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修正与原文不一致的公式
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@@ -154,7 +154,7 @@
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一个实验的有效规模定义为:
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<img src="http://chart.googleapis.com/chart?cht=tx&chl=N%3D(%5Cfrac%7B1%7D%7B%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bcontrol%7D%7D%7D%2B%5Cfrac%7B1%7D%7B%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bexperiment%7D%7D%7D)" style="border:none;" alt="N=(\frac{1}{\text{queries}_{\text{control}}}+\frac{1}{\text{queries}_{\text{experiment}}})"/>
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<img src="http://chart.googleapis.com/chart?cht=tx&chl=N%3D%5Cfrac%7B1%7D%7B1+%2F+%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bcontrol%7D%7D+%2B+1+%2F+%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bexperiment%7D%7D%7D" style="border:none;" alt="N=\frac{1}{1 / \text{queries}_{\text{control}} + 1 / \text{queries}_{\text{experiment}}}" />
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在工程实践中,我们主要关注 <img src="http://chart.googleapis.com/chart?cht=tx&chl=%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bcontrol%7D%7D" style="border:none;" alt="\text{queries}_{\text{control}}" /> 和 <img src="http://chart.googleapis.com/chart?cht=tx&chl=%5Ctext%7Bqueries%7D_%7B%5Ctext%7Bexperiment%7D%7D" style="border:none;" /> ,但要通过 <img src="http://chart.googleapis.com/chart?cht=tx&chl=N" style="border:none;" alt="N" /> 个和才能影响相关的实验指标,为了正确确定 <img src="http://chart.googleapis.com/chart?cht=tx&chl=N" style="border:none;" alt="N" /> 值,我们需要知道:
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