Tài liệu Báo cáo khoa học: "Improved Unsupervised POS Induction through Prototype Discovery" ppt

... Clustering Evaluation: New Measures and a POS Induction Case Study. CoNLL ’10. Roi Reichart, Raanan Fattal and Ari Rappoport, 2010b. Improved Unsupervised POS Induction Using In- trinsic Clustering ... Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics Improved Unsupervised POS Induction through Prototype Discovery Omri Abend 1∗ Roi Reichart 2 Ari R...

Ngày tải lên: 20/02/2014, 04:20

... phrase-based SMT to find P (e|f , θ) and concentrate on creating a model for P (θ|E, F). We decompose this posterior prob- ability using Bayes law into the corpus likelihood and parameter prior probabilities P ... model. A generative probabilistic model where longer units are built through the binary combination of shorter units was proposed by de Marcken (1996) for monolingual word segmen...

Ngày tải lên: 20/02/2014, 04:20

... N- gram length proposed by Ney et al., 2. A single discount used for all N-gram lengths, optimized on held-out data, 3. The three theory-based discounts for each N- gram length proposed by Chen and ... N-gram lengths. As an a priori “theory”-based estimate, we assume that, since the distance be- tween possible N-gram counts, after discounting, is approximately 1.0, their mean quantization err...

Ngày tải lên: 20/02/2014, 09:20

... constituent-context model for improved grammar induction. In Proceedings of ACL 40, pages 128–135. Dan Klein and Christopher D. Manning. 2004. Corpus- based induction of syntactic structure: Models ... the lexical entry of x should collect statistics about each of the adjacency positions of x. As seen above, adjacency positions may move, so the learner waits until the parser com- pletes pa...

Ngày tải lên: 20/02/2014, 12:20

... (A&L) NEGATIVE (K&S) CAUSAL - (SEMANTIC PRAGMATIC ) - POSITIVE (K&S) Table 1: Relation definitions as union of definitions proposed by other researchers (M&T – (Mann and Thompson, 1988); ... access to semantic interpreters and general purpose knowledge bases that would support these kinds of inferences. The discourse relation definitions proposed by Computational Linguistics (AC...

Ngày tải lên: 20/02/2014, 21:20

... of switches. The fold induction with this new switch is higher when compared to the fold inductions observed for CfVgRXR and CfVgRXRdel versions of switches. The lower fold induction in the case ... ligand sensitivity and the CfE(CDEF) truncation showed the maximum induction. Rapid induction and turn off of reporter gene activity through the G:CfE(DEF) + V:MmR(EF) switch The best tw...

Ngày tải lên: 21/02/2014, 00:20

... cyclopropanation was shown to alter cording properties and reduce virulence [14]. Using whole genome transpositional mutagenesis techniques, 30 mutants of M. tuberculosis were selected from a total screen ... advantage of selective receptor-mediated intracellu- lar survival as a pathogenic strategy. It is possible that the distinct routes of entry of M. tuberculosis result in different cytoki...

Ngày tải lên: 16/02/2014, 15:20

... MS instrument (Axima-CFR; Shimadzu Biotech, Manchester, UK) utilized for post- source decay experiments was purchased through a Griffith University Infrastructure grant provided to Simin D. Maleknia. References 1 ... [5,6,37]. The WT contains methionine at posi- tions )1 (methionine resulting from the recombinant preparation) and 13. V30M TTR contains an additional methionine at position 30...

Ngày tải lên: 19/02/2014, 05:20

... the serum up to 5 weeks postinfection. Thereafter, infection was cleared without signs of liver inflammation. The described cell culture systems are an important breakthrough in HCV research and ... effect. These data suggest, that clinical isolates can interact with SR-BI through associated lipoproteins and not through E2. LDL receptor Most mammalian cells take up lipoprotein particles su...

Ngày tải lên: 19/02/2014, 06:20

... Frings, J. & Schink, B. (1999) Net synthesis of acetate from CO 2 by Eubacterium acidaminophilum through the glycine reductase pathway. FEMS Microbiol. Lett. 177, 1–6. 32. Roy, R., Mukund, S., ... J. Bacteriol. 181, 1171–1180. 33. Reitzer, L. & Schneider, B.L. (2001) Metabolic context and possible physiological themes of sigma (54) -dependent genes in Escherichia coli. Microbiol. Mo...

Ngày tải lên: 19/02/2014, 12:20