Tài liệu Báo cáo khoa học: "Guided Learning for Bidirectional Sequence Classiﬁcation" ppt

... our learning algorithm is the strategyused to select samples for training.In general, this novel learning framework lies be-tween supervised learning and reinforcement learn-ing. Guided learning ... thesearch space is too large in bidirectional search, ifwe do not use aggressive learning to constrain thesamples for learning. With aggressive learning, the bidirectional ap-proach always ... performs at most n iterations, and its run-ning time is therefore O(B2n), that is, linear in thelength of the input sequence. 2.3 Learning AlgorithmIn this section, we propose guided learning, ...

Tài liệu Báo cáo khoa học: "Machine Learning for Coreference Resolution: From Local Classiﬁcation to Global Ranking" ppt

... systemsadopting the standard machine learning approach,outperforming them by as much as 4–7% on thethree data sets for one of the performance metrics.2 Related WorkAs mentioned before, our approach differs ... and Cardie (2002b) for details. Learning algorithms. We consider three learning algorithms, namely, the C4.5 decision tree inductionsystem (Quinlan, 1993), the RIPPER rule learning algorithm ... we do not relyon additional labeled data for learning the ranker;instead, we use half of the training texts for trainingclassiﬁers and the other half for ranking purposes.Results using our...

Tài liệu Báo cáo khoa học: "Topic Models for Dynamic Translation Model Adaptation" pptx

... unseen for a given domain s, we are alreadyperforming an implicit form of smoothing (whencomputing the expected counts), since each docu-ment has a distribution over all topics, and thereforewe ... model (Zhao and Xing, 2006),which uses a bilingual topic model for learning alignment. In our case, by building a topic distri-bution for the source side of the training data, weabstract the notion ... Meeting of the Association for Computational Linguistics, pages 115–119,Jeju, Republic of Korea, 8-14 July 2012.c2012 Association for Computational LinguisticsTopic Models for Dynamic Translation...

Tài liệu Báo cáo khoa học: "The Sentimental Factor: Improving Review Classiﬁcation via Human-Provided Information" docx

... ever-increasingnumbers, making automated techniques for infor-mation extraction increasingly useful. Traditionally,most research effort has been directed towards “ob-jective” information, such as classiﬁcation ... theupper one is for the original unsupervised classiﬁer,and the lower is for the most successful unsuper-vised method.lect data for the complete set of WordNet syn-onyms for the words good, ... is growing in produc-ing information about the opinions that a documentcontains; for instance, Morinaga et al. (2002). InMarch, 2004, the American Association for Artiﬁ-cial Intelligence...

Tài liệu Báo cáo khoa học: "On Learning Subtypes of the Part-Whole Relation: Do Not Mix your Seeds" pdf

... majorquestions.1. Is information extraction (IE) harder when learning the individual types of part-wholerelations? That is, we determine whether theperformance of state-of-the-art IE systems in learning ... types by enforcing semanticalselectional restrictions, in the form of DOLCE on-tology (Gangemi et al., 2002) classes, on their en-tities.In NLP, information extraction (IE) techniques, for discovering ... benchmarks for evaluating the performance of general relation ex-traction systems (Pantel and Pennacchiotti, 2006;Beamer et al., 2008; Pyysalo et al., 2009). How-ever, these relation extraction efforts...

Tài liệu Báo cáo khoa học: "Automatic learning of textual entailments with cross-pair similarities" ppt

... previousanalysis for misspelling errors or for the lack ofderivationally forms not coded in WordNet.As result, given the syntactic categorycw∈ {noun, verb, adj ective, adverb} andthe lemmatized form ... transformations T applied over syntactic andsemantic interpretations. The entailment betweenT and H is detected when there is a transformationr ∈ T so that sim(r(T ), H) > α. These trans-formations ... Annual Meeting of the ACL, pages 401–408,Sydney, July 2006.c2006 Association for Computational LinguisticsAutomatic learning of textual entailments with cross-pair similaritiesFabio Massimo ZanzottoDISCoUniversity...

Tài liệu Báo cáo khoa học: "Online Learning of Approximate Dependency Parsing Algorithms" potx

... argued for a dependency formal-ism called Discontinuous Grammar and annotateda large set of Danish sentences using this formal-ism to create the Danish Dependency Treebank(Kromann, 2003). The formalism ... algorithms for both projective and non-projective trees. Whencombined with a discriminative online learning al-gorithm and a rich feature set, these models pro-vide state-of-the-art performance ... graph.Furthermore, it was shown that this formulationcan lead to state-of-the-art results when combinedwith discriminative learning algorithms.Although the MST formulation applies to anydirected...

Tài liệu Báo cáo khoa học: A strategy for discovery of cancer glyco-biomarkers in serum using newly developed technologies for glycoproteomics ppt

... with easy access to information on glyc-ogenes. In the GGDB, the information on each glyco-gene is stored in XML format: gene names (genesymbols), enzyme names, DNA sequences, tissue distri-bution ... malignant transformation.Lectin microarray – a powerfultechnology for selection of lectins for cancer glyco-biomarkersThe lectin microarray system is an emerging technique for analyzing glycan ... microarray system is the best tool for a ‘cell proﬁler’, and it is expected to be applicable for selection of cancer-speciﬁc lectins and for qualitycontrol of stem cells before transplantation [12–15].Recently,...

Tài liệu Báo cáo khoa học: Survival mechanisms of pathogenic Mycobacterium tuberculosis H37Rv ppt

... (2001) The Mycobacterium tubercu-losis pks2 gene encodes the synthase for the hepta- andoctamethyl-branched fatty acids required for sulfolipidsynthesis. J Biol Chem 276, 16833–16839.78 Lam TH, ... functions as a regulator for differen-tiation in Streptomyces coelicolor. Mol Microbiol 30,107–119.94 Vidwans SJ, Ireton K & Grossman AD (1995) Possiblerole for the essential GTP-binding ... be homologs of genes for M. tuberculosis PE ⁄ PE-PGRS, a family encodingnumerous repetitive glycine-rich proteins of unknownfunction(s). The mutation of these two genes for PE-PGRS produced...

Tài liệu Báo cáo khoa học: The cellulosomes from Clostridium cellulolyticum Identiﬁcation of new components and synergies between complexes ppt

... by genes that code for the major cellulosomalcellulase Cel48F and nine other dockerin-containingenzymes [15]. Cellulases encoded by the cip-cel clusterare essential for the formation of efﬁcient ... fractions, except for F1, whichwas found to be approximately ﬁvefold more activethan the others. The cellulosomes present in fractionsF1 and F6 therefore have the most efﬁcient enzymes for degrading ... for the proteins 6, 7a and 7b, and 10 which were identiﬁed using theMS ⁄ MS technique. The modular structure of new proteins was determined by performing PFAM and BLAST analyses. S, signal sequence; GH,...

Xem thêm