phase_screen_128

Matlab计算信噪比,单声道，双声道均可，公式准确程序清晰(Matlab calculation of signal to noise ratio, mono, dual-channel may be, the formula clear and accurate procedures)

this program tries to find optimum point

本程序实现QPSK信号，通过瑞利信道后的各部分星座图(The program QPSK signal, Rayleigh channel through each part of the constellation after)

surface acoustic wave device (temp and freq shift)

programming of and gate

说明：  可以很好的对图像数据进行前处理，对后出数据优化设计(Can be a good pre-processing the image data, after the data on the optimal design)

在自适应控制中，用Matlab算法实现递推最小二乘参数估计(In adaptive control, recursive least squares algorithm using Matlab parameter estimation)

说明：  运用主成分分析法和K均值聚类法来进行SAR影像变化检测(SAR image change detection using principal component analysis and K-means clustering)

保证可用的，希望好评！！！HOG+SVM进行图片中行人检测，提供训练用的pos和neg样本，效果还可以（也是本网站下载代码，但是原始的作者故意改错一些地方，我已经一一修正，完全可以运行；没有SVM工具箱的，压缩包里已经提供了，安装一下即可） (HOG+SVM pedestrian detection)

BP神经网络容易陷于局部极小值，PSO算法在无约束非线性函数优化方面性能优越，通常可以直接找寻到全局最优解，即使不能搜多到全局最优解，也距离全局最优点不远。当然，基本PSO算法陷入局部极值也是有的。对于这个缺点目前还没有找到比较有效、省市的解决方案。本案例实现利用PSO算法和BP算法共同训练神经网络，先将网络进行PSO算法训练，然后BP算法接着进行小范围精细搜索，PSO算法训练神经网络的本质就是将输出误差函数（即能量函数）看成目标函数，PSO对能量函数进行全局寻找最小值。(BP neural networks are prone to local minimum values. The PS algorithm has superior performance in the optimization of unconstrained nonlinear functions. It can usually find the global optimal solution directly. Even if it can not find more global optimal solutions, it is not far from the global best. Of course, there is also a local extreme of the basic PO algorithm. For this shortcoming, there is no more effective, provincial and municipal solution. This case realizes the use of the SO algorithm and the BP algorithm to train the neural network. First, the network is trained in the SO algorithm, and then the BP algorithm is followed by a small range of fine searches. The essence of the PO algorithm training neural network is to regard the output error function(ie, the energy function) as the objective function, and the PO seeks a global minimum value for the energy function.)