watermark

程序给出了0~10发音的语谱图，其中采用分帧函数对信号进行分帧处理然后在用fft算法得到频谱信息，后用灰度图像表示(Program gives the pronunciation of words from 0 to 10 spectra, which employs the signal sub-frame function and then in the sub-frame processing spectral information obtained with the fft algorithm, then said with a gray image)

学习MATLAB (学习MATLAB的好帮手)(Study MATLAB (MATLAB is a good helper to learn))

直接序列扩频仿真实例，产生m序列，然后进行扩频通信，对初学者很有用啊(Direct Sequence Spread Spectrum simulation example, useful for beginners )

说明：  为考查各种不确定性因素对系统运行的影响，需要大量地重复性潮流计算。结合概率理论形成的概率潮流计算能够充分考虑这些不确定性因素。由概率潮流计算可以得到节点电压、电流、支路潮流的均值、方差、概率密度函数等统计特性，从而更全面地反映系统运行状况。(In order to examine the impact of various uncertainties on system operation, a large number of repetitive power flow calculations are needed. The probabilistic power flow calculation based on probability theory can fully consider these uncertainties. Statistical characteristics of node voltage, current and branch power flow, such as mean, variance and probability density function, can be obtained from the calculation of probabilistic power flow, thus reflecting the operation status of the system more comprehensively.)

随机减振法处理振动数据，之后可以使用ARMA和复指数法处理得到自振频率(Random vibration damping treatment data, then you can use the ARMA and complex exponential treatment was natural frequency)

有详细的注释，可以得到很精确的幅值、频率、相位估计，基于互功率谱的时延估计。( There are detailed notes, You can get a very accurate amplitude, frequency, phase estimation, Based on the time delay estimation of power spectrum.)

使用DSP和MATLAB设计的一个低通FIR滤波器，基本上实现了滤波的效果(use and MATLAB DSP design a FIR low-pass filter, basically realize the filtering effect)

流行学习方法局部保持投影（LPP）算法MATLAB代码(Popular learning methods locality preserving projections (LPP) algorithm MATLAB code)

Determine the SNR for a quadrature delta-sigma modulator using simulations. The modulator is described by a noise transfer function (ntf) and the number of quantizer levels (nlev). The ntf/stf may be given in ABCD form. The band of interest is defined by the oversampling ratio (R) and the center frequency (f0).

this code make random sea wave and analysis their parameter