powell-method

基于matlab，利用香浓能量对心音信号进行包络提取(Based on matlab, using Shannon energy of the heart sound signal envelope extraction)

this source code is very good

说明：  QPSK调制的Matlab程序。包含了QPSK调制及误码率分析。可以调制一随机产生的序列来分析误码率，也可以调制一幅图像来分析误码率。(QPSK modulation of the Matlab program. Contains a QPSK modulation and BER analysis. Can be modulated to a randomly generated sequence analysis of BER, an image can also be prepared to analyze the error rate.)

在matlab7.8版本上编译通过。 利用matlab的滤波器工具箱函数实现对直扩扩频通信过程的仿真模型，可以简单设定功率控制，多径传输，多值干扰等过程。(This program is compiled successfully in Matlab7.8 platform. With the matlab Filter Toolbox funtion to simulate the process of spread spectrum transmission. The simple option such as power control,multiprocess and multiaddress nterference can be set in this program。)

non retour to zero line code

matlab平台下的测试函数Rosenbrock，对于用来测试粒子群、遗传等智能算法的性能非常有用(matlab platform test function Rosenbrock, used to test for the PSO, the performance of genetic algorithms and other useful intelligence)

（8,1）重复码的软、硬判决译码的仿真程序。( (8,1) repeat code, hard and soft decision decoding simulation program.)

A律13折线编码 PCM编码信号通过加性高斯加白噪声信号(A law encoded PCM encoded signal 13 fold by adding white noise signal is high, Alaska)

将一副彩色图像转为灰度图像，截取部分，并找到质心位置(Centroid calculation of gray image)

说明：  谱估计的MUSIC算法，里面有详细的介绍，对做谱估计的同学应该有帮助。(The MUSIC spectral estimation algorithm, there are detailed introduction to the spectral estimation of the students do should be helpful.)