Báo cáo khoa học: "LR Parsers For Natural Languages" pot

... UIIman [4]. The LR parsers have seldom been used for Natural Language Processing probably because: 1. It has been thought that natural languages are not context-free, whereas LR parsers can deal ... tree. This fact is desirable for progralnming languages. For natural languages, however, it is sometimes necessary for a parser to produce more than one parse tree. For e...

Ngày tải lên: 24/03/2014, 01:21

Ngày tải lên: 31/03/2014, 17:20

... (Shieber et al., 1995), where items are called formula schemata, deduc- tion steps are inference rules, hypothesis are ax- ioms and final items are goal formulas. A parsing schema can be generalized ... taken place in the node N r and therefore further adjunctions on the same node are forbidden. A value of false indicates that no adjunction was performed on that node. In this case,...

Ngày tải lên: 22/02/2014, 03:20

... initially to be uniform 2. for several iterations do: a. set up a count( , ) table with zero entries b. for = 1 to Q[ ,1] = b( boundary) c. for = 2 to for = 1 to Q[ , ] = 0 for = 1 to Q[ , ] += ... 1 to Q[ , ] += Q[ , ] b( ) s( ) d. for = 1 to R[ , ] = b(boundary ) e. for = to 1 for = 1 to R[ , ] = 0 for = 1 to R[ , ] += R[ , ] b( ) s( ) f. for = 1 to for = 1 to count( ,...

Ngày tải lên: 08/03/2014, 02:21

... syntac- tic information for transforming constituency tree- banks to dependency structures (Nivre et al., 2007) or richer syntactic representations (e.g., Hocken- maier and Steedman, 2007). For the ... approach of using EM for induc- ing latent information in treebanks has led to extremely ac- curate constituency parsers, that neither make use of nor pro- duce headedness information; s...

Ngày tải lên: 08/03/2014, 21:20

... semantic informa- tion. Word sense disambiguation for the bases and derived forms that could not be resolved using part- of-speech tags was not performed. However, there exist systems for such ... the morphological analyzer. For example, -Nize could not be stripped from hypoth- esize because Alvey failed to reconstruct hypothesis from hypothes. However, for the affixes d...

Ngày tải lên: 17/03/2014, 09:20

Ngày tải lên: 18/03/2014, 02:20

... shown for increasing values of n. The trends for CLANG and GEOQUERY are different: small values of n show significant im- provements for CLANG, while a larger n is needed to improve results for ... ap- plications, an interpreter for coaching in- structions in robotic soccer and a natural- language database interface. The results show that reranking can improve the per- formance on...

Ngày tải lên: 23/03/2014, 18:20

... logical form. ~ l~'ocsedings, 191h Annual Meeting of th, e Association for Computational Linguistics, Stanford, July 1981. 117-124. PARTEE, Baabara Hall (1973). "Some transformational ... (1982). Strategies for natural language processing. Hlllsdale, N J: Lawrence Erlbaum Associates, 1982. MARCUS, Mitchell P (1980). A theory of sgntactic recognition for natv.ra...

Ngày tải lên: 31/03/2014, 17:20

... notions of formal power. The close link between restricted forms of non- projective dependency languages and mildly context- sensitive grammar formalisms provides a promising starting point for future ... non-projectivity are discouraging: While grammar-driven dependency parsers that are restricted to projective structures can be as efficient as parsers for lexicalized context-free gra...

Ngày tải lên: 17/03/2014, 04:20