harmonic_FFT

中心显示格式求解poisson方程与精确解在绝对值型误差下的误差值，矩形区域，狄利克雷边界情况！(Center display format and exact solutions for solving the poisson equation error in the absolute value of the type of error values, rectangular area, Dirichlet boundary conditions!)

说明：  图像分割是一种重要的和关键的图像分析技术，其目的是把图像分成各具特性的区域并提取出感兴趣的部分，图像分割的结果是图像特征提取和识别等图像理解的基础。对它的研究一直是图像技术研究中的热点和焦点，提出了数以千计的不同算法，虽然这些算法大都在不同程度上取得了一定的成功，但是图像分割问题还远远没有解决，这方面的研究仍然面临很多挑战。(Image segmentation is an important and critical image analysis, the purpose is to image into regions with different characteristics and extract the interesting part, the result of image segmentation is the image feature extraction and recognition based on image understanding. Study it has been a hot spot imaging technology research and focus, made thousands of different algorithms, although most of these methods to varying degrees, achieved some success, but the image segmentation problem is far from resolved, it of research still faces many challenges.)

说明：  求光斑中心点坐标,对图像二值化。并且对其中心坐标求出(mean)

拟牛顿法编写无约束优化程序,主要用于电力系统务工优化。(quasi-Newton method to prepare unconstrained optimization procedures, mainly for the power system optimization workers.)

全数字调制解调器MATLAB仿真真源代码，超级实用，下载即可使用。 (All-digital modem MATLAB simulation is really the source code, super-practical, can be used to download.)

simulink模块实现的DMC仿真程序(simulink realization of the DMC simulation program module)

examples contain source codes about PID control

这个程序就是最基本的粒子群优化算法程序，用Matlab实现，非常简单。只有几十行代码。(Algorithm for this process is the most basic particle swarm optimization procedures, using Matlab implementation is very simple. Only a few dozen lines of code.)

The first scheme is based on the spatial locality of feature vectors corresponding to similar images. Learning is effected by modifying the query vector to incorporate the positive examples. The second scheme is based on “distorting” our view of the feature space. An new similarity distance between an image and the query is learned from the relevance feedback.

PPM调制的超宽带系统RAKE接收机的误码率仿真程序(BER simulation of PPM_UWB system)