d perspective using directx buffer is improved 使用四维坐标来表示物体的透视变换矩阵，通过对该矩阵进行归一化处理，简化了z坐标的计算；通过增加帧缓冲区的数量，修正了物体表面z坐标在屏幕上对应点的坐标值，对利用directx的缓冲区进行物体三维透视的方法进行了改进，提高了透视精度。
