中文说明：完整的基于HMM的语音识别系统，包括主成分分析、因子分析、贝叶斯分析，用于信号特征提取、信号消噪，有详细的注释，包括轨道机动仿真、初轨计算,合成孔径雷达（SAR)目标成像仿真。
English Description：
Complete HMM based speech recognition systems, including principal component analysis, factor analysis, Bayesian analysis, used for signal feature extraction, signal denoising, with detailed notes, including orbital maneuver simulation, initial orbit determination, synthetic aperture radar (SAR) target imaging simulation.