Ambiguity Resolution in Language Learning: Computational and by Hinrich Schütze PDF

By Hinrich Schütze

ISBN-10: 1575860740

ISBN-13: 9781575860749

ISBN-10: 1575860759

ISBN-13: 9781575860756

This quantity is anxious with how ambiguity and ambiguity solution are realized, that's, with the purchase of different representations of ambiguous linguistic varieties and the information worthy for choosing between them in context. Schütze concentrates on how the purchase of ambiguity is feasible in precept and demonstrates that individual kinds of algorithms and studying architectures (such as unsupervised clustering and neural networks) can be triumphant on the activity. 3 kinds of lexical ambiguity are handled: ambiguity in syntactic categorisation, semantic categorisation, and verbal subcategorisation. the quantity offers 3 assorted versions of ambiguity acquisition: Tag house, be aware house, and Subcat Learner, and addresses the significance of ambiguity in linguistic illustration and its relevance for linguistic innateness.

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There are arguably fewer different types of right syntactic contexts than types of syntactic categories. For example, transitive verbs and prepositions belong to different syntactic categories, but their right contexts are virtually identical in that they require a noun phrase. This generalization could not be exploited if left and right contexts were not treated separately. Another argument for the two-step derivation is that many words don't have any of the 250 most frequent words as their left or right neighbor.

For example, the abundance of words with a noun-verb ambiguity would create a link between "I didn't Xn • • •" and "the Xn is . . ". One crucial problem in learning syntactic categories is to contextualize occurrences of words. The noun "plant" in "the plant is green" is different from the verb "plant" in "they will plant onions". On the other hand, the patterns "determiner Xn noun" and "adjective Xn noun" are closely linked so that occurrence in one entails acceptability in the other. SYNTACTIC CATEGORIZATION / 19 Acquisition by SD patterns fails in much the same way as Harris' distributional analysis.

They have no similar values on any dimension: where the first vector has a non-zero value, the second vector has a zero value and vice versa. It can be shown that the cosine is equivalent to the normalized correlation coefficient: corr(v, w) = where N is the dimension of the vector space, and vt is component i of vector v. When we use cosine to compare vectors of the type shown in Figures 2 and 3, we effectively compute a measure of the overlap of left neighbors of words. 0, then they have perfect overlap of left neighbors: exactly the same left neighbors.

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Ambiguity Resolution in Language Learning: Computational and Cognitive Models by Hinrich Schütze

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