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Activation functions 基本激活函数 \[ \text{We know that the value of sigmoid function must }\\ \text{between 0 and 1. But Andrew said that an activation }\\ 阅读全文
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###Of Studies——Francis Bacon Studies serve for delight, for ornament, and for ability. Their chief use for delight, is in privateness and retiring; fo 阅读全文
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A quick overview of neural network of Andrew Ng 图1.简单的概览 \[ 对于[1],我们有\\ \rightarrow z^{[1]}=W^{[1]}x+b^{[1]} \rightarrow a^{[1]}=\sigma(z^{[1]})\\ 对于[ 阅读全文