Báo cáo khoa học: "Edit Tree Distance alignments for Semantic Role Labelling" ppt

... data; Adapt the trees for the tree distance algorithm; foreach sentence (training & testing data) do obtain each minimal sub -tree for each pre- dicate; end foreach sub -tree T from the ... pages 79–84, Uppsala, Sweden, 13 July 2010. c 2010 Association for Computational Linguistics Edit Tree Distance alignments for Semantic Role Labelling Hector-Hugo Franco-...

Ngày tải lên: 07/03/2014, 22:20

... framework of lexicon induction. 3.1 Levenshtein Distance One of the simplest string distance measures is the Levenshtein distance. According to it, the distance between two words is defined as the ... language fam- ily (for example, Portuguese) by using a resource- 55 rich bridge language of the same family (for ex- ample, Spanish). While they rely on existing translation lexicons fo...

Ngày tải lên: 20/02/2014, 12:20

... a cat PP IN A subtree Figure 1: A syntactic parse tree. We define as a subtree (ST) any node of a tree along with all its descendants. For example, the line in Figure 1 circles the subtree rooted in ... selected for the Automatic Labeling of Semantic Roles task of Senseval 3 (www.senseval.org). We mapped to- gether the semantic roles having the same name and we considered only the...

Ngày tải lên: 08/03/2014, 21:20

... paper, we formulate ex- tractive summarization as a two step learn- ing problem building a generative model for pattern discovery and a regression model for inference. We calculate scores for sentences ... hierarchical topic tree. The following is the generative process for sumHLDA used in our HybHSum : (1) For each topic k ∈ T , sample a distribution β k  Dirichlet(η). (2) For...

Ngày tải lên: 20/02/2014, 04:20

... val- ues. sive phrase structure trees using the tree transforms in Schuler et al. (2010). Constituent nontermi- nals in right-corner transformed trees take the form of incomplete constituents ... category for input “meets the”. A sample phrase structure tree is shown before and after the right-corner transform in Figures 2 and 3. Our parser operates over a right-corner trans- formed pro...

Ngày tải lên: 20/02/2014, 04:20

... data of 88% F-measure for in- dividual semantic roles, and 69% F-measure for whole scenario-like semantic frames. Recently, Wu and Fung (2009a; 2009b) also show that semantic roles help in statistical ... A1 subject and an A0 indirect object. We therefore transfer semantic roles cross- lingually based only on lexical alignments and add syntactic information after transfer. In Fi...

Ngày tải lên: 20/02/2014, 04:20

... unacceptable. From the sentences for which rules were applica- ble, we randomly selected a sample of sentences for each annotator, allowing for some overlap- ping for agreement analysis. In total, ... corresponding target phrase for the unknown term. We propose using monolingual paraphrasing methods and resources for this task to obtain a more extensive set of rules for paraphra...

Ngày tải lên: 20/02/2014, 07:20

... pairs (ε → w j ) Figure 3: Feature templates of semantic role labeling, the parse tree path im- proves the classification performance of semantic role labeling. Finally, we use the trigger pairs ... features, then we cannot model long -distance dependencies. Thus, we should incorporate non-local infor- mation into the model. For example, figure 1 shows the long -distance dependenc...

Ngày tải lên: 20/02/2014, 12:20

... June 2005. c 2005 Association for Computational Linguistics A Phonotactic Language Model for Spoken Language Identification Haizhou Li and Bin Ma Institute for Infocomm Research Singapore ... to extracted information from acous- tic model and n-gram LM for language l. We have and {, AM } L LM lll λλλ = ( 1, , ) l l λ ∈Λ = . A maxi- mum-likelihood classifier can be formulated a...

Ngày tải lên: 20/02/2014, 15:20

... blocks for for which . 560 4 Online Training of Maximum-entropy Model The local model described in Section 3 leads to the fol- lowing abstract maximum entropy training formulation: (8) In this formulation, ... corresponding to la- bel . The symbol is short-hand for the feature- vector . This formulation is slightly differ- ent from the standard maximum entropy formulation typ- ically enco...

Ngày tải lên: 20/02/2014, 15:20