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几篇关于机器学习的PPT课件。A few PPT coursewares about machine learning.(A few PPT coursewares about machine learning.)

说明：  哈尔滨工业大学,visual basic,编程课件，第3章(Harbin University of Technology, Visual Basic, Programming Courseware, Chapter 3)

说明：  what the test is it test to be tes

后台发送按键小程序。可以将指定按键命令发送到指定窗口。(Background Send button applet. Designated key commands can be sent to the specified window.)

一个matlab中读取excel文件的例子,并且以plot的形式显示,(An example of a read excel file in matlab, and in the form of the plot,)

有2*n个盒子排成一行，其中有两个相邻的空盒，有n-1个盒子有符号 A ，有n-1个盒子有符号 B 。例如，n=5，并有初始配置如下： A B B A . . A B A B (2* n box row, wherein there are two adjacent empty box, n-1 of a box with the symbol ' A' , the symbol ' B' n-1 th box. For example, n = 5, and the initial configuration is as follows: ABBA .. ABAB)

说明：  单片机直流无刷电机驱动单片机直流无刷电机驱动(moto driver)

一个可以在自己的电脑屏幕上生成烟花的小程序，可以烟花没有设计成圆的(One can generate fireworks on their computer screen applet, you can not designed to circle fireworks)

读取两日期，并算两个日期间的天数。示范日期类型的操作。　(read two dates, and count the period of two days. Model date type of operation.)

主成分分析(PCA)是多元统计分析中用来分析数据的一种方法,它是用一种较少数量的特征对样本进行描述以达到降低特征空间维数的方法,(Principal Component Analysis (PCA) is a method used to analyze data in multivariate statistical analysis. It uses a small number of features to describe samples in order to reduce the dimension of feature space.)