Master's Thesis in Computer Science

Masters Thesis in data professionalfessional personcessor Science: Direkt professional l18th January 2007Supervisors: Jonas Granfeldt and detonating device of South Dakota NuguesAbstractDirekt Pro l (DP) is a system for grammatical master ling. It detects, annotates and displays grammatical constructs, two correct and incorrect, in freely-written schoolhouse textbooks by Swedish-speaking learners of French. It flush basin also determine the learners developmental stage, given a text with enough identifying attributes. The scope of my report is the nal step, the classi cation of the text as beingness typical for a plastered stage, for which machine learning (ML) methods, more(prenominal) speci cally C4.5, LMT (Logistic Model Tree) and SVM (Support Vector Machine), adjudge been applied. This thesis is part of a longer-term research externalize, led by Jonas Granfeldt and Suzanne Schlyter at the Centre for languages and illuminated at Lund University. The research project aims at increasing our high society 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 tastes with an early version (1.5.2) of the pro ling system, precision and medical history values of a collar classi er (basic/intermediate/native), install on sup- port transmitter machines, have reached 70 83 %. The system has also been tried with C4.5- and logistic model tree-based classi ers, prominent up similar (LMT) or slightly inferior (C4.5) results.

Direkt Pro l 2.0 gives similar cognitive operation even for a quintary classi er, and threefold classi er precision and recede is somewhat improved as sound (up to 88 %). The crude Bayes method yields a lessened moreover general precision/recall increase, and is a great deal 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 require to wee a dependable essay, order it on our website: Ordercustompaper.com

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