Báo cáo khoa học: "Forest-based Tree Sequence to String Translation Model" ppt

... 1) TT2S: tree- based tree- to- string model by setting the forest pruning threshold to 1 best and the number of sub-trees in a tree sequence to 1. 2) TTS2S: tree- based tree- sequence to string system ... 6. A tree sequence to string rule 174 A tree- sequence to string translation rule in a forest is a triple <L, R, A>, where L is the tree...

Ngày tải lên: 23/03/2014, 16:21

... BLEU Japanese -to- English 0.6998 English -to- Japanese 0.7496 Japanese -to- Chinese 0.6584 Chinese -to- Japanese 0.7400 English -to- Chinese 0.5520 Chinese -to- English 0.6581 Table 2 Mechanical evaluation of translation 5 ... ABC Japanese -to- English 78.4 86.3 92.2 English -to- Japanese 74.3 85.7 93.9 Japanese -to- Chinese 68.0 78.0 88.8 Chinese -to- Japanese 68.6 80.4 89.0 English -...

Ngày tải lên: 31/03/2014, 01:20

... spaces. To address the above problems, Liu et al. (2007) propose to use forest -to- string rules to enhance the expressive power of their tree- to- string model. As is inherent in a tree- to- string ... phrases translations. 3.2 Tree Sequence Translation Model Given the source and target sentences 1 J f and 1 I e and their parse trees 1 () J Tf and 1 () I Te , th...

Ngày tải lên: 17/03/2014, 02:20

... that there are two ways to apply this information. The first is to simply correct the term to conform to the norms as defined by the authors in K. The second approach is to incorpo- rate characteristic ... discriminators, but it also means that we do not have a threshold value to drive the feature adjustment process. Token DTR Frequency Token DTR Frequency the...

Ngày tải lên: 20/02/2014, 12:20

... the tree, on each pass applying a different set of rules. 1 for each tree, iterate over nodes from top down 2 for each node X 3 try to insert NP* in X 4 try to insert 0 in X 5 try to insert ... WHADVP 0 in X 6 try to insert *U* in X 7 try to insert a VP ellipsis site in X 8 try to insert S*T* or SBAR in X 9 try to insert trace of topicalized XP in X 10 try to in...

Ngày tải lên: 20/02/2014, 16:20

... descriptions to sketches: a model for a text -to- image translator Lidia Fraczak LIMSI-CNRS, b£t. 508, BP 133 91403 Orsay cedex, France fraczak@limsi.fr Abstract This paper deals with the automatic ... descriptions into graphic sketches. We discuss some general prob- lems implied by such inter-mode transcrip- tion. We propose a model for an automatic text -to- image translator wi...

Ngày tải lên: 08/03/2014, 07:20

... of expert labour to modify for a new extraction task. One approach to this problem is to use machine learning to automatically learn the domain-specific information required to port a sys- tem ... simi- lar meanings to those already identified as relevant. Patterns are compared using a variation of the standard vector space model in which information from an on- tology is used to...

Ngày tải lên: 23/03/2014, 19:20

... as the root node. The tree in Figure 2 is an auxiliary tree. The adjoining operation essentially inserts an auxiliary tree into another tree. For instance, the tree in Figure 5 is the ... is intended to capture. Going back to our example, in combining trees in the subregions with the tree chosen in the initial region rl, the agent tree would be combined with the...

Ngày tải lên: 31/03/2014, 06:20

... rule extraction algo- rithm directly learns tree- to- string rules from aligned Treebank-style trees. As tree- to- string translation casts decoding as a tree parsing problem rather than parsing, the ... derived tree using tree- to- string rules that allow for both substitution and adjoining. We describe how to convert TAG derivations to translation forest (Sec- tion 4...

Ngày tải lên: 07/03/2014, 22:20

... However, while string -to -tree and tree- to- string models demonstrate promising re- sults in empirical evaluations, tree- to -tree models have still been underachieving. We believe that tree- to -tree models ... de- veloped for the tree- to- string case, it is possible to extend GHKM to extract all valid tree- to -tree rules from aligned packed forests. In this s...

Ngày tải lên: 23/03/2014, 16:21