adapt_filter

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)

灰色系统预测模型，能够通过少量数据预测将来变化趋势。(Grey system prediction model can predict the future by a small amount of data trends.)

為matlab的影像增強程式，屬於小專題，可以參考看看(This is a program matlab image enhancement)

PID+genetic algoritm

This is source code concerning with chapter 4 of DIP book

1) 编制通用的二值形态学运算（腐蚀和膨胀、开、闭和击中击不中变换）函数。 2) 函数可以处理不同的变换形式和不同类型的结构元素。 (simple functions of imopen imclose .etc)

This is a optical character recogniser made in matlab. it is simple and it works great

INTERNAL FACULT CLASSIFICATION OF TRANSFORMER WINDING ..WITH BASEPAPER AND CODING ....ENJOY IT

里面包含多种综合评价方法，如层次分析法、模糊综合评判、基于可拓学的综合评价方法、数据包络分析法、TOPSIS分析法、熵权法以及人工神经网络分析法(It contains many comprehensive evaluation methods, such as analytic hierarchy process, fuzzy comprehensive evaluation, extension-based comprehensive evaluation method, data envelopment analysis method, TOPSIS analysis method, entropy weight method and artificial neural network analysis method.)

自发辐射、受激辐射和受激吸收,激光二极管抽运的被动调Q Nd3+:YAG微晶片激光器仿真(Spontaneous emission, stimulated emission and stimulated absorption of laser diode pumped passively Q Nd3+: YAG microchip laser simulation)