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实现弧度向角度的转换，判断在第几象限。。。。。。(Realize the conversion of radian to angle and judge the quadrant)

说明：  二维雷诺方程的matlab有限差分算法。(Matlab finite difference algorithm for two-dimensional Reynolds equation.)

说明：  通过两点法 计算水波的反射系数 海洋工程领域实用代码(The reflection coefficient calculation by two points method. Useful code for ocean engineering.)

一个训练管理系统 VC++6.0 + SQL 2(A training management system VC++ 6.0+ SQL 2)

MATLAB 实现的神经网络人脸识别 视频教程哦(MATLAB neural network realization of video tutorials Oh Face Recognition)

说明：  选取四个点，自动判断是否在一个平面上。同一个平面上。则绘制一个多边形。不在一个平面，则以前三个点为底面，构成一个椎体。支持Move等转换命令，存图与开图，实现Jig交互绘制等。(Four points are selected to automatically determine whether or not they are on a plane. On the same plane. Draw a polygon. If it is not in a plane, the first three points are at the bottom, forming a vertebral body. Support Move and other conversion commands, save and open maps, Jig interactive rendering, etc.)

DFB激光器的仿真模拟,通过数值计算，可以仿真阈值等特性(DFB laser simulation)

说明：  FPM 傅里叶衍射重叠相位恢复技术程序代码 PIE相关(fourier ptychography microphy)

哨兵-2号数据处理教程，采用dos命令处理，包括大气校正、重采样等(Sentinel-2 data processing tutorial, using DOS command processing, including atmospheric correction, resamping, etc)

说明：  solidworks工程图批量生成DWG和PDF,单目录(solidworks VAB SLDDRW to PDF DWG)