Báo cáo khoa học: "Less is more: Eliminating index terms from subordinate clauses" pdf

... with eliminating terms from a conventional statistical engine, combining this technique with the standard method of eliminating high frequency index terms Rather than eliminating terms from ... document index with a second index that contains linguistically- informed terms. Two types of terms are stored in this linguistic index: 1. LF triples. These are subgra...

Ngày tải lên: 31/03/2014, 04:20

... width is 2.195m, minimal is 88cm. • Average: Estimated avg. car width is 1.7m. • Direct/indirect comparisons: Toyota Corolla is wider than Toyota Corona. • Distribution: Car width is distributed ... can add terms appearing in the question and having a strong PMI with the ob- ject (this can be estimated using any fixed corpus). However, this is not essential. We then extract new...

Ngày tải lên: 20/02/2014, 04:20

... char- acteristics. Second one is likely that the long- distance dependency and sparseness problem de- grade the performance of adverbials greatly. This can be viewed from the statistics in Table ... which is the percentage of chunks in the data that are found by the tagger; and F-score which is equal to 2×precision×recall/(precision+recall). Un- der the “IOB” tagging scheme, a functio...

Ngày tải lên: 08/03/2014, 01:20

... its Ap- plications, Issue 2, pp. 224–242. Chris Callison-Burch. 2008. Syntactic Constraints on Paraphrases Extracted from Parallel Corpora. Proc. EMNLP, pp. 196–205. Chris Callison-Burch, Cameron ... s  ) is greater than some threshold σ (see Section 4.1). If two phrases that satisfy condition (b) and have trans- lations in more than one common target cluster, a distinct such edge is e...

Ngày tải lên: 17/03/2014, 22:20

... cd 1 (His200) is conserved in NirF (His41); this conservation applies to all other NirF sequences known in the database (Fig. S2). How- ever, the other catalytic site histidines (His 345 and His388) ... not shown). His200 of P. pantotrophus NirS is conserved between NirF and NirS; it is the His residue that in NirS is the proximal axial ligand to the d 1 heme. Replacement of an equiva...

Ngày tải lên: 15/02/2014, 01:20

... not inhibit the catalysis of disulfide bond formation and isomerization by PDI PDI is a catalyst of thiol–disulfide exchange reactions, including oxidation, reduction and isomerization [1]. The ... Morrison TG (2007) Thiol ⁄ disulfide exchange is required for membrane fusion directed by the newcastle disease virus fusion protein. J Virol 81, 2328–2339. 13 Orlandi PA (1997) Protein-disulfide i...

Ngày tải lên: 16/02/2014, 14:20

... thus their expression in H. perforatum tissues could not be distin- guished from each other, the general name HpPKS2 is used in this study. Phylogenetic analysis The overall similarity of the deduced ... the nodular structures is considered to have evolved as a mechanism for the plant to avoid the potential auto- toxicity of these compounds [19]. The biosynthesis of hypericins is curr...

Ngày tải lên: 18/02/2014, 18:20

... protein function. A particular aspect that is special to the BioMillenium series of conferences (this has been the 10th in this series) is the emphasis on new and emerging technologies; the various ... cell masses. Pericellular proteolysis is hence a prerequisite for expansive tumor growth, collective invasion and large-scale tissue reshaping. In contrast, single-cell dis- semination as...

Ngày tải lên: 19/02/2014, 02:20

... B-cell differentiation [1], visfatin, is nicotinamide phosphori- bosyl transferase (NAMPT) [2,3], a rate-limiting enzyme in the synthesis of NAD + from nicotin- amide. Visfatin ⁄ PBEF ⁄ NAMPT is synthesized ... circulating levels of visfatin have been observed in many inflammatory diseases such as rheumatoid arthritis, obesity, insulin resistance and type 2 diabetes [5–7]. Visfatin is...

Ngày tải lên: 06/03/2014, 22:21

... 4-acetamido-4¢-maleim- idylstilbene-2,2¢-disulfonic acid disodium salt (AMS) were purchased from Invitrogen (Carlsbad, CA, USA). Antise- rum against influenza haemagglutinin (HA) was obtained from Sigma (St Louis, MO). The other antisera ... lipid bilayer independently of the Sec machinery. This is consistent with pub- lished data. Surprisingly, and in conflict with earlier data, YidC is...

Ngày tải lên: 07/03/2014, 02:20