中文说明： 窗函数法设计一个数字带通FIR滤波器，用平面波展开法计算二维声子晶体带隙,基于负熵最大的独立分量分析，关于非线性离散系统辨识，在matlab环境中自动识别连通区域的大小,多元数据分析的主分量分析投影。
English Description：
Window function to design a digital bandpass FIR filters using plane-wave expansion method for calculation of band gap of two-dimensional phononic crystals, independent component analysis based on maximum negentropy, identification of nonlinear discrete-time systems, automatic identification of connected regions in the MATLAB environment size, projection principal component analysis of multivariate data analysis.