Báo cáo khoa học: "Using Grammatical Relations to Compare Parsers" pptx
Báo cáo khoa học: "Using Grammatical Relations to Compare Parsers" pptx
... Using Grammatical Relations to Compare ParsersJudita Preiss*Computer LaboratoryUniversity of CambridgeJudita.PreissAcl.cam.ac.ukAbstractWe use the grammatical re-lations ... usefulness of a grammatical relation (GR) evaluation method by using it to compare the performance of four full parsersand a GR finder based on a shallow parser.It is usually difficult to compare perfor-mance ... statis-tical methods to add function tags to PennTreebank I style parses; however, as well asconverting the tags into a Carroll et al. for-mat, we would need to add extra rules to ex-tract other...
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Báo cáo khoa học: "A Grammatical Approach to Understanding Textual Tables using Two-Dimensional SCFGs" docx
... 1078Vancouver Computer 2002 1130Victoria Phone 2001 818Victoria Phone 2002 894Victoria Computer 2001 968Victoria Computer 2002 1024LocationTypeTimeVancouverVictoriaPhoneComputer845107820012002Figure ... presented here aims to address thisproblem. Our model provides an enabling foun-dation toward a linguistic approach by first shift-ing to a two-dimensional CFG framework. Thispermits us to construct ... ways equivalent to the overlay of prosody onspeech Just as prosody undoubtedly contributes to the meaning of utterances, so too does a text’sgraphical presentation contribute to its meaning.However...
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Tài liệu Báo cáo khoa học: "Using Multiple Sources to Construct a Sentiment Sensitive Thesaurus for Cross-Domain Sentiment Classification" doc
... automatic method to createa thesaurus that is sensitive to the sentiment ofwords expressed in different domains.• We describe a method to use the created the-saurus to expand feature vectors ... vector d ∈ RN, where thevalue of the j-th element djis set to the total numberof occurrences of the unigram or bigram wjin thereview d. To find the suitable candidates to expand avector ... thesaurus sensitive to senti-ment. Unlabeled data is cheaper to collect compared to labeled data and is often available in large quan-tities. The use of unlabeled data enables us to ac-curately...
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Tài liệu Báo cáo khoa học: "Using adaptor grammars to identify synergies in the unsupervised acquisition of linguistic structure" docx
... struc-ture. Because of this, less linguistic structure needs to be “built in” to an adaptor grammar compared to acomparable PCFG. For example, the adaptor gram-mars for syllable structure presented in ... them to be stipulated in the grammar.In the unigram syllable adaptor grammar shownin Figure 7, Consonant expands to any consonantand Vowel expands to any vowel. This gram-mar defines a Word to ... tree under the adaptor grammar and the PCFGapproximation.3 Word segmentation with adaptorgrammarsWe now turn to linguistic applications of adap-tor grammars, specifically, to models of unsu-pervised...
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Tài liệu Báo cáo khoa học: "Using linguistic principles to recover empty categories" ppt
... iterate over nodes from top down 2 for each node X 3 try to insert NP* in X 4 try to insert 0 in X 5 try to insert WHNP 0 or WHADVP 0 in X 6 try to insert *U* in X 7 try to insert a VP ellipsis ... ellipsis site in X 8 try to insert S*T* or SBAR in X 9 try to insert trace of topicalized XP in X 10 try to insert trace of extraposition in X 11 for each node X 12 try to insert WH-trace in ... if the task is to insert empty nodes into a tree, then the method leads both to false positives and to false negatives. Suppose for example that the sentence When do you expect to finish? has...
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Tài liệu Báo cáo khoa học: "USING BRACKETED PARSES TO EVALUATE A GRAMMAR CHECKING APPLICATION" ppt
... a more complex approach to evaluat- ing the performance of the system's ability to detect errors. Here, we need to look at both the 1. We use the term critique to represent an instance ... In order to coerce our system into accepting only the desired parse tree, we modified it to ac- cept only parses that satisfied bracketed forms. 6. The BSEC has the capability to report on ... it is to need a fitted parse strategy to handle unex- pected input. The reason for this is that the number of grammatically correct, but 'senseless' parses is large enough to get...
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Báo cáo khoa học: "Using Machine-Learning to Assign Function Labels to Parser Output for Spanish" ppt
... attributed to two main factors. Firstly,the mapping from Cast3LB tags to LFG grammat-ical functions is not one -to- one. For example threeCast3LB tags (CC, MOD and ET) are all mapped to LFG ADJUNCT. ... Cast3LB treebankmake it non-trivial to apply the method of auto-matically mapping c-structures to f-structures usedby Cahill et al. (2004), which assigns grammatical Tag MeaningATR Attribute ... prob-abilistic parser trained on Cast3LB. To our knowl-edge, this paper is the first to describe applyinga data-driven approach to function-tag assignment to a language other than English.Our method...
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Báo cáo khoa học: "Using Similarity Scoring To Improve the Bilingual Dictionary for Word Alignment" doc
... hard and time-consuming task to hand-align bilingual data, the automation of thistask receives a fair amount of attention. In this pa-per, we present an approach to improve the bilin-gual dictionary ... the Compet-itive Linking algorithm (Melamed, 1997) allows foronly up to one link per word. However, this one -to- one/zero -to- one assumption is relaxed by redefiningthe notion of a word.2 Competitive ... we use a greedy bottom-up clus-tering algorithm (Manning and Sch¨utze, 1999) to cluster those words that have high similarity scores.The clustering algorithm is initialized to clus-ters, where...
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Báo cáo khoa học: "A STOCHASTIC APPROACH TO SENTENCE PARSING" pptx
... history of natural language understanding work, semantic and pragmatic constraints are known to be indispensable and are recommended to be represented in some formal way and to be referred to ... A STOCHASTIC APPROACH TO SENTENCE PARSING Tetsunosuke FuJisaki Science Institute, IBM Japan, Ltd. No. 36 Kowa Building 5-19 Sanbancho,Chiyoda-ku Tokyo 102, Japan ABSTRACT ... by [Fu], a stochastic augmentatlon of a given grammar; furthermore, we propose to use the resultant statistics as a device for semantic and pragmatic constraints. Wlthin this stochastic framework,...
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Báo cáo khoa học: "Using WordNet to Automatically Deduce Relations between Words in Noun-Noun Compounds" docx
... relations were therefore added to the list of relations we used. Various other less commonly-occuring relations were also observed. To allowfor these other relations, a function was added to the ... Gagn´e’s set of taxonomic relations. This suggests that the taxonomy needs to be ex-tended by the addition of further relations. In addition to identifying the relations used incompounds ... frequentsenses for both relations. This diversity of rela-tion senses suggests that Gagn´e’s set of thematic relations may be too coarse-grained to capture dis-tinctions between relations. 4 Compound...
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