denoise+compression

In numerical analysis, the secant method is a root-finding algorithm that uses a succession of roots of secant lines to better approximate a root of a function f.(The secant iteration to find the zero of some non-linear function converges to zero if appropriate starting values are chosen. Although the convergence rate is not as good as the one of the Newton method, it may sometimes converge when Newton fails. The funtion should be defined as an inline function and two starting values are required to start the iteration. Please enter help secant from the Matlab prompt for usage information and examples. )

对原始信号进行四相相移键控调制，然后加入高斯白噪声，对加噪信号进行解调，对比解调信号与原始信号，计算误码率(The original signal quadrature phase shift keying modulation, and then adding Gaussian white noise, plus noise signal is demodulated, comparing the demodulated signal with the original signal, bit error rate calculation)

数据类型转换,int转换成uint8，比较适用(data change)

说明：  bp神经网络的matlab程序,语句非常精练,运算时间短(bp neural network matlab procedures, very concise statement, computing time is short)

说明：  用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱(Simulink tools with the code (S-Function mode), resulting in a single-path Rayleigh Road, the Doppler spectrum for the classical spectrum)

统计分析 数据分析中关于回归分析的源代码，非常的全面！(The statistical analysis of source code, data analysis, regression analysis is very comprehensive! )

图创建一个放大框，当一个按钮被按下时，根据鼠标的位置。按“+”/“ - ”，而按下按钮来增加/减少放大。按 > / < ，而按下按钮来增加/减少箱尺寸。 按住Ctrl键的同时单击离开放大图。(Figure creates a magnification box when under the mouse position when a button is pressed. Press + / - while button pressed to increase/decrease magnification. Press > / < while button pressed to increase/decrease box size. Hold Ctrl while clicking to leave magnification on figure.)

S-function程序编写实例,本人学习MATLAB中系统函数第一个编写的程序。运行环境：MATLAB。直接运行即可。(the programming example of S-function.)

DFA和MFDFA算法的实现，内有算法步骤说明，实现生物信号的处理，算法正确，结果很好。(DFA and MFDFA algorithm to achieve, there are steps describe the algorithm to achieve the biological signal processing algorithm is correct, the result is very good.)

课程设计，实现简单的计算器功能，希望多多交流(Curriculum design, simple calculator function, I hope more exchanges)