Báo cáo khoa học: "Joint Hebrew Segmentation and Parsing using a PCFG-LA Lattice Parser" docx

... unlexicalized, treebank-derived gram- mars, and showed that better grammars contribute to better segmentation accuracies. Goldberg et al. (2009) showed that segmentation and parsing ac- curacies can ... Hebrew Segmentation and Parsing using a PCFG-LA Lattice Parser Yoav Goldberg and Michael Elhadad Ben Gurion University of the Negev Department of Computer Science P...

Ngày tải lên: 17/03/2014, 00:20

... Treebank data, the joint model gave an error reduction of 14.6% in segmentation accuracy and 12.2% in the overall segmentation and tagging accu- racy, compared to the traditional pipeline approach. In ... language modeling and utterance classifica- tion (Saraclar and Roark, 2005) and labeling and chunking (Shimizu and Haas, 2006). Though our model is built specifically for Chi...

Ngày tải lên: 20/02/2014, 09:20

... discarded, leaving a set of 202 words (the “gold standard”) on which at least 3 of the 4 annotators agreed. The best agreement between the gold standard and a human annotator was 0.87 kappa, ... likelihood estimators (MLE) for estimating the parameters (p, Θ z ). The MLEs for Bernoulli and MVN parameters have analytical solutions. Dirichlet parameters were es- timated using a...

Ngày tải lên: 31/03/2014, 00:20

... error and the standard deviation. The largest average er- ror happens with the data annotated with multiple dialogue acts. In that case, the extracted segments have a starting and ending point that ... di- alogue act, and 375 utterances contain multiple dia- logue acts, according to manual dialogue act anno- tation. Within the set of utterances that contain mul- tiple dialogue acts, t...

Ngày tải lên: 07/03/2014, 22:20

... detec- tion and tracking, and one segment of the text. In order to annotate unambiguously, we need to detect and track both landmarks and actions. A landmark is a hallway or a door, and an action is a ... 7 Table 1: Example Parts: linear-chain CRFs involves exactly one landmark, we can label the segment with an action and a specific landmark. For example, GHR1 := ”advanc...

Ngày tải lên: 17/03/2014, 04:20

... to PoS tagging errors, and its gener- alization capability even with a reduced number of lexical features. Another implication of this data is that commas and quotation marks play a major role ... to another language: (1) acquiring high quality anno- tated data; (2) adapting the English task definition to the nature of a different language, and (3) adapt- ing the algorithm to the n...

Ngày tải lên: 23/03/2014, 18:20

... Strongylocentrotus purpureus and F. scutaria larvae sequences have a H64 also shared by A. gambiae, A. aegypti, T. gigas, D. melanogaster-2 and D. melanogaster-3 sequences (data not shown). By contrast, R. pachyptila amino acid ... GTT ACT TCC GCA GCT AGG 466–483 Probe amplification for FISH RpCAbrF TAC AAG GAT GCC ATT AGC 613–630 RpCAbrR1 CGT AGC AGT ATC AGC AGT 822–839 RpCAtrFprobe T...

Ngày tải lên: 18/02/2014, 16:20

... electron into an amide carbonyl group that is hydrogen bonded to the protonated side chain of a basic amino acid. The resulting radical anion abstracts a proton and gen- erates a radical site that triggers ... to a mass spectrometer equipped for ESI; (c) fragmentation of individual peptides by collision-acti- vated dissociation (CAD); and (d) a search of the resulting tandem mas...

Ngày tải lên: 18/02/2014, 16:20

... vector] as 5¢-primer and 5¢-TCTCCGTAGG GGAGACAAAAGT-3¢,5¢-ATCCCGCGGGGGAAACCT CATC-3¢ and 5¢-CTGTTTGGAC GAACGCAAGATG-3¢ as 3¢-primers for C53S, C175S and W88F variants, respec- tively (mutated codons ... such as reductants and ROS. An imbalance between these dual functions is probably associated with many human pathologies, such as thyroid tumors, breast and lung cancer, Alzheimer’s...

Ngày tải lên: 18/02/2014, 17:20

... off-line) material in foreign languages. It consists of a hand-held scanner and sophisticated parsing and translation software to provide readers a limited number of translations selected on the basis of a ... terminological help based on a full linguistic analysis of the source material. TwicPen uses a very similar technology, but is available on per- sonal computers (or even...

Ngày tải lên: 20/02/2014, 12:20