Dissertation > Excellent graduate degree dissertation topics show

Research on Domain Ontology Based Web Information Collection and Indexing

Author: LvYuPeng
Tutor: ZhouKuanJiu
School: Dalian University of Technology
Course: Management Science and Engineering
Keywords: Noumenon Information Retrieval Subject-oriented Extended Query
CLC: TP393.092
Type: Master's thesis
Year: 2008
Downloads: 333
Quote: 3
Read: Download Dissertation

Abstract


With the explosive growth of the rapid development of Internet technology and network information, the growing demand for information retrieval, Google, Baidu and other search engines have become essential for people's daily life online information search tool. Network users in real life information needs vary, some users will need a lot of information, in a field formed after processing and finishing, or user needs resources for retrieval, data mining, and generate knowledge base, such as, digital libraries, theme professional website information service agencies to get the information they need from the vast amounts of Web information services for their users. This topic is designed for frequent access to information a user based on domain ontology network information collection retrieval system. In this paper, the use of ontology concept hierarchy proposed an ontology-based text topic identification and retrieval model system, the functional modules of the system is divided into three main parts, First body construction, management and storage; second is to use Web crawler technology subject-oriented collection of web pages; Third, information indexing module collected information indexing questions sent by the user to preprocess extended ontology-based queries, feedback information of the high correlation . This paper first introduces the ontology and ontology-based information retrieval research status at home and abroad, and describes the general steps to build ontology ontology research, then the key technologies of ontology-based Web information acquisition and retrieval systems: (1) based on ontology concept level Web page topic recognition algorithm, the main use of improved BestFirst algorithm subject-oriented collection of Web pages, to identify how the body concept of web content and URL links relevant to the subject, how to find the URL link added acquisition job queue and sorted collection; (2) combine Lucene open source technology, inverted index of the collection of information; semantic expansion of the relationship between the body concept of user queries, and given the weight group of extended keywords Web similarity similarity size back to the page to the user, extended ontology-based query. Next, we analyze, design, a subject-oriented network information collection retrieval system. The system uses the C / S structure, the first use of the Jena API OWL (Web Ontology Language) ontology mapping to the database. The recycling collector of information collected and saved to the server, after indexing, and then through a web browser to access the Web server, and interact with the Servlet running on the Web server. Servlet analysis through the questions the extended query result ranking steps end result is returned to the user. Finally, we designed several experiments, collected the theme of the concept of different levels of accuracy, precision and recall of the retrieval system, as well as the system's operating efficiency, inspection, carried out a number of experiments to verify, and achieved good results . Experimental results show that the model and the effectiveness of the system.

Related Dissertations

  1. Establishment and Update of Similar Users’ Cluster in Personalized Information Retrieval,TP391.3
  2. Ontology Based Approach to Fine-Granularity Knowledge Management,TP391.1
  3. Research on Information Retrieval Technology Based on Semantic Web,TP391.3
  4. Research on the Semantic Annotation of Domain with WordNet,TP391.1
  5. Design and Implementation of Knowledge Management System Based on Ontology,TP311.52
  6. Research on Web Service Matchmaking Based on Semantic,TP393.09
  7. The Research of Medical Information Retrieval and Extraction Technologies Based on Ontology,TP391.1
  8. The Design and Implementation of a Distributed Storage and Retrieval System,TP333
  9. Public Opinion of Oil Field Network Monitoring System Based on Query Expansion,TP393.09
  10. A Study on the Emotional Expression of Present Chinese Classical Dancing Creation,J722.4
  11. Information System of the Common Fish Eggs in Bohai and Yellow Sea and the Preliminarily Biological and Ecological Study of Fish Eggs and Larvae,S917.4
  12. Research and Application on Heterogeneous Data Integration of Smart Grid,TM76
  13. Research on Adaptive Teaching and Research Information Recommendation Model,TP393.09
  14. Web2.0 environment Network Information Retrieval Model,G354
  15. A Research on Information Retrieval Visualization Based on Technology Accept Model,G252.7
  16. Music Identification Based on Compressed Sensing,TN912.34
  17. Research on Domain-Driven COP Visualization Middleware,TP391.41
  18. Design and Implementation of Logistics Emergency Processing System Based on CBR and RBR,TP311.52
  19. Research on Adaptive Information Retrieval System Based on Agent,TP391.3
  20. Research on Reflection for Context-Aware Computing,TP391.1
  21. Research of an Information Retrieval Algorithm Based on the Relevance of Mobile Search Users,TP391.3

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > The application of computer network > Web browser
© 2012 www.DissertationTopic.Net  Mobile