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US09158815B2 Estimating a number of unique values in a list 有权
估计列表中的一些唯一值

Estimating a number of unique values in a list
摘要:
A method determines a number of unique values in a sample of a list of values and estimates a number of the unique values for an unsampled portion of the list of values. The method estimates a number of the unique values in the list by adding the number of unique values in the sample to the number of the unique values in the unsampled portion.
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