Báo cáo khoa học: "Alternative Approaches for Generating Bodies of Grammar Rules" docx

... Alternative Approaches for Generating Bodies of Grammar RulesGabriel Infante-Lopez and Maarten de RijkeInformatics Institute, University of Amsterdam{infante,mdr}@science.uva.nlAbstractWe ... used for generating bodies of rules inside a parsing procedure. We com-pare the two approaches along two dimensions: thequality of the probabilistic regular language theyproduce, and the performance ... Amsterdam{infante,mdr}@science.uva.nlAbstractWe compare two approaches for describing and gen-erating bodies of rules used for natural languageparsing. In today’s parsers rule bodies do not ex-ist a priori but are...

Báo cáo khoa học: Therapeutic approaches for prion and Alzheimer’s diseases pot

... inherited forms of CJD are the result of a point mutation in PrPCthatincreases the propensity for it to assume an abnormalconformation. Virtually all genetic defects implicatedin familial forms of ... con-formational transformation of these disease speciﬁc pro-teins and stabilize their abnormal structure. Examples of such proteins in AD include apolipoprotein E (apoE),especially its E4isoform ... and PrPScarecapable of forming amyloid deposits. The presence of amyloid deposits is necessary for making the diagnosis of AD [11,12]. Abundant amyloid deposits composed of PrPSc(full length...

Báo cáo khoa học: "An Algorithm For Generating Referential Descriptions With Flexible Interfaces" pdf

... namely: • the instant availability of all descriptors for an object to be described, • the adequate expressibility of a chosen set of descriptors in terms of lexical items. Motivated by the ... namely the instant availability of all descrip- tors of a referent and the satisfactory expressibility of the chosen set of descriptors. They are responsible for three serious deficits negatively ... neither for a vision system nor for a knowledge-based system is it without costs to determine all descriptors of a certain object - especially for the vision system, the computational effort...

Báo cáo khoa học: Alternative substrates for wild-type and L109A E. coli CTP synthases Kinetic evidence for a constricted ammonia tunnel doc

... CTPS concentrations were20 lgÆmL)1 for wild-type and 20–24 lgÆmL)1 for L109A. For assays of Gln- or Gln analogue-dependent CTPformation, concentrations of Gln were 0.1, 0.2, 0 .3, 0.5,1.0, ... lgÆmL)1 for wild-typeand 5–54 lgÆmL)1 for L109A in a total volume of 2.5 m L.All components were preincubated for 2.5 min at 37 °Cprior to initiation of the reaction by addition of substrate(Gln, ... betweenArg105 and Gly110 of E. coli CTPS are important for efﬁcient coupling of Gln hydrolysis in the GAT domain toCTP formation in the s ynthase domain. Replacement of thehighly conserved L...

Báo cáo khoa học: "A Model For Generating Better Explanations" pot

... A Model For Generating Better Explanations Peter van Beek Department of Computer Science University of Waterloo Waterloo, Ontario CANADA N2L 3G1 Abstract Previous work in generating ... plans hypothesized of a user. An explicit model of the user is maintained to track the goals, plans, and preferences of the user and also to record some of the background of the user pertinent ... shows a portion of the simplified domain plan for getting a degree. Consider the first clause of the counts_ .for_ credit predicate. This clause states that a course will count for credit if...

Báo cáo khoa học: "AN ALGORITHM FOR GENERATING NON-REDUNDANT QUANTIFIER SCOPINGS" pptx

... selected for the generation of a subformula, the gain for sentences like (5) is Iremendous 9. The above suggests that complexity for scoping algorithms is a function of both the number of quan- ... number of permutations of quantifiers. For sen~ tences which contain two argument NPs and the rest of the quantifiers nested inside each of these, the number of scopings is also N(n). For sentences ... functions are included for the type of input structure s used. Further, a:few constructor functions must be included to define the format of the logical forms generated. The role of the main access...

Tài liệu Báo cáo khoa học: "A Method for Measuring Machine Translation Conﬁdence" docx

... follow:P =the number of correctly tagged labelsthe number of tagged labelsR =the number of correctly tagged labelsthe number of reference labelsF =2*P*RP+R(8)4.2 Contribution of feature setsWe ... showed that most of the participants in the developing countries are ready to introduce qualitative changes in the pattern of their lives for the sake of reducing the effects of climate change. ... showedthat most of the participants in the developing countries are ready to introducequalitativechanges inthe pattern of their lives for the sake of reducing the effects of climate change....

Tài liệu Báo cáo khoa học: "Efficient Parsing for Bilexical Context-Free Grammar sand Head Automaton Grammars*" pptx

... O(n 4) results for the natural formalism of bilexical context-free grammar, and for AI- shawi's (1996) head automaton grammars. For the usual case, split head automaton grammars or equivalent ... of the form A[a] + ~. A T is just a derivation (proof tree) of lZ~n ,.o parse and its probability like that of any derivation we find is defined as the product of the prob- abilities of ... ~ c~ of G, where A = fa(q). 8 Split head automaton grammars in time O(n 3) For many bilexical CFGs or HAGs of practical significance, just as for the bilexical version of link grammars...

Tài liệu Báo cáo khoa học: "A PROGRAM FOR ALIGNING SENTENCES IN BILINGUAL CORPORA" docx

... compare performance across different algorithms in a straightforward fashion. The program made 36 errors out of 621 total alignments (5.8%) for English-French, and 19 errors out of 695 (2.7%) ... probabilistic score is assigned to each proposed pair of sentences, based on the ratio of lengths of the two sentences (in characters) and the variance of this We will have little to say about how ... the mean, c, and variance, s 2, of this distribution, c is the expected number of characters in L2 per character in L1, and s 2 is the variance of the number of characters in L2 per character...

Tài liệu Báo cáo khoa học: Different mechanisms for cellular internalization of the HIV-1 Tat-derived cell penetrating peptide and recombinant proteins fused to Tat docx

... (Sigma)was performed as previously described [21]. However for easier hand ling of the cells, treatment was performed onHeLa cells instead of CHO K1 cells. C ells were thenincubated with of 5 lgámL)1Tat±GFP ... length of the polyarginine tract seemscritical, as a maximal rate of internalization was observed for a peptide nine arginine residues i n length. TheD-formand the retro-inverso form of the ... rightward shift of the s ignal was observedsignifying a reduction of the uptake of the Tat peptide atlow temperature. Likewise, a threefold r eduction of theuptake at 4 °C has been reported for the...

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