... performance -based measure and the competence -based concept of produc- tivity. As the growth rate is by definition a performance -based measure, it is not unnatu- ral that the competence -based ... Good & Toulmin (1956) introduced the method of interpolating and extrapolating the number of types for ar- bitrary sample size, but it cannot be used for extrapolating to a v...
Ngày tải lên: 20/02/2014, 18:20
... 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 ... text coherence for electronic essay scoring systems. Natural Language Engineering, 10(01):25–55, March. D. Nicholls. 2003. The Cambridge Learner Corpus: Er- ror coding and analysis for...
Ngày tải lên: 20/02/2014, 04:20
Báo cáo khoa học: "A Latent Dirichlet Allocation method for Selectional Preferences" pptx
... 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), (politician, political is- sue) form ... showed the advantages of this ap- proach over Resnik’s information-theoretic class- based method on a pseudo-disambiguation evalu- ation. These methods obtain better lexical cover- age, bu...
Ngày tải lên: 07/03/2014, 22:20
Tài liệu Báo cáo khoa học: "A Syntax-Driven Bracketing Model for Phrase-Based Translation" pptx
... that the new model outperforms other previous methods and achieves a substantial improvement over the baseline which is not syntactically informed. 1 Introduction The phrase -based approach is widely ... then 8: Update bracketing instances for index j 9: end if 10: end if 11: end for 12: for each j ∈ c do 13: := ∪ {bracketing instances from j} 14: end for 15: Output: bracketing i...
Ngày tải lên: 20/02/2014, 07:20
Tài liệu Báo cáo khoa học: "A Novel Feature-based Approach to Chinese Entity Relation Extraction" ppt
... classification problem. Existing approaches include feature -based and kernel -based classification. Feature -based approaches transform the context of two entities into a liner vector of carefully ... is therefore reasonable to conclude that kernel -based especially tree-kernel approaches are not suitable for Chinese, at least at current stage. In this paper, we study a feature -...
Ngày tải lên: 20/02/2014, 09:20
Tài liệu Báo cáo khoa học: A comparative analysis of the time-dependent antiproliferative effects of daunorubicin and WP631 pdf
... quantified by the Bradford assay (Bio-Rad, Hercules, CA, USA). About 30 lg of denatured proteins were subjected to electropho- resis on SDS-polyacrylamide gels (12% for p53 and 10% for actin), blotted ... Molecular Dynamics densitometer and normalized using actin as reference. Cytological analysis of multinucleated cells For morphological observation of multinucleated cells, a CompuC...
Ngày tải lên: 20/02/2014, 23:20
Báo cáo khoa học: A novel 2D-based approach to the discovery of candidate substrates for the metalloendopeptidase meprin pot
... 15 mA per gel for 1 h 30 min and 50 mA per gel for 5–6 h at 15 °C. For preparative gels, 1 mg of protein was solubilized in 2 mL of buffer for 1 h at room temperature, centrifuged for 30 min at ... applicab- ility of a simple 2D IEF ⁄ SDS ⁄ PAGE -based image analysis procedure to analyse candidate substrates for meprin in a cell culture system -based approach (Figs 1 and 2; Ta...
Ngày tải lên: 07/03/2014, 06:20
Báo cáo khoa học: "A Computational Analysis of Complex Noun Phrase in Messages" docx
... task has been to process them for purposes of dissemina- tion and summarization, and we have developed a proto- type system for this purpose. To capture the information in the narrative, we ... propose a set of semantic relations for complex noun sequences, within a sublanguage analysis, that permits the proper bracketing of modifier and host for correct interpretation of noun...
Ngày tải lên: 08/03/2014, 18:20
Báo cáo khoa học: "A Generalized Vector Space Model for Text Retrieval Based on Semantic Relatedness" pot
... Association for Computational Linguistics A Generalized Vector Space Model for Text Retrieval Based on Semantic Relatedness George Tsatsaronis and Vicky Panagiotopoulou Department of Informatics Athens ... experimental methodology was based only on randomly gen- erated pseudowords of varying sizes. Similarly, Voorhees (1993) reported a drop in retrieval per- formance when the retrieva...
Ngày tải lên: 08/03/2014, 21:20
Tài liệu Báo cáo khoa học: A novel electron transport system for thermostable CYP175A1 from Thermus thermophilus HB27 doc
... The tubes were placed on ice for 5 min, and then centrifuged at 13 000 g for 10 min. The supernatant was directly ana- lyzed by RP-HPLC. The HPLC analysis was performed using an HPLC system (Prominence; ... 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 a...
Ngày tải lên: 18/02/2014, 08:20