Báo cáo khoa học: "An Ontology–Based Approach for Key Phrase Extraction" docx

... examined the im- pacts of strategies chosen for Vietnamese key phrase extracting. 1 Introduction Key phrases, which can be single keywords or multiword key terms, are linguistic descriptors of ... nu- Figure 1. The general Vietnamese key phrase extraction model. Key phrases Patterns Ontology ViO &ViDic Key phrases extraction Candidate phrases identif i c...

Ngày tải lên: 08/03/2014, 01:20

... λ =(A,B, π ). Here, we define our prosodic positions for a word to apply the HMM as follows. 0 phrase- initial 1 phrase- medial 2 phrase- final 3 separate This means that Q can be represented ... Sentence length 978 known way so far for maximizing the probability of the observation sequence in a closed form. In the present approach, a straightforward, reasonable yet,...

Ngày tải lên: 17/03/2014, 04:20

... pro- cess are noun phrases NP, proposition phrases PP, verb phrases VP, adjectives ADJ and adverbs ADV. To gather these candidates we used the Brill trans- formational tagger (Brill, 1992) for the part-of- speech ... templates given by the DREV for the de- sign of the ontology. We used a combination of the top-down and bottom-up design approaches (Frid- man and Hafner, 1997). For the fo...

Ngày tải lên: 23/03/2014, 19:20

... for synonyms, but poorly for groups. Meronyms were difficult across the board. Neither logistic regression nor active learning always improved performance, but L(MWD,+) performs near the top for ... is in the similarity en- try for “cat,” we add “cat” to the similarity entry for “dog” (creating an entry for “dog” if it does not exist yet). We then have a row i for every similar-...

Ngày tải lên: 30/03/2014, 21:20

... citation context and then for each extracted sentence find a similar one in the original pa- per. Unfortunately, we did not have time to test this approach before the deadline for the camera-ready ... sen- sitivity of performance to these parameters. In gen- eral, for a wide range of values of these parameters, the performance is relatively stable and near opti- mal. Specifically, the p...

Ngày tải lên: 20/02/2014, 09:20

... within them. In cases where one phrase has more skipped words than the other, the phrase with more skipped words is discarded in favor of the more complete parsed phrase. This operation significantly ... fea- tures are designed to be general and, for the most part, grammar and domain independent. For each parse, the heuristic computes a penalty score for each of the fea- tur...

Ngày tải lên: 20/02/2014, 21:20

... The key aspect of the use of MACAON for the LUNA project is the ability to perform the linguistic analyses on the mul- tiple hypotheses produced by the ASR system. It is therefore possible, for ... annotation format. Moreover, the MACAON exchange format was defined from the bottom up, originating from the authors’ need to use several existing tools and adapt their input/output formats in...

Ngày tải lên: 07/03/2014, 22:20

... Association for Computational Linguistics, pages 912–920, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics A Ranking-based Approach to Word Reordering for Statistical ... that our approach can bring significant improvements to the baseline phrase- based SMT system in both pre- ordering and integrated decoding settings. In the rest of the pap...

Ngày tải lên: 19/02/2014, 19:20

... BLEU4. For the phrase- based system, phrases are of at most 7 words on either source or target-side. For the hierarchical phrase- based system, all SCFG rules have at most two variables. For the ... the toolkit. 3.1 Phrase Extraction and Reordering Model We use a standard way to implement the phrase extraction module for the phrase- based model. That is, we extract all...

Ngày tải lên: 19/02/2014, 20:20

... sequences shown exceeds the maximum value of 6 for 3 of the symbols. This occurs when the specified letter is mistyped one or more times. For example, for each mistyped non- backspace symbol, a backspace ... selection of letters for expressive language gen- eration (Wolpaw, 2007; Pfurtscheller et al., 2000; Treder and Blankertz, 2010). However, the use of noninvasive techniques for l...

Ngày tải lên: 20/02/2014, 05:20