Factor_Models

基于改进的GrowCut算法实现图像分割的代码，实现的平台是Windows下的Matlab。(The code image segmentation based on improved GrowCut algorithm implementation under Windows platform is Matlab.)

theori jame of mashin elec in matlab mfile

kpss test matlab- useful econometric tool

针对风电场短期风速的预测提出一种基于小波变换的组合预测方法。首先利用Mallat 算法对短期风速时间序列进行db3 小波三层分解与重构，得到短期风速时间序列的近似分量和细节分量。针对近似分量和细节分量的不同特性，对近似分量利用粒子群算法优化的最小二乘支持向量机进行预测，对细节分量利用自回归求和滑动平均模型进行预测。最后各预测模型预测值组合叠加得到最终的短期风速预测值。仿真结果表明该方法具有较高的预测准确度。(In order to improve short-term wind speed prediction accuracy of wind farms，a combined prediction method based on the wavelet transform is proposed. Firstly，the db3 wavelet is used for three-layer decomposition and reconstruction for short-term wind speed time series through Mallat algorithm. The approximation components and the detail components of the short-term wind speed are then obtained. Next，according to the different characteristics of these components，the least square support vector machine optimized by particle swarm algorithm and the autoregressive integrated moving average model are adopted as the predictivemodels for the approximate components and the detail components respectively. Then，the final predictive value of the short-term wind speed is obtained by the combination of the two components. The simulation results indicate that higher accuracy can be obtained in this prediction method.)

说明：  数字信号处理中DSP中的matlab编程，有关汉明窗函数，汉宁窗以及凯撒窗的编写。(DSP digital signal processing in matlab programming, the Hamming window function, Hanning window, and the preparation of Caesar.)

MATLAB仿真程序，基于直流输电系统（HVDC）的MMC（modular multilevel converter）结构变流系统。程序主要包括主变流部分及其控制部分，MMC为7电平结构。程序测试OK。(a power convertion system realized in MATLAB SIMULINK. the system is carried out with a kind of newly investigated converter named Modular Multilevel Converter of seven levels.)

数字信号定时子程序，用于定时信号的最佳采样点。(Digital signal timing subroutine for the optimal sampling point timing signal.)

CAR模型MATLAB程序,考虑带时变参数的CAR模型，用遗忘因子RLS估计参数(CAR MODEL PROGRAMME)

LTSA[19] is based on the intuition that when a manifold is correctly unfolded, all of the tangent hyperplanes to the manifold will become aligned. It begins by computing the k-nearest neighbors of every point. It computes the tangent space at every point by computing the d-first principal components in each local neighborhood. It then optimizes to find an embedding that aligns the tangent spaces.

对比LDPC Hamming 循环卷积码三种编码方式的误码率(Contrast BER LDPC Hamming codes are three circular convolution encoding)