Báo cáo khoa học: "Data-Defined Kernels for Parse Reranking Derived from Probabilistic Models" docx

... June 2005. c 2005 Association for Computational Linguistics Data-Defined Kernels for Parse Reranking Derived from Probabilistic Models James Henderson School of Informatics University of Edinburgh 2 ... accuracy of the probabilistic model alone. 2 Kernels Derived from Probabilistic Models In recent years, several methods have been proposed for constructing kernels...

Ngày tải lên: 08/03/2014, 04:22

... A and B as defined above. To formally introduce the aPLSA model, we start from the probabilistic latent semantic anal- ysis (PLSA) (Hofmann, 1999) model. PLSA is a probabilistic implementation ... cluster- ing performance. We observe that the World Wide Web has many annotated images in Web sites such as Flickr (http://www.flickr.com), which can be used as auxiliary information source fo...

Ngày tải lên: 08/03/2014, 00:20

... - $7 are used in the experiment for finding a translation for ~,~,. 8 Results In order to apply the above algorithm to find the translation for ~/liougan from the HKStan- dard/Mingpao corpus, ... nonparallel corpora for terminology translation were constrained by the inadequate availability of same-domain, comparable texts in electronic form. The type of nonparallel texts o...

Ngày tải lên: 08/03/2014, 05:21

... (Fig. 6A,B). TcrPDEC exhibits a K m for cAMP of 31.6 ± 9 lm (N ¼ 6). This is significantly higher than the K m for cAMP observed for a previously characterized PDE from T. cruzi, TcPDE1 [14]. Unexpectedly, ... an unusual PDE from this protozoal organism. This enzyme, TcrPDEC, is a member of the class I PDEs, as determined from the presence of a characteristic signature sequence and...

Ngày tải lên: 19/02/2014, 07:20

... lexicon models lack from context infor- mation that can be extracted from the same paral- lel corpus. This additional information could be: Simple context information: information of the words ... the word pair; Syntactic information: part-of-speech in- formation, syntactic constituent, sentence mood; Semantic information: disambiguation in- formation (e.g. from WordNet), cur- rent/prev...

Ngày tải lên: 20/02/2014, 18:20

... performed in positive reflector mode, collecting data from approximately 3000 and 5000 single laser shots for MS and MS ⁄ MS anal- yses, respectively. Preparation of aggregate-free monomer for fibrillation ... incu- bated for 4 days with each of the peptides (10 lm), and cells were fixed and used for immunocytochemical analyses. Immunocytochemistry Neurons were fixed in 4% paraformaldeh...

Ngày tải lên: 18/02/2014, 13:20

... products to test as substrates for P450scc Minor metabolites of vitamin D3 were purified from 50 mL incubations of 100 lm vitamin D3 with 2 lm P450, as described above for the preparation of 20-hydroxyvita- min ... general accuracy of ± 0.1 °C. Chemical shifts were referenced to 3.31 p.p.m. for proton and 49.15 p.p.m. for carbon from solvent peaks. Initial NMR measurements on the t...

Ngày tải lên: 18/02/2014, 17:20

... context in- formation at the sentence level, we adopt the topical context information in our method for the following reasons: (1) the topic informa- tion captures the context information beyond the ... clustered from the corpus C f out , and t f in represents the topic derived from the corpus C f in . However, the two above-mentioned probabilities can not be directly multiplied in fo...

Ngày tải lên: 19/02/2014, 19:20

... labelled information for training. Our sys- tem extracts transliteration pairs in an unsupervised fashion. It is also able to utilize labelled information if available, obtaining improved performance. We ... of the Association for Computational Linguistics, pages 469–477, Jeju, Republic of Korea, 8-14 July 2012. c 2012 Association for Computational Linguistics A Statistical Model for...

Ngày tải lên: 19/02/2014, 19:20

... train- ing sets for English and Dutch from the CELEX European lexical resource, and achieve error rates for English of less than 0.1% for correctly allowed hyphens, and less than 0.01% for Dutch. ... available for choosing values for these parameters. For En- glish we use the parameters reported in (Liang, 1983). For Dutch we use the parameters reported in (Tutelaers, 1999)....

Ngày tải lên: 20/02/2014, 04:20