二、神经网络基本结构-深度学习EECS498/CS231n

why RELU works? Vector Derivation But Jacobian is sparse: off-diagonal entries are all zero! Never explicitly form Jacobian. 结果我们发现,dy/dx_1,1 = [3,2,1,-1]其恰好是w的第一行,故而不需要显性地进行求解。 d L / d x i , j = ( d
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