Báo cáo khoa học: "Hierarchical Search for Word Alignment" ppt

... worse to align two English words at different ends of the tree to the same foreign word, than it is to align two English words under the same NP to the same foreign word. To see why a string distance ... apply them to word alignment. Using a foreign string and an English parse tree as input, we formulate a bottom-up search on the parse tree, with the structure of the tree as a backbone...

Ngày tải lên: 23/03/2014, 16:20

... mechanism to aug- ment one source word into several source words or delete a source word, while a NULL insertion is a mechanism of generating several words from blank words. Fertility uses a conditional ... score S W B,X for each pair of sentences where X is 4, 3, 2, and 1 for word- based MT decoder. Step 3: Train phrase-based MT for full parallel corpus. Note that we do not need to...

Ngày tải lên: 08/03/2014, 01:20

... source language word per row and one target language word per column. The cells inside the matrix can be filled with the combined clue values for the correspond- ing word pairs. Henceforth, this ... 0.86 0 The matrix is simply filled with all values of combined clues for each word pair. For ex- ample, the total clue value for the word pair s ="baggage" and t =&qu...

Ngày tải lên: 08/03/2014, 21:20

... 2010 Student Research Workshop, pages 31–36, Uppsala, Sweden, 13 July 2010. c 2010 Association for Computational Linguistics Unsupervised Search for The Optimal Segmentation for Statistical Machine ... is performed including the newly added fractional counts. 3.2 Parallelization of search In an iteration of the algorithm, all words are pro- cessed in random order, computing for e...

Ngày tải lên: 20/02/2014, 04:20

... word PROCEDURE: STEP 1. Form a similarity list ]or each sense of one of the words. Pick one of the words, say W2, and using WordNet, form a similarity list for each sense of that word. For ... senses pro- vided in WordNet. The senses are ranked us- ing two sources of information: (1) the Inter- net for gathering statistics for word- word co- occurrences and (2)WordNet fo...

Ngày tải lên: 08/03/2014, 06:20

... not relevant for the subsequent exposition. For further details, see (Och et al., 1999). 5 Word Hypotheses Graphs A word hypotheses graph is a directed acyclic graph G = (V, E). It is a subset of the search graph ... is not part of the word hypotheses graph. To avoid this prob- lem, we perform a tolerant search in the word hy- potheses graph. We select the set of nodes that...

Ngày tải lên: 08/03/2014, 21:20

... domain to improve word alignments for general words and the corpus in the specific domain for domain-specific words. In other words, we will adapt the word alignment information in the general ... target words for the English word i, we add this link into . WA d) Otherwise, if there are two different links for this word: one target is a single word, and the other targe...

Ngày tải lên: 17/03/2014, 06:20

... de- tailed information may not be available, for in- stance for languages for which such a resource does not exist or for expressions that are not very well covered in WordNet, such as idioms. For those ... general language model for information retrieval (poster abstract). In Re- search and Development in Information Retrieval, 279–280. P. Sorg, P. Cimiano. 2008. Cross-lingual...

Ngày tải lên: 23/03/2014, 16:20

... of the text in which the word is located is a crucial information for WSD. For example the (domain) polysemy among the COM- PUTER SCIENCE and the MEDICINE senses of the word virus can be solved ... This methodology is called word expert approach (Small, 1980; Yarowsky and Florian, 2002). However this is clearly unfeasible for all-words WSD tasks, in which all the words of an open...

Ngày tải lên: 23/03/2014, 19:20

... parental SNARE proteins for SNARE complex formation, inhibiting SNARE assembly. In an initial attempt to search for the potent peptide sequences that inhibit SNARE complex forma- tion and neurotransmitter ... they did not reduce SNARE complex formation much. By contrast, these peptides inhibited SNARE complex for- mation very efficiently when added before preincuba- tion. Therefore, N-...

Ngày tải lên: 30/03/2014, 04:20