RBF_per

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)

COA Toolbox for matlab

在matlab中实现CDMA信号的位同步，可实现，效果较好。(Implemented in matlab CDMA signal bit synchronization can be achieved, the better.)

Outputs the inputted numbers in increasing order

Testing complicated str.replace.

这是我自己写的亲测可用的matlab 牛顿迭代法函数程序(This is the Newton iteration program based on MATLAB written by myself)

说明：  电网优化，能够用于分布式电源的选址定容，也可以用于电网的网架优化计算等等(Power network optimization)

用于解反问题的算法，对于Ax=b，输入矩阵A，列向量b，以及迭代步数k，可求的列向量x(The algorithm for solution of the inverse problem, for Ax = b, the input matrix A, the column vector b, as well as the number of iterations k, rectifiable column vector x)

matlab课件，希望能对急需它的朋友起到帮助(matlab courseware, it is hoped that friends of much-needed help)

时滞微分方程组的原方程，以及相图程序，包括matlab源代码(Delay differential equations of the original equation, and the phase diagram of the program, including Matlab source code)