jiucuoxinneng

WVD Wigner-Ville time-frequency distribution

butterworth滤波器的matlab设计，通带截止频率0.3pi，阻带截止频率0.2pi(matlab butterworth filter design, the passband cutoff frequency 0.3pi, stopband cutoff frequency 0.2pi)

说明：  用S函数来描述PWM算法(Describe PWM Arithmetic use S-Function)(Describe PWM Arithmetic use S-Function)

控制工具箱与SIMULINK软件应用：系统对象为G(s)=4/s(s+2) PI补偿器K1(s)=(s+1)/s K2(s)=(s+0.5)/s a 若由K1(s)与 G(s)串联组成的单位反馈系统，称为系统A。 b 若由K1(s) 放置在G(s)的反馈通道称为系统B。 c 若由K2(s)与G(s)串联组成的单位称为系统C，绘制上述每一种情况的阶跃响应与斜坡响应，求每一种情况下的系统阶跃响应误差与斜坡响应误差，并与理论分析结果进行比较。 (Control toolbox and SIMULINK software application: system object for G (s) = 4/s (s+ 2) PI compensator K1 (s) = (s+ 1)/s K2 (s) = (s+ 0.5)/s If a by K1 (s) and G (s) series of feedback system of the unit, known as a system a. B if the K1 (s) placed in G (s) feedback channel called system b. If c by K2 (s) and G (s) series of unit is called system c, draw the above each kind of condition of step response and slope response, for each of these cases system step response error and slope response error, and the results were compared with theoretical analysis.)

Wavelet denoising For using this code need to use signal toolbox and general toolbox in your matlab In the first part of this assignment, we asked to obtain a (black-and-white) digital image of size 512 by 512 and then generate noisy image by adding a Gaussian noise but under the condition of having SNR=20dB by select the suitable value of variance for Gaussian noise formula. Second step is performing wavelet denoising using the hard thresholding (Use the db 6 for four levels) in the condition of finding the optimal thresholding value of T in terms of the SNR obtained. It means that, we should find the highest SNR value by finding the suitable value for threshold. Then we asked to do the same process but this time using soft thresholding. Finally for the last part of question one, we should compare the results of the obtained SNR with the recommendations of 3*sigma for the hard thresholding and 3/2*sigma for the soft thresholding.

异步电动机数量控制完整仿真模型，可以根据实际情况写该参数，达到研究者所需要的情形(The number of complete induction motor control simulation model, the parameter can be written according to the actual situation, the researchers needed to achieve the situation)

根据逆透视变换原理从交通图像中提取交通参数，可以根据图像的像素坐标计算实际路面的距离，计算车辆的位移，速度等参数(Extract traffic parameters from the traffic image according to the principle of inverse perspective transformation, the actual road distance can be calculated according to the coordinates of the image pixels, the calculation of the displacement of the vehicle speed and other parameters)

Mixture of Gaussian is an example of matlab code that plot miture of more than one gaussian.

飞行器在某高度平飞时舵面偏角和飞行马赫数之间的关系(it describes the relationship between elevator declination and flight mach number，when flight fly on some hight.)

1、熟悉掌握线型表的基本操作在两种存储结构上的实现的，其中以各种链表的操作和应用作为重点。 2、利用顺序存储结构模拟此过程，按照出列的顺序输出各个数的编号。 (1, familiarity with the basic operation of linear form in the two kinds of storage structure on the realization, in which various lists of the operation and application of focus. 2, using sequential storage structure simulation of this process, in accordance with a different number of columns in the order of the output number.)