Báo cáo khoa học: "Semi-supervised Dependency Parsing using Lexical Affinities" doc

... Japanese dependency parsing by using large-scale statistical information. It takes into account two kinds of informa- tion not considered in previous statistical (machine learning based) parsing ... automatic dependency parsing of large-scale corpora. The results of an experiment in which our method was used to rerank the results obtained using an existing machine learning based...

Ngày tải lên: 20/02/2014, 12:20

... Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics Semi-supervised Dependency Parsing using Lexical Affinities Seyed Abolghasem Mirroshandel †, Alexis Nasr † Joseph Le Roux  † Laboratoire ... ways to in- tegrate the lexical affinities in the parser and reports the results obtained with the three methods. 2 Previous Work Coping with lexical sparsity of treeban...

Ngày tải lên: 30/03/2014, 17:20

... the last one because some of the last segments are self- dependent. 3.2 Accuracy of Dependency Parsing Dependency parsing was carried out by combining training and test corpora. We used a window ... amount of documents directly published by end users is increasing along with the growth of Web 2.0. Such documents of- ten contain spoken-style expressions, which are difficult to analyze...

Ngày tải lên: 31/03/2014, 01:20

... shows how to use the subtree information on the target side. 3 Dependency parsing For dependency parsing, there are two main types of parsing models (Nivre and McDonald, 2008; Nivre and Kubler, ... features (Carreras, 2007) in the MST parsing algorithm. 3.1 Parsing with monolingual features Figure 3 shows an example of dependency pars- ing. In the graph-based parsing model, f...

Ngày tải lên: 16/03/2014, 23:20

... outgoing dependency links. In the rest of this paper, we first give a very brief overview a general model of statistical depen- dency parsing and then introduce three models for dependency parsing ... for Czech, among others. Dependency grammars represent the structure of the sentences by positing binary dependency relations between words. For instance, Figure 1 Figure 1: Dependen...

Ngày tải lên: 22/02/2014, 02:20

... principle, dependency parsing offers good prospects for experimenting with word-to-word-semantic relationships. We present a set of experiments using semantic classes in dependency parsing of ... training dependency parsers, using word clusters derived from a large unannotated corpus as features. They demonstrate the effective- ness of the approach in a series of dependenc...

Ngày tải lên: 17/03/2014, 00:20

... introduces a dependency- based grammar and the associated parser and focusses on the problem of determinism in parsing and recovery from errors. First, it is shown how dependency- based parsing can ... suggested. THE BASIC PARSING ALGORITHM The parser has been devised for a system that works on the Italian language. The structure that results from the parsing process is a d...

Ngày tải lên: 23/03/2014, 20:20

... observation of a document and the step of generat- ing a title from the estimated information source, but it was for English documents. 1.1 Headline Length One of the tasks of the Document Understanding ... contains almost two million documents with nearly 600 million words. For this work, 260 documents were selected from the cor- pus based on the following steps: • 3170 documents were...

Ngày tải lên: 20/02/2014, 05:20

... that achieve similar results. 4 Building up discourse trees 4.1 The rhetorical parsing algorithm The rhetorical parsing algorithm is outlined in figure 2. In the first step, the marker and clause ... the notion of rhetorical parsing, i.e., the process through which natural language texts are au- tomatically mapped into discourse trees. In order to make rhetorical parsing work, w...

Ngày tải lên: 22/02/2014, 03:20

... defined a lexical chain within Roget’s very gen- eral hierarchy, in which lexical relationships are traced through a common category. Hirst and St-Onge (1997) define a lexical chain using the ... of reference and lexical semantic relations (superordinate and subordinate). Morris and Hirst (1991) suggested building lexical chains is important in the resolu- tion of lexical...

Ngày tải lên: 08/03/2014, 02:21