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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Extracting Keyphrases from Individual News Articles

Lund, Kristian January 2011 (has links)
Extraction of keyphrases from individual documents is a research area in which one try to extract a small set of keyphrases that describe the content of a single document. The advantages with this form of extraction is that it retains most of the semantic context from the document.In this thesis we focus on the news article domain and use the structure of a news article to improve the quality of the extracted keyphrases. An existing individual document keyphrase extraction algorithm is used as the basis. This algorithm is enhanced by implementing a weighting system based upon the structure of news articles. In addition some other common methods for keyword extraction is applied. The effects of these changes are tested extensively in the evaluation phase.In the evaluation of the implemented prototype we find that the introduction of a weight based system yields results that are equal to the basic algorithm and that few improvements can be made. We do however find that an automatically generated stopword list based on the corpus improves the results by 1-2%.

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