Báo cáo khoa học: "Describing Syntax with Star-Free Regular Expressions" ppt

... Papert, 1971).Sometimes star-freeness of a language can beshown by means of closure properties of star-free languages. To start with, finite regular languagesare star-free (especially 0, 6, ... described with a star-free regular expression if it can be constructed fromalphabet symbols by application of union (A UB), complementation (A) and finite concatena-tion (AB), that is, without ... the grammar star-free. Thirdly(iii),heuristic methods can be used to solve manylarge star-freeness problems in practice. Fourthly(iv),it is often possible to find star-free regular ex-pressions...

Báo cáo khoa học: "Tweet Recommendation with Graph Co-Ranking" ppt

... State-of-art tweet re-trieval methods include a linear regression model bi-ased towards text quality with a regularization factorinspired by the hypothesis that documents similarin content may have ... Section 3.4). Fix somedamping factor µ and say that at each time step with probability (1-µ) we stick to random walking and with probability µ we do not make a usual randomwalk step, but instead ... considering the weighted matrix M, or jumpsto a random node with equal probability. It pro-duces a global ranking over all tweets in the col-lection without taking speciﬁc users into account.As there...

Báo cáo khoa học: "Embedding New Information into Referring Expressions" ppt

... or a rhetorical relation between them, while tex- tual parataxis deals with any adjacent facts from text planning, with no rhetorical connection between. In step 3), both types of parataxis ... expressions, which addresses the referring part, while little has ad- dressed the generation issues with respect to the other part, except that in (Scott and de Souza, 1990), the relation between ... aggregation process called embedding, which selects suitable facts and realises them as components within the structure of a referring expression. The algorithm fits into the text planner of ILEX...

Tài liệu Báo cáo khoa học: Amprenavir complexes with HIV-1 protease and its drug-resistant mutants altering hydrophobic clusters docx

... PR with the V32I mutation; PRI50V, PR with the I50V mutation; PRI54M, PR with the I54M mutation; PRI54V, PR with the I54V mutation; PRI84V, PR with the I84V mutation; PRL90M, PR with ... compared with PRWT–SQV. (B) PRI50V–APV compared with PRI50V–SQV. (C)PRI54M–APV compared with PRI54M–SQV. (D) PRI54V–APV compared with PRI54V–SQV. (E) PRI84V–APV compared with PRI84V–SQV. ... the complexes with both inhibitors.DiscussionWe have described an atomic resolution crystal struc-ture of PRWT with APV, and analyzed structuralchanges in the APV complexes with mutants PRV32I,PRI50V,PRI54M,PR154V,PRI84Vand...

Tài liệu Báo cáo khoa học: A tyrosinase with an abnormally high tyrosine hydroxylase/dopa oxidase ratio Role of the seventh histidine and accessibility to the active site docx

... R3. The PCR product with a size of  1.6 kbwas digested with BamHI to obtain a fragment betweenthe two copper-binding site coding regions and ligatedto pBlueScript pKSII(+) with T4 DNA ligase ... R3-1501–than R3-0337–. This pattern agrees with the presence of twodifferent enzymes with overlapping activities.Purification of two enzymes with differentaffinities for monophenols and o-diphenolsSupernatants ... differentforms during the cycles: met, resting tyrosinase with Cu(II); oxy,oxygenated form with peroxide bound to Cu(II); deoxy, reducedCu(I) transient form with high affinity for oxygen. The efficiency forboth...

Tài liệu Báo cáo khoa học: "Semantic Parsing with Bayesian Tree Transducers" doc

... regular tree language.A regular tree grammar (RTG) closely resemblesa context free grammar (CFG), and is a way of de-scribing a language of trees. Formally, define TΣasthe set of trees with ... a pattern with which to expandit and then filling out that pattern with words drawnfrom a unigram distribution.This kind of coupled generative process canbe naturally formalized with tree ... the last of these as just onebenefit of working within a general theory: contri-butions are more broadly applicable.2 Meaning representations and regular tree grammarsIn semantic parsing, an...

Tài liệu Báo cáo khoa học: "Word Alignment with Synonym Regularization" doc

... alignment model. We formulate a syn-onym pair generative model with a topic variableand use this model as a regularization term with abilingual word alignment model. The topic vari-able in ... parameter set of our model.3.2 Word Alignment with SynonymRegularizationIn this section, we extend the bilingual genera-tive model (HM-BiTAM) with our synonym pairmodel. Our expectation is ... the SRH.We show the performance of GIZA++ and HM-BiTAM with the SRH in the lines entitled with SRH” in Table 1. The GIZA++ and HM-BiTAM with the SRH slightly outperformed the standardGIZA++...

Tài liệu Báo cáo khoa học: "Coreference Resolution with Reconcile" pdf

... infrastructure to sup-port the creation of, experimentation with, andevaluation of coreference resolvers. Reconcilewas designed with the following seven desideratain mind:• implement the ... present).The basic architecture of the system includesﬁve major steps. Starting with a corpus of docu-ments together with a manually annotated corefer-ence resolution answer key1, Reconcile performs1Only ... original Javacode. Only about 15% of the code is concerned with running existing components in the prepro-cessing step, while the rest deals with NP extrac-tion, implementations of features, clustering...

Tài liệu Báo cáo khoa học: "Disentangling Chat with Local Coherence Models" pdf

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Tài liệu Báo cáo khoa học: "A Syntax-Driven Bracketing Model for Phrase-Based Translation" pptx

... instance with the minimal τ(ci k), 2)the bracketable instance with the maximal τ(ci k),3) the unbracketable instance with the minimalτ(ci k), and 4) the unbracketable instance with themaximal ... the effects of syntax- drivenfeatures and differences of 1-best translation out-puts.5.1 Effects of Syntax- Driven FeaturesWe conducted further experiments using individ-ual syntax- driven features ... boundaries (within double-underlined phrases).6 ConclusionIn this paper, we presented a syntax- driven brack-eting model that automatically learns bracketingknowledge from training corpus. With this...

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