per_nr_hard

matlab实用程序 弹出式菜单的引用，通过matlab应用软件来实现这一功能(matlab utility pop-up menu reference, through matlab software to achieve this function)

DTC变化，傅里叶变换，基于DCT的压缩变换(DTC changes, Fourier transform, DCT-based compression transform)

A Guide to MATLAB Object-Oriented Programming - Andy H. Register

说明：  用matlab开发的fft频谱分析程序！(matlabfft)

信号与系统基础知识包括连续信号与模型、离散信号与模型；常用信号变换包括Z变换、Chirp Z变换、FFT变换、DCT变换和Hilbert变换等；离散系统结构包括IIR、FIR和Lattice结构；IIR滤波器设计包括模拟和数字低通、高通、带通与带阻滤波器设计，以及基于冲激响应不变法和双线性Z变换法的IlR滤波器设计等；FIR滤波器设计包括基于窗函数、频率抽样法和切比雪大逼近法的FIR滤波器设计；平稳信号分析包括经典功率谱估计、基于参数模型的功率谱估计和基于非参数模型的功率谱估计；非平稳信号分析包括STFT变换、Gabor展开、Wigner-Ville分布与Choi-Williams分布；非高斯信号分析包括基于非参数法的双谱估计、基于参数模型的双谱估计，以及双谱估计的应用；信号处理的GUI实现包括滤波器设计与分析的FDATool工具和滤波器设计与信号分析的SPTool工具。(signals and systems based on knowledge, including continuous signal with the model, discrete signal and model; Common signals include transform Z transform, chirp Z-transform, FFT transform. DCT and Hilbert transform; Discrete system architecture including IIR, FIR and Lattice structure; IIR filter design, including analog and digital low-pass, high-pass, band-pass and band stop filter design, Based on the impulse response of the same law and bilinear Z transform the IlR filter design; FIR filter design including on the basis of the window function, frequency sampling and snow all over the big approximation of FIR filter design; stationary signal analysis include classical power spectrum estimation, Based on the model parameters of the power spectrum estimation and non- parametric model b)

三相PWM整流电流预测仿真。。。。。。。。。。。。。。。(PWM matlab)

模态分析，用FFT对输入的激励信号提取振动的频率(Modal analysis using FFT excitation signal input to extract vibration frequency)

说明：  可以画出基本的EIS曲线，但是参数需要根据具体燃料电池变化(Basic EIS curves can be drawn.)

This program uses matlab to fullfil QPSK and demodulate QPSK.

蚁群算法的最基本算法matlab实现。适合初学者学习。(Matlab basic ant colony algorithm implementation. Suitable for beginners to learn.)