Gradient_Descent_Filal1

基于MATLAB平台的PWM调制正弦波的快速傅里叶分析(his model simulates and computes Fourier analysis of PWM based sinusoidal waveform. Fundamental frequency can be changed in model properties. Amplitude modulation index and frequency modulation index can be adjusted in Simulink model directly.)

支持向量回归机的参数选择程序，通过交叉验证选择惩罚参数、损失函数以及核函数(SVM parameter selection procedure)

无线传感器的定位与分簇，定位基于三边定位法，路径基于最短距离查询的matlab源代码。其中三个文件一个为主程序，两个子程序一个用于三边定位节点选取和定位。(And cluster localization of wireless sensor, position the three edge positioning method based on distance, shortest path query based on Matlab source code. One of the three file of a main program, two subroutines for a three edge node selection and location.)

实现孤岛检测,在单逆变器或者多逆变器并网运行时，由于故障情况导致的逆变器与主网分离，而产生的不正常现象，可以采用孤岛检测方法实现孤岛检测。(For detecting an island, in a single inverter, or inverter parallel operation, caused by the fault condition of inverter and provids separation, produce abnormal phenomenon, an island detection method can be used for detecting an island)

It should be noted that there is still room to improve the speed and the memory usage of the algorithms, using for instance displacement structure algorithms for the RQ decomposition and Lanczos algorithms for the SVD.

运用谱减法，对语音信号进行去噪处理并比较处理前后的信噪比(Using spectral subtraction to denoise the speech signal and compare the signal to noise ratio before and after processing)

This code is improving parts of the image with imcrop according to the 2-D histogram (mesh).

matlab力学、电磁学、光学等物理实验模拟 (matlab physics simulation)

matlab宝典电子版上，陈杰等编著，电子工业出版社出版。(A third edition of the electronic version of the book matlab, Chen Jiedeng edited, Publishing House of Electronics Industry.)

matlab解线性方程组的源代码 function x=nagauss2(a,b,flag) ％ 用途：选列主元Gauss消去法解线性方程组ax=b ％ 格式：x=nagauss2(a,b,flag) a为系数矩阵，b为右端列向量，flag若为0，则显示中间过程 (Matlab solution of linear equations source code function nagauss2 x = (a , b, flag)% purposes : a selection PCA Gauss elimination method for solving linear equations ax = b% Format : nagauss2 x = (a, b, flag) for a coefficient matrix, b subguadratic column vector, if the flag is 0, then showed intermediate process)