euler

批处理选择年代不同的数据 如1951年开始到2010年的数据，统一选择为1971-2010年，该程序可以实现(Batch select from different data such as the 1951 to 2010 data, unified Select year 1971-2010, the program can be achieved)

我写的改进中心点的混合高斯分布的EM算法(I wrote to improve the center of the EM algorithm for Gaussian mixture)

根据功率谱的原始定义编制的功率谱分析程序，相比于周期图、welch法等更简洁，但分辨率不高。(spectrum analysis based on self-correlation)

偏微分数值解法中求解正方形区域中的Laplace方程Dirichlet问题 程序(The solution of numerical solution of partial differential square area of the Laplace equation Dirichlet problem Program)

用变形核密度模型对数据的统计分布进行估计，常用于金融信用分析、财产保险精算等领域，是一个很有效、常用的非参数模型(Deformation of the nuclear density model of the statistical distribution of the data to estimate the financial credit analysis, property insurance and actuarial fields, is a very effective and commonly used non-parametric model)

图像频域滤波，用matlab实现了在图像频域中通过Butterworth陷波器消除周期性噪声干扰信号。(Image frequency domain filtering using matlab achieved in the frequency domain image by Butterworth notch filter to eliminate periodic noise signal.)

说明：  对数据进行多小波分解比传统的经验模态分解效果更好(The multi wavelet decomposition is better than the traditional empirical mode decomposition)

对所给数据进行滤波，得到更具规律性的数据曲线(For the given data filtering, to obtain a more regular data curve)

利用matlab，对线卷积、圆卷积、overlap_add、overlap_save四种方式的时间效率进行对比，输出所用时间。 简单浅显易懂，适合初学者(Use matlab, on line convolution, convolution round, overlap_add, overlap_save time-efficient four-way comparison, the output of the time spent. Simple and easy to understand for beginners)

说明：  用matlab编写的最小二乘算法。用matlab编写的最小二乘算法。(Matlab least squares algorithm)