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神经网络已知输入输出，怎么获得输入对输出的权重。
BP神经网络的更新方式是利用每一层的输出误差对连接权值进行偏导，梯度下降的方向进行更新。你这是使用的工具箱进行直接计算的，一般地，都是自己写出BP算法的具体更新迭代算法，这样子训练时每一步训练的权值大小都可以进行保存出来的。三层NN，BP算法就1-2间的权...
3 years ago | 0
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