nice_pmsm

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)

将数字信号转换为模拟信号的电路称为数模转换器（d/a转换器或dac）(digital to analog converter)

Matlab code for 4-connectivity and 8-connectivity neighbours

最小二乘算法分享下，希望对大家能够有所帮助(Least-squares algorithm to share, it is hoped to be able to help everyone)

说明：  定义法求解Lyapunov指数方法，精度比较低。(Index definition methods of Lyapunov method, the accuracy is relatively low.)

说明：  MATLAB求解延迟方程的注意点，例解DEE23解延迟方程失效的地方，提出新解决方案(MATLAB to solve the delay equation of the attention, the cases of solutions of delay equations DEE23 solutions where failure to introduce new solutions)

计算机仿真程序例子，包含多个基本程序，可帮助我们更好的学习matlab(examples of computer simulation program, includes a number of basic procedures that will help us to better learning Matlab)

matlab中的siso设计工具，讲的比较细致！(siso design tools in matlab speak carefully!)

电压源逆变器加LCL滤波器挂网，SVPWM控制，适用于matlab7.3版本(Chang Tai揤column ? floor LCL Cao Jian Shu She ? Habitat SVPWM ㄛ ㄛ秶satirical巠using quilt hanging matlab7.3唳)

本论文主要说明数字中频GPS信号的MATLAB仿真，有较详细的仿真图(This thesis describes the MATLAB simulation of the digital IF GPS signals, a more detailed simulation in Figure)