spiht

此程序写了，任意给定两个数，互相作为底数和指数，再求和。如果不满足条件，报错。(This program was made, any given two numbers to each other as the base and index, and then sum. If does not meet the conditions, an error.)

this file is a simulation of simple boost control in z_zource inverter

说明：  Welch法功率谱密度 Psd自功率谱 是用改进的平均周期图法来求随机信号的自功率谱估计 采用信号重叠分段，加窗函数和fft算法等计算一个信号的自功率谱估计（PSD）

目标因子分析，用于找寻主因子数的个数，清晰明了的看出其步骤(Target factor analysis, to find the main number for the number of factors, see the steps clarity)

单自由度振动系统，求其频响函数，改变质量，阻尼，刚度对频响函数的影响(Single degree of freedom vibration system, find the frequency response function, changing the impact mass, damping and stiffness of the FRF)

内部资料，很经典的MIMO和OFDM的课本程序，以供大家参考(it is important MIMO-OFDM program)

time series learning

machine learning中最经典的图书(The most classic machine books learning)

sonar interfacing code on ardino

快速傅氏变换的简单实现，可进行快速频谱分析(Simple implementation of the fast Fourier transform, fast spectrum analysis)