Báo cáo khoa học: "Treebank Grammar Techniques for Non-Projective Dependency Parsing" pot

... 478–486, Athens, Greece, 30 March – 3 April 2009. c 2009 Association for Computational Linguistics Treebank Grammar Techniques for Non-Projective Dependency Parsing Marco Kuhlmann Uppsala University Uppsala, ... computes this transformation for a large, empirically relevant class of grammars. 1 Introduction Dependency parsing is the task of predicting the most probable depen...

Ngày tải lên: 31/03/2014, 20:20

... inverse trans- formation for PADT more problematic than for the other treebanks. The absence of a positive effect for PADT is therefore understandable given the deeply nested non-projective constructions ... allowed, which pose a problem for projective dependency parsers. Direct non-projective parsing can be performed with good accuracy, e.g., using the Chu-Liu-Edmonds al- 1 If...

Ngày tải lên: 17/03/2014, 04:20

... ☎ ❄ NMOD NN markets ✞ ☎ ❄ PMOD . . ❄ ✞ ☎ P Figure 1: Dependency graph for an English sentence from the WSJ section of the Penn Treebank require non-projective dependency arcs. For the purpose of this paper, however, ... that SVM outperforms MBL for the three most com- plex models Φ 3 , Φ 4 and Φ 5 , both for English and Chinese. The results for Swedish are less clear, although...

Ngày tải lên: 23/03/2014, 18:20

... error reduction. Results are for dependency parsing on the dev set for iters:5,training-k:1. tal errors break down by gold head. For example, the 12.1% total error reduction for attachments of an IN ... compute features for the full parsing task. To show end-to-end effectiveness, we incor- porate our features into state-of-the-art dependency and constituent parsers. For the d...

Ngày tải lên: 20/02/2014, 04:20

... that the LinguaStream platform promotes the combination of purely declarative formalisms (when GATE is mostly based on the JAPE language and NOOJ focuses on a unique formalism), and allows processing ... analy- sis models and methodological concerns. Finally, when other platforms usually enforce the use of a dedicated document format, LinguaStream is able to process any XML document. On the o...

Ngày tải lên: 22/02/2014, 02:20

... into discussion of the under- lying complexity, for which we unfortunately do not have space here, we give an exter- nal form of a lexical entry for some of the senses of the German verb traeumen. ... subscripts. Three other special symbols are used: + stands for the unifica- tion operator * stands for top, the underdefined element. # stands for bottom, the overdefine...

Ngày tải lên: 22/02/2014, 10:20

... compo- nent describing their functional structure. For the rule for S, for instance, we add an ele- ment describing what the SUBJECT and PRED are for. We could say that the SUBJECT is the theme ... complete formal paraphrase of (1) must include at least as much information as we have given above. In particular, the logical structure of our para- phrases contains essential inform...

Ngày tải lên: 22/02/2014, 10:20

Ngày tải lên: 08/03/2014, 01:20

... task outperforms the other machine learning techniques investigated. In the monolingual task, the approach per- forms as well as the state-of-the-art sys- tems which reported results for the same ... customized for this monolingual task, the ILP approach signif- icantly outperforms the majority sense baseline and performs as well as the state-of-the-art system re- porting results fo...

Ngày tải lên: 08/03/2014, 02:21

... (1975), have been put forward, all of which have Zipf's law as some special or limiting form. Unrelated to Zipf's law is the lognormal hypothesis, advanced for word fre- quency ... matrix 7 ) defines a uniform distribu- tion (all pi# equal), we immediately have that the expected neighborhood density for length rnl is identical for all targets Yt, while for length m~...

Ngày tải lên: 08/03/2014, 07:20