中文说明：该函数用来计算任意函数的一阶偏导数(数值方法),基于小波变换的数字水印算法matlab代码，雅克比迭代求解线性方程组课设,用MATLAB实现的压缩传感，采用热核构造权重，包括单边带、双边带、载波抑制及四倍频。
English Description：
This function is used to calculate any function of the first order partial derivative (numerical method), based on wavelet transform digital watermarking algorithm matlab code, Jacobi iteration for solving linear equation group lessons, for compressed sensing using MATLAB to achieve by thermonuclear structure weight, including SSB, DSB, suppressed carrier and fourth harmonic generation.