Tài liệu Báo cáo khoa học: "Extracting Semantic Orientations of Words using Spin Model" pdf

... :¯xnewi=xixiexpβxijwij¯xoldjxiexpβxijwij¯xoldj. (7)4 Extraction of Semantic Orientation of Words with Spin ModelWe use the spin model to extract semantic orienta-tions of words. Each spin has a direction taking one of two values:up or ... iteratively determinesthe semantic orientations of the words neighboringany of the seed words and enlarges the seed wordset in a bootstrapping manner.Subjective words are often semantically oriented.Wiebe ... proposed a method for ex-tracting semantic orientations of words with boot-strapping. The semantic orientation of a word isdetermined on the basis of its gloss, if any of their52 hand-crafted rules...

Tài liệu Báo cáo khoa học: "Is the End of Supervised Parsing in Sight?" pdf

... Proceedings of the 45th Annual Meeting of the Association of Computational Linguistics, pages 400–407,Prague, Czech Republic, June 2007.c2007 Association for Computational LinguisticsIs the End of ... of size, to form a stochastic tree-substitution grammar (STSG). Since a parse tree of a sentence may be generated by several (leftmost) derivations, the probability of a tree is the sum of ... U-DOP*’s training phase merely consists of the computation of the shortest derivations and the extraction of subtrees, UML-DOP involves iterative training of the parameters. Once we have extracted...

Tài liệu Báo cáo khoa học: "An Evaluation Method of Words Tendency using Decision " docx

... classes of the input analysis data (test data). 2. POPULARITY OF WORDS CONSIDERING TIME-SERIES VARIATION 2.1 Stability Classes of the Words: To judge the index of popularity of words with ... Number of correct words extracted by (DT) Precision = Total number of words extracted by (DT) Number of correct words extracted by DT) Recall = ❈❈❈❈❈❈ Total number of correct words ... change of words frequency with time- series variation included in both periods. The data of extracted words is shown in Table 2. In order to get the accuracy of the correct words that are words...

Tài liệu Báo cáo khoa học: "Detecting Semantic Equivalence and Information Disparity in Cross-lingual Documents" doc

... extension of textual entailment which consists of deciding, given a text T and an hypothesis H in dif-ferent languages, if the meaning of H can be inferredfrom the meaning of T. The adoption of entailment-based ... relaxedmatches through semantic tags in place of “out of vocabulary” terms (e.g. unseen person names) is aneffective way to improve CLTE performance, evenat the cost of some loss in precision.Like ... con-straints to the matching process, DR features aim toreduce the amount of wrong matches often occur-ring with bag -of- words methods (both at the lexi-cal level and with recall-oriented SPTs)....

Tài liệu Báo cáo khoa học: "Unsupervised Semantic Role Induction with Global Role Ordering" doc

... the notion of primaryroles, and each interval generates a sequence of secondary roles and syntactic constituents using local features. The global role orderingconsists of the sequence of primary ... relation of an argument to its head in the dependency parsetree, (ii) head: head word of the argument, and (iii)pos-head: Part -of- Speech tag of head.Algorithm 1 describes the generative story of ... most of the in-tervals tend to have only a few types of SRs and agiven SR tends to occur only in a few types of in-tervals. The concept of intervals is also related tothe linguistic theory of...

Tài liệu Báo cáo khoa học: "Extracting Comparative Entities and Predicates from Texts Using Comparative Type Classification" pptx

... baseline performance. Next, we did experiments using all of the continuous lexical sequences and using all of the POS tags sequences within a radius of n words from each CK as features (n=1,2,3,4,5). ... word. By using long-distance- words sequences instead of single keywords, we can keep the precision value from dropping seriously low. The comparison lexicon finally has a total of 177 elements. ... preceding word of k is tagged z. 2. the following word of k is tagged z. 3. the second preceding word of k is tagged z. 4. the second following word of k is tagged z. 5. the preceding word of k is...

Tài liệu Báo cáo khoa học: "Extracting Comparative Sentences from Korean Text Documents Using Comparative Lexical Patterns and Machine Learning Techniques" doc

... candidate, we use continuous words sequence within the radius of 3 (the window size of 7) of each keyword in the sentence; we expe-rimented with radius options of 2, 3, and 4 and we achieved ... tagger of Korean does not pro-vide any comparative and superlative tags be-cause the analysis of Korean comparative is much more difficult than that of English. The major challenge of our ... precision of 88.68% and the overall recall of 88.40%. The remainder of the paper is organized as fol-lows. Section 2 describes the related work. In section 3, we explain comparative keywords...

Tài liệu Báo cáo khoa học: "Ontologizing Semantic Relations" pdf

... PART -OF, book#1] 1.14 10 (hints, PART -OF, booklet) (soup recipes, PART -OF, book) (information, PART -OF, instruction manual) (extensive expert analysis, PART -OF, book) [compound#2, PART -OF, ... corpus. The semantic classes of x and y are then inferred using concep-tual density (Agirre and Rigau 1996), a Word-Net-based measure applied to all instantiation of x and y in the corpus. Semantic ... length of the shortest path connecting the two synsets in the hypernymy hierarchy of WordNet, and f(sx') is the number of times sense sx' occurs in any of the instances of X'....

Tài liệu Báo cáo khoa học: "N Semantic Classes are Harder than Two" doc

... perform supervised classification of pairs of phrases into semantic classes. To do this,we will assign features to each pair of phrases,which may be predictive of their semantic rela-tionship, then ... LabelingWordNet is a large lexical database of English words. In addition to defining several hun-dred thousand words, it defines synonym sets, orsynsets, of words that represent some underly-ing ... generalization.We describe a set of features used to train n-way supervised machine-learned classification of semantic classes for arbitrary pairs of phrases. Re-dundancy in the sources of our feature informa-tion...

Tài liệu Báo cáo khoa học: Multi-targeted activity of maslinic acid as an antimalarial natural compound pdf

... theprocessing of apicoplast protein leader sequence.Inhibition of any of these activities could contribute toMA interference in the maturation of the parasite.Polypharmacology of MAThe observed ... on the structure of the available inhibitors of cathepsin D [19], a lysosomal protease of mamma-lian cells, and chalcones and phenothiazines have beenassayed as inhibitors of falcipain-2 [20,21]. ... analysis of poten-tial inhibitory activities of MA on P. falciparum hasbeen carried out, focusing ﬁrst on the putative proteaseinhibition. Furthermore a chemogenomic-based screen-ing using MA...

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