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说明：  python神经网络书中的代码，非常使用的学习资料(the code in, this is trully useful)

说明：  可以用其计算信噪比，只需要输入原信号和带噪声信号即可。还有一段EMD分解程序(It can be used to calculate the signal-to-noise ratio, only need to input the original signal and the signal with noise.)

说明：  可以ADC外接电阻分压装置，从而实现根据所得的电压进行挡位切换。自动测量电阻。(ADC can be connected with resistance voltage divider to realize gear switching according to the voltage obtained. Automatic measurement of resistance.)

一个水掉落至方形容器的执行动画，可以查看SPH动态效果(An execution animation of water falling into a square container.)

Description Calculate a*b Input Two integer a,b (0

A model that changes the effect of the program()

说明：  QQwry IP数据库，用于判断IP所属地区，2019版(QQwry IP Database, Used to Judge IP Areas, 2019 Edition)

使用C#编程，将操作ini,的方法编写成类，方便下次直接调用(Using C # programming, the method of operating ini is written into classes to facilitate the next direct call.)

Windows墙纸更改事例-Windows wallpaper changes examples

说明：  数值方法课件 好好好好好好好好好好好好 (numerical method courseware good good good good good good good good good )