source number estimate
源数估计
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The number shown in each node is the optimizer's estimate for the cardinality of the underlying data source or operation node.
每一个节点上显示的数字都是优化器对基础数据源或操作节点的基数的估计。
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The SRP is the key to estimate the source coherency structure and total signal number.
本文论述了利用平滑秩图可估计出信源的相干结构。
It's a tantalizing prospect: Based on an estimate of the number of rivers around the world with suitable conditions, it's a potential source of 1, 700 terawatt hours a year of energy globally, according to estimates by Statkraft's scientists.
FORBES: Getting Power From Salty Water
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