制作自己的PHP+MYSQL的类,使用类封装常用SQL操作，简化代码.认识面向对象在开发中的重要作用.-Make your own PHP+ MySQL class, the use of such packages commonly used SQL operations, simplify the code. Recognize the important role of the object-oriented development.

matlab 36段人种识别视频资料,分别包含高加索人种，蒙古人种，尼格罗人种。-matlab 36 race recognize the video data segments, each containing Caucasoid, Mongoloid, Negroid.