To better illustrate the improvement in cardinality estimation, drop all the existing indexes on the EMPLOYEE table except the primary key index.
为了更好地解释说明基数估计值的提高，撤销除主键索引外的所有employee表上的现有索引。
The signal estimation precision of the linear model is an important index in applied project.
线性模型的信号估计精度是工程应用上非常重要的指标。
The estimation of tail index for regular variation heavy-tailed distributions aroused our concern, many scholars proposed several methods, but all of them have some disadvantages.
正规变化重尾分布的尾部指数的估计方法有很多种，但都不同程度地存在一定的局限性。
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