教你使用GLFW创建OpenGL窗口，并绘制带半透明的图形。,Teach you to use GLFW to create OpenGL window, and draw with a translucent graphics.

半带滤波器的设计,半带滤波器在设计准确重建性能的滤波器-The design of half band filter, half band filter performance of the filter in the design of accurate reconstruction