在对分类与归并性质充分研究的基础上，探讨了条件分类、约简与核的层次关系。

According to the properties of partition and merging, the hierarchy relation among condition classification, reduction and core is studied.

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设计了医药卫生科学数据编码方案。结论分类编码研究实现了针对数据的归并和信息的组织。

ConclusionThe development of the classification and coding can merge and organize the medical science data effectively.

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提出一种新的外分类算法，该算法无须预先产生初始归并段，可以快速获得预定分类结果。

This paper proposes a new external sorting algorithm. The algorithm need not to produce original merged segment in advance and can immediately get the anticipant sorting result.

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提出一种新的外分类算法，该算法无须预先产生初始归并段，可以快速获得预定分类结果。

This paper proposes a new external sorting algorithm. The algorithm need not to produce original merged segment in advance and can immediately get the anticipant sorting result.

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