Báo cáo khoa học: "Training Phrase Translation Models with Leaving-One-Out" ppt

... learn phrase translation probabilities for phrase- based statistical machine translation that go beyond pure counting of phrases in word-aligned training data. Most approaches report problems with ... target phrase. In (Ferrer and Juan, 2009), phrase models are trained by a semi-hidden Markov model. They train a conditional “inverse” phrase model of the target phrase given...

Ngày tải lên: 07/03/2014, 22:20

... framework, real-time is re- quired. 4 Phrase- based models The usual statistical translation models can be classified as single-word based alignment models. Models of this kind assume that an input ... framework (Och et al., 2003). Phrase- based models have proved to be very ad- equate statistical models for MT (Tom ´ as et al., 2005). In this work, the use of these models has...

Ngày tải lên: 20/02/2014, 12:20

... proportional to the lenth of the phrase, causing each translation to have a score compara- ble to the product of the word to word translations within the phrase. 7 HMM Phrase Extraction In order to ... translation model estimate within our decoder. 6 Integration Phrase translation pairs that are generated by the method described in this paper are finally scored with estimates o...

Ngày tải lên: 20/02/2014, 16:20

... IBM2 models, and the phrase table was the union of phrases extracted from these separate alignments, with a length limit of 7. It was filtered to retain the top 20 translations for each source phrase ... heterogeneous translation systems e.g. phrase- based, hierarchical phrase- based, and/or syntax-based systems. This section explains how such models can be combined during the dec...

Ngày tải lên: 19/02/2014, 19:20

... joint translation model which addresses these is- sues and separates hierarchical translation structure from phrase- pair emission. In section 3 we consider a chart over phrase- pair spans filled with ... and phrase- pair segmenting structure of translation, as in Figure 4. Given σ, the phrase- pair emission part merely gener- ates the phrase- pairs utilising distributions from ev-...

Ngày tải lên: 20/02/2014, 04:20

... features of RTER are binary. The remaining two models, MTR and MT+RTER, show clearer benefit from more data. With 20% of the total data, they climb to within 5 points of their final perfor- mance, ... of automatically-extracted paraphrases. These ap- proaches reduce the risk that a good translation is rated poorly due to lexical deviation, but do not address the problem that a translation...

Ngày tải lên: 20/02/2014, 07:20

... The point of showing the equivalence between n- gram models and decision-tree models is to make clear that the power of decision-tree models is not in their expressiveness, but instead in ... SPATTER's models SPATTER consists of three main decision-tree models: a part-of-speech tagging model, a node- extension model, and a node-labeling model. Each of these decision-tree...

Ngày tải lên: 20/02/2014, 22:20

... to model the term translation probabilities. We used a simple k-NN classifier and a basic baseline to evalute the performance. We used the GLSA- based term translation probabilities within the lan- guage ... between the term vec- tors is used as term translation probabil- ity in the language modelling framework. Our experiments demonstrate that GLSA- based term translation probabilitie...

Ngày tải lên: 08/03/2014, 21:20

... work. With Chunking, (Kudo and Matsumoto, 2001) reported the best F-score of 93.91 with the vot- ing of several models trained by Support Vec- tor Machine in the same experimental settings and with ... MCE-F with the MAP parameter initialization achieved an F-score of 94.03, which surpasses the above result without manual parameter tuning. With NER, we cannot make a direct compari...

Ngày tải lên: 17/03/2014, 04:20

... translations of a noun phrase was statistically impor- tant. 3 Construction of Translation Lexicons To construct translation lexicons with regional varia- tions, we propose a transitive translation ... multilingual translation lexicons with regional variations. We propose a transitive translation approach to determine translation variations across languages that have in...

Ngày tải lên: 31/03/2014, 03:20