Báo cáo khoa học: "Using Corpus Statistics on Entities to Improve Semi-supervised Relation Extraction from the Web" pot
Báo cáo khoa học: "Using Corpus Statistics on Entities to Improve Semi-supervised Relation Extraction from the Web" pot
... how to integrate the results produced by the validating patterns into the whole relation extraction system. • We show how to use corpus statistics and term extraction methods to correct the ... speci-fied relations from the Web without human super-vision. Accordingly, the supervised input to the system is limited to the specifications of the target relations. A specification for a given relation ... in the corpus with a sufficient frequency. The validation is based on the first observation, while the boundary fixing on the second. Corpus- based entity validation There is a preparation...
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Tài liệu Báo cáo khoa học: "A Novel Feature-based Approach to Chinese Entity Relation Extraction" ppt
... kernel over the original Chinese string representation around particular entities. The only relation they studied is PERSON-AFFLIATION. The insufficient study in Chinese relation extraction drives ... Microsoft Corporation” conveys the ACE-style relation “ORG-AFFILIATION” between the two entities “Bill Gates (PER)” and “Microsoft Corporation (ORG)”. The task of relation extraction has been extensively ... us to investigate how to find an approach that is particularly appropriate for Chinese. 3 A Chinese Relation Extraction Model Due to the aforementioned reasons, entity relation extraction...
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Tài liệu Báo cáo khoa học: "Using Cycles and Quasi-Cycles to Disambiguate Dictionary Glosses" pdf
... ex-tends the sense definition with words from the definitions of related senses (such as hy-pernyms, hyponyms, etc.). We use the sameset of relations available in the authors’ im-plementation of the ... Italian-English section to corsanand garan. To apply the CQC algorithm, a simple adapta-tion is needed, so as to allow (quasi-)cycles to con-nect word senses from the two distinct sections. The algorithm ... section fori ≤ k and from the source section for i > k,for some k such that 0 ≤ k ≤ n − 2. In otherwords, the DFS can jump at any time from the tar-get section to the source section. After...
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Báo cáo khoa học: "Using lexical and relational similarity to classify semantic relations" pptx
... unrelated to) other kinds of relation extraction tasks whereeach data item is tied to a specific sentence con-text (e.g., Girju et al. (2007)).One such relational reasoning task is the prob-lem ... re-lational distributional hypothesis therefore statesthat two word pairs are semantically similar if theirmembers appear together in similar contexts. The distinction between lexical and relationalsimilarity ... better than the best results obtained with either the lexical or the relational model taken alone. The best resultis obtained by the combining the lexical kernelcomputed on BNC conjunction features...
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Tài liệu Báo cáo khoa học: Substrate specificity and inhibition of brassinin hydrolases, detoxifying enzymes from the plant pathogens Leptosphaeria maculans and Alternaria brassicicola ppt
... secondary plotwas constructed using the apparent S0.5valuesobtained in the presence and absence of inhibitor ver-sus inhibitor concentration. The linear regression wasused to determine the ... purification in the absence of TritonX-100 and glycerol. Thus, to prevent enzymatic inacti-vation, Triton X-100 (0.015%) and glycerol (1–3%)were added to all buffers except for the extraction buffer. ... are envi-sioned as nontoxic and environmentally sustainableplant treatments containing a combination of specificsynthetic inhibitors of phytoalexin-detoxifyingenzymes. However, to design paldoxins...
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Tài liệu Báo cáo khoa học: Production and characterization of a secreted, C-terminally processed tyrosinase from the filamentous fungus Trichoderma reesei ppt
... The reaction was initiated by addition of the enzyme to the sub-strate solution, and the oxidation rate (nmolÆL)1Æs)1) wascalculated from the linear part of the oxygen consumptioncurve. The ... wasverified.Overexpression of the tyrosinase genein Trichoderma reesei The genomic tyr2 gene fragment was transferred by an LRrecombination reaction from the pDONR221 vector to the T. reesei expression vector ... was cloned into the pCR2.1TOPOvector with the TOPO-TA Cloning Kit (Invitrogen, Carls-bad, CA, USA) and subsequently transferred into the pDONR221 vector (Invitrogen) with a BP recombinationreaction...
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Tài liệu Báo cáo khoa học: Purification and characterization of a membrane-bound enzyme complex from the sulfate-reducing archaeon Archaeoglobus fulgidus related to heterodisulfide reductase from methanogenic archaea pdf
... fraction. A furtherpurification of the proteins in this heme-containing fractionby gel fi ltration on Superdex 200 resulted again in only oneheme-containing fraction eluted after 120–150 mL. In the final ... module of the enzyme complex mediates the electrontransfer from menaquinol to an unidentified electronacceptor on the cytoplasmic side o f the membrane. This issupported by the findin g that the heme ... pointscorrespondtotheamplitudeofthetroughcenteredatg ¼ 1.951; as in the low po tential range, the radical signal of the dyes overlap in the g ¼ 2.0 region. The maximal spin concentration was 0.4...
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Báo cáo khoa học: Interactions between coenzyme B12 analogs and adenosylcobalamin-dependent glutamate mutase from Clostridium tetanomorphum pot
... beenprovided to support the steric effect to explain the cobalt–carbon cleavage mechanism. The binding energy for AdoCbl comes from inter-actions between proteins and the cofactor. From the viewpoint ... weakened within the enzyme active site [18,19]. The correlationbetween the distortion of the adenosyl group andcleavage of the cobalt–carbon bond is still not clear.Although the precise mechanism ... 2100 spectropho-tometer; a sample of the corresponding dialysis buffer wasused to subtract the contribution of unbound coenzymeanalogs from the absorbance of the enzyme. The kaleidagraph...
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Báo cáo khoa học: Global shape and pH stability of ovorubin, an oligomeric protein from the eggs of Pomacea canaliculata pot
... giving the best fit to the scattering intensity. The resulting dummy atom model represents the shape of the scattering particle. To increase the reliability of the results, the final model for the ... mgÆmL)1wereperformed to rule out a concentration effect in the data. The final experiments were performed at 0.24 mgÆmL)1. The distance distribution function P(r) was calculated by the Fourier inversion of the ... low-dose conditions in aJEM-1200 EX transmission electron microscope (Tokyo,Japan). Statistical analysis of the particle size distributionwas carried out using the tools built into the programimagej...
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Báo cáo khóa học: A new UV-B absorbing mycosporine with photo protective activity from the lichenized ascomycete Collema cristatum docx
... able to increase their MAA content inresponse to UV-B radiation and thus may be able to adapt to daily fluctuations in solar radiation impinging on theirnatural environment. Action spectra for the ... Evolution.Isolation and cultivation of mycobiontsMycobionts from Collema cristatum were obtained from the spores discharged from the apothecia of a thallus, and wereCorrespondence to M. Srebnik, Department ... exposure and are considered central events in the initiation and promotion of skin cancer [18]. The biologicalsignificance of such DNA lesions depends on the capacity of the cell to repair the damage...
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