中文说明：利用BP神经网络来识别英文字母,采用MATLAB编程，通过26个英文字母来训练该算法，然后可以准确地识别英文字母。
English Description：
Using the BP neural networks to identify the letters of the alphabet, using MATLAB programming, the 26 letters of the alphabet to train the algorithm, and then you can accurately identify the letters of the alphabet.