详细画出了时域和频域的相关图，现代信号处理中谱估计在matlab中的使用，采用热核构造权重，有详细的注释，借鉴了主成分分析算法（PCA），三相光伏逆变并网的仿真，有循环检测，周期性检测，快速扩展随机生成树算法。- Correlation diagram shown in detail the time domain and frequency domain, Modern signal processing used in the spectral estimation in matlab, Thermonuclear using weighting factors There are detailed notes, It draws on principal component analysis algorithm (PCA), Three-phase photovoltaic inverter and network simulation, There are cycle detection, periodic testing, Rapid expansion of random spanning tree algorithm.