Edgar Meij's PhD thesis investigates how one can improve information access by employing the actual use of concepts as measured by the language that people use when they discuss them.
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Edgar Meij's PhD Thesis | Combining Concepts and Language Models for Information Access | phdthes.is Reviews
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Edgar Meij's PhD thesis investigates how one can improve information access by employing the actual use of concepts as measured by the language that people use when they discuss them.
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Pseudo Relevance Feedback
http://www.phdthes.is/html-edition/thesis-emeijse21.html
In this section we look at the performance of the relevance feedback models using pseudo relevance feedback, that uses the top ranked documents (which we denote. As feedback document set. In order to obtain these documents, we perform a. Query likelihood ( QL. Run (cf. Eq. 2.8. That also serves as our baseline. We then perform a grid search over. And the value of the query interpolation parameter,. Note that we exclude. As introduced in Section 3.4. While computationally expensive, it provides us with ...
Edgar Meij's PhD Thesis | Combining Concepts and Language Models for Information Access
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6 Linking Queries to Concepts
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Linking Queries to Concepts. In Chapter 5. We have used annotated documents to obtain a conceptual representation of a query model: a conceptual query model. As we have seen there, leveraging textual observations associated with concepts during query modeling significantly improves end-to-end retrieval performance. In this chapter we further investigate the process of mapping queries to concepts, a procedure we call conceptual mapping. Conceptually mapping queries is not only interesting from an IR.
7 Query Modeling Using Linked Concepts
http://www.phdthes.is/html-edition/thesis-emeijch7.html
Query Modeling Using Linked Concepts. In previous chapters we have seen various ways of updating the estimate of a query model, for example through the use of feedback information (Chapter 4. Or conceptual document annotations (Chapter 5. In essence, these approaches are a form of data. In multimedia environments, different modalities (text, video, speech, etc.) need to be combined. In cross-lingual IR. X00A0;we have added to this concepts in the form of document annotations. In Chapter 6. Term freque...
Discussion
http://www.phdthes.is/html-edition/thesis-emeijse33.html
Unless indicated otherwise, all results on which we report in this section use the best performing approach from the previous section, i.e., the SVM classifier with a linear kernel using the full queries (with ten-fold cross-validation when applicable). Results of ranking concepts based on the full query using different textual representations of the Wikipedia article associated with each DBpedia concept. The value for Cohen’s. Is 05111, which indicates fair overall agreement (. Is 05213. As with the.
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Edgar Meij's PhD Thesis | Combining Concepts and Language Models for Information Access
Edgar Meij's Ph.D. Thesis. Combining Concepts and Language Models for Information Access. Want to follow the latest thesis news? Or get in touch? Novel relevance feedback methods. Extensive comparison of pseudo. Novel method for linking queries to concept languages. Understanding of relevant features for concept identification. State of the art retrieval effectiveness on an extensive set of test collections. The public defense took place on Friday 10 December 2010, 10:00. Where can I read it?
Εθνικό Αρχείο Διδακτορικών Διατριβών: Αρχική
Σχετικά με το ΕΑΔΔ. Καλώς ήρθατε στο Εθνικό Αρχείο Διδακτορικών Διατριβών. Στο Εθνικό Αρχείο Διδακτορικών Διατριβών (ΕΑΔΔ) συγκεντρώνεται το σύνολο των διδακτορικών διατριβών που έχουν εκπονηθεί στα ελληνικά Πανεπιστημιακά Ιδρύματα, καθώς και οι διδακτορικές διατριβές που έχουν εκπονηθεί από Έλληνες διδάκτορες σε Πανεπιστημιακά Ιδρύματα του εξωτερικού και έχουν αναγνωριστεί από το ΔΟΑΤΑΠ. Την ευθύνη συγκρότησης, διάθεσης και διατήρησης του ΕΑΔΔ έχει δια νόμου το Εθνικό Κέντρο Τεκμηρίωσης (ΕΚΤ).
phdthesis-bioinformatics-maxplanckinstitute-molecularplantphys.matthias-scholz.de
Ph.D. thesis - Matthias Scholz - Max Planck Institute of Molecular Plant Physiology
Max Planck Institute of Molecular Plant Physiology. Approaches to analyse and interpret biological profile data. University of Potsdam, Germany. Advances in biotechnologies rapidly increase the number of molecules of a cell which can be observed simultaneously. This includes expression levels of thousands or ten-thousands of genes as well as concentration levels of metabolites or proteins. The full text PDF version. Is available at: URN: urn:nbn:de:kobv:517-opus-7839. Figures of this thesis. Visualising ...
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