gbvs

说明：  利用matlab进行几何畸变。给定一幅图像，固定其坐标，然后，进行畸变。(using Matlab for geometric distortion. To set an image, fixed his coordinates, and then for distortion.)

数学建模中的一种评价算法--基于topsis熵权评价法和改进的灰色预测模型代码，里面的内容根据自己的情况改。(An evaluation algorithm in mathematical modeling is based on the TOPSIS entropy weight evaluation method and improved grey prediction model code, and the contents are changed according to their own situation.)

This is Simple PSO Implementation

提供了SAD算法和根据相关性检测算法，把图像分成四个块，根据每个块的相关性检测目标。(provided under the relevant algorithms and detection algorithm, the image is divided into four blocks, each block of target detection.)

awgn model channel programme matlab

说明：  一个数如果恰好等于它的因子之和，这个数就称为“完数”，编写程序找出2～5000中的所有完数。(If a number is just equal to the sum of its factors, this number is called &quot complete number&quot , written procedures to identify 2 to 5000 in the number of all finished.)

实现2ASK、2FSK、2PSK的调制与解调功能(2ASK, 2FSK, 2PSK modulation and demodulation functions)

变尺度法的源程序，用于优化中的非线性规划，效还可以的。(variable scale method of the source for the optimization of nonlinear programming, the effect can be.)

在信号处理中，信号发射时，信号通过载波，调制，以电磁波的形式发射出来 在接收端，射频信号通过天线接收，超外差式等方式进行处理，变频到中频 然后通过数字技术对中频信号进行处理，此时的中频信号采样率很高，多达几十兆赫 而要解调出来的信号很小，此时就要经过滤波来得到我们需要的信号 如果直接设计滤波器，阶数会非常庞大，软件，硬件设备都承受不了 因此，一般常用的技术是进行下变频处理，其主要技术就是通过抽取滤波进行下变频 常用的滤波器就是CIC抽取, 希望可以帮助一些坛友解决基本的问题。 (In signal processing, signal emission, signal through the carrier, in the form of electromagnetic wave modulation, launched In the receiver, rf signals through the antenna, specialized superheterodyne type means such as processing, the frequency conversion to intermediate frequency Then through digital technology of intermediate frequency signal processing, at this time of intermediate frequency signal sampling rate is very high, as many as several decades MHZ But the signal demodulation out is very small, at this time would be passing filter to get what we need signal If design directly filter, order number be colossal, software, hardware equipment all suffer Therefore, the technology is usually used for down-transducer processing, its main technical is by extracting filtering down-transducer Commonly used filter is CIC extraction, the hope can help some friends solve basic problems of the altar.)

不同的窗函数，都对应不同的幅值修正系数；针对复制修正中最重要的平顶窗，给出修正的方法。(Different window functions, corresponding to the amplitude correction factor copy the most important amendment of the flat-top windows, give a correction method.)