Báo cáo khoa học: "A Study on Convolution Kernels for Shallow Semantic Parsing" pdf

... Fz) = (c+x·z)d,where c is a constant and d is the degree of thepolynom.3 Convolution Kernels for Semantic ParsingWe propose two different convolution kernels associated with two different ... common characteris-tic is the adoption of feature spaces that modelpredicate-argument structures in a flat repre-sentation. On the contrary, convolution kernels aim to capture structural information ... A Study on Convolution Kernels for Shallow Semantic ParsingAlessandro MoschittiUniversity of Texas at DallasHuman Language Technology Research InstituteRichardson, TX 75083-0688,...

Báo cáo khoa học: A study on genomic distribution and sequence features of human long inverted repeats reveals species-speciﬁc intronic inverted repeats pptx

... distribution of LIRs in both intronic andintergenic regions (see Fig. S1). We also considered theeffect of the length of these regions on the distribution.The intronic and intergenic regions were ... results conﬁrmed that LIRs tend to residein large intronic and intergenic regions. Only ﬁve LIRswere found in introns < 1 kb (the smallest intron was757 bp), and none in intergenic regions < ... them were located in long introns (largely> 10 kb) of genes. Their distribution appears to be random in introns andis not restrictive, even for regions near intron–exon boundaries. Almosthalf...

Báo cáo khoa học: "A Study on Automatically Extracted Keywords in Text Categorization" doc

... International Conference on Computational Linguistics and 44th Annual Meeting of the ACL, pages 537–544,Sydney, July 2006.c2006 Association for Computational LinguisticsA Study on Automatically ... representation by selectingone or the other for each category. They showthat concept-based representations can outperformtraditional word-based representations, and that acombination of the ... furtherreduce the space, for example chi-square, or infor-mation gain (see for example Forman (2003) for asurvey).Once that the features have been set, the ﬁnaldecision to make is what feature...

Báo cáo khoa học: "A Study on Richer Syntactic Dependencies for Structured Language Modeling" ppt

... annotate parent informa-tion onto the constituents, as Johnson did in (John-son, 1998), this richer predictive annotation can ex-tend information slightly beyond the left context.Under the ... (Charniak,2001). For these reasons, we prefer enriching the syntacticdependencies by information from the left context.However, as mentioned in (Roark, 2001), oneway of conditioning the probabilities ... labelpassing control to the WORD-PREDICTOR (the-th operation at position k is the null transi-tion); is a function ofdenotes the -th CONSTRUCTOR operationcarried out at position k in the word...

Báo cáo khoa học: "A STRUCTURED REPRESENTATION OF WORD-SENSESIR OR SEMANTIC ANALYSIS" pdf

... characteristic relation. 2. Canonical graphs. Canonical graphs express the semantic constraints (or semantic expectations ruling the use of a concept. For example, the canonical graph for GO is: ... sections discuss the above listed items. Concepts, relations and words. The pr()htem analyzed in this section concerns the translation of a words dictionary into a concept-relation dictionary. ... satisfied for both W1 and W2. In conclusion, it is possible to write general conditions on word uses wiHmut get worried about exceptions. The following section gives an example of concept definition....

Báo cáo khoa học: "A Discriminative Latent Variable Model for Statistical Machine Translation" pdf

... Results show thataccounting for multiple derivations does in-deed improve performance. Additionally, weshow that regularisation is essential for max-imum conditional likelihood models in orderto ... derivations. As the training data onlyprovides source and target sentences, the derivationsare modelled as a latent variable.The conditional probability of a derivation, d, for a target translation, ... a3http://www.statmt.org/europarl/4http://www.statmt.org/wmt0{6,7}204DecodingTraining derivation translationAll Derivations 28.71 31.23Single Derivation 26.70 27.32ML (σ2= ∞) 25.57 25.97Table 1. A comparison on the impact of accounting for allderivations in training...

Báo cáo khoa học: "A Morphological Analyzer and Generator for the Arabic Dialects" pdf

... (TyR for type recall, ToR for token re-call): what proportion of the analyses in the goldstandard does MAGEAD get?Precision (TyP for type precision, ToP for to-ken precision): what proportion ... rules rewrite only the ortho-graphic representation. These include, for exam-ples, rules for using the shadda (consonant dou-bling diacritic). For MSA, we have 53 such rules. For our example, ... MSA corresponds to the concrete root mor-pheme 1V2V3. We deﬁne MBCs using a hierar-chical representation with non-monotonic inher-itance. The hierarchy allows us to specify onlyonce those...

Báo cáo khoa học: "THE REPRESENTATION OF CONSTITUENT STRUCTURES FOR FINITE-STATE PARSING" pdf

... Gl*c-e, on the other hand, is unmotivated if the only criteria for choosing an affix type have to do with direction of recursion. For affix grammars of natural languages, however, one can ... descriptions of those expressions. This paper considers some initial steps in the construction of such a model. The first step is to determine a method of represen- ting the class of constituent ... notation for representations of the constituent structures of the expressions of natural languages is proposed, which are of limited degree of center embedding if the original expressions...

Báo cáo khoa học: "State-of-the-Art Kernels for Natural Language Processing" pdf

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Tài liệu Báo cáo khoa học: "A study of Information Retrieval weighting schemes for sentiment analysis" doc

... normalization.Notation Normalizationn (none) 1c (cosine)1√w21+w22+ +w2nSigniﬁcant research has been done in IR on di-verse weighting functions and not all versions ofSMART notations are consistent ... a∆(p)c vs. a∆ (p′)n.6 ConclusionsIn this paper, we presented a study of documentrepresentations for sentiment analysis using termweighting functions adopted from information re-trieval and adapted ... Association for Computational LinguisticsA study of Information Retrieval weighting schemes for sentiment analysisGeorgios PaltoglouUniversity of WolverhamptonWolverhampton, United Kingdomg.paltoglou@wlv.ac.ukMike...

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