The performance of the program has reached a high level, The title of the commercial is undergraduate course you Fractal dimension calculation algorithm matlab code blankets.

无源蜂鸣器内部不带震荡源，所以如果用直流信号无法令其鸣叫，必须用2K~5K的方波去驱动它。在树莓派上实现无源蜂鸣器的鸣响(The passive buzzer does not have a shock source inside, so if the signal can not be called with a DC signal, it is necessary to drive it with the square wave of 2K~5K. The sounding of a pas

树莓派2性能有所增强，ubuntu mate也越来越酷，写个教程告诉大家如何安装，少走弯路(The raspberry pie's 2 performance has been enhanced, and Ubuntu mate is becoming more and more cool.)