Báo cáo khoa học: "Semi-Supervised Semantic Role Labeling" potx

... generative model for unsupervised semantic role induction, which integrates local role assignment deci- sions and a global role ordering decision in a unified model. The role sequence is divided into ... syntactic and semantic features could provide clues to the semantic role label of a constituent, non- local features such as predicate voice could provide information about the...

Ngày tải lên: 19/02/2014, 19:20

... 3 A Simple Semantic Role Labeler To explore issues surrounding the generalization of semantic role annotations across verbs, we began by authoring a simple automated semantic role la- beling ... Figure 2. Performance of our semantic role label- ing approach on PropBank rolesets 4 Identifying Syntactically Similar Verbs A key part of generalizing semantic role annota-...

Ngày tải lên: 23/03/2014, 18:20

... un- supervised semantic role labeling. Following com- mon practice, our system proceeds in two stages. It first identifies the semantic arguments of a pred- icate and then assigns semantic roles to them. ... (argument identification) and labeling them with semantic roles (role induction). In our case neither argument identification nor role induction relies on role- annotated data...

Ngày tải lên: 30/03/2014, 21:20

... plausibility judgements for verb -role- argument triples and introduce a probabilistic model that solves it. We also evaluate our model on the related role- labelling task, and com- pare it with a standard role labeller. ... roles incrementally as soon as a predicate- argument pair is seen. It uses the likelihood of the- matic role assignments to model human interpre- tation of verb-argu...

Ngày tải lên: 31/03/2014, 20:20

... regulation and is regulated differently from cyclin A, B-Myb or Cdc2. The DREAM complex: a possible role in CDE/CHR-dependent regulation E2F4 and the pocket protein p107 have been shown, in vitro ... 5¢-TTTGAA-3¢. However, this sequence appears too frequently in promoters to clearly indicate a CHR with a role in cell cycle-depen- dent transcriptional repression (Table 2). Therefore, this...

Ngày tải lên: 16/02/2014, 09:20

... sufficient to discriminate between forward entailment and semantic equivalence. To cope with these issues, we explore the contribution of syntactic and semantic features as a complement to lexical ones ... entries, our model builds on two additional feature sets, derived from i) semantic phrase tables, and ii) dependency relations. Semantic Phrase Table (SPT) matching repre- sents a no...

Ngày tải lên: 19/02/2014, 19:20

... mitochondria play a key role in the execution of apoptosis, which is separate from the caspase pathway mentioned above. By analogy, it is reasonable to assume that mitochondria play a key role in PND in Tetrahymena. ... in Tetrahymena. Comp Biochem Physiol C 122, 215–224. 26 Jaso-Friedmann L, Leary JH III & Evans DL (2000) Role of nonspecific cytotoxic cells in the induction of progr...

Ngày tải lên: 20/02/2014, 03:20

... preferred semantic class that fills a certain relation role, as x or y) can be exploited to ontologize the instance. In the following sections, we propose two al- gorithms for ontologizing binary semantic ... complex lexi- cal structures like binary semantic relations, the paper focused only on attaching terms. Basili (2000) proposed an unsupervised method to infer semantic cla...

Ngày tải lên: 20/02/2014, 12:20

... related semantic classes • Demonstration that dependency parser paths are inadequate for semantic classification into 7 WordNet classes on TREC news corpora • A benchmark of 10-class semantic ... se- mantic type. We show that the techniques used to perform binary semantic classification do not work as well when extended to a full n-way semantic classifi- cation. We show that using a va...

Ngày tải lên: 20/02/2014, 12:20

... re- garded the difference of two association strengths as a measure of semantic orientation. They also pro- posed to use Latent Semantic Analysis to compute the association strength with seed words. ... adjectives. Kobayashi et al. (2001) proposed a method for ex- tracting semantic orientations of words with boot- strapping. The semantic orientation of a word is determined on the basi...

Ngày tải lên: 20/02/2014, 15:20