Tài liệu Báo cáo khoa học: "A GENERALIZATION OF THE OFFLINE PARSABLE GRAMMARS" doc

... s is the most general unifier of A n and A' (after suitable renaming of variables). Then the set of ground instances of lists in D n is the set of chain derivations of length n in the ... D; at this depth there are no parse trees, and then the parser will halt. The essential properties of offline parable grammars are these: Theorem 1. It is decidable whe...

Ngày tải lên: 21/02/2014, 20:20

... man- ganese in the transcriptional regulation of the nrd operon [35] may not be considered in the light of the results obtained in the present study. Rather, the involvement of manganese in the in vivo ... to the catalytic site of the R1E subunit. As reported in the Results, upon completion of substrate conversion, the radical is then rapidly passed back from...

Ngày tải lên: 15/02/2014, 01:20

... myogenic differentiation. Taken together, these results illustrate a critical and specific role of miR-27 in the regulation of adipogenic differentiation. miR-27 prevents the induction of PPARc and C ⁄ EBPa In ... to delineate the mechanisms by which miR-27 inhibits adipogenic differentiation, we investigated the effect of miR-27 on the expression of the well-defined key t...

Ngày tải lên: 18/02/2014, 08:20

... according to the residue in the mid- point of the respective loop, as shown in Fig. 2. To the east of the active site the 37- and 60-loops border the S2¢ pocket of the proteinase. The observed ... below). The southern boundary of the active site cleft of DESC1 is formed by the 145 autolysis loop. The backbone of this loop differs mark- edly from the oth...

Ngày tải lên: 19/02/2014, 00:20

... determines the shape of the active site entry. (e) The structure of the active site is essentially identical with the active sites of the MshB and LpxC proteins. The conservation of catalytically important ... formation. Sections (6 A ˚ thick) of the protein surface that illustrate the shape and size of the active site. The sphere represents the zinc ion. (...

Ngày tải lên: 19/02/2014, 00:20

... tf i is the number of times term i occurs in D, idf i is the inverse document frequency of term i, N is the total number of documents and df i is the number of documents that contain term i. The ... localizing the estimation of idf to the documents of one or the other class and subtract- ing the two values. Therefore, the weight of term 1388 Table 2: SMART no...

Ngày tải lên: 20/02/2014, 04:20

... mechanism of antitumour action of BS-RNase is based on the ability of the protein to resist the neutralizing action of the cytosolic RNase inhibitor, a resistance due to the dimeric structure of the enzyme. ... hypothesize that the cytotoxic activity of the latter monomers was due to the presence in these proteins of disulfide bonds, with their potential chemica...

Ngày tải lên: 20/02/2014, 11:20

... string of text with the most overlap with the text of the annotated argument. Each of the parsing methods tokenizes the input string differently, so in order to simplify the selection of the ... section of the New York Times gi- gaword corpus from the Linguistic Data Consor- tium. These four verbs were chosen because of the synonymy among the first two, an...

Ngày tải lên: 20/02/2014, 12:20

... is the initial state of Mr, ")' is the label of the root ofT, ",/• T, then return the final derivation tree T. 6 Discussion The approach described here offers empirical rather ... use of minimized automata produced from sets of trees that an- chor the same input symbol. The input to the parser takes the form of a se- quence of minimized autom...

Ngày tải lên: 20/02/2014, 18:20

... make the right choice. The leftward attaching operation equates the root of the tree fragment on the end of the list with some node in the grammar entry, as long as this root is not the initializing ... entry to the end of the tree frag- ment list using equationless combining. The up- dating rules of the parser then calculate that the VP root of this...

Ngày tải lên: 20/02/2014, 21:20