Yunjiao Xue

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Classical tree similarity measuring approaches focus on the structural and geometrical characteristics of the trees. The degree of similarity between two trees is measured by the minimal cost of editing sequences that convert one tree into the other one from pure structural perspective. Differently, when the trees are created to represent concept structures(More)
Spoken language education plays an important role in modern language courses. Computer-based spoken language test systems provide a convenient, efficient and reliable approach to test and assess individual spoken abilities. But most E-Learning systems concern more about written training and test. Existing models and systems do not completely meet special(More)
Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples(More)