A nested model is nested within another model where the first set of freely estimated parameters is a subset of those estimated in another model.
当一套自由估计的参数是那些在另一个模型中被估计的一个子集时，第一个嵌套模型被嵌套在另一个模型中。
Based on the concept of relation and sub-relation, this paper investigates the inherent meaning of traditional set operations for the nested relational data model.
本文提出的一个嵌套关系模型支持文本存储和文本检索操作，其中特征文件索引为文本检索提供了技术支持。
Based on the concept of relation and sub-relation, this paper investigates the inherent meaning of traditional set operations for the nested relational data model.
本文提出的一个嵌套关系模型支持文本存储和文本检索操作，其中特征文件索引为文本检索提供了技术支持。
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