Bag-of-visual-words

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)

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用matlab实现人脸检测，在实验数据库情况下证明效果良好(acheviing face detection with matlab,it is aproved good in the fae data.)

matlab常用函数大全，方便速查matlab各种函数(matlab commonly used functions Daquan, to facilitate a variety of functions matlab Quick Fact)

利用旋转不变方法对信号的波达方向进行估计，主要用于窄带信号(DOA estimation by ESPRIT)

数字仿真技术中一种检验独立性方法的仿真-游程检验(you cheng jian yan )

PSS primary synchronization signal in the time domain simulation related, Wavelet packet analysis to extract vibration signal characteristic frequency, Computation Method D phononic bandgap plane wave.

对二维图像进行离散傅里叶变换，分别给出了直流分量移动到频谱中心前后的频谱图样。(Two-dimensional images of the discrete Fourier transform, respectively, given the spectrum to move to the DC component of the spectrum before and after the design center.)

一篇很好的介绍11n物理层技术的文章，建议做相关工作的可以看看(ieee_circuits_systems wireless LAN Comes of Age Understanding the IEEE 802.11n Amendment)

基于fht的匹配追踪算法，算法速度要比fft快很多，提高了一个数量级(Fht based matching pursuit algorithm, the algorithm much faster speed than fft, an order of magnitude increase)