make_SNR

低通滤波器，对数据进行平滑，也叫做最小二乘法，Savitzky-Golay算法(a particular type of low-pass filter, well-adapted for data smoothing, and termed variously Savitzky-Golay, least-squares, or DISPO (Digital Smoothing Polynomial) filters. Rather than having their properties defined in the Fourier domain and then translated to the time domain, Savitzky-Golay filters derive directly from a particular formulation of the data smoothing problem in the time domain)

1 录入一段语音，对其进行时域频域处理，通过变频、变速达到变声目的，且使处理后的语音信号不影响正常收听与理解。 2 用图形用户界面（GUI）对上述变声前变声后进行时域频域图形输出，不同的频率、速度有不同的输出，且对前后波形进行比较 (1 entry a voice, the frequency domain and time domain by frequency conversion variable speed, processing to make the treatment and voice purpose, after the speech signal shall not affect the normal to listen to and understand. 2 with the graphical user interface (GUI) voice of the above voice before after the frequency domain in the time domain graphics output, different frequency, speed have different output, and compared before and after waveform )

模糊控制规则设计，仿真结果证明控制精度高(Design of fuzzy control rules, the simulation results show the high control accuracy)

Sparse in Time Program Compressive Sensing

matlab支持向量机回规界面，操作简单，使用方便(Matlab Support Vector Machine to back regulatory interface, simple operation, easy to use)

用振型分解法求解框架结构的地震反应，地震波为EI Centro波(Using modal decomposition method to solve the seismic response of frame structure, seismic waves for EI Centro wave)

数字信号频域处理的matlab源程序，包括dct，butterworth，lowpass等(Frequency-domain digital signal processing matlab source, including dct, butterworth, lowpass, etc.)

说明：  任意三角形上的任意阶Gauss积分程序 算法详见参考文献 H.T. Rathod, K.V. Nagaraja, B. Venkatesudu, N.L. Ramesh, Gauss Legendre quadrature over a triangle, J. Ind. Inst. Sci. 84 (2004) 183–188.(Gauss Legendre quadrature over any triangle)

code for discrete cosine transform

cat map function to scramble a one dimentson sequence