Tài liệu Báo cáo khoa học: "Counter-Training in Discovery of Semantic Patterns" doc
Tài liệu Báo cáo khoa học: "Experiments in Reusability of Grammatical Resources" pot
... use of a term for the value of PRED • for compilation steps which modify the original structure of the grammar (e.g. turning inequa- tions in finite domains into disjunctions, map- ping ... into ALEP allowing their effects to be expanded into the rules. In this spirit, follow- ing the work of Mellish [Mellish 1988] the technique of encoding boolean combinations of atomic feature ... membership constraints on list representations, element and set difference constraints can only be ap- proximated in terms of a multitude of minimally dif- fering rules naming elements in set representations....
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Tài liệu Báo cáo khoa học: The social life of ribosomal proteins doc
... protein structure andinteraction with rRNA were mainly studied in a ‘dissect-ing’ fashion, focusing on each individual protein in turn[2]. Many individual protein structures were determined in ... few interesting aspects of assemblythat the structures have shed light on. In their paper describing the details of protein–RNAinteractions in the 50S subunit, Klein et al. argue thatproteins ... &Murzin AG (1997) The solution structure of the S1RNA binding domain: a member of an ancient nucleicacid-binding fold. Cell 88, 235–242.33 Shine J & Dalgarno L (1974) The 3¢-terminal sequenceof...
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Tài liệu Báo cáo khoa học: "A Comprehensive Dictionary of Multiword Expressions" doc
... proper solution of idiosyncratic multiword expressions (MWEs) is one of the most difficult and intriguing problems in NLP. In principle, the nature of the idiosyncrasy of MWEs is twofold: one ... An indication of the syntactic flexibility of entry expressions (i.e., possibility of internal modification of constituent words) of entry expressions. In section 2, we outline the main features ... because of the difficulty of extracting correctly without any human insight. Recognizing the crucial importance of such expressions, one of the authors of the current paper began in the 1970s...
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Tài liệu Báo cáo khoa học: "Analyzing the Errors of Unsupervised Learning" docx
... x) (discriminative training). In the remaining sections, we try to study each of the four errors in isolation. In practice, since it isdifficult to work with some of the parameter settingsthat ... following three model families: In the HMM, the input x is a sequence of wordsand the output y is the corresponding sequence of part -of- speech tags. In the PCFG, the input x is a sequence of POStags ... contributions include(1) using a meta-model to analyze the incor-rect biases of a model in a systematic way,(2) providing an efficient and robust method of measuring distance between two parametersettings...
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Tài liệu Báo cáo khoa học: "Modelling the substitutability of discourse connectives" doc
... high degree of surprise in seeing one in place of the other. This is indicatedusing dark shading in Figure 3e. Only one set isshaded because we need only consider the contexts in which w1is ... relateclauses within a sentence. These include coordinat-ing conjunctions (e.g. but) and a range of subordina-tors including conjunctions (e.g. because) as well asphrases introducing adverbial ... can ob-tain an additional perspective by using a variance-based function. We now introduce a new function Vby taking the variance of the surprise in seeing w2,over the contexts in which...
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Tài liệu Báo cáo khoa học: "A Selectionist Theory of Language Acquisition" docx
... actual find- ings in child language. Further evidence against statistical learning comes from the Root Infinitive (RI) stage (Wexler, 1994; inter alia) in children acquiring certain languages. ... probabili- ties of competing grammars relative to the in- put data in the linguistic environment [3]. In this paper, we present longitudinal evidence concerning the prediction in (2). 4 To evaluate ... of learning. The selectionist theory, if correct, show an example of the interaction between domain- specific knowledge and domain-neutral mechanisms, which combine to explain properties of...
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Tài liệu Báo cáo khoa học: "COMPUTER AIDED INTERPRETATION OF LEXICAL COOCCURRENCES" docx
... problem of developing a large semantic lexicon for natural language processing. The increas~g availability of machine readable documents offers an opportunity to the field of lexieal semantics, ... advantage of surface meaning is that makes it easier the acquisition of the semantic lexicon. This issue is examined in the next section. Acquisition of Lexical Semantic Knowledge. Acquiring semantic ... The information presented in a standard dictionary has in our view some intrinsic limitation: s definitions are often circular e.g. the definition of a term A may refer to a term B that in...
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Tài liệu Báo cáo khoa học: The central role of CDE/CHR promoter elements in the regulation of cell cycle-dependent gene transcription pdf
... acti-vating E2Fs cooperate with NF-Y proteins binding toCCAAT-boxes and with Myb proteins associating witha distal Myb site in activating the Cdc2 promoter.Binding of the activating E2Fs during ... Dimethyl sulfate footprint-ing of the CDE in the presence of SV40 large T indi-cated a loss of protein occupation on this site in vivo[79].Elevated expression of cyclin A, cyclin B, Cdc25Cand Cdc2 ... repression of genes, such as cyclinA and cyclin B1, in dividing cells [92]. Furthermore,depletion of Lin-9 and B-Myb in p53) ⁄ )MEFs causedlowered expression of cyclin A, cyclin B and Cdc2 [94].In...
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Tài liệu Báo cáo khoa học: NMR structural characterization of HIV-1 virus protein U cytoplasmic domain in the presence of dodecylphosphatidylcholine micelles doc
... K, Hoffmann S, Bauer F, Friedrich U,Kardinal C, Feller SM, Biesinger B & Sticht H (2002)Structural investigation of the binding of a herpesviralprotein to the SH3 domain of tyrosine kinase ... 2009 FEBSretained in the centre of the interhelical linker and atthe C-terminus of micelle-associated VpUcyt.Position of VpUcyt relative to the micelleNMR signal intensities of individual VpUcyt ... effect of a paramagneticprobe on individual amino acids is quantified in terms of the percentage of NMR signal retention, which is derivedfrom comparison of HSQC cross-peak intensities of VpUcyt in...
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Tài liệu Báo cáo khoa học: The crystal structure of human a-amino-b-carboxymuconatee-semialdehyde decarboxylase in complex with 1,3-dihydroxyacetonephosphate suggests a regulatory link between NAD synthesis and glycolysis ppt
... upregulation in the liver of streptozotocin-induced diabetic rats and the suppres-sion of such elevation following insulin injection[21,22], we decided to investigate the effect of NHCH2CHCOOHNH2L-kynurenineCHOCOOHCOOHNH2Tryptophanα-amino-β-carboxymuconate-ε-semialdehyde ... represents the first structure of an ACMSD in a ligand-bound form and can be usedto provide insights into catalysis. In particular, theresidues involved in inhibitor binding can be suggestedto be ... to Zn2+coordination but also because of itsdirect involvement in substrate binding (Fig. 3A,B).Indeed, as detailed above, Asp291 stabilizes DHAPthrough interaction with the inhibitor carbonyl...
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