直线坐标系

本文研究的重点是减少计算时间，首先应用周期性边界条件，将计算区域始终限制在一个光子晶体元胞内，对于非正交结构的光子晶体，采用了非正交直线坐标系。

First , periodical boundary condition is used to make space domain in a photonic crystal unit cell , and for non-orthogonal crystal , non-orthogonal coordinate system is adopted .

在所有相互作匀速直线运动的坐标系中，自然定律都是相同的。

All laws of nature are the same in all c.s.moving uniformly , relative to each other .

然后采用小波变换和Hough变换相结合的方式对特征线进行识别、提取，再参照直线方程与全局坐标系的关系，实现对波动视频序列的运动估计。

Then , adopt the combination of wavelet transform and Hough transform to complete identification and extraction of feature line and consult the relation between feature line equation and global coordinate system to finish motion estimation of fluctuant video sequence .

质点匀速匀变速直线运动在直角坐标系中的数学描述

A Mathematical Description of Uniform Velocity Motion and Uniformly Accelerated Motion in Cartesian Coordinate System

计算空间直线在两摄像机坐标系中的位置信息，得出两摄像机间的旋转矩阵。

By calculating spatial beeline coordinate information in the two camera coordinate systems , the rotation matrix between two cameras could be obtained .