Báo cáo khoa học: "Unsupervised Lexicon-Based Resolution of Unknown Words for Full Morphological Analysis" doc

... Proceedings of ACL-08: HLT, pages 728–736,Columbus, Ohio, USA, June 2008.c2008 Association for Computational LinguisticsUnsupervised Lexicon-Based Resolution of Unknown Words for Full Morphological ... dis-ambiguation of unknown words over a com-petitive baseline (to a level of 70% accurate full disambiguation of unknown words) . Wehave also veriﬁed that taking advantage of astrong language-speciﬁc ... anal-ysis for unknown words in 85% of the cases, con-tributing an error reduction of over 30% over a com-petitive baseline for the overall task of full morpho-logical analysis in Hebrew.The task of...

Báo cáo khoa học: "Improving the Use of Pseudo-Words for Evaluating Selectional Preferences" docx

... LinguisticsImproving the Use of Pseudo -Words for EvaluatingSelectional PreferencesNathanael Chambers and Dan JurafskyDepartment of Computer ScienceStanford University{natec,jurafsky}@stanford.eduAbstractThis ... model ranks a set of possible arguments for a verb by their se-mantic ﬁt to the verb. Pseudo -words serveas a proxy evaluation for these decisions.The evaluation takes an argument of a verblike ... pa-per studies two main aspects of pseudo-word creation that affect performance re-sults. (1) Pseudo-word evaluations oftenevaluate only a subset of the words. Weshow that selectional preferences...

Tài liệu Báo cáo khoa học: "Unsupervised Discourse Segmentation of Documents with Inherently Parallel Structure" pdf

... facilitatethe development of better user interfaces and im-prove the performance of summarization and in-formation retrieval systems.Discourse segmentation of the documents com-posed of parallel parts ... to the problem of segmenting parallelparts of documents.The task of aligning each sentence of an abstractto one or more sentences of the body has beenstudied in the context of summarization ... model is as follows:• Draw the document-level topic proportions β (doc) ∼GEM(α (doc) ).• Choose the document-level language model φ (doc) i∼Dir(γ (doc) ) for i ∈ {1, 2, . . .}.• Draw the...

Tài liệu Báo cáo khoa học: "THE BY RESOLUTION OF LOCAL SYNTACTIC AMBIGUITY THE HUMAN SENTENCE PROCESSING MECHANISM" doc

... consider a number of such experiments, and the different patterns of results which emerge once contextual information is provided. Although the importance of contextual information will be ... with the provision of contexts which are felicitous with one or other of the two versions of their examples. The following contexts were devised for an experiment (Altmann, forthcoming, and ... advance of the target sentence (i.e. was Given), and this time, strong effects of context were found on both kinds of target (113 msec for NP-attached targets across the two conditions of context,...

Báo cáo khoa học: "Unsupervised Coreference Resolution in a Nonparametric Bayesian Model" potx

... model of several kinds of discoursevariables, it can be used to make predictions abouteither kind of coreference, though we focus experi-mentally on within-document measures. To the best of our ... coreference performance.2 Experimental SetupWe adopt the terminology of the Automatic ContextExtraction (ACE) task (NIST, 2004). For this paper,we assume that each document in a corpus consists of a ... coreference resolution models for documentcorpora. All are essentially mixture models, wherethe mixture components correspond to entities. Asfar as notation, we assume a collection of I docu-ments,...

Tài liệu Báo cáo khoa học: Prion protein library of recombinant constructs for structural biology docx

... [26] for the numeration used in this article). This C-terminalfragment forms a globular domain both as part of the full- length sequence and in the isolated form, and there-fore constructs of ... 2009 FEBSTable 1. List of plasmids encoding the sequence of the mature cellular form of the prion protein from a variety of species and truncatedvariants thereof, and of human doppel. The protein ... have been used for NMR structure determina-tions with many of the species [7,9–14,19,20,23,24].Actually, structure determinations of the full- lengthprotein have been performed only for the PrPs...

Tài liệu Báo cáo khoa học: A functional polymorphism of apolipoprotein C1 detected by mass spectrometry docx

... fraction of full- length ApoC1was determined from the peak intensity of full- length pro-tein divided by the sum of intensities for full- length andtruncated ApoC1. The rate constant for disappearance ... ratios of truncated to full- length ApoC1were constant across the ultracentrifuge fractions for both the S45 and T45 variants (open symbols, Fig. 3E)as were the ratios of four isoforms of ApoC3 ... to truncated forms of the T45 variant (m ⁄ z ¼ 6632 ⁄ 6434, e) and the S45 variant (m ⁄ z ¼6618 ⁄ 6420, h). (F) Peak ratios of lipoprotein isoforms. The ratio of peak intensities for ApoC2 (m...

Tài liệu Báo cáo khoa học: "DiMLex: A lexicon of discourse markers for text generation and understanding" docx

... techniques. For tasks of this kind, DiMLex can supply the set of cue words to be looked for and support the initial disambiguation of cues in the text. Depending on the depth of the syntactic ... grammar rather than to the lexicon. But for a single discourse relation there is often a set of similar markers, allowing for a range of para- phrases for expressing the relation. To capture ... positions, whereas the positions of others are fixed. The linear order of the conjuncts is fixed for some markers and flexible for others; this is independent of the aforementioned two features....

Tài liệu Báo cáo khoa học: The solution structure of reduced dimeric copper zinc superoxide dismutase doc

... hairpin (HN of Leu38 and CO of Gly93) andthe H-bond between HN of Gly93 and CO of Asp90 (loopFig. 7. View of the active channel of human reduced native SOD. Ori-entation of the s ide chain of Arg143 ... 000 steps for the dimeric form. The dimeric nature of the protein wastaken into account by co nnecting the amino a cid sequence of the two subunits with a chain of linkers composed of atoms with ... HN(CA)CO-TROSY-type spectra already performed for the backboneassignment, reported by us [30].The assignment of the resonances of the s ide chains wasperformed through the analysis of three-dimensionalH(C)CH-TOCSY...

Báo cáo khoa học: MR solution structure of the precursor for carnobacteriocin B2, an antimicrobial peptide fromCarnobacterium piscicola Implications of the a-helical leader section for export and inhibition of type IIa bacteriocin activity pdf

... Biochemistry, University of Alberta) for performing all CD experiments. Albin Otter (Department of Chemistry) and Ryan T. McKay (NANUC, University of Alberta)are gratefully acknowledged for assistance ... purple.Fig. 4. Superimposition of preCbnB2 structures. (A) Superimposition of the backbone of the leader peptide a-helix for 20 structures. (B)Superimposition of the backbone of helix 2. Both helix ... Interest-ingly, the high sequence homology of the N-terminalportion does not lead to conserved 3D structures for thissection of the molecules because of polarity differences of the few varying residues [9]....

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