中文说明：鲁棒性好，性能优越，该函数用来计算任意函数的一阶偏导数(数值方法),旋转机械二维全息谱计算，包括调制，解调，信噪比计算，可以实现模式识别领域的数据的分类及回归，数据模型归一化，模态振动。
English Description：
Good robustness, superior performance, the function used to calculate any function of the first order partial derivative (numerical method), rotating machinery two-dimensional holographic spectrum calculation, including modulation, demodulation, signal to noise ratio calculation can achieve the classification and regression of data in the field of pattern recognition and data model belongs to a modal vibration.