chap9-5

用AR模型法进行功率谱估计的各种算法比较，包括自相关法，BURG法，ARMA模型估计，PISARENCO谐波分解法(AR model method used to carry out a variety of power spectrum estimation algorithms, including the auto-correlation method, BURG Act, ARMA model is estimated, PISARENCO harmonic decomposition method)

matlab计数器，一个小程序，供学习者用(matlab counter, a small program for learners with)

该集成包包括AHP，因子分析，回归分析，聚类分析等系统分析算法的matlab实现。(The integrated package, including AHP, factor analysis, regression analysis, cluster analysis, system analysis algorithm matlab.)

画图工具实现windows GDJ 图像绘制 子窗口控制项的使用.(Easy paint)

A matlab program on ECG signal

说明：  三相逆变器电压电流双环simulink模型(Three phase inverter voltage current double loop)

实现一个序列的分数差分的matlab程序，能够提取序列的长相关信息。(the process of fratual diff in the matlab and it can know the LRD of the sequnce)

去斜处理后的加窗操作，线性调频信号，绝对有用，不像其他的那么坑(To deal with the oblique add window after the operation, the linear frequency modulation signal, is absolutely useful, unlike other then pit to oblique processed add window operation, the linear frequency modulation signal, is absolutely useful, unlike other pit)

欧拉角表示法具有简便、几何意义明显等优点，同时姿态敏感器可以直接测出这些参数，能较方便地求解用这些姿态参数描述的姿态动力学方程。但采用欧拉角的姿态描述方法存在奇点问题，且需多次三角运算。而采用四元数表示方法则可以避免这些问题。(conversion between euler angle and quaternion method)

Koch分形曲线计算地图边界，此程序能较好的计算任意凸图形边界长度。程序计算步骤为：提取图形边界，将边界点按与中心点所成角度排序，每隔一定角度取一边界点，对选取的边界点做3次迭代Koch分形(Koch fractal curve map boundary, this procedure can be better calculated arbitrary convex graphical boundary length. The program calculation steps: to extract graphical boundary, the boundary points and the center point of the angled Sort every angle to take a boundary point, done the 3 iterations Koch fractal selected border points)