Báo cáo khoa học: "Phrase Chunking using Entropy Guided Transformation Learning" docx

... remarks. 2 Entropy Guided Transformation Learning Entropy Guided Transformation Learning (ETL) is a new machine learning strategy that com- bines the advantages of Decision Trees (DT) and Transformation- Based ... chunking task using Entropy Guided Transformation Learning (ETL). We carry out experiments with four phrase chunking tasks: Portuguese noun phrase chunking...

Ngày tải lên: 23/03/2014, 17:20

... Text Chunking using Regularized Winnow Tong Zhang and Fred Damerau and David Johnson IBM T.J. Watson Research ... Buchholz, 2000), which is publicly available from http://lcg- www.uia.ac.be/conll2000 /chunking. An advan- tage of using this dataset is that a large number of state of the art statistical natural ... that the algorithm is suitable for NLP tasks with large feature spaces. 3...

Ngày tải lên: 31/03/2014, 04:20

... INFORMATION RETRIEVAL USING ROBUST NATURAL LANGUAGE PROCESSING Tomek Strzalkowski and Barbara Vauthey1" Courant ... user's query, and rank these documents according to relevance. This has been usually accomplished using statistical methods (often coupled with manual encoding), but it is now widely believed ... the skip-and-fit mode. The result of this strategy is an appro...

Ngày tải lên: 20/02/2014, 21:20

... system is constructed using paired comparable texts. The comparable texts are about the same or related topics, but are not, in general, translations of each other. Using this data, the transliteration ... transliteration is performed using the following steps: 1) Generation of the pronunciation for English words and target words: a. Pronunciations for English words are obtained...

Ngày tải lên: 17/03/2014, 04:20

... using boosting. Com- puter Speech and Language, 16(3-4), 2002. M. White, R. Rajkumar, and S. Martin. Towards broad cov- erage surface realization with CCG. In Proceedings of the Workshop on Using ... trainable language generation has focused on two paradigms: (a) using a statistical model to rank a set of generated utterances, or (b) using statistics to inform the generation deci- sio...

Ngày tải lên: 17/03/2014, 00:20

... proteins were collected onto glass fiber filters using a cell harvester, washed with 5% trichloroacetic acid (w/v), and radioactivity was counted using a liquid scintil- lation counter. Background ... was determined by UV spectroscopy, using an extinction coefficient of 10 280 M )1 Æcm )1 [22]. AAP concentrations were also determined spectrophotometri- cally using an extinction coefficien...

Ngày tải lên: 19/02/2014, 12:20

... expressed using different wording (Xue et al., 2008). To solve the lexical gap problem, most researchers regarded the question retrieval task as a statistical machine translation problem by using ... T (q, D, A) = logP (q|D), where P (q|D) is computed using equations (12) to (15), and the phrase translation probability P (w|t) is estimated using equation (17). • Inverted Phrase transl...

Ngày tải lên: 20/02/2014, 04:20

... star marks corresponds to using beam-search with different pruning thresholds, which result in different processing times and performances. The cross corresponds to using the exact-TSP decoder ... re- duced to STSP, and therefore solved by STSP al- gorithms. 3.1 Reductions AGTSP→ATSP→STSP The transformation of the AGTSP into the ATSP, introduced by (Noon and Bean, 1993)), is illus- trat...

Ngày tải lên: 20/02/2014, 07:20

... 1999), using a polynomial kernel with degree 4 and additive term 1. As a baseline, we trained and tested a model using only the lexical-matching features. We then trained and tested models using ... 10598 {dbikel,vittorio}@us.ibm.com Abstract This paper describes a novel event-matching strategy using features obtained from the tran- sitive closure of dependency relations. The method y...

Ngày tải lên: 20/02/2014, 09:20

... original sentence order (OSO). We also mea- sure the quality of the proposed documents using TAU and BLEU, using as reference the OSO. In Table 1, we report the performance of four search algorithms. ... non-hierarchical representations of discourse, and can be trained with minimal human intervention, using large col- lections of existing human-authored documents. These models are attra...

Ngày tải lên: 20/02/2014, 12:20