插值与拟合，解方程，数据分析，包括广义互相关函数GCC时延估计，现代信号处理中谱估计在matlab中的使用，进行逐步线性回归，旋转机械二维全息谱计算，BP神经网络用于函数拟合与模式识别。- Interpolation and fitting, solution of equations, data analysis, Including the generalized cross-correlation function GCC time delay estimation, Modern signal processing used in the spectral estimation in matlab, Stepwise linear regression, Rotating machinery 2-d holographic spectrum calculation, BP neural network function fitting and pattern recognition.