Linear Regression
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矢量加法 比 按元素相加 要快得多
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噪声 + 极大似然
$$ \begin{gather} \begin{aligned} \pmb y &= \pmb{w^T x} + b + \epsilon \\ \epsilon &\sim \mathcal{N} ( 0, \sigma^2) \end{aligned} \end{gather} $$
$$ \begin{gather} \begin{aligned} P(y| \pmb{ X }) &= \end{aligned} \end{gather} $$