Báo cáo khoa học: "Minimized Models for Unsupervised Part-of-Speech Tagging" pot

... AFNLP Minimized Models for Unsupervised Part-of-Speech Tagging Sujith Ravi and Kevin Knight University of Southern California Information Sciences Institute Marina del Rey, California 90292 {sravi,knight}@isi.edu Abstract We ... new methods for un- supervised part-of-speech tagging. We adopt the problem formulation of Merialdo (1994), in which we are given a raw word sequence and...

Ngày tải lên: 17/03/2014, 01:20

... Statistical Models for Unsupervised Prepositional Phrase Attachment Adwait Ratnaparkhi Dept. of Computer and Information Science University of Pennsylvania ... Abstract We present several unsupervised statistical models for the prepositional phrase attachment task that approach the accuracy of the best su- pervised methods for this task. Our unsuper- ... trains from raw...

Ngày tải lên: 17/03/2014, 07:20

... Association for Computational Linguistics, pages 495–503, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics Minimized models and grammar-informed initialization for ... uniform transition distributions. We refer to a model learned from basic EM (uni- formly initialized) as EM, and to a model with grammar-informed initialization as EM GI . 4 Minimized...

Ngày tải lên: 07/03/2014, 22:20

... Meeting of the Association for Computational Linguistics, pages 115–119, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics Topic Models for Dynamic Translation ... the most useful notion of domain for better translations. We take a finer-grained, flexible, unsupervised ap- proach for lexical weighting by domain. We induce unsupervised dom...

Ngày tải lên: 19/02/2014, 19:20

... Association for Computational Linguistics Ensemble Methods for Unsupervised WSD Samuel Brody School of Informatics University of Edinburgh s.brody@sms.ed.ac.uk Roberto Navigli Dipartimento di Informatica Universit ` a ... about 27 person-years of human annotation effort. This paper focuses on unsupervised methods which we argue are useful for broad coverage sense disambiguation. Un...

Ngày tải lên: 08/03/2014, 02:21

... for the experiments reported here is the same as the one used for other experiments reported in this paper. The results in Table 3 illustrate how the language model performs reasonably well for ... search- ing for the optimal solution among all possible permu- tations computationally intractable. Therefore, SMT decoders typically limit the number of permutations considered for effici...

Ngày tải lên: 08/03/2014, 02:21

... which helped improve performance. 2.2 Beyond Two-Level Models To this point, we have focused solely on a model for two-level fine-to-coarse sentiment analysis not only for simplicity, but because ... systems. 1.1 Related Work The models in this work fall into the broad class of global structured models, which are typically trained with structured learning algorithms. Hidden Markov mo...

Ngày tải lên: 08/03/2014, 02:21

... language models in the context of speech applications. Grishman (1995) and Hobbs et al. (1995) use phrasal information in information extraction. Alshawi (1996) uses dependency information ... provide a-direct comparison between trigram models for part-of-speech tagging and supertag- ging, in this paper our goal is to improve the per- formance of supertagging using local techniq...

Ngày tải lên: 08/03/2014, 21:20

... in- crease in performance of about 2-3% for most mod- els. For General-LM, results increased by 8-10%. The Poisson and general fertility models show a 2- 5% gain in performance over the basic ... translation probabilities are shown for the unigram and headword models in table 2. The formal language words have captured reason- able English words for their most likely transla-...

Ngày tải lên: 08/03/2014, 21:20

... occur in a variety of word forms. Each word form carries two pieces of information: 1) Lexical content and 2) Morphosyntactic properties. For example, the English word form gave ex- presses the ... citation form, or inflection class of surface word forms in a language. Striv- ing to bypass the time consuming, labor intensive task of constructing a morphological analyzer by hand, uns...

Ngày tải lên: 17/03/2014, 06:20