Tài liệu Báo cáo khoa học: "Finding Synonyms Using Automatic Word Alignment and Measures of Distributional Similarity" pdf

... semantically related words using measures of distributional similarity, butthese typically are not able to distin-guish between synonyms and other types of semantically related words such asantonyms, ... similarity: one using syntactic context and one using translational context based on word alignment and the combination of both. For bothapproaches, we used a cutoff n for each row in our word- by-context ... word P(W) is the probability of seeing the word P(f) is the probability of seeing the featureP(W,f) is the probability of seeing the word and the featuretogether.3.3 Word Alignment The multilingual...

Tài liệu Báo cáo khoa học: "Keyword Extraction using Term-Domain Interdependence for Dictation of Radio News" ppt

... np(wordk) x Xk,15) all paths In formula (5), wordk is a word in the word lattice, and each selected word does not share any frames with any other selected words. np(wordk) is the number of ... best when the number of words in keyword dictionary was about 800. In his method, duration of discourses of switch board corpora is rather long and there are many keywords in the discourse. ... manually and calculated 5 feature vectors for classifying domains of each unit of radio news and for extracting keywords. Our previous system could not extract some keywords because of many...

Tài liệu Báo cáo khoa học: Cell surface heparan sulfate proteoglycans Target and partners of the basic ®broblast growth factor in rat Sertoli cells pptx

... egulation of their expression speci®cally dependson the nature of HSPG and of the Sertoli cell developmentalstage.In conclusion, HSPG are partners and the target of bFGFin rat Sertoli cells.Keywords: ... using Polaroid ®lm under UV light and ana-lysed using a AGFA SnapScan 1200PScannerÒ, AdobeÓ FEBS 2002 HSPG, target and partners of bFGF (Eur. J. Biochem. 269) 503PHOTOSHOPÒsoftware and ... cholera toxin and bFGF.Extraction of total RNATotal RNA was extracted from rat Sertoli cells by singlestep method of Chomczynski & Sacchi [29] using T rizolreagent. T he integrity and quality...

Tài liệu Báo cáo khoa học: "Finding Hedges by Chasing Weasels: Hedge Detection Using Wikipedia Tags and Shallow Linguistic Features" doc

... most ﬁve words and weasel tags are mostlyinserted behind weasel words or phrases.Each word within these 5-grams receives an in-dividual score, based a) on the relative frequency of this word in ... number of times word w oc-curred in the context of a weasel tag, whereasC(w) denotes the total number of times w oc-curred in the corpus. The basic idea of the RelFscore is to give those words ... denotes the distance of word w to the weasel tag in j. A word that always ap-pears directly before the weasel tag will receivean AvgDist value of 1, a word that always ap-pears ﬁve words before the...

Tài liệu Báo cáo khoa học: "Finding Predominant Word Senses in Untagged Text" pptx

... domainat hand.SemCor comprises a relatively small sample of 250,000 words. There are words where the ﬁrstsense in WordNet is counter-intuitive, because of the size of the corpus, and because ... Package 0.05 and WordNet version 1.6.2The WordNet Similaritypackage supports a range of WordNet similarityscores. We experimented using six of these to pro-vide thein equation 1 above and obtained ... jcn and lesk WordNet similarity measures. The random baseline for choosing the predominantsense over all these words ( )is 32%. Both WordNet similarity measures beatthis baseline. The random...

Tài liệu Báo cáo khoa học: "Finding Parts in Very Large Corpora" pdf

... those of Word- Net. Table 5 shows the parts of "car" in WordNet that are not in our top 20 (+) and the words in our top 20 that are not in WordNet (-). There are defi- nite tradeoffs, ... number of correct part words in the top 10, 20, 30, 40, and 50 parts for each seed (e.g., for "book", 8 of the top 10 are parts, and 14 of the top 20). Over- all, about 55% of the ... Scores of subjects who marked the wordas a part of the seed concept. The score of individual words vary greatly but there was relative consensus on most words. We put an asterisk next to words...

Tài liệu Báo cáo khoa học: An alternative isomerohydrolase in the retinal Muller cells of a cone-dominant species doc

... cycle.Materials and methodsCloning and construction of zebraﬁsh RPE65cexpression vectorsThe cornea and lens were removed from enucleated zebraﬁsheyes, and total RNA was extracted from the eyecups using Trizol ... the absorption spectrum of each retinoid standard.Isomerohydrolase activity was calculated from the area of the 11cROL and 13cROL peaks and expressed as themean ± SD of three independent measurements.Retinal ... evolutionaryanalysis of DNA and protein sequences. Brief Bioinform9, 299–306.53 Bradford MM (1976) A rapid and sensitive method forthe quantitation of microgram quantities of proteinutilizing the principle of...

Tài liệu Báo cáo khoa học: Secondary substrate binding strongly affects activity and binding afﬁnity of Bacillus subtilis and Aspergillus niger GH11 xylanases docx

... of CBMs.Results and DiscussionGenetic engineering of the SBSResidues of the SBS of both XBS and XAN involvedin substrate interaction were selected based on thecrystal structures of XBS and ... NMR-monitored titrations of Bacillus circulans xylanase [13] and X-ray analysis of crystals of catalytically incompetent mutants of thexylanases of Bacillus subtilis (XBS) and Aspergillusniger ... secondary binding sites of the A. niger xylanase (A) and the B. subtilis xylanase (B). The diagrams of protein–ligand inter-actions were generated using LIGPLOT [37] based on Vandermarliere et al....

Tài liệu Báo cáo khoa học: The ubiquitin ligase Itch mediates the antiapoptotic activity of epidermal growth factor by promoting the ubiquitylation and degradation of the truncated C-terminal portion of Bid ppt

... anti-FLAG and blotted with anti-GFPto reveal Bid and tBid coimmunoprecipitation. (B) 293T cells were cotransfected with constant amounts of rLuc–Itch and various amounts of either Bid–GFP of tBid–GFP. ... through downregulation of tBid, providing furtherdetails on how EGF receptor and proteasome inhibitors can contribute to theinduction of apoptosis and the treatment of cancer.Structural digital ... activation of afamily of cytosolic cysteine proteases, caspases, whichare required for many of the morphological changesthat occur during apoptosis. The mitochondrial release of cytochrome c and...

Tài liệu Báo cáo khoa học: Amprenavir complexes with HIV-1 protease and its drug-resistant mutants altering hydrophobic clusters docx

... size of the P1¢ groupin APV relative to that of SQV. Also, the ﬂexible sidechains of Asp30 and Asp30¢ accommodate diversefunctional groups at P2 and P2¢ of SQV and APV atthe surface of the ... intothe mechanisms of resistance and help in the design of new inhibitors.ResultsAPV inhibition of PR and mutantsThe kinetic parameters and inhibition constants of APVfor PRWT and the drug-resistant ... substrates and inhibitors.In PRWT, van der Waals contacts were found betweenCd1 of Ile84 and the benzyl and aniline moieties of APV and from Cd1 of Ile84¢ to the isopropyl group of APV. These...

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