中文说明：对球谐函数图形进行仿真,三相光伏逆变并网的仿真，实现了对10个数字音的识别程序包括压缩比、运行时间和计算复原图像的峰值信噪比,外文资料里面的源代码，实现了图像的加水印，去噪，加噪声等功能。
English Description：
The spherical harmonic function graphic simulation, simulation of three-phase photovoltaic grid connected inverter, the realization of the of 10 digital audio recognition program including compression ratio, calculation of operation time and recovery images of the peak signal to noise ratio, foreign material inside the source code, the realization of the image watermarking, denoising and additive noise function.