Báo cáo khoa học: "Extraction of definitions using grammar-enhanced machine learning" pdf

... extract definitions of four types using a combination of a rule-based grammar and machine learning. We col- lected a Dutch text corpus containing 549 definitions and applied a grammar on it. Machine ... Proceedings of the EACL 2009 Student Research Workshop, pages 88–96, Athens, Greece, 2 April 2009. c 2009 Association for Computational Linguistics Extraction of definitions...

Ngày tải lên: 08/03/2014, 21:20

... plausible readings of the sentences, and c's are representations of b's in CDCL. (5) a. "5 students ate 4 slices of pizza." b. Each of the 5 students ate 4 slices of pizza one ... details of CDCL expressed in a context-free grammar. 2 (6) a. "5 dogs had (a litter of) 4 puppies." b. Each of the 5 mother dogs delivered a litter of 4 puppies...

Ngày tải lên: 17/03/2014, 08:20

... dataset. The rest of this paper is organized as follows. Section 2 describes Japanese predicate structure, our graph expression of it, and our improved method. The results of experiments using the NAIST ... the rule candidates. Table 1: Data distribution Training Test # of Articles 95 74 # of Sentences 1,129 687 # of Predicates 3,261 2,038 # of Arguments 3,877 2,468 Nom. 1,717...

Ngày tải lên: 20/02/2014, 04:20

... Performance Firstly, we present the evaluation of the performance of ASTRL from the point of view of relation ex- traction. After learning the STRs for the different comma types using the gold standard parses, ... effects of inclusion of our approach on the performance of Textual Entailment systems; (ii) using features other than those derivable from syntactic parse and name...

Ngày tải lên: 17/03/2014, 02:20

... structure of a new node created by substitution inherits the union of the features of the original nodes. The top feature of new node is the union of the top features (f 1 ∪ f) of the two ... Tree- bank A feature structure is a way of representing gram- matical information. Formally feature structure consists of a specification of a set of features, each of which is...

Ngày tải lên: 23/03/2014, 18:20

... Zagibalov Department of Informatics University of Sussex United Kingdom T.Zagibalov@sussex.ac.uk Abstract This paper presents the results of experi- ments in which we tested different kinds of features ... different kinds of features for retrieval of Chinese opinionated texts. We assume that the task of retrieval of opinionated texts (OIR) can be regarded as a subtask of gen...

Ngày tải lên: 20/02/2014, 12:20

... Proceedings of the 12th Conference of the European Chapter of the ACL, pages 238–245, Athens, Greece, 30 March – 3 April 2009. c 2009 Association for Computational Linguistics Effects of Word Confusion ... networks, the accuracy of the query parser can be improved. We further investigate the effect of this improvement on the search task and demonstrate the benefit of tighter cou...

Ngày tải lên: 08/03/2014, 21:20

... possessing a center of symmetry.” The error was the result of the rather uncommon use of the Russian word число to mean “group” instead of “number.” To eliminate this type of error, some of the rarer ... on the part of human translators. The crude examples of machine translation pre- sented above were produced with only a minimum of use of Russian grammar, namely...

Ngày tải lên: 16/03/2014, 19:20

... a study of the advantages of Winnow, see (Littlestone, 1988; Kivinen and Warmuth, 1995). 3 The POS Problem Part of speech tagging is the problem of iden- tifying parts of speech of words ... one of the fundamental disambigua- tion problems in natural language: part -of speech tagging. Part of Speech tagging (POS) is the problem of assigning each word in a sentence t...

Ngày tải lên: 23/03/2014, 19:20

... "She didn't book a trip." Part -of- speech tagging is the prob- lem of determining the syntactic part of speech of an occurrence of a word in context. In any given English text, ... 6,229,504 different or- der 3 combinations of tags (of course not all of these will actually occur, see (Weischedel et al., 1993)). Because of the large number of param- ete...

Ngày tải lên: 23/03/2014, 20:21