包括回归分析和概率统计，FIR 底通和带通滤波器和IIR 底通和带通滤波器，包含特征值与特征向量的提取、训练样本以及最后的识别。- Including regression analysis and probability and statistics, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition.