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Växjö University

Växjö University. Växjö University. Joakim Nivre . Who?. Växjö University (800) School of Mathematics and Systems Engineering (120) Computer Science division (30) Language Technology group (5): Models and Algorithms in Language Technology (MALT). Why?. Main focus of research:

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Växjö University

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  1. Växjö University Växjö University Joakim Nivre

  2. Who? • Växjö University (800) • School of Mathematics and Systems Engineering (120) • Computer Science division (30) • Language Technology group (5): • Models and Algorithms in Language Technology (MALT)

  3. Why? • Main focus of research: • Robust and efficient algorithms for natural language processing • Machine learning to improve accuracy • Need for treebanks: • Training and validation in machine learning • Evaluation of accuracy • No large treebank available for Swedish!

  4. What? • Projects • Swedish Treebank: • Pilot project funded by The Bank of Sweden Tercentennary Foundation (RJ) • Symposium in Växjö, November 2002 • Project proposal to RJ, March 2003 • Stochastic Dependency Grammars: • Theoretical properties of dependency grammars • Robust and efficient parsing algorithms • Machine learning to improve parsing accuracy

  5. What? • Corpora: • SynTag converted to dependency trees: • 100 k words, manually annotated (Järborg 1986) • Automatic conversion to dependency trees • Tools: • Trainable part-of-speech tagger • Efficient in training and tagging • Suffix model for unknown words • Dependency parser (under development) • Linear time projective dependency parsing • Trainable through external parse table

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