f12_4

matlab教程，详细介绍Matlab的基础、入门及使用指南。()

Selective Repeat ARQ / Selective Reject ARQ is a specific instance of the Automatic Repeat-Request (ARQ) protocol used for communications.

简单的404错误页面，用途网站优化，可以增加您的网站权重。(Simple 404 error page, use Website Optimizer, you can increase your website weights.)

说明：  Wireless Sensor Networks WSNs Modified LEACH

该文件有助于初学习matlab者建立信号的概念(The document will help to establish early learning matlab signal concept)

电力系统行业配网37节点feeder34，用于配电网规划(Feeder34 power systems industry with a network of 37 nodes for distribution network planning)

采用 Welch法在matlab中进行功率谱密度计算(Welch method using power spectral density calculation in matlab)

经典的瑞利衰落信道仿真模型-jakes模型。程序可以修改不同的入射路径个数。仿真结果是不同入射路径个数的jakes模型和同分布的瑞利衰落的包络分布对比。直接运行“tu.m”(The classic Rayleigh fading channel simulation model-jakes model. Program can modify the number of incident path. The simulation results compare jakes model of different incident paths with distribution of Rayleigh fading.)

基于matlab的几种语音信号端点检测方法(Several based on matlab voice signal endpoint detection method)

说明：  边缘预测提出了一种基于预测的、有一定自适应性的边缘检测方法。介绍了其原理和算法实现过程。通过计算两个相邻像素的灰度值的均值、均方差和梯度来预测下一个像素的灰度值,比较预测值和真实值来判断下一个像素是否是边界点。通过与现有同类算法的比较,证明了该算法的优越性(A predictive and adaptive edge detection method is proposed. The principle and implementation process of the algorithm are introduced. The gray value of the next pixel is predicted by calculating the mean, mean square deviation and gradient of the gray value of the two adjacent pixels. The prediction value and the real value are compared to determine whether the next pixel is a boundary point. The superiority of this algorithm is proved by comparing with the existing similar algorithms.)