qpskd

这是一个方便的计算FFT的程序带坐标的fft变换(It s a program for fftrl,)

瑞利信道下(2,1,3)卷积码仿真，得到误码率曲线。(Rayleigh Channel (2,1,3) Convolutional Codes simulation results, BER curves.)

MATLAB环境下多车道信号交叉口元胞自动机仿真 可以实现信号相位的仿真 可以计算交叉口各相位 各车道车辆延误(Microscopic simulation of signalised junctions based on Cellular Automata. For each signal phase. The code could run simulation separatly and produce travel delay by changing traffic volume.)

说明：  KPCA实现数据降维，数据部分可以自己改，用的是TE故障中的一组数据(KPCA realizes data dimension reduction, and the data part can be changed by itself. It USES a set of data in TE fault)

说明：  分支定界法（branch and bound）是一种求解整数规划问题的最常用算法。这种方法不但可以求解纯整数规划，还可以求解混合整数规划问题。分支定界法是一种搜索与迭代的方法，选择不同的分支变量和子问题进行分支。 对于两个变量的整数规划问题，使用网格的方法有时更为简单。 [1] 通常，把全部可行解空间反复地分割为越来越小的子集，称为分支；并且对每个子集内的解集计算一个目标下界（对于最小值问题），这称为定界。在每次分枝后，凡是界限超出已知可行解集目标值的那些子集不再进一步分枝，这样，许多子集可不予考虑，这称剪枝。这就是分枝定界法的主要思路。(Branch and bound method is one of the most commonly used algorithms to solve integer programming problems. This method can solve not only pure integer programming but also mixed integer programming. Branch and bound algorithm is a method of search and iteration, which selects branches with different branch variables and sub problems. For integer programming problems with two variables, the grid method is sometimes simpler[ 1] Generally, all feasible solution spaces are divided into smaller and smaller subsets repeatedly, which is called bifurcation; And a lower bound of the objective (for the minimum value problem) is calculated for the solution set in each subset, which is called the bound. After each branch, those subsets whose bounds exceed the objective value of the known feasible solution set will not be further branched, so many subsets can not be considered, which is called pruning. This is the main idea of branch and bound method.)

关于向图像中嵌入二值图像作为水印，用的是交换中频系数的方法。(DCT watermarking)

清华模式识别张学工，第一次作业，基于身高体重数据进行性别分类(Pattern recognition, based on height and weight data for gender classification)

基于希尔伯特黄变换的抖动分析的有用EMD分析工具(Hilbert-Huang Transform Based on the analysis of jitter analysis tools useful for EMD)

(15,11)BCH编码和译码c语言程序，直接解压就可以了((15.11) BCH encoding and decoding c language program, it can directly extract the)

matlab线性拟合及指数拟合的源程序，并不是利用plotfit函数。(matlab linear fit and exponential fit of the source, not using plotfit function.)