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An approach supervised by ontology is proposed for Web information extraction after analyzing two types of methods based on wrapper and concept model. Using concepts and taxonomy relation between concepts provided by ontology, this method can locate the wanted information blocks in Web page quickly by judging if adjacent sub-trees which are included in HTML Tree are isomorphic. Furthermore, combining...
The current grid information retrieval commonly uses the method based on keywords, and the retrieval method depends on the keywords that match their participation in the external form of characters, rather than the concept expressed by their neglect of the semantic information inherent in the word. It brings about varieties of problems, including too much information or false drop, etc. Thus, the...
Ontology is applied to a real-world Web intelligent question answering system in PC troubleshooting domain as an improvement, so semantic relations need to be extracted to construct ontology semi-automatically. The paper mainly pays attention to "product-trouble" relation and "product-attribute" relation. A two stage semantic relation extraction method is proposed. In stage one,...
With the popularization of network and the demand of distance education, question answering system becomes an important part in network teaching. Through analyzing defects of the existing question answering system, the paper advances a model of automatic question answering system which based on natural language processing. Based on this model, the paper introduces application theory and framework...
The BITQAP question answering platform is ontology-based semantic question answering system. In ldquoComputer Organization and Architecturerdquo course, we apply the platform as CAI tools to answer questions. In the paper, we proposed methods to extract the concepts and relations from course corpus. Term extraction is the first step of ontology learning. The Chinese domain terms have three features:...
Personalized information services have been born under the background of "information explosion" and will be the main mode of information services in the future. This paper describes the conceptual and formal models of ontology-based personalized information services for mining right trade. And it realizes precisely matching between supply and demand of information services for mining right...
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