pca

PMSM control By PWM signal

DistMesh giving a singular FEM matrix?(Hi Anyone here with some experience of using DistMesh in finite element code? I m solving the scalar Helmoltz equation in an annular region in 2D: rho_1 < rho < rho_2 where rho_1 is the radius of a Perfect Electric Conducting cylinder and rho_2 is where the mesh is truncated using an Absorbing Boundary condition. Now, I ve written code to mesh the region myself (by dividing the region into annular rings and picking a fixed number of points on each ring) and I ve written another program which uses DistMesh to mesh the region. I get a nice solution using my own meshing code but the FEM matrix becomes singular when I use DistMesh. This is the DistMesh Code I used: Circle with hole rABC=1.5 rCyl=0.5 fdstring=sprintf( ddiff(dcircle(p,0,0, f),dcircle(p,0,0, f)) ,rABC,rCyl) fd=inline(fdstring, p ) box=[-2,-2 2,2] [p,N]=distmesh2d(fd,@huniform,0.04,box,[]) I tried changing box and the 0.04 value (initial edge length). But every time, the matrix becomes sin)

常用的MATLAB变成源代码，对初学者的快速入门很有帮助。(Commonly used MATLAB into the source code for the Quick Start very helpful for beginners.)

同步电机模型的MATLAB仿真.........(Synchronous motor model simulation of MATLAB .........)

mcmc 马尔可夫链 蒙特卡罗算法 具体参数 请用help命令(MCMC Markov chain Monte Carlo algorithm specific parameters Please help command)

说明：  matlab涉及到的常用矩阵基本操作、算法，和一些简单的使用例程(matlab matrix related to the common basic operations, algorithms, and use some simple routines)

this is the function of the the differential of equation that program the modeling

通过大规模求解超越方程组给出颗粒体系共振关系中的虎纹斑图形，全部运行时间约40秒(Through large-scale solution of equations gives the particles beyond the resonance relations system tiger spot graphics, run all the time about 40 seconds.)

Matlab中的高光谱图像中的端元提取算法(An algorithm for the extraction of the end elements in hyperspectral images in MATLAB by Liuliu)

Matlab code for BER in binary phase shift keying