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 identification Vietnamese ... Wikipedia define concepts or objects to which key phrases refer. The key phrases are extracted from the title of the page. We consider a page has key phrases if it satisfies one of the following...

Báo cáo khoa học: "An HMM-Based Approach to Automatic Phrasing for Mandarin Textto-Speech Synthesis" doc

... 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, method to re-estimate ... conduct searching. Backward and forward search All the definitions described in (Rabiner, 1999) are followed in the present approach. The forward procedure forward variable: )|,()(21λαiqoooPittt==...

Báo cáo khoa học: "An Ontology-based Semantic Tagger for IE system" pot

... 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 thetop-down and bottom-up design approaches (Frid-man and Hafner, 1997). For the former, we usedthe templates ... request for an SARairplane (Aurora) and the use of another SAR airplane (king Air). The words in bold are candidates for theextraction. The tag below each bold chunk is a domain-speciﬁc information...

Báo cáo khoa học: "An Active Learning Approach to Finding Related Terms" docx

... for synonyms,but poorly for groups. Meronyms were difﬁcultacross the board. Neither logistic regression noractive learning always improved performance, butL(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 notexist yet). We then have a row i for every similar-ity entry ... three axes.First, the method for choosing θ : Untrained andLogistic (U and L). Second, the data sources used:each source separately (M for Moby, W for Word-Net, D for distributional similarity),...

Tài liệu Báo cáo khoa học: "Generating Impact-Based Summaries for Scientiﬁc Literature" docx

... 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 performance is ... propose the general languagemodeling approach. In Section 4, we present differ-ent strategies and features for estimating an impactlanguage model, a key challenge in impact summa-rization....

Tài liệu Báo cáo khoa học: "AN INTEGRATED HEURISTIC SCHEME FOR PARTIAL PARSE EVALUATION" docx

... 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- tures. The penalties ... AN INTEGRATED HEURISTIC SCHEME FOR PARTIAL PARSE EVALUATION Alon Lavie School of Computer Science Carnegie Mellon University 5000 Forbes Ave., Pittsburgh, PA 15213 email :...

Báo cáo khoa học: " An NLP Tool Suite for Processing Word Lattices" docx

... The key aspectof the use of MACAON for the LUNA project is theability to perform the linguistic analyses on the mul-tiple hypotheses produced by the ASR system. It istherefore possible, for ... annotation format. Moreover,the MACAON exchange format was deﬁned from thebottom up, originating from the authors’ need to useseveral existing tools and adapt their input/outputformats in order for ... theMACAON exchange format. htk2macaonand fsm2macaon convert word lattices fromthe HTK format (Young, 1994) and ATTFSM format (Mohri et al., 2000) to theMACAON exchange format. macaon2txt...

Tài liệu Báo cáo khoa học: "A Ranking-based Approach to Word Reordering for Statistical Machine Translation" doc

... Association for Computational Linguistics, pages 912–920,Jeju, Republic of Korea, 8-14 July 2012.c2012 Association for Computational LinguisticsA Ranking-based Approach to Word Reordering for Statistical ... thatour approach can bring signiﬁcant improvements tothe baseline phrase- based SMT system in both pre-ordering and integrated decoding settings.In the rest of the paper, we will ﬁrst formallypresent ... −1.83, −1.50, −1.20} for {I, am, trying, play} respectively, we can get asorted list {I, play, trying, am}, which is the desiredpermutation according to the target.More formally, for a tree node...

Tài liệu Báo cáo khoa học: "An Open Source Toolkit for Phrase-based and Syntax-based Machine Translation" docx

... 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 phrase- pairs that ... first extracts a phrase table and two reordering models for the phrase- based system, or a Synchronous Context-free/Tree-substitution Grammar (SCFG/STSG) for the hierarchical phrase- based and...

Tài liệu Báo cáo khoa học: "An ERP-based Brain-Computer Interface for text entry using Rapid Serial Visual Presentation and Language Modeling" ppt

... sequences shown exceeds themaximum value of 6 for 3 of the symbols. Thisoccurs when the speciﬁed letter is mistyped one ormore 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 ofnoninvasive techniques for letter-by-letter ... control sufﬁcient for such an interface. Rely-ing on extensive visual scanning or complex gestu-ral feedback from the user renders a typing interfacedifﬁcult or impossible to use for the most impairedusers....

Xem thêm