attachments_2012_01_16

m-fsk modulation and de modulation

说明：  五点三次平滑法可用作时域和频域信号平滑处理。对时域作用是减少混入振动信号中的高频随机噪声。对频域是能使谱曲线光滑。(Three five-point smoothing method can be used as time domain and frequency domain signal smoothing. Effect on the time domain vibration signals to reduce high-frequency mixed with random noise. On the frequency domain is the spectral curve can smooth.)

基于频带方差的语音端点检测，很有用的，大家自己好好看，不是太难(variance based on the frequency of speech endpoint detection, very useful, we all do well, not too difficult)

说明：  为ifft后的时域数据加cp的MATLAB程序。(After the time-domain data ifft added cp' s MATLAB.)

声子晶体的源程序：圆柱形散射体呈正三角排列的Ｚ模程序(Phononic crystal source: cylindrical scattering takes the shape of the Z mode is triangular arrangement of the program)

说明：  用于DC-DC转换器的涂层电路以提高电压转换率(Coat Circuits for DC-DC Converters to Improve Voltage Conversion Ratio)

对心电信号进行处理，R波定位，特征点提取(ECG signal processing, R wave positioning, feature point extraction)

利用最小二乘法进行拟合多元非线性方程，最小二乘回归分析算法，计算目标和海洋回波的功率谱密度。( Multivariate least squares fitting method of nonlinear equations, Least-squares regression analysis algorithm, Calculating a target and ocean echo power spectral density.)

PCA主元分析后用神经网络预测，A/S含量，PCA算法实现，与神经网络(PCA principal component analysis using neural network prediction, A/S content, PCA algorithm, and neural network)

基于MATLAB的杨氏双缝干涉实验仿真电子资料，内含程序源代码，对干涉条纹仿真研究具有很高的参考价值(MATLAB-based Youngs double-slit interference experiment simulation of electronic data, containing source code for simulation of interference fringes of high reference value for)