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MCM2019-C题模型部分
总体思路是使用数据挖掘中的挖掘频繁项原理来挖掘毒品之间的关系、人口普查数据与毒品之间的关系。 以下是论文第二部分的主干。 Glossary & Symbols Glossary 数据立方体 data cube维 dimension分层 hierarchy hierarchy is a mapping sequence that maps the underlying conceptual set to a higher level频繁模式 frequent pattern关联规则 association rule支持度 support置信度 confidence提升度 lift出现频度 instances 频繁项集 frequent itemset Symbols 公式 confidence(A => B) = P(A|B) = support_count(AUB)/support_count(A) Model 1 1 Data Analysis The data in MCM_NFLIS_Data.xlsx can be abstracted as data cut with 4 dimension, the 4 demension are time, position, substance name and substance report number. In time dimension we have one hierarchy —— year, in position dimension we have two hierarchy —— state and county, in substance name dimension...