3inverter180

说明：  用matlab中的FFT函数实现了正弦信号，矩形信号，和白噪声的频谱分析(FFT with matlab function in a sinusoidal signal, the rectangular signal, and white noise spectrum analysis)

录制自己的一段语音，时间控制在15秒到30秒左右；利用wavread函数对自己的语音进行采样，记住采样频率。 （1）画出原始语音信号的时域波形，而后以1秒为间隔，求出每秒数据的功率谱。 （2）根据语音信号特点，分别设计FIR及IIR滤波器，分别画出滤波器幅频和相频特性曲线。用设计的滤波器对信号滤波，画出滤波后时域波形。用sound函数回放语音信号。 （3）求出特征频段语音信号随时间变化的曲线（每间隔0.05秒求一次功率谱）。 (Record your own voice for some time (15 seconds to 30 seconds) use wavread function of the voice samples, remember the sampling frequency. (1) Draw the original speech signal in time domain waveform, and then to 1 second intervals, the data obtained power spectrum per second. (2) According to the voice signal characteristics, FIR and IIR filters were designed, namely to draw the amplitude and phase frequency characteristic curve. With the design of the filters on the signal filtering, to draw the filtered time-domain waveform. Playback with sound function of the speech signal. (3) Find the characteristic band speech signal curve over time (0.05 seconds intervals seeking a power spectrum.))

信号与系统中傅里叶变换相关函数，可方便实现信号的频域分析(Fourier transform of the correlation function of signals and systems, can easily achieve the signal frequency domain analysis)

单向晶闸管整流电路仿真模型，可参见电力电子教材(Unidirectional thyristor rectifier circuit simulation model can be found in power electronics textbooks)

MiTeC System Information Component Suite 10.92

LSTM的matlab工具箱，亲测好用，内有案例文件，可放心学习(matlab toolbox for LSTM)

说明：  零件参数设计：优化零件的参数设计，提高机器效率。(Part Parameter Design: Optimizing the parameters of components designed to improve the efficiency of the machine.)

license plate recognition and find type of vehicle- private/public

数值分析中经典的arnoldi算法，用来求解大型矩阵方程组的求解(numerical analysis classic arnoldi algorithm used to solve large matrix equations Solution)

说明：  介绍matlab，以及基本的用法和操作，非常适合初学者(Introduction matlab, and basic usage and operation is very suitable for beginners)