**Báo cáo khoa học: "Polynomial Time and Space Shift-Reduce Parsing of Arbitrary Context-free Grammars *" ppt**

Báo cáo khoa học: "Polynomial Time and Space Shift-Reduce Parsing of Arbitrary Context-free Grammars.*" ppt

... Polynomial Time and Space Shift-Reduce Parsing of Arbitrary Context-free Grammars. * Yves Schabes Dept. of Computer & Information Science University of Pennsylvania Philadelphia, ... a result of the fact that the number of states of an LR(0) characteristic machine can be exponential and that there are some grammars and inputs for which an exponential number of states ... an example of a parsing table. 3 Complexity The recognizer requires in the worst case O([GIn2)- space and O([G[2na) -time; n is the length of the input string, ]GI is the size of the grammar...

Báo cáo khoa học: "FACTORING RECURSION AND DEPENDENCIES: AN ASPECT OF TREE ADJOINING GRAMMARS (TAG) AND A COMPARISON OF SOME FORMAL PROPERTIES OF TAGS, GPSGS, PLGS, AND LPGS " pot

... RECURSION AND DEPENDENCIES: AN ASPECT OF TREE ADJOINING GRAMMARS (TAG) AND A COMPARISON OF SOME FORMAL PROPERTIES OF TAGS, GPSGS, PLGS, AND LPGS * Aravind K. Joshi Department of Computer and Information ... patterns of dependencies that can or cannot be generated by the different types of grammars, (2) the degree of free word ordering permitted by different grammars, and (3) parsing complexity of ... a string of a's and b's such that (1) the number of a's = the number of b's and (2) for any initial substrlng of w, the number of a's ~ the number of b's.}...

Tài liệu Báo cáo khoa học: "An Earley-style Predictive Chart Parsing Method for Lambek Grammars" ppt

... the use of a rule DIll ~ a within the derivation of its daugh- ter BIll, and so the indexing system allows the encoding of dominance relations. 4 A New Chart Parsing Method for Lambek Grammars ... labelling of SLMG. A key differences of the new approach as compared to standard chart methods is that the usual external notion of span is dispensed with, and the combination of edges is ... to SLMG Conversion The first task of the parsing approach is to con- vert the antecedent formulae of the sequent to be proved into a collection of rules of a form- alism I call Span Labelled...

Báo cáo khoa học: "POLYNOMIAL TIME PARSING OF COMBINATORY CATEGORIAL GRAMMARS*" pptx

... POLYNOMIAL TIME PARSING OF COMBINATORY CATEGORIAL GRAMMARS* K. Vijay-Shanker Department of CIS University of Delaware Delaware, DE 19716 David J. Weir Department of EECS Northwestern ... that runs in polynomial time. We take advantage of the fact that regardless of the length of the category only a bounded amount of information (at the beginning and end of the cate- 5Although ... that the use of a combinatory rule depends only on (1) the target category of the primary category of th~ rule; (2) the first argument (sufrLx of length 1) of th~ primary category of the rule;(3)...

Báo cáo khoa học: "Polynomial Learnability and Locality of Formal Grammars" doc

... set of each one is dis- joint from that of any other, and then taking the union of the rules in all those grammars, and finally adding the rule S -* Si for each staxing symbol S~ of g,, and ... aposition ~ of the nonterminal in the right hand side of the host rule at which the rewriting ta~kes place. The degree of locality of a derivation is the number of distinct kinds of rewritings ... generate the set of all possible grammars having at most k of these rules. Since each k-simple component of 0 has at most k rules, the generated set of grammars will include all of the k-simple...

Tài liệu Báo cáo khoa học: Guanidinium chloride- and urea-induced unfolding of FprA, a mycobacterium NADPH-ferredoxin reductase Stabilization of an apo-protein by GdmCl docx

... the family of glutathione reductase [8], of whichFprA is a member. The FprA monomer consists of two domains: the FAD-binding domain (residues2–108 and 324–456) consisting of the N- and C-terminalregions ... stabilization of any partially foldedintermediate.ResultsWe have studied the effect of GdmCl- and urea-induced changes in the structural and functionalproperties of FprA. Time- dependent ... ﬂuorescenceintensity of FprA on incubation of the enzyme withincreasing concentrations of GdmCl are depicted. Alarge increase, about 20 times, in ﬂuorescence intensity of FAD was observed between 0.25 and 1...

Tài liệu Báo cáo khoa học: Dimer asymmetry and the catalytic cycle of alkaline phosphatase from Escherichia coli doc

... thecurve-ﬁtting procedure and describing the afﬁnity of thesubunits for the substrate (KS1 and KS2)andforPi(KI1 and KI2), presented in Table 1 and Table 2, respectively, areindependent of the Zn2+ion ... form of a dianion [9],however, the slow dissociation of Pi,andtheslowphosphorylation of Ser102 by Pi, are both in accordancewith Pibinding in form of a trianion.The crystal structure of ... asymmetry and the catalytic cycle of alkaline phosphatasefromEscherichia coliStjepan Orhanovic´ and Maja Pavela-VrancˇicˇDepartment of Chemistry, Faculty of Natural Sciences, Mathematics and...

Báo cáo khoa học: Substrate preference and phosphatidylinositol monophosphate inhibition of the catalytic domain of the Per-Arnt-Sim domain kinase PASKIN ppt

... against S6 and the GST-tag. (C) Immunoblot analysis of thephosphorylation status of p70S6K and S6 inPaskin+ ⁄ + and Paskin) ⁄ )MEFs. (D) Immu-noblot analysis of the phosphorylation status of p70S6K ... addressesDivision of Digestive and Liver Diseases,Department of Medicine, ColumbiaUniversity, New York, NY, USAàInstitute of Cell Biology, ETH Zu¨rich,Switzerland§Biogen-Dompe´, Zug, Switzerland(Received ... Ser ⁄ Thr kinase (PSK)1 and PSK2, the bud-ding yeast homologues of PASKIN, phosphorylatethree translation factors and two enzymes involved inthe regulation of glycogen and trehalose synthesis,thereby...

Báo cáo khóa học: O-acetylation and de-O-acetylation of sialic acids in human colorectal carcinoma docx

... bovine submandibular gland mucins as described byReuter and Schauer [23].4Preparation of lysosomal, microsomal and cytosolicfractions from human colonic mucosaThe lysosomes, microsomes and cytosol ... Fluorometric-HPLC and GC-MS analysis of glycoconjugate-bound and free sialic acids isolated from the mucosa of matched resection margin and colorectal carcinoma tissue. Sialic acids were isolated and analysed ... qualitative and quantitative determination of sialicacids [23]. In this report we utilized two very speciﬁc and powerful techniques, ﬂuorometric-HPLC and GC-MS, forthe detection and quantitation of...

Báo cáo khoa học: New human and mouse microRNA genes found by homology search pptx

... bothmiR-151 and miR-151*. From the predicted hairpinstructure of the precursor, the energies of hybridization of the four nucleotides located at the 50end of miR-151* and miR-151 are 1.7 and 0.1 ... strand, and in magenta when on the lower strand. (B) Localization of hsa-let-7d. This miRNA resides in anintron of pre-mRNAs BC045813 and BC036695 in the antisense orientation. The last exon of ... bothmouse and human, mir-135a-1 is produced from anintron of the host gene (AK051019 and AI936688 inmouse and human, respectively) and can direct thedegradation of a long form of the glycerate...

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