Báo cáo khoa học: "Deep dependencies from context-free statistical parsers: correcting the surface dependency approximation" pptx

... Deep dependencies from context-free statistical parsers: correcting the surface dependency approximationRoger LevyDepartment of LinguisticsStanford ... The secondwas the ambiguity that some matrix S-initial NPsare actually dependents of the VP head (in thesecases, NEGRA annotates the finite verb as the headof S and the non-finite verb as the ... de-gree current statistical parsers are a useful step inanalysis by examining the performance of further statistical classifiers on non-local dependency re-covery from CF parse trees. The natural...

Báo cáo khoa học: "Extracting Paraphrases from Deﬁnition Sentences on the Web" pptx

... conveymostly the same information using different expres-sions. Such functions other than deﬁnition may in-clude the usage of the same Linux command, the recipe for the same cuisine, or the description ... con-siderably fewer in the number of deﬁnition sen-tences than those on the Web. Thus, the coverage oftheir method should be quite limited. Furthermore, the precision of their method is much ... ratio of the number of a candidate phrase’s morphemes, for which there is a morpheme with the same pronunciation in another candidatephrase, to the number of all of the morphemes in the two phrases....

Báo cáo khoa học: "Better Hypothesis Testing for Statistical Machine Translation: Controlling for Optimizer Instability" pptx

... exchanging onlyhypotheses that correspond to the same sentence.Table 2 shows the p-values computed by AR, test-ing the significance of the differences between the two systems in each pair. The first three ... optimizeroutputs from our large pool and ran the AR test todetermine the significance; we repeated this proce-dure 250 times. The p-values reported are the p-values at the edges of the 95% confidence ... the language pair, the portionof the search space visible to the optimizer (e.g. 10-best, 100-best, a lattice, a hypergraph), and the sizeof the tuning set. Unfortunately, there is no proxy...

Tài liệu Báo cáo khoa học: Suppressed catalytic efﬁciency of plasmin in the presence of long-chain fatty acids Identiﬁcation of kinetic parameters from continuous enzymatic assay with Monte Carlo simulation ppt

... originate from the highly compacted platelet content of the thrombi [4].These lipid constituents of thrombi profoundly modu-late the ﬁbrinolytic process [2,3,5–7]. In the few studiesevaluating the ... region). The best estimate from the experiment is indi-cated by a red asterisk, whereas the best estimate from the Monte-Carlo simulation is indicated by a red circle. Numbers follow-ing the abbreviation ... of the enzyme–substrate complex). Addi-tional experiments identiﬁed p-nitroaniline as the factor responsible for the premature decline of the enzyme activity in the course of the assay. The...

Tài liệu Báo cáo khoa học: Complete subunit sequences, structure and evolution of the 6 · 6-mer hemocyanin from the common house centipede, Scutigera coleoptrata pptx

... conserved in any other arthropodhemocyanin subunit. Nevertheless, the glycosylation site ata-sheet 2E (Fig. 3) is located at the surface of the putativehemocyanin hexamer, as deduced from the comparisonwith ... the determination of the N-terminal sequences, C.Hunzinger for the MALDI-TOF analyses, C. Bache and J. Hermannsfor their help with the cloning experiments, and J. R. Harris for correcting the ... may be explained by the presence of an additional subunit in the sample that mostlikely corresponds to HcC, as also inferred from the minorsequence in the sample (not shown). The lower protein...

Tài liệu Báo cáo khoa học: "Prefix Probabilities from Stochastic Tree Adjoining Grammars*" pptx

... ing the correctness of the probability computation. The transformation of the equations is explained as follows. For an item I, the span of I, written a(I), is the 4-tuple representing the ... string modulo the computation of some parts of the derivation that do not contribute to the input itself. Com- bination of the second set of equations with the solutions obtained from the first ... = 0. (20) The definition of Pto~ parallels the one of P given in §4.1. In (12), the second term in the right-hand side accounts for the case in which the tree we are visiting is the "lowest"...

Tài liệu Báo cáo khoa học: Phenol hydroxylase from Acinetobacter radioresistens S13 Isolation and characterization of the regulatory component docx

... aminoacids at the N-terminus of PHI (sequence:SKVYLALQDND) were compared with the sequences of the so called ‘intermediate components’ from two otherPHs. The N-terminal sequence of PHI from A. radioresis-tens ... in the temperature range 10–70 °Cafter reaching thermal equilibrium. As shown in the inset, the progressive decrease of the molecular ellipticity atk ¼ 200 nm (the absorption region of the ... vitro’Reconstitution of the complex from the puriﬁed fractionswas studied by investigating the overall PH activity in the presence of variable amounts of each component. The assaywas performed...

Tài liệu Báo cáo khoa học: "word stress from spelling" ppt

... stressed using either the rules of the the language that it was borrowed from or the rules of the language that it was borrowed into. But neither the rules of Japanese nor the rules of English ... syllable noun, the weight of the antipenultimate is irrelevant if the penultimate is light and the weight of the initial two syllables are irrelevant if the penultimate is heavy. These redundancies ... on the weight of the penultimate. The program takes advantage of this fact by returning a sorted list of solutions, all of which meet the constraints, but the solutions toward the front of the...

Tài liệu Báo cáo khoa học: "Knowledge Acquisition from Texts : Using an Automatic Clustering Method Based on Noun-Modifier Relationship" pptx

... from the first data set. The columns are labelled by the expansions (nominal or adjectival) of the NPs being clustered. Each line represents a NP (an individual, in statistical terms) : there ... context) of a NP is the set of the candidate terms appearing in the expansion of the more complex candidate term containing the current NP in head position. For example, the candidate terms ... POWER) of the object LINE; the PU CONSTRUCTION OF THE LINE shows an action (CON- STRUCTION) which can be applied to the object LINE. This definition of the context is original compared to the...

Báo cáo khóa học: Selective release and function of one of the two FMN groups in the cytoplasmic NAD + -reducing [NiFe]-hydrogenase from Ralstonia eutropha pptx

... transfer from the hydride (formed at nickel) to the Fe-S clusters is hamperedby the absence of the FMN-a, it is unlikely that BV obtainselectrons from any of the Fe-S clusters during the H2-BVreaction. ... two of the Fe-S clusters in the small subunit of the D. gigas enzyme is missing in HoxY of the SH, suggesting anexposure of part of the hydrophobic surface of the HoxH subunit. Itwas therefore ... [NiFe]-hydrogenaseswhere the polypeptide of the small hydrogenase subunitends shortly after the position of the fourth Cys residueco-ordinating the proximal cluster [4]. The large HoxHsubunit in the SH contains...

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