中文说明： 采用偏最小二乘法，空间目标识别，采用PM算法，信号处理中的旋转不变子空间法，用平面波展开法计算二维声子晶体带隙,包括回归分析和概率统计，混沌的判断指标Lyapunov指数计算。
English Description：
Using partial least squares, space target recognition using PM algorithms, rotation-invariant subspace methods in signal processing using plane-wave expansion method for calculation of band gap of two-dimensional phononic crystals, including regression analysis, and probability and statistics, index of chaos Lyapunov index.