Báo cáo khoa học: "SEXTANT: EXPLORING UNEXPLORED CONTEXTS FOR SEMANTIC EXTRACTION FROM SYNTACTIC ANALYSIS" docx

... SEXTANT: EXPLORING UNEXPLORED CONTEXTS FOR SEMANTIC EXTRACTION FROM SYNTACTIC ANALYSIS Gregory Grefenstette Computer Science Department, ... Similarly, our SEXTANT 1 uses fine- grained syntactically derived contexts, but de- rives its measures of similarity from consider- I Semantic EXtraction from Text via Analyzed Net- works of Terms ... encoding of semant...

Ngày tải lên: 31/03/2014, 06:20

... 592–599, Prague, Czech Republic, June 2007. c 2007 Association for Computational Linguistics A Multi-resolution Framework for Information Extraction from Free Text Mstislav Maslennikov and Tat-Seng Chua ... dependency path extraction. The re- sulting system outperforms the previous approaches by 3%, 7%, 4% on MUC4, MUC6 and ACE RDC domains respec- tively. 1 Introduction Informat...

Ngày tải lên: 23/03/2014, 18:20

... interactions from two different data sets. The results show that our approach outperforms most of the previous methods based on syntactic and semantic information. 1 Introduction Information Extraction ... documents. Applications of IE range from Semantic Web to Bioinformatics. For example, there is an increasing interest in automatically extracting relevant information from b...

Ngày tải lên: 31/03/2014, 20:20

... (Fig. 6A,B). TcrPDEC exhibits a K m for cAMP of 31.6 ± 9 lm (N ¼ 6). This is significantly higher than the K m for cAMP observed for a previously characterized PDE from T. cruzi, TcPDE1 [14]. Unexpectedly, ... an unusual PDE from this protozoal organism. This enzyme, TcrPDEC, is a member of the class I PDEs, as determined from the presence of a characteristic signature sequence and...

Ngày tải lên: 19/02/2014, 07:20

... input of the STK. For instance, the STK accepts the syntactic parse: (SBARQ (WHNP (WP What))(SQ (VP (AUX is)(NP (NN autism))))(. ?)). 2.2 Semantic Structures The intuition behind our semantic representation ... query and answer, recent work, e.g. (Shen and Lapata, 2007) has shown that shallow semantic information in the form of predi- cate argument structures (PASs) improves the aut...

Ngày tải lên: 20/02/2014, 09:20

... predicate. The possible semantic roles are pre-defined for each predicate. The set of roles depends on the corpora. SRL is becoming an important tool for infor- mation extraction, text summarization, ... propositions. It adds a semantic layer to the Penn TreeBank (Marcus et al, 1994) and defines a set of semantic roles for each predicate. It is difficult to define universa...

Ngày tải lên: 07/03/2014, 22:20

... that semantic infor- mation, even if minimal, is important for role clas- sification. Surprisingly, the phrasal verb collocation features did not help for any of the tasks, but they were useful for ... only from FS1, and from FS1 and FS2 respectively. When comparing the results obtained for both models when using only features from FS1, we find that almost the same re- sults wer...

Ngày tải lên: 08/03/2014, 04:22

... devel- opment calls for information extraction systems which are as retctrgetable and general as possi- ble. Here, we describe SRV, a learning archi- tecture for information extraction which ... performance with and without such linguistic information. Surprisingly, in many cases, the system performs as well without this information as with it. 1 Introduction The field of...

Ngày tải lên: 08/03/2014, 05:21

... Fig. 2 shows, in succint form, the relevant information from the source bag, i.e. the bag resulting from parsing the source sentence. All the syntactic and semantic information has been omitted ... lexicon was used for content words. Only a bilingual lexi- con for closed class words and a set of bilingual templates were used. Therefore, new bilingual entries were obtained...

Ngày tải lên: 08/03/2014, 06:20

... (morpho- )syntactic relation (adjectives modifying nouns, direct ob- jects of verbs, or English noun-noun compounds). The extraction of such collocations from text cor- pora is usually performed ... differ- ent pre-processing and extraction methods. Our research aims to fill this gap. Currently, we are evaluating methods for the extraction of adjec- tive+noun pairs from German n...

Ngày tải lên: 08/03/2014, 21:20