Báo cáo khoa học: "Biographies, Bollywood, Boom-boxes and Blenders: Domain Adaptation for Sentiment Classiﬁcation" potx

... Association for Computational LinguisticsBiographies, Bollywood, Boom-boxes and Blenders: Domain Adaptation for Sentiment ClassiﬁcationJohn Blitzer Mark DredzeDepartment of Computer and Information ... trained without adaptation, while thegold standard is an in -domain classiﬁer trained onthe same domain as it is tested.Figure 1 gives accuracies for all pairs of domain adaptation. The domains are ... workto our method for selecting pivots as SCL-MI.3 Dataset and BaselineWe constructed a new dataset for sentiment domain adaptation by selecting Amazon product reviews for four different product...

Báo cáo khoa học: "A Non-negative Matrix Tri-factorization Approach to Sentiment Classiﬁcation with Lexical Prior Knowledge" potx

... un-available and therefore information gain cannotbe practically computed. Figure 3 and Figure 4show results for Lotus and Amazon datasets re-spectively and are representative of performanceon ... sen-timent, and (G0)i2= 1 for negative sentiment. Aswith F0, one can also use soft sentiment labeling for documents, though our experiments are con-ducted with hard assignments.Therefore, ... our models have made no demands on hu-man effort, other than unsupervised collection ofthe term-document matrix and a one-time effort incompiling a domain- independent sentiment lexi-con. We...

... alignment and consistency (Picker-ing and Garrod, 2004; Halliday and Hasan, 1976) onthe one hand, and variation (to improve text quality and readability) on the other hand (Belz and Reiter,2006; ... consis-tency (Halliday and Hasan, 1976), and variation,which inﬂuence people’s assessment of discourse(Levelt and Kelter, 1982) and generated output (Belz and Reiter, 2006; Foster and Oberlander, 2006).Also, ... can be obtained for any domain for whichcorpus data is available, it generalises to new do-mains with limited effort and reduced development654Utterancestring=“turn around and go out”, time=‘20:54:55’Utterancetypecontent=‘orientation,destination’...

Báo cáo khoa học: "Combining EM Training and the MDL Principle for an Automatic Verb Classiﬁcation incorporating Selectional Preferences" pot

... Figure 2. Both for 10 and 20 frames, the results are better for 50 than for 20 clusters, with small differences between 10 and 20 frames. The results vary between -11.850 and -10.620 (for 5-50 iterations), ... classiﬁcations. For example, Siegel and McKeown (2000) used several machine learn-ing algorithms to perform an automatic aspectualclassiﬁcation of English verbs into event and sta-tive verbs. Merlo and ... Ourmodel is potentially useful for lexical induction(e.g., verb senses, subcategorisation and selectionalpreferences, collocations, and verb alternations),496 and for NLP applications in sparse...

Báo cáo khoa học: "Test Collection Selection and Gold Standard Generation for a Multiply-Annotated Opinion Corpus" potx

... the ACL 2007 Demo and Poster Sessions, pages 89–92,Prague, June 2007.c2007 Association for Computational LinguisticsTest Collection Selection and Gold Standard Generation for a Multiply-Annotated ... Introduction Opinion information processing has been studied for several years. Researchers extracted opinions from words, sentences, and documents, and both rule-based and statistical models ... collec-tions and their gold standards which agree mostly to annotators. Therefore, we analyze the kappa value not between annotators, but between the an-notator and the gold standard. The methodologies...

Báo cáo khoa học: Proteoglycans in health and disease: new concepts for heparanase function in tumor progression and metastasis pptx

... health and disease: new concepts for heparanase function in tumor progression and metastasisUri Barash1, Victoria Cohen-Kaplan1, Ilana Dowek2, Ralph D. Sanderson3, Neta Ilan1 and Israel ... enzymatic activity-depen-dent and -independent functions mediated by deﬁnedprotein domains and splice variants, and cross-talkU. Barash et al. New concepts for heparanase functionFEBS Journal ... proliferation and the formation of larger colonies in soft agar, in aSrc- and EGFR-dependent manner [66]. The clinicalrelevance of the heparanase–Src–EGFR pathway hasbeen elucidated for head and neck...

Báo cáo khoa học: "Learning to Transform and Select Elementary Trees for Improved Syntax-based Machine Translations" ppt

... pseudo nodes and hyper edges to the forest,which makes the forest even denser and harder for nav-igation and search. As trees thrive in the search space,especially with the pseudo nodes and edges ... TranslationsBing Zhao†, and Young-Suk Lee†, and Xiaoqiang Luo†, and Liu Li‡IBM T.J. Watson Research† and Carnegie Mellon University‡{zhaob, ysuklee, xiaoluo}@us.ibm.com and liul@andrew.cmu.eduAbstractWe ... Association for Computational Linguistics, pages 846–855,Portland, Oregon, June 19-24, 2011.c2011 Association for Computational LinguisticsLearning to Transform and Select Elementary Trees for ImprovedSyntax-based...

Báo cáo khoa học: "Integrating Pattern-based and Distributional Similarity Methods for Lexical Entailment Acquisition" doc

... rela-tions for Information Extraction (IE) and QA, as in (Riloff and Shepherd, 1997; Ravichandran and Hovy, 2002; Yangarber et al., 2000). Patterns identify rather specific and informa-tive ... patterns we used for entailment ac-quisition based on (Hearst, 1992) and (Pantel et al., 2004). Capitalized terms indicate variables. pl and sg stand for plural and singular forms. 581used ... pattern-based and distributional in-formation (Section 3.3); 3: Applying SVM training and classification to the candidate pairs (Section 3.4). The first two components, of acquiring candidate pairs and...

Báo cáo khoa học: "Resolving Translation Ambiguity and Target Polysemy in Cross-Language Information Retrieval" potx

... dictionaries and selection strategies like select all (Hull and Grefenstette, 1996; Davis, 1997), randomly select N (Ballesteros and Croft, 1996; Kwok 1997) and select best N (Hayashi, Kikui and Susaki, ... performance and domain shift of corpus are major problems of these two approaches. Hybrid approaches (Ballesteros and Croft, 1998; Bian and Chen, 1998; Davis 1997) integrate both lexical and ... corpora (Davis and Dunning, 1996) and document-aligned corpora (Sheridan and Ballerini, 1996). These two approaches are complementary. Dictionary provides translation candidates, and corpus provides...

Báo cáo khoa học: "Combining Word-Level and Character-Level Models for Machine Translation Between Closely-Related Languages" ppt

... MK–EN, and Pr(b|e) and Pr(e|b) for EN–BG, where m, e, and b stand for aMacedonian, an English, and a Bulgarian word.Then, following (Callison-Burch et al., 2006; Wu and Wang, 2007; Utiyama and ... MK–EN and an EN–BG bitext.First, we induced IBM-model-4 word alignments for MK–EN and EN–BG, from which we extractedfour conditional lexical translation probabilities:Pr(m|e) and Pr(e|m) for ... alignments withgood performance in terms of phrase-based transla-tion. In our experiments, we used GIZA++ (Och and Ney, 2003) with standard settings and the grow-diagonal-ﬁnal -and heuristics to...

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