Báo cáo khoa học: "Automatic Grammar Induction and Parsing Free Text: A Transformation-Based Approach" pptx

... brill@unagi.cis.upenn.edu Abstract In this paper we describe a new technique for parsing free text: a transformational grammar I is automatically learned that is capable of accu- rately parsing text into binary-branching ... Automatic Grammar Induction and Parsing Free Text: A Transformation-Based Approach Eric Brill* Department of Computer and Informati...

Ngày tải lên: 31/03/2014, 06:20

... Constraints Kuzman Ganchev and Jennifer Gillenwater and Ben Taskar Department of Computer and Information Science University of Pennsylvania, Philadelphia PA, USA {kuzman,jengi,taskar}@seas.upenn.edu Abstract Broad-coverage ... rules for aux- iliary verb analysis. We evaluate our ap- proach on Bulgarian and Spanish CoNLL shared task data and show that we con- sistently outperform un...

Ngày tải lên: 20/02/2014, 07:20

... (Kanji) 12 and two kinds of Japanese characters (Hira-gana and Kata-kana). Most Kanji have multiple readings, and correct readings can only be decided according to context. Conventional ... and conversational speech recognition using an Air Travel Information System (ATIS) task were actively investigated. More recent DARPA programs are the broadcast news dictation and natural...

Ngày tải lên: 20/02/2014, 18:20

... uaining data number of brackets in the WSJ training data (a) (b) Figure 2: Parsing accuracies of (a) directly induced grammars and (b) adapted grammars as a function of the number of brackets ... notions and then use the re- estimation procedure to fine-tune the parame- ters, substituting the cost of hand-labeled train- ing data with that of hand-coded grammar. Our idea of g...

Ngày tải lên: 20/02/2014, 19:20

... instance, Daum´e and Marcu’s model assumes as input a corpus annotated with both MD and coreference information. On the other hand, we tackle coreference and SC induction separately (rather than ... of the ACE Phase 2 evaluation involves classifying an NP as PERSON, ORGANIZATION, GPE (a geographical-political re- gion), FACILITY, LOCATION, or OTHERS. We adopt a corpus-based appro...

Ngày tải lên: 17/03/2014, 04:20

... 163 verbal subcategorisation classes by means of a statistical shallow parser, a classifier of subcategorisation classes, and a priori estimates of the probability that any verb will be a member of ... Large-Scale Induction and Evaluation of Lexical Resources from the Penn-II Treebank Ruth O’Donovan, Michael Burke, Aoife Cahill, Josef van Genabith, Andy Way National Centre for La...

Ngày tải lên: 17/03/2014, 06:20

... hierarchical regularization as described here and the addition of new tied features in a “flat” model with zero-meaned Gaussian regularization on all parameters. In particular, instead of param- eterizing ... tagging: A Bayesian non-parametric approach. In North Amer- ican Chapter of the Association for Computational Linguistics. N. Xue, F-D Chiou, and M. Palmer. 2002. Building a lar...

Ngày tải lên: 30/03/2014, 21:20

... extracted to form a potential chunk grammar and the adjacent tree structures are also extracted to form a potential context chunk grammar. After the training process, total 10937 chunk grammar ... Semantic head is the head of a phrase according to the semantic usage; but syntactic head is the head based on the grammatical relations. Both the syntactic head and the semanti...

Ngày tải lên: 31/03/2014, 06:20

... r,F-0al[~d A ~ A ! [E] &apos ;A k A rI -A A [A] I- B [Caq A[ F] b B In these rules i, j and k range over I, `7 and JC, respectively, and 1 ranges over `7 U/U. As before, a I indicates that ... The last decade has seen a keen revival of investi- gations into the suitability of using categorial gram- mars as theories of natural language syntax and se- mantics....

Ngày tải lên: 01/04/2014, 00:20

... potential errors (bias and random error) related to data based on clinical examina- Acta Veterinaria Scandinavica 2009, 51:36 http://www.actavetscand.com/content/51/1/36 Page 7 of 10 (page number ... of variation and bias in relation to monitoring of animal disease incidence on herd and national level, causal analysis on national level, as well as estimation of validated treatment crite...

Ngày tải lên: 25/10/2012, 10:45