3. 损失函数和优化介绍

损失函数和优化介绍 1. Loss function A loss function tells how good our current model classifier is. 1.1 Multiclass SVM loss L i = ∑ j ≠ y i m a x ( 0 , s j − s y i + Δ ) L_i = \sum_{j \neq y_i}max(0, s_j - s_{

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