第一个MR Job中,Map的输出结果会随机分布到Reduce中,每个Reduce做部分聚合操作,并输出结果,这样处理的结果是相同的Group By Key有可能被分发到不同的Reduce中,从而达到负载均衡的目的;第二个MR Job再根据预处理的数据结果按照Group By Key分布到Reduce中(这个过程可以保证相同的Group By Key被分布到同一个Reduce中...
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From noble metal to Nobel Prize: palladium-catalyzed coupling reactions as key methods in organic synthesis. Angew. Chem. Int. Ed. 49, 9047–9050 (2010). Article CAS Google Scholar Suzuki, A. Cross-coupling reactions of organoboranes: an easy way to construct C–C bonds (Nobel Lecture)...
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"Allen" key perfected that in its essentiality is characterized by the fact of having incorporated one of the ends of the filiform body of conventional section that constitutes a handle drive. (Machine-translation by Google Translate, not legally binding)...
‘automatic expression histology’ and can facilitate investigation of the functional significance of cell-type isoform specificity. Recently developed experimental methods for this purpose—for example, isoform screens49—are a promising direction and will be key to understanding the significance of the ...