... 抽样sampling 抽样规则sampling prescription 抽样检验samplimg inspection ...
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...可得到给定群落物种−多度分布的中性模型参数)提出了多元联合模型(multivariate coalescence model)和抽样规则(sampling formula) 。前推法和后推法从各自不同的角度完善了Hubbell(2001)中性模型的解析分析。
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...抽样规则 英文名称: Flexible sheets for waterproofing - Bitumen, plastic and rubber sheets for roof waterproofing - Rules for sampling 标准组织: 【BSI】英国标准 正文语种: 国标分类: 【Q17】屋面、铺面防水与防潮材料 ICS分类: 【91.100.50】粘合料...
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要减少执行时间,除非规则是柱状的,否则,在可能的情况下采用虚拟表,并避免使用抽样。
To reduce execution time, unless the rules are columnar, you should use virtual tables where possible, and avoid using sampling.
图4展示了具有绑定的规则,它涉及来自多个表的列,这导致了在连接操作之后进行抽样。
Figure 4 shows a rule with bindings that involve columns coming from more than one table, which causes the sampling to be done after the join operation.
这样,就可以利用抽样来很有效地减少规则所评估的记录的数量,并减少输出量。
Thus, you can use a sampling to effectively reduce the number of records being evaluated by the rule itself by, and reduce the size of the output.
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