_auto_contrast_

说明：  根据语音信号的特点给出有关滤波器的性能指标：1）低通滤波器性能指标，fp=1000Hz，fc=1200 Hz， As=100dB，Ap=1dB；2）高通滤波器性能指标，fc=2800 Hz，fp=3000 Hz As=100dB，Ap=1dB；3）带通滤波器性能指标，fp1=1200 Hz，fp2=3000 Hz，fc1=1000 Hz，fc2=3200 Hz，As=100dB，Ap=1dB。用IIR对其分析，最后，利用MATLAB中的函数freqz画出各滤波器的频率响应。(This article according to the IIR filter and the FIR filter characteristic, uses the bilinearity method of transformation under the MATLAB bad boundary to design IIR and to design the FIR numeral filter separately with the window box number, and carries on the analysis to the gathering pronunciation signal, and finally gives IIR and FIR to the pronunciation filter effect.)

基于MATLAB的手机按键音识别系统设计的源代码，并利用GUI界面实现可视化操作功能(MATLAB-based mobile phone key tone recognition system design source code, and use the GUI interface to visualize operational functions)

MAP detection under Rician fading

自适应波束行成——最小二乘法，根据得到的波束图判断到达波的方向(Adaptive beam-line- on the least square method, according to the obtained beam pattern to determine the direction of wave)

this is very useful file that simulate the memory polynomial method.

人工蜂群算法的源程序，优化效果好，运行时间短。(Artificial colony algorithm source code, optimize the effect is good, operation time is short. )

超声波声场模拟，可自行设定频率、发射波形、带宽等等，设定换能器矩阵(Ultrasonic sound field simulation, can set the frequency of the transmitted waveform, bandwidth, etc., setting the transducer array)

现代控制理论经典书籍，不得不看呀，最近发现还是以前的书写的好(Modern control theory classic book, had behold, recently discovered or writing a good previous)

总体经验模态分解的程序,总体经验模态分解的程序(Overall empirical mode decomposition process, the overall empirical mode decomposition procedure)

least square SVM toolbox