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计算机科学 1999
一个不确定性数据库模型及其语义Keywords: 不确定性数据库模型urm概率定量模糊数据关系代数 Abstract: inthispaper,basedonprobabilisticandcognitiveuncertainties,wesetupanuncertaindatabasemodelandpresentedtheuncertainrelationalalgebra,andprovedthattheuncertainnormalformsareclosedunderoperationsoftheuncertainrelationalalgeb
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