1) ?projection eccentric
投影偏心
2) PP-skewness
投影偏度
1.
An approach for testing multinormality based on the PP-skewness and PP-kurtosis test by using PP method and Bootstrap method is proposed.
本文研究了多元分布的正态性检验问题,用投影寻踪自助法,获得了投影偏度和投影峰度正态性检验统计量,证明了在零假设成立时,所提出的偏度和峰度检验统计量的极限分布为一高斯过程的上界。
3) project migration
投影偏移
1.
The author and his colleagues have devoted to study project migration imaging since 1994,which includes 3-D (2-D) pre-stack (post-stack) depth (time) domain project migration etc.
笔者和同事从 1994年开始一直致力于投影偏移成像的研究。
4) central projection
中心投影
1.
In this paper, according to the characteristics of central projection, aerial photographs were analyzed to discuss displacement of images under tilt conditin or caused by ground undulation, based on which the principles of tilt error and projection error were summarized.
根据中心投影的特性，论述了像片在倾斜条件下所引起的像点位移和像片因地面起伏而引起的像点位移，在对其进行分析的基础上总结出倾斜误差和投影误差的规律，从而说明了不能把像片当作地形图使用。
2.
Based on the analysis of Kruppas theorem and geometric methods sufficient and necessary conditions that figure Φ is a central projection of the space affine coordinate system are put forward in this paper.
本文通过对库鲁巴定理的分析，采用几何方法得出了图形Φ为空间给定仿射坐标系中心投影的充要条件。
5) projection center
投影中心
1.
This paper proposes an iterative golden section search method based on reconstructed slices evaluation of a string to achieve precise projection center,as well as detector s rotate/tilt angle and distance from x-ray spot to rotate center.
为此,文章提出了一种基于细琴弦重建图像评估的黄金分割迭代搜索法来精确确定投影中心,还可确定射线源与旋转中心距离以及探测器安装旋转角、倾斜角等参数,实验证明了该方法的有效性。
2.
The privipal steps of constructing of diagram for perspective reversion are to find out the projection center and to locate the perspective axis at suitable position.
透视反转作图的主要步骤是找出投影中心和确定透视轴的位置。
6) Exp projection
外心投影
补充资料：在AutoCAD中偏心圆锥与偏心圆台实体的画法
现在要画一个偏心圆锥,底面在WCS的XY平面上,圆心(0,0,0),半径100,顶点(300,0,400)在ZX平面上.
1)连接PA,PB. A(-100,0,0) B(100,0,0)
图1
在当前坐标下:
2)延长PA到C,使PA=CA;延长PB到D,使PB=DB;
3)连接CD;
4)以CD为直径画圆;
5)用XLINE命令中的二等分选项作角CPD的角平分线PO,交CD于O;
6)过O作CD的垂线,交圆于E,F;
图2
7)用三点UCS命令,取三点为:O,P,C;
8)过点O作PO的垂线GO,交PC于G;
图3
9)再次用三点UCS命令,取三点为O,F,G;
10)现在就可以画椭圆锥了!
cone-e-c-捕捉O点-捕捉F点-捕捉G点-a-捕捉P点;
图4
11)回到WCS,剖切椭圆锥
SL-选择椭圆锥-回车-XY-回车-捕捉P点.
12)删除辅助线条.
图5
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条