Báo cáo khoa học: "Parsing with Treebank Grammars: Empirical Bounds, Theoretical Models, and the Structure of the Penn Treebank" ppt

... Parsing with Treebank Grammars: Empirical Bounds, Theoretical Models, and the Structure of the Penn Treebank Dan Klein and Christopher D. Manning Computer Science ... @cs.stanford.edu Abstract This paper presents empirical studies and closely corresponding theoretical models of the performance of a chart parser exhaus- tively parsing the Penn Tre...

Ngày tải lên: 17/03/2014, 07:20

... same span and the same category are considered equivalent if they delay the evalua- tion of the probabilities of the same words and if they have the same number of lexical heads, and if the first ... between the dependency relations of Hij and geeft in the first sentence, bloem and geeft in the second sen- tence and politieman and geeft in the third sen...

Ngày tải lên: 20/02/2014, 16:20

... upper feature structure at the VP node of the tree for bought, and the feature structure at the foot of the tree for has is unified with the lower feature structure at the VP node of the tree for ... trees the anchor is also the head of the tree and becomes the head of the tree resulting from the adjunction. In modifier auxiliary trees, t...

Ngày tải lên: 08/03/2014, 21:20

... ing the degree of a cut to be the sum of sizes of the proofs of its two premises, where the size is the num- ber of nodes in the proof. 3 2.2 Difficulties in deciding L(/,\,v)}-T ::¢, x So the ... r. Then one defines two things: a degree of the Cut leading to r, and a transformation taking the proof of r to an alternative proof of r, such that ei...

Ngày tải lên: 09/03/2014, 01:20

... the nature of the mapping between c -structure and f- structure enables it to achieve many of the effects o[ discontinuous ¢onstituenta, even though the phrase structure component (the c- structure) ... p.297), the c -structure is relatively impoverished, and the morphology' on the lexica~ items identifies the component of the f -structure they supp...

Ngày tải lên: 31/03/2014, 17:20

... described above. Tethering of both sides of the dimer likely mimics the structure obtained when anchored in the membrane, in accordance with the notion that this structure is the receptor’s normal ... employing soluble forms of the receptor [25,26,34], indicates that the ectodomain of the receptor is capable of dimer forma- tion in the absence of ligand. Af...

Ngày tải lên: 18/02/2014, 08:20

... and Shain, and plotted vs. the inverse of the scan rate. The plots yielded straight lines, confirming the applicability of the Nicholson and Shain theory to the present system, and the variation of the ... concentrations of nitrate [17] and nitrite [18], the pO 2 and the pH of the medium were monitored, and the composition of the gaseous phas...

Ngày tải lên: 07/03/2014, 15:20

... to gene expression. The status of the switch is determined by the state of the upstream regulatory element of the GAL genes in the nucleus. The regulatory protein may bind to the upstream regulatory ... [8,9]. Another mechanism that plays an important role in deciding the status of the switch is the distribution of the protein between the nucleus and cyto...

Ngày tải lên: 07/03/2014, 16:20

... provide further evidence for the role of PPARc in the regulation of TP gene expression within the vasculature and point to further critical differences into the modes of regulation of TPa and TPb ... coincubation with both the PPARc and RXRa proteins with the radiolabelled PPARc ⁄ RXR probe B. On the other hand, neither the individual PPARc2 or RXRa pro- tein...

Ngày tải lên: 07/03/2014, 21:20

... food(Indian), near (The Red Lion)). The order of the constraints in the description was randomised to reduce the effect of priming. The annotators were then asked to align the attributes (e.g., Indicate the ... (9) with P (R|S m ) defined in (2). 3. Retrain the model with the additional k data points. The number of utterances to be queried k should depend on the...

Ngày tải lên: 17/03/2014, 00:20