LSR

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)

流水线模数转换电路输出信号做fft后求SNR,SNDR的matlab程序(matlab fft program for SNR and SNDR of pipelined analog to digital converter（ADC）)

说明：  语音增强算法,语音的小波变换算法源程序，欢迎使用啊，很不错(Speech enhancement algorithm, the wavelet transform algorithm for speech source, please use the ah, very good)

tigth subplot in figures

一个关于降压BUCK电路的模型建立，很好很强大(BUCK a buck on the modeling circuit, a very powerful)

该程序完成Matlab对音频信号的带通处理，可以将带通前后的频谱图相对比，和播放音乐变化。(The program completed Matlab band-pass processing of the audio signal, may be band-pass around the spectrum diagram relative ratio, and playback music changes.)

说明：  MATLAB的基础模糊c-均值算法，可以直接运行(fuzzy clusting)

非线性偏微分方程用不同差分格式求解两种TVD格式(nonlinear partial differential equations were different format for two TVD)

this is kodeing for poster

Lecture on Week number 4