Báo cáo khoa học: "Semi-supervised Relation Extraction with Large-scale Word Clustering" pptx

Tài liệu Báo cáo khoa học: "Resume Information Extraction with Cascaded Hybrid Model" pdf

... units with predefined class labels. Given an input resume T which is a sequence of words w1,w2,…,wk, the result of general information extraction is a sequence of blocks in which some words ... problems may occur when estimating either P(T|L) with unknown word wi or P(L) with unknown events. Bikel et al. (1999) mapped all unknown words to one token _UNK_ and then used a held-out ... probability calculated with Formula 9 and x=Ei/Si (Ei is the number of words appearing only once in state i and Si is the total number of words occurring in state i). For unknown word wr, the...

Báo cáo khoa học: "Unsupervised Relation Discovery with Sense Disambiguation" docx

... tokens with preﬁx “r:”. We use tokens to encourage overlapbetween different entities.For the word features, we extract all the words be-tween the two arguments, removing stopwords andthe words with ... letters. Words with capitalletters are usually named entities, and they do nottend to indicate relations. We also extract neigh-boring words of source and destination arguments.The two words ... crucial.1 Introduction Relation extraction (RE) is the task of determin-ing semantic relations between entities mentioned intext. RE is an essential part of information extraction and is useful...

Báo cáo khoa học: "Unsupervised Relation Extraction by Mining Wikipedia Texts Using Information from the Web" pdf

... extract relational infor-mation of two kinds: ranked relational terms askeywords and surface patterns. Here surface pat-terns are generated with support of ranked rela-tional terms.4.3.1 Relational ... classiﬁed words into Content Words(CWs) and Functional Words (FWs). From eachsnippet sentence, the entitled concept, related con-cept, or the keyword kcpis considered to be a Con-tent Word (CW). ... Currently, lin-guistic approaches for semantic relation extraction are mostly supervised, relying on pre-speciﬁcationof the desired relation or initial seed words or pat-terns from hand-coding. The...

Báo cáo khoa học: "Automatic Event Extraction with Structured Preference Modeling" ppt

... feature templates as above, with the followingadditional ones to capture contextual information:CWORDS: Indicator function for the previous andnext k (= 1, 2, 3) words.CPOS: Indicator function ... local struc-ture prototypes (e.g., in citation extraction, the word pp. always corresponds to the PAGES ﬁeld, whileproceedings is always associated with BOOKTITLEor JOURNAL), or as certain global ... minimalassumptions, our primary event extraction results3http://www.itl.nist.gov/iad/mig/tests/ace/2005/doc/840EventWithout Annotated Training Data With Annotated Training DataRandom Unsup...

Báo cáo khoa học: "Native Language Detection with Tree Substitution Grammars" pptx

... detection hasbeen mainly associated with the ICLE, published in2002. Koppel et al (2005) ﬁrst constructed sucha system with a feature set consisting of functionwords, POS bi-grams, and character ... dis-tributions of unbounded size with a dynamic param-eter set that grows with the size of the training data.One method of TSG induction is to represent a prob-abilistic TSG with Dirichlet Process priors ... baseline systems with this approach.1932.2 TSG inductionOne inherent difﬁculty in the use of TSGs is con-trolling the size of grammars automatically in-duced from data, which with any reasonable...

Báo cáo khoa học: "Extractive Summarization Based on Event Term Clustering" pptx

... verb relations, into event-based summarization. Different from other thesaurus like WordNet, VerbOcean provides five types of semantic verb relations at finer level. This just fits in with ... derived from documents and generally associated with single events, but they neglect the relations among events. However, events are commonly related with one another especially when the documents ... take advantage of the semantic relations of event terms, and most importantly, how to make use of those relations. Our idea is grouping the terms connected by the relations into the clusters,...

Tài liệu Báo cáo khoa học: An allosteric DNAzyme with dual RNA-cleaving and DNA-cleaving activities doc

... allostericDNAzyme with dual RNA-cleaving and DNA-cleaving activities is verychallenging. We used an in vitro-selected pistol-like (PL) DNAzyme as aDNA scaffold for designing a DNAzyme with dual catalytic ... As compared with PL DNAzyme, DRc DNA-zyme function seemed to have decreased sensitivity tothe reaction temperature. DRc DNAzyme exhibited abroad functional range for temperature, with optimumactivity ... L-ascorbate inthe reaction. Lanes M I and M II were loaded with 5¢-32P-labeled synthetic DNAs of different lengths as indicated, each with a sequence thatcorresponded to the respective 5¢-terminus...

Tài liệu Báo cáo khoa học: DNA modiﬁcation with cisplatin affects sequence-speciﬁc DNA binding of p53 and p73 proteins in a target site-dependent manner pptx

... cisplatin DNA treatmentcorrelated with the occurrence of sequence motifs forming stable bifunc-tional adducts with the drug (namely, GG and AG doublets) within thetarget sites. Binding of ... protein with cer-tain response elements can be controlled by changes inDNA topology inducing formation of non-B DNAstructures within the binding sites [11,12]. Interactionsof p53 with DNA ... was observed with the anticancer tri-nuclear platinum complex BBR3464 but not with theclinically ineffective transplatin. Quite recently, it hasbeen shown that DNA modiﬁcation with a transplatinanalog,...

Tài liệu Báo cáo khóa học: Point mutations associated with insecticide resistance in the Drosophila cytochrome P450 Cyp6a2 enable DDT metabolism doc

... Biochem. 271, 1250–1257 (2004) Ó FEBS 2004 doi:10.1111/j.1432-1033.2004.04025.x relation with xenobiotic metabolism or with metabolism ofendogenous compounds [24,25]. Models for CYP51 werealso ... theRDDTRstrain were measured with all recombinant pro-teins, namely testosterone hydroxylation and DDT meta-bolism. Testosterone was hydroxylated at the 2b position with little quantitative variation ... radioactiveareas and counting with a Wallac 1410 counter.Substrate-induced binding spectraSpectral titrations were conducted using a double-beamspectrophotometer (Kontron Uvikon 860) with twoCYP6A2 enzymes:...

Tài liệu Báo cáo khoa học: "Learning to Translate with Multiple Objectives" doc

... of translation edit rate with targeted human annotation. In AMTA.Valentin I. Spitkovsky, Hiyan Alshawi, and Daniel Juraf-sky. 2011. Lateen em: Unsupervised training with multiple objectives, ... different metrics Mk(h) forevaluating the quality of h. Without loss of gen-erality, we assume metric scores are bounded be-tween 0 and 1, with 1 being perfect. Each hypoth-esis h can be mapped ... circle(o) are pareto-optimal, while those with plus (+) arenot. To visualize this, take for instance the pareto-optimal point (0.4,0.7). There is no other point with either (metric1 > 0.4 and metric2...

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