EnergyDetection

基于MATLAB的DTMF拨号演示文件，可帮助理解DTMF的基本原理。(DTMF Presentations may help understand the basic tenets of DTMF.)

将Quaternion四元素坐标系转换为一般的欧拉角坐标系，避免采用反三角函数导致的值域限制问题。参数xi为搜索的精度，对于每个欧拉角可以分别设定，xi越小，搜索越精确。(Quaternion quaternion coordinate system will be converted to general Euler angle coordinate system, avoiding the use of inverse trigonometric functions due to range limitations. The accuracy of the search parameter xi, for each Euler angle can be set separately, xi smaller, more accurate search.)

作者详细给出了四轴飞行器建模的仿真实验过程，适合飞行爱好者阅读(The author gives a detailed simulation modeling process Four aircraft for flight enthusiasts reading)

说明：  图论flord算法、哈密顿通路算法、kruskal算法、最大流算法、prim算法、旅行商算法及路由算法等等，都是由Matlab编写的图论算法程序。(Many graphic alogrithms are collected here. They includes flord, hamiltonian path, kruskal, max flow, prim, traveling salesman problem, and routing algorithms. All this are developed with Matlab.)

extract zero cross rate features from an audio signal

EKF，非线性滤波方法，EKF可以得到更好的重要性密度函数，能够更好的得到效果。(EKF, nonlinear filtering method, EKF can get better the importance density function, can get better results.)

conventional CRC coder for LTE-A

该文件是学习matlab的经典教材，国内无法找到，本人从国外所得。(this book is the classical textbook for matlab.it is easy to learn and grasp by matlab engineers.)

改进的渐进拓扑优化方法，以应力为设计目标(The improved progressive topology optimization method takes the stress as the design goal)

it is related to mat lab