guidao

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)

Attractor Reconstruction With Matlab

说明：  《现代信号处理教程》配套源程序，包含了许多信号处理的函数M文件("modern signal processing Guide" complementary source, including many signal processing function M paper)

simulation decoupling system

基于阵列信号处理的空间多目标跟踪，很有用。(Space based on array signal processing, multi-target tracking, and useful.)

matlab基础与应用教程例题第三章代码(code for matlab)

104规约程序，用于电力IEC104规约分析(104PROTOCAL)

source code pso fractical

simulink光伏并网逆变器仿真，模拟不同类型光伏电池，算出逆变器参数(simulink photovoltaic grid-connected inverter simulation, simulate different types of photovoltaic cells to calculate the parameters of the inverter)

visual cryptography & hash funcction for data and image files