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世界棕榈油的生产贸易及我国消费现状分析 被引量:2
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作者 胡小中 《粮油食品科技》 北大核心 2012年第2期55-57,60,共4页
棕榈油作为世界主要油脂品种之一,其生产量和贸易量均位居世界第一,在植物油生产和消费市场中占有极其重要的地位。详细论述了近年世界棕榈油的生产及进出口贸易情况;并对近年我国棕榈油的进口数量、品种、消费以及分提加工现状进行了... 棕榈油作为世界主要油脂品种之一,其生产量和贸易量均位居世界第一,在植物油生产和消费市场中占有极其重要的地位。详细论述了近年世界棕榈油的生产及进出口贸易情况;并对近年我国棕榈油的进口数量、品种、消费以及分提加工现状进行了分析。 展开更多
关键词 棕榈油 贸易 消费 分提加工
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Enhancing Domain Knowledge with Semantic Models of Web Documents
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作者 Anna Rozeva 《Journal of Mathematics and System Science》 2013年第7期319-326,共8页
The paper considers the problem of semantic processing of web documents by designing an approach, which combines extracted semantic document model and domain- related knowledge base. The knowledge base is populated wi... The paper considers the problem of semantic processing of web documents by designing an approach, which combines extracted semantic document model and domain- related knowledge base. The knowledge base is populated with learnt classification rules categorizing documents into topics. Classification provides for the reduction of the dimensio0ality of the document feature space. The semantic model of retrieved web documents is semantically labeled by querying domain ontology and processed with content-based classification method. The model obtained is mapped to the existing knowledge base by implementing inference algorithm. It enables models of the same semantic type to be recognized and integrated into the knowledge base. The approach provides for the domain knowledge integration and assists the extraction and modeling web documents semantics. Implementation results of the proposed approach are presented. 展开更多
关键词 Semantic model knowledge base document classification domain ontology knowledge integration.
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