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Update 2.3-deep-learning-neural-network-introduction.ipynb
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sigmod改为sigmoid
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ZhaoQianfeng committed Jul 30, 2020
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6 changes: 3 additions & 3 deletions chapter2/2.3-deep-learning-neural-network-introduction.ipynb
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"cell_type": "markdown",
"metadata": {},
"source": [
"### sigmod 函数\n",
"### sigmoid 函数\n",
"$a=\\frac{1}{1+e^{-z}}$ 导数 :$a^\\prime =a(1 - a)$\n",
"\n",
"在sigmod函数中我们可以看到,其输出是在(0,1)这个开区间,它能够把输入的连续实值变换为0和1之间的输出,如果是非常大的负数,那么输出就是0;如果是非常大的正数输出就是1,起到了抑制的作用。"
"在sigmoid函数中我们可以看到,其输出是在(0,1)这个开区间,它能够把输入的连续实值变换为0和1之间的输出,如果是非常大的负数,那么输出就是0;如果是非常大的正数输出就是1,起到了抑制的作用。"
]
},
{
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},
"nbformat": 4,
"nbformat_minor": 2
}
}

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