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Welcome to Hexo! This is your very first post. Check documentation for more info. If you get any pro
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Sigmoid Function$$f(x)=\left(\frac{1}{\left(1+\exp ^{-x}\right)}\right)-(1.4)$$Sigmoid Function 在预测二
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Least-Squares Problems by QR Factorization令 A 为训练集 $A=\left[a_{1}, a_{2}, \ldots, a_{n}\right] \in R
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历史
Data Manipulation Language (DML): SELECT, INSERT, UPDATE, DELETE.
Data Definition Language (DDL):
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<a class="post-title-link" href="/2020/05/02/c%E6%9C%89%E5%85%B3/" itemprop="url">c有关</a></h1>
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fork()底层实现fork之后，操作系统会复制一个与父进程完全相同的子进程，虽说是父子关系，但是在操作系统看来，他们更像兄弟关系，这2个进程共享代码空间，但是数据空间是互相独立的，子进程数据空间中的
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