Báo cáo khoa học: "An Unsupervised Approach to Prepositional Phrase Attachment using Contextually Similar Words" potx

... An Unsupervised Approach to Prepositional Phrase Attachment using Contextually Similar WordsPatrick Pantel and Dekang LinDepartment of Computing ScienceUniversity of Alberta1Edmonton, ... Manitoba.Abstract Prepositional phrase attachment is acommon source of ambiguity in naturallanguage processing. We present an unsupervised corpus-based approach to prepositional phrase attachment ... unsupervised corpus-based approach to prepositional phrase attachment that outperforms previous unsupervised techniques and approaches theperformance of supervised methods. Unlikeprevious unsupervised...

Báo cáo khoa học: "A Connectionist Approach to Prepositional Phrase Attachment for Real World Texts" docx

... network-based approach to prepositional phrase attachment disam- biguation for real world texts. Although the use of semantic classes in this task seems intuitively to be adequate, methods employed to ... A Connectionist Approach to Prepositional Phrase Attachment for Real World Texts Josep M. Sopena and Agusti LLoberas and Joan L. Moliner Laboratory of Neurocomputing University ... suffice to make an assignment decision. Prepositional phrase (PP) attachment is, perhaps, the canonical case of structural ambiguity. What kind of information should we use in order to solve...

Tài liệu Báo cáo khoa học: "An Unsupervised Approach to Recognizing Discourse Relations" pdf

... us access to general purpose knowledgebases that assert that similar( libya,rwanda)”.The approach we advocate in this paper is in somerespects less ambitious than current approaches to discourse ... word pairs that are not likely to be good predictorsof discourse relations. To test this hypothesis, we decided to carry outa second experiment that used as predictors onlya subset of the word ... of lexical itemsare likely to co-occur in conjunction with each dis-course relation and a means to apply the learned pa-rameters to any pair of text spans in order to deter-mine the discourse...

Tài liệu Báo cáo khoa học: "AN ECLECTIC APPROACH TO BUILDING NATURAL LANGUAGE INTERFACES" pptx

... instruction to start using INGLISH. Ini- tially there is a preference to tt~ the mouse to explore the cov- erage and then to begin to incorporate some typing. We have not had any long-term use~ to ... In-line help is available. To assist the v/pist, automatic spelling correction, word completion, and automatic phrase completion are provided. INGLISH constrains users to create statements within ... refers to the parent node and t to the node to which the schema is attached. The final phase of INKA interprets the f-structures to produce Pmlog clauses. All of the information required to produce...

Báo cáo khoa học: "An Adaptive Approach to Collecting Multimodal Input" doc

... 18% longer time to issue than multimodal com-mands, implying multimodal input is faster. For example, it is easier to point to a location on a map using touch than using speech to describe it. ... integrated and sent to the DM. This is similar to Johnston et. al. (2002) who uses a 1 second wait period. 2. Two Inputs - In this method, multimodal input is assumed to consist of two inputs ... modali-ties, and then respond to a joint interpreta-tion. We performed a study to understand the variability of input in multimodal dia-logue systems and to evaluate methods to perform the collection...

Tài liệu Báo cáo khoa học: "An Unsupervised Model for Joint Phrase Alignment and Extraction" ppt

... phrases lead to spar-sity, we set λ to a relatively small value to allowus to bias against overly long phrases4. Pm1is theword-based Model 1 (Brown et al., 1993) probabil-ity of one phrase ... larger phrase table.We also evaluated the effectiveness of model-based phrase extraction compared to heuristic phrase extraction. Using the alignments from HIER, we cre-ated phrase tables using ... generates leaves using the phrase distribution Pt, HIER ﬁrst attempts to generate thefull sentence as a single phrase from Pt, then fallsback to ITG-style derivations to cope with sparsity.We...

Tài liệu Báo cáo khoa học: "A Bootstrapping Approach to Named Entity Classification Using Successive Learners" pdf

... seeds are retrieved from the repository to train a decision list for NE classification. 3. The learned rules are applied to the NE candidates stored in the repository. 4. The proper names tagged ... 86.7% To benchmark the quality of the automatically constructed corpus (Table 2), the testing corpus is first processed by our parser and then saved into the repository. The repository level ... limited recall. Then, these rules are applied to a large raw corpus to automatically generate a tagged corpus. Finally, an HMM-based NE tagger is trained using this corpus. There is no iterative...

Báo cáo khoa học: "A new Approach to Improving Multilingual Summarization using a Genetic Algorithm" pptx

... O Overlap similarity6 to the title: sim(S, T ) =|S∩T |min{|S|,|T |}(Edmundson, 1969)TITLE J Jaccard similarity to the title: sim(S, T ) =|S∩T ||S∪T |TITLE C Cosine similarity to the title: ... op-eration.3http://www.extractor.com/928Today, graph-based text representations are be-coming increasingly popular, due to their abil-ity to enrich the document model with syntacticand semantic relations. Salton ... parame-ters for a keyword extractor embedded in the Ex-tractor tool.3Or˘asan et al. (2000) enhanced thepreference-based anaphora resolution algorithmsby using a GA to ﬁnd an optimal set of values...

Báo cáo khoa học: "A Grammatical Approach to Understanding Textual Tables using Two-Dimensional SCFGs" docx

... 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 ... 1078Vancouver Computer 2002 1130Victoria Phone 2001 818Victoria Phone 2002 894Victoria Computer 2001 968Victoria Computer 2002 1024LocationTypeTimeVancouverVictoriaPhoneComputer845107820012002Figure ... 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...

Báo cáo khoa học: "A Probabilistic Approach to Syntax-based Reordering for Statistical Machine Translation" potx

... then fed to stan-dard phrase- based decoder to produce theoptimal translation. Experiments show that,for the NIST MT-05 task of Chinese -to- English translation, the proposal leads to BLEU improvement ... IntroductionThe phrase- based approach has been considered thedefault strategy to Statistical Machine Translation(SMT) in recent years. It is widely known that the phrase- based approach is powerful ... this approach achieves the best result within certain distortion limitand is therefore not a good model for global reorder-ing.There are a few attempts to the preprocessing approach to reordering....

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