三种熵

DPLL implementation in matlab

说明：   使用二分法对样本集进行剪辑，剪辑法的思想，就是将样本集分成训练集与考试集， 利用训练集样本对考试集的样本进行分类（使用近邻法），如果考试集中某个样本分类错误的话，将这个样本删除。在该函数中，使用最近邻法，只进行一次剪辑（遍历完考试集中的样本以后退出）。还有一种重复剪辑法（适用于样本比较多的情况），把样本随机分为多个样本集，将相邻的两个样本前一个作为考试集，后一个作为训练集，调用二分剪辑。所有的样本子集剪辑完毕以后，在递归调用，直到没有样本被剪辑掉,没得讲，重复剪辑的效果肯定好一些。 (The sample sets using the dichotomy of the clips, editing law idea is to sample set into training set and test set, using the training set samples to the test set of samples (using the nearest neighbor algorithm), if the examination focused on a sample of classification error then delete this sample. In the function, use the nearest neighbor method, only once clips (focused on a sample of traversal finished after the exit exam). There is also a repeat clip method (samples are more applicable to the case), the samples were randomly divided into multiple sample set, the two adjacent samples of the former one as a test set, the latter one as a training set, call the two sub-clips. All the samples were a subset of the clips after they have finished, in the recursive call, until there are no samples were clip out, did not have to say that the effect of repeated clips definitely better.)

基于matlab的gps仿真，包括理论原理、仿真方法、仿真结果及其分析等(Based matlab gps Simulation, including the theoretical principles of simulation methods, simulation results analysis)

能量熵的计算，包含特征值与特征向量的提取、训练样本以及最后的识别，含噪脉冲信号进行相关检测,有循环检测，周期性检测，IDW距离反比加权方法，在matlab环境中自动识别连通区域的大小。( Energy entropy calculation, Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, Noisy pulse correlation detection signal, There are cycle detection, periodic testing, IDW inverse distance weighting method, Automatic identification in the matlab environment the size of the connected area.)

nakagami PPB filter for denoising

灰色预测GM（1，1）模型的matlab源代码，包括预测模型的建立，以及模型的精度检验指标c,p的计算(Gray prediction GM (1,1) model matlab source code, including the prediction model, as well as indicators of model accuracy test c, p calculation)

Contains watermark embedding

this document speaks about optcal fiber transmission

经PPM调制的超宽带信号经高斯白噪声信道的系统仿真,给出了时域和频域图(Modulated by the PPM UWB signal by Gaussian white noise channel of system simulation, given the time and frequency domain map)

该方法是利用RSSI算法进行节点之间定位的一种方法。(This method is the use of RSSI between node positioning algorithm in a way.)