proj_final

时频工具箱 matlab 时频分析(Frequency analysis in the time-frequency toolbox matlab)

linear elastic Fem analysis in materials

实现维纳滤波用于语音增强。第一步采用频域谱函数计算最佳的维纳滤波器，再对输入带噪信号进行滤波；第二步是在此基础上的改进，用了自适应的思想，及时根据当前帧的状态更新修正滤波器的系统函数，得到更精确的无噪语音信号。第三步是采用自适应LMS方法，在时域迭代计算滤波器系数，迭代次数足够多时可得到较准确的有用信号。(Implement wiener filtering used in speech enhancement. First step optimum wiener filter is obtained by using the frequency spectrum function, again to input the signal with noise filtering The second step is the improvement on the basis of this, with the idea of adaptive, and in a timely manner according to the current frame updates correction system function of the filter, get a more accurate without noise speech signal. The third step is to use the adaptive LMS method, iterative calculation in time domain filter coefficient, the number of iterations enough to get the useful signal accurately.)

说明：  二维无网格EFG计算程序，由MLS方法生成新函数(Two-dimensional meshless EFG computer program to generate a new function by the MLS method)

梯度下降法是一个最优化算法，常用于机器学习和人工智能当中用来递归性地逼近最小偏差模型(The gradient descent method is an optimization algorithm used in machine learning and artificial intelligence to recursive approximation of the minimum deviation model )

说明：  this code is used to solve non linear equation using newtons method.

用wolf法计算最大lyapunov指数(The maximum lyapunov index calculation method by wolf)

通过主成分分析和偏最小二乘分析，然后画出数据的PCA主轴和PLS主轴(Principal component analysis and partial least squares analysis, and then draw the PCA and PLS spindle axis data)

Kalman filter examples

说明：  该MATLAB程序计算长周期光纤光栅纤芯模式的有效折射率(MATLAB program calculated the long-period fiber grating core mode effective refractive index)