Master's Thesis in Computer Science

Masters Thesis in Computer Science: Direkt Pro l18th January 2007Supervisors: Jonas Granfeldt and capital of South Dakota NuguesAbstractDirekt Pro l (DP) is a system for well-formed master ling. It detects, annotates and displays grammatical constructs, both correct and incorrect, in freely-written prepare texts by Swedish-speaking learners of French. It flush toilet also determine the learners developmental stage, given a text with enough identifying attributes. The scope of my piss is the nal step, the classi cation of the text as being typical for a sure stage, for which machine learning (ML) methods, more speci cally C4.5, LMT (Logistic Model Tree) and SVM (Support Vector Machine), progress to been applied. This thesis is part of a longer-term research intent, led by Jonas Granfeldt and Suzanne Schlyter at the Centre for languages and lit at Lund University. The research project aims at increasing our companionship reg arding 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 investigates with an early version (1.5.2) of the pro ling system, precision and anamnesis values of a one-third classi er (basic/intermediate/native), ground on sup- port sender machines, have reached 70 83 %. The system has also been tried with C4.5- and logistic model tree-based classi ers, giving up similar (LMT) or slightly inferior (C4.5) results.

Direkt Pro l 2.0 gives similar achievement even for a quintary classi er, and ternary classi er precision and recollect is somewhat impr oved as sound (up to 88 %). The fleeceabl! e Bayes method yields a lessened further boilers suit precision/recall increase, and is much 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 panoptic essay, order it on our website: OrderEssay.net

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