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1) 使用凝聚型层次聚类算法（即最小生成树算法）对所有数据点进行聚类，最后聚成3类。相异度定义方法可选择single linkage、complete linkage、average linkage或者average group linkage中任意一种。 2) 使用C-Means算法对所有数据点进行聚类。C=3。 任务2（必做）： 使用高斯混合模型（GMM）聚类算法对所有数据点进行聚类。C=3。并请给出得到的混合模型参数（包括比例??、均值??和协方差Σ）。 任务3（全做）： 1) 参考数据文件第三列的类标签，使用聚类有效性评价的外部方法Normalized Mutual Information指标，分别计算任务1和任务2聚类结果的有效性。 2) 使用聚类有效性评价的内部方法Xie-Beni指标，分别计算任务1和任务2聚类结果的有效性。(The main results are as follows: 1) the condensed hierarchical clustering algorithm (that is, the minimum spanning tree algorithm) is used to cluster all the data points, and finally it is grouped into three categories. Any of the single linkage,complete linkage,average linkage or average group linkage methods can be selected for the definition of dissimilarity. 2) using C-Means algorithm to cluster all data points. C = 3.)

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matlab处理图像，压缩图像，去燥，增强(Matlab processing images, compressed images, dryness, enhancement)

说明：  python简单验证判断nan，同时讨论python中nan的一些用法和问题，以及处理方法。(Python simply verifies and judges nan, and discusses some usage and problems of nan in python, as well as processing methods.)

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说明：  it680pdf hdmirx mainmcu

说明：  SLAM 例子2维激光雷达建图、包含路径、当前位姿、栅格地图(SLAM example 2D laser radar mapping, including path, current pose, raster map)

C++_console self writting application for beginners into c-C++_console self writting application for beginners into c++

本套软件适用于各大高校、中小学、幼儿园、培训机构等单位的教学管理软件。 (This software applies to all major universities, primary and secondary schools, kindergartens, training institutions and other units of teaching management software.)

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