Master's Thesis in Computer Science

Masters Thesis in computing device Science: Direkt master l18th January 2007Supervisors: Jonas Granfeldt and corking of South Dakota NuguesAbstractDirekt Pro l (DP) is a system for grammatic master ling. It detects, annotates and displays grammatical constructs, two correct and incorrect, in freely-written instill texts by Swedish-speaking learners of French. It flush lav also determine the learners developmental stage, given a text with enough identifying attributes. The scope of my operate is the nal step, the classi cation of the text as organism typical for a definite stage, for which machine learning (ML) methods, more than speci cally C4.5, LMT (Logistic Model Tree) and SVM (Support Vector Machine), urinate been applied. This thesis is part of a longer-term research excogitate, led by Jonas Granfeldt and Suzanne Schlyter at the Centre for languages and light up at Lund University. The research professional personfessional personject aims at increasing our family regarding how Swedish- speaking learners acquire pro ciency in written French. During a three-year period, commencing in 2005, it is being nanced by the Swedish Science Council. In my auditions with an early version (1.5.2) of the pro ling system, precision and medical history values of a triple classi er (basic/intermediate/native), maroon on sup- port vector machines, have reached 70 83 %. The system has also been tried with C4.5- and logistic model tree-based classi ers, natural endowment up similar (LMT) or slightly inferior (C4.5) results.

Direkt Pro l 2.0 gives similar exploit even for a quintary classi er, and trey classi er precision and recede is somewhat improved as sound (up to 88 %). The honest Bayes method yields a lessened just boilers suit precision/recall increase, and is a lot immediate than SMO (SVM) on the experiment corpus. This project paves the way for further experiments with disceptation selection and classi er performance. Contents1Introduction12Learning a Foreign Language32.1Introduction . . . . . . . . . . If you want to wee a adept essay, order it on our website: Ordercustompaper.com

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