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<!DOCTYPE html>
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<title>Ruichen Ni's Blog</title>
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About
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Ruichen Ni's Blog
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文本函数解析树算法
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这是我博士课题中的一个小算法，用于解析形如 \( f(X,Y,Z) \) 以空间坐标为变量的文本函数并进行表达式计算。当时的目的是为了能够统一地设置流场的初始状态，由于流场的初始状态的界面往往可以通过解析函数来表示，因此设计了以空间坐标 \( (X,Y,Z) \) 为变量的函数表达式解析。通过文本函数解析避免了初始状态文件的导出，并且在后续做多相流的时候还可以拿来计算相应的初始体积分数。
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<p class="f6 lh-copy mv0">By [Ruichen Ni]</p><a href="/post/%E6%96%87%E6%9C%AC%E5%87%BD%E6%95%B0%E8%A7%A3%E6%9E%90%E6%A0%91%E7%AE%97%E6%B3%95/" class="ba b--moon-gray bg-light-gray br2 color-inherit dib f7 hover-bg-moon-gray link mt2 ph2 pv1">read more</a>
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移动构造函数（浅拷贝）和具名返回值优化(NRVO)
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针对数据量特别大的对象实例，运算过程中都要特别关注对其的拷贝操作，例如大型矩阵的乘法运算\(A_{r \times s}\cdot B_{s \times t}\) 等等。出于代码的复用性考虑，我们会将这些运算封装成函数调用。在C++新标准前，通常的做法是将对象实例通过形参列表将引用或者指针传入以避免大数据的拷贝操作，在C++17新标准之后，我们可以采用C++编译器的具名返回值优化(NRVO)功能，并搭配浅拷贝的移动构造函数来避免大数据的拷贝操作。
</div>
<p class="f6 lh-copy mv0">By [Ruichen Ni]</p><a href="/post/%E7%A7%BB%E5%8A%A8%E6%9E%84%E9%80%A0%E5%87%BD%E6%95%B0%E5%92%8C%E5%85%B7%E5%90%8D%E8%BF%94%E5%9B%9E%E5%80%BC%E4%BC%98%E5%8C%96/" class="ba b--moon-gray bg-light-gray br2 color-inherit dib f7 hover-bg-moon-gray link mt2 ph2 pv1">read more</a>
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Marriage Certificate
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Congratulations to ourself for marriage certificate!
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<p class="f6 lh-copy mv0">By [Ruichen Ni]</p><a href="/post/marriage-certificate/" class="ba b--moon-gray bg-light-gray br2 color-inherit dib f7 hover-bg-moon-gray link mt2 ph2 pv1">read more</a>
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模板函数返回类型推断
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自动注册机制的工厂模式
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基于YOLO LITE的人脸口罩检测
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