Tài liệu Báo cáo khoa học: "Answering Opinion Questions with Random Walks on Graphs" docx

... informa- tion and opinion information. In this pa- per, we propose an Opinion PageRank model and an Opinion HITS model to fully explore the information from different re- lations among questions and ... system. For non-English opinion QA, (Ku et al., 2007) creates a Chinese opinion QA corpus. They classify opinion questions into six types and construct three components to retr...

Ngày tải lên: 20/02/2014, 07:20

... valuable resource for such an application. Another interesting application is mining online discussions. A threaded discussion is an electronic discussion in which software tools are used to ... method only considers the words it could assign a non-zero orientation value. If we consider all words, the accuracy will drop to around 61%. 4.1.1 Varying Parameters As we mentioned in Section 3.4, ....

Ngày tải lên: 20/02/2014, 04:20

... to increase enzyme activity, substrate concentration or coenzyme concentration alone but, instead, to increase all of these parameters in conjunction with each other ODE ss, sim, sens GEPASI ... essence, the common acetaldehyde concentration can be modeled as a small perturbation on the ’pacemaker’, whose effect on the period of the oscillations of cells in the same suspension is indeed...

Ngày tải lên: 14/02/2014, 14:20

... (2000) Nucleated conformational conversion and the replica- tion of conformational information by a prion determi- nant. Science 289, 1317–1321. 99 Wood SJ, Wypych J, Steavenson S, Louis JC, Citron M & ... the activation energy of 28 ± 3 kcalÆmol )1 observed for the P79S mutant tetramer formation is consistent with the contribution of one proline isomerization event, most likely the con...

Ngày tải lên: 14/02/2014, 18:20

... reaction (a) in Scheme 1) for HSA-heme-Fe(III) nitrosylation were obtained by mixing the HSA-heme-Fe(III) solution (final concentration 3.3 · 10 )6 m) with the NO solution (final concentration, 3.0 ... 10 )6 m) with the NO solution (final concentration, 1.2 · 10 )5 to 4.0 · 10 )4 m) under anaerobic conditions. No gaseous phase was present. HSA-heme-Fe(III) reductive nitrosylation was monitor...

Ngày tải lên: 16/02/2014, 14:20

... scaffold generated by rational recon- struction, and the regulation of catalytic activity by a conformational transition. We prepared a DNA-cleav- ing DNAzyme, using a deoxyribonucleotide residue grafting ... the CuCl 2 concentration was varied from 1 to 10 mM. The reactions were conducted at pH 7.0 (30 mM Hepes) and 23 °C with 0.3 M NaCl and 10 lML-ascorbate. In (B), the reactions were con...

Ngày tải lên: 16/02/2014, 15:20

... the vacuole without harmful effects on the parasite. Under physiological concentrations, histatin-5 induces a concentration-dependent perturbation at a spatially restricted site on the cell surface ... the decrease of mitochondrial ATP synthesis through inhibition of F 1 F 0 -ATPase. Concurrent with the internalization and accumulation, rapid expansion of the vacuole with a parallel l...

Ngày tải lên: 18/02/2014, 06:20

... G1 checkpoint [13]. Phosphorylation of CDK4 on Y17 has also been detected in cells entering quiescence in response to contact inhibition, serum starvation and treatment with transforming growth factor ... compilation ª 2008 FEBS CDK4 on Y17 in cells. The kinase dead version of C-YES did not increase the level of Y17 phosphoryla- tion (Fig. 5B), confirming that the phosphorylation of CDK4...

Ngày tải lên: 18/02/2014, 18:20

... a 2.32 A ˚ con- tact with S c , a 2.21 A ˚ contact with O d 1 and a 1.81 A ˚ contact with O d 2 of the cysteine sulfonic acid. In addi- tion to these contacts, there is a 1.82 A ˚ contact between ... closed P-loop conformation is stable over a broad ionic strength range. Structure of PhyAsr upon oxidation of the catalytic cysteine A systematic comparison of the open P-loop confor- matio...

Ngày tải lên: 18/02/2014, 18:20

... complexes [10]. In addition, interactions of the p53 protein with cer- tain response elements can be controlled by changes in DNA topology inducing formation of non-B DNA structures within the binding ... within p53DBS can therefore be expected to cause severe deformations of the binding site with con- comitant destabilization of the p53–DNA interaction (or even prevention of target recog...

Ngày tải lên: 19/02/2014, 05:20