Báo cáo khoa học: "Smaller Alignment Models for Better Translations: Unsupervised Word Alignment with the 0" potx

... Linguistics Smaller Alignment Models for Better Translations: Unsupervised Word Alignment with the  0 -norm Ashish Vaswani Liang Huang David Chiang University of Southern California Information Sciences ... translation rules. The dominant approach to word alignment has been the IBM models (Brown et al., 1993) together with the HMM model (Vogel et al., 1996)....

Ngày tải lên: 30/03/2014, 17:20

... [1;1], 2The empty words account for the fact that words may not be aligned with other ones, i.e. they are not exphcitely translated for example. 445 • from the source to the empty English word, ... comprises edges from the source to all the English words (including the empty one), edges from all the French words (including the empty one) to the sink, an edge...

Ngày tải lên: 17/03/2014, 07:20

... log-linear models significantly outperform IBM translation models. We begin by describing log-linear models for word alignment. The design of feature functions is discussed then. Next, we present the ... in a given alignment between the source sentence and the target sentence. There- fore, the weight for the provided conventional dic- tionary can be learned. The in...

Ngày tải lên: 31/03/2014, 03:20

... representing the ut- terance onto the stack, before popping the top two elements off the stack and adding the subtree for special-order into the dialog’s subtask tree. 4.2 Start-Complete Method In the ... repre- senting the current utterance onto the stack, then 97 pops the top two tokens off the stack and pushes the non-terminal X; u-complete-X pops the top to- ke...

Ngày tải lên: 22/02/2014, 02:20

... capture the global context information as the topic features for better performing the WSD task. In Boyd-Graber et al. (2007), Latent Dirichlet with WordNet (LDAWN) is developed for simultaneously ... It is therefore not clear whether it can be borrowed to deal with multi-membership here. Among the various applications of topic modeling, maybe the efforts of using to...

Ngày tải lên: 08/03/2014, 00:20

... signif- icantly outperforms the majority sense baseline and performs as well as the state-of -the- art system re- porting results for the same set of verbs. As with the multilingual task, the models produced ... for the disambigua- tion of verbs. We plan to further evaluate our approach for other sets of words, including other parts-of-speech to allow further compari...

Ngày tải lên: 08/03/2014, 02:21

... 1 for the 1-best hypothesis) performs a Viterbi search on the FST 203 and outputs the n-best hypotheses and project C performs a projection of the FST on the output la- bels, in this case the ... many times the hypothesis ranked first by the SCLM is not the closest to the correct concept sequence, i.e. its er- ror rate using the Levenshtein alignment with the manu...

Ngày tải lên: 08/03/2014, 21:20

... the order of the word language model (in Figure 4, n = 2). The stack together with the translated English words comprise a state of the decoder. The last column in the fig- ure shows the rule Markov ... r 2 onto the stack: [ NP @1 VP @2 ] [ Bush] In step 3, we perform a scan operation, in which we append the English word just after the dot to the current hypothe...

Ngày tải lên: 17/03/2014, 00:20

... estimate the pa- rameters of the model. According to the theory of the EM algorithm, we can increase the likelihood of the model with latent variables by iteratively in- creasing the Q-function. The ... dataset). If either of the two words in a pair in the test dataset does not appear in the training dataset, we excluded the pair from the test dataset since the p...

Ngày tải lên: 17/03/2014, 22:20

... frequency, with de- teriorating perform ance for the highest-frequency targets as well as for the lemmas with the highest average paraphrase frequency. Comparison to other models. Many of the other models ... occurs twice in the BNC , once in the sen- tence The dog will gnurge the other dog”, and once in The old windows gnurged”, the exemplar set for gnurge cont...

Ngày tải lên: 30/03/2014, 21:20