sem_MATLAB_vectormanip

说明：  实现了无需水平集重新初始化的水平集演化，速度有极大提高(Achieved without re initialize the level set evolution, the speed greatly improved)

串级控制系统matlab仿真的一个实例，对化工过程中的一个过程进行串级控制，优化，用到PID算法(Cascade cascade control system matlab simulation of an instance of a process in the chemical process control, optimization, used in the PID algorithm)

matlab下的神经网络感知机实验代码，提供给有需要的人(matlab neural network under the experimental code Perceptron)

对正交频分复用中的信号发射利用matlab程序进行了仿真(On orthogonal frequency division multiplexing signal transmission in the use of process simulation matlab)

RSSI强度值采集例子，每隔一段距离采集一段RSSI值，从matlab中绘制折线图，并由最小二乘法分析你合成曲线(RSSI strength values ​ ​ collected examples, at some distance acquisition period of the RSSI value, the last drawing, analyze your synthetic curve by the least squares method)

基本复合型寻优程序，用于目标函数值最优情况的寻找(The basic compound optimization procedure to find the optimal conditions for the objective function value of)

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.

图像2倍上采样和下采样，快速且准确，成像效果较好。(Photo 2 times upsampling and downsampling, fast and accurate.)

phase_shift_deadtime.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(phase_shift_deadtime.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

说明：  在matlab环境下的一个朴素贝叶斯分类器，大家可以看下(Matlab environment a Naive Bayes classifier, we can look)