Báo cáo khoa học: "Domain Kernels for Word Sense Disambiguation" ppt

... 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 ... state-of-the-art systems for Word Sense Disambiguation (WSD) are de- signed according to a supervised learning frame- work, in which the disambiguation of each word in the lexicon i...

Ngày tải lên: 23/03/2014, 19:20

... using the 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 for measuring ... and using WordNet, form a similarity list for each sense of that word. For this, use the words from the synset of each sense and the words from the hypernym synsets....

Ngày tải lên: 08/03/2014, 06:20

... exploiting paraphrase information for the target senses rather than relying on the structure of WordNet as a whole. Topic models have also been applied to the re- lated task of word sense induction. ... semantic re- lations between senses, etc.). Sometimes such de- tailed information may not be available, for in- stance for languages for which such a resource does not exist or fo...

Ngày tải lên: 23/03/2014, 16:20

... the graph for each target word in the context: for each target word W i , we concentrate the initial proba- bility mass in the senses of the words surrounding W i , but not in the senses of the ... on WordNet) in order to perform unsupervised Word Sense Disam- biguation. Our algorithm uses the full graph of the LKB efficiently, performing better than previous approaches in English...

Ngày tải lên: 31/03/2014, 20:20

... kernel for phrase grammar parse trees and for depen- dency parse trees outperforms all known tree kernel approaches alone suggesting that both types of trees contain comple- mentary information for ... (2003) and Culotta and Sorensen (2004) proposed kernels for dependency trees (DTs) inspired by string kernels. Zhang et al. (2006) suggested a kernel for phrase grammar parse trees...

Ngày tải lên: 20/02/2014, 09:20

... 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

... same pre- processng for all words, the training words and the OOV words. And the resulting feature vectors for each word are used for learning the CCA projections Since a word can have multiple ... project all the words into the sub-space identified by CCA and mine translations for the OOV words. We will describe each of these steps in detail in this section. For each of the freq...

Ngày tải lên: 17/03/2014, 00:20

... 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 ... Log- linear Models for Word Alignment In Proceedings of the 43rd Annual Meeting of the ACL. Ann Arbor, Michigan. USA. Robert C. Moore. 2005. A Discriminative Framework for Word Alig...

Ngày tải lên: 23/03/2014, 16:20

... jeopardise. R: we will therefore vote for the amendments facilitating its use. C: in this sense, we will vote in favour of the amendments which, in order to increase the use of. B: in this sense we vote in ... syntactic information. It appears likely that syntactic information will be crucial in accu- rately modeling many phenomena during transla- tion, for example systematic differenc...

Ngày tải lên: 20/02/2014, 15:20