Báo cáo khoa học: "A Generalized Vector Space Model for Text Retrieval Based on Semantic Relatedness" pot

... Association for Computational LinguisticsA Generalized Vector Space Model for Text Retrieval Based on Semantic RelatednessGeorge Tsatsaronis and Vicky PanagiotopoulouDepartment of InformaticsAthens ... study conductedin three TREC collections reveals that semantic information can boost text retrieval performance with the use of theproposed GVSM.1 IntroductionThe use of semantic information ... based only on randomly gen-erated pseudowords of varying sizes. Similarly,Voorhees (1993) reported a drop in retrieval per-formance when the retrieval model was based on WSD information. On...

Báo cáo khoa học: "A Joint Rule Selection Model for Hierarchical Phrase-based Translation" pptx

... probability model is factored into four sub-models that canbe further classiﬁed into source-side and target-side rule selection models or context -based andcontext-free selection models. The context -based models ... sub -model is source-side rule se-lection model and the second one is the target-siderule selection model. For the source-side rule selection model, we fur-ther compute it by the interpolation ... Conference Short Papers, pages 6–11,Uppsala, Sweden, 11-16 July 2010.c2010 Association for Computational LinguisticsA Joint Rule Selection Model for Hierarchical Phrase -based Translation∗Lei...

Báo cáo khoa học: "A Generalized-Zero-Preserving Method for Compact Encoding of Concept Lattices" pot

... vectors allows for ef-ﬁcient computation of join operations on the lattice. Join is the central operationany uniﬁcation -based parser must support.We extend the traditional bit vector encod-ing, ... vectors. For comparison, we also tested a simple lookup table.The same implementation sufﬁced for all thesetests, by means of putting all types in one mod-ule for the non-modular bit vectors ... Association for Computational LinguisticsA Generalized- Zero-Preserving Method for Compact Encoding ofConcept LatticesMatthew SkalaSchool of Computer ScienceUniversity of Waterloomskala@cs.toronto.eduVictoria...

Tài liệu Báo cáo khoa học: "A Syntax-Driven Bracketing Model for Phrase-Based Translation" pptx

... Bracketing Model for Phrase -Based TranslationDeyi Xiong, Min Zhang, Aiti Aw and Haizhou LiHuman Language TechnologyInstitute for Infocomm Research1 Fusionopolis Way, #21-01 South Connexis, ... constrains the phrase “航海节”to be translated as a unit.Without considering syntactic constraints fromthe parse tree, the decoder makes wrong decisionsnot only on phrase movement but also on ... within particular syntac-tic contexts (Fox, 2002)2, than that of constituentmatching/violation. Phrase cohesion is one ofthe main reasons that we introduce syntactic con-straints (Cherry, 2008)....

Tài liệu Báo cáo khoa học: "A Uniﬁed Syntactic Model for Parsing Fluent and Disﬂuent Speech∗" ppt

... common inspontaneous speech – one study found 30% of dia-logue turns contained repairs (Carletta et al., 1993)and another study found one repair every 4.8 sec-onds (Blackmer and Mitton, 1991). ... and saves more potential exam-ples of ﬂuent speech rules, and therefore potentiallymakes better use of limited data.3 EvaluationThe evaluation of this system was performed on the Switchboard ... ACL-08: HLT, Short Papers (Companion Volume), pages 105–108,Columbus, Ohio, USA, June 2008.c2008 Association for Computational LinguisticsA Uniﬁed Syntactic Model for Parsing Fluent and Disﬂuent...

Tài liệu Báo cáo khoa học: "A Sentimental Education: Sentiment Analysis Using Subjectivity Summarization Based on Minimum Cuts" doc

... plot descriptions at the beginning rather thanthe end of the text and conclude with overtly opin-ionated statements.4.2 Incorporating context informationThe previous section demonstrated the ... detection. We now examine whethercontext information, particularly regarding sentenceproximity, can further improve subjectivity extrac-tion. As discussed in Section 2.2 and 3, con-textual constraints ... same level of performance for the polarity classiﬁcation task while retainingonly 60% of the reviews’ words. Also, we ex-plore extraction methods based on a minimum cutformulation, which provides...

Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc

... in the context of language generation, while we search for the best alignment on the condition that both trees are given. To facilitate the presentation of the tree align-ment model, the ... the ba-sic feature for alignment. (Kay & Roscheisen 1993; and Chen 1993) used lexical information for sentence alignment. Models combining length and lexicon information were proposed in ... focusing on syntactic tree alignment model for machine translation. For example, (Wu 1997; Alshawi, Bangalore, and Douglas, 2000; Yamada and Knight, 2001) have studied syn-chronous context free...

Báo cáo khoa học: "A Stacked Sub-Word Model for Joint Chinese Word Segmentation and Part-of-Speech Tagging" potx

... oftenprovides important clues for POS tagging, and thePOS tags contain much syntactic information, whichneed context information within a large window for disambiguation. For example, Huang et al. ... contribution ofcontext information for the disambiguation. A ﬁrstorder Max-Margin Markov Networks model is usedto resolve the sequence tagging problem. We use theSVM-HMM3implementation for ... of the Association for Computational Linguistics, pages 1385–1394,Portland, Oregon, June 19-24, 2011.c2011 Association for Computational LinguisticsA Stacked Sub-Word Model for Joint Chinese...

Báo cáo khoa học: "A Language-Independent Unsupervised Model for Morphological Segmentation" pot

... 2006).5.2 Evaluation on Grapheme-to-PhonemeConversionMorphological segmentation is not of value in itself– the question is whether it can help improve results on an application. Performance improvements ... improvements dueto morphological information have been reported for example in MT, information retrieval, and speechrecognition. For the latter task, morphological seg-mentations from the unsupervised ... takes 3 min for the version that does the simple segmentation andabout 8 min for the version that generates all possi-ble segmentations and uses the language model. 5.1 Comparison to other...

Báo cáo khoa học: "A Generative Constituent-Context Model for Improved Grammar Induction" docx

... fromthe conditional model used for induction. Here, weimprove on that model in several ways. First, weconstruct a generative model which utilizes the samefeatures. Then, we extend the model to ... Constituent-Context Model for Improved Grammar InductionDan Klein and Christopher D. ManningComputer Science DepartmentStanford UniversityStanford, CA 94305-9040{klein, manning}@cs.stanford.eduAbstractWe ... felicitous search space. The funda-mental assumption is a much weakened version ofclassic linguistic constituency tests (Radford, 1988):constituents appear in constituent contexts. A par-ticular...

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