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Machine Learning - Coursera week5 cost function and backpropagation 1
時間 2021-01-02
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1. cost function 這個多類別分類的神經網絡和二分類的輸出個數不同,二分類只有一個輸出,二多分類模型有多個輸出。多分類模型的輸出也用one-hot碼錶示。 變量的定義: L = total number of layers in the network sl s l = number of units (not counting bias unit) in layer l K = n
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