Báo cáo khoa học: "A Latent Dirichlet Allocation method for Selectional Preferences" pptx

... 424–434, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics A Latent Dirichlet Allocation method for Selectional Preferences Alan Ritter, Mausam and Oren Etzioni Department ... as information about which topics one of the arguments favors can help inform the topics chosen for the other. For example, class pairs such as (team, game), (politici...

Ngày tải lên: 07/03/2014, 22:20

... Hindle’s (1990) and Lin’s (1998) mutual information-based metrics. We write f for fre- quency, I for mutual information, and R(w) for the set of arguments r p for which w occurs as a headword. In ... similar- ity, the model had an error rate of 0.1858 for uniform weights, 0.1874 for frequency weight- ing, and 0.1806 for discriminativity. For other similarity metrics the result...

Ngày tải lên: 23/03/2014, 18:20

... Introduction Recently, several latent topic analysis methods such as Latent Semantic Indexing (LSI) (Deerwester et al., 1990), Probabilistic LSI (pLSI) (Hofmann, 1999), and Latent Dirichlet Allocation (LDA) ... between the proposed method and representative summa- rization methods which do not deal with latent topics. As representative summarization methods to compare our metho...

Ngày tải lên: 23/03/2014, 16:20

... of the Association for Computational Linguistics, pages 180–189, Portland, Oregon, June 19-24, 2011. c 2011 Association for Computational Linguistics A New Dataset and Method for Automatically ... analyses of the perfor- 180 mance of individual systems, as yet there is no pub- lically available shared dataset for training and test- ing such systems and comparing their performance....

Ngày tải lên: 20/02/2014, 04:20

Ngày tải lên: 09/03/2014, 01:20

... Association for Computational Linguistics, pages 1512–1521, Uppsala, Sweden, 11-16 July 2010. c 2010 Association for Computational Linguistics A Generalized-Zero-Preserving Method for Compact ... join of u, v ∈ X, if one exists, and u  v for the greatest lower bound or meet. If we need a second partial order, we use  for its order relation and  for its join operation. We are...

Ngày tải lên: 17/03/2014, 00:20

... defin- ing the feature vector is needed for the search in Section 3: the contribution of the ’negative’ fea- tures for c = 0 is only computed when Eq. 1 is evaluated for the highest scoring final hypothesis in ... In the feature vector f (c, S, T ), each feature f i occurs potentially twice, once for each class c ∈ {0, 1}. For the feature vector f(c = 1, S, T ), all the fea- ture valu...

Ngày tải lên: 17/03/2014, 02:20

... generator for string transformations. In Proceedings of the Conference on Empirical Methods in Natural Language Processing, EMNLP ’08, pages 447–456, Morristown, NJ, USA. Association for Com- putational ... of the Association for Computational Linguistics, pages 52–61, Portland, Oregon, June 19-24, 2011. c 2011 Association for Computational Linguistics A Fast and Accurate Method f...

Ngày tải lên: 30/03/2014, 21:20

... There- fore, these results clearly indicate that the electron transport system for CYP175A1 is composed of Fdx, FNR, and NADPH (Fig. 4B). All quantitative analyses were performed at 65 °C for 2 ... via OFOR and Fdx to CYP119 [13,14]. Inter- estingly, the electron transport system for CYP175A1 did not utilize OFOR, although the T. thermophilus HB27 genome contains the genes encoding OFOR...

Ngày tải lên: 18/02/2014, 08:20

... titration method. The concentration of Tc was determined in 0.1 M HCl using an excitation coefficient e 355nm ¼ 13320 M )1 Æcm )1 [16]. All measurements for unliganded protein were performed in ... process, R is the gas constant, and A is equal to 4.0 for monomer or for nondissociated dimer [19]. Circular dichroism CD measurements were performed on a Jasco-710 spectro- polarimeter equip...

Ngày tải lên: 20/02/2014, 02:21