Báo cáo khoa học: "Representing Constraints with Automata" doc

... some of the problems of the naive approach, concluding with a discussion of its strengths and weaknesses. 2 Defining Automata with Constraints Tree automata. For completeness, we sketch ... Representing Constraints with Automata Frank Morawietz and Tom Cornell Seminar fiir Sprachwissenschaft Universit£t ... the denotation of Xi, we indicate this by labeling n with a bit string in which the ith bit is on. (In effect, we are labelling every node with a list of the sets to which it belongs.) Now every...

Báo cáo khoa học: "Content Models with Attitude" docx

... ofproduct properties with associated sentiment fromreview text (Hu and Liu, 2004; Liu et al., 2005a;Popescu et al., 2005). These methods identify rele-vant information in a document using a wide ... which werenot addressed in prior research that focused on per-document analysis.A second related line of research is multi-document review summarization. Some ofthese methods directly apply ... improve sentiment prediction by exploit-ing correlations within a single property cluster. Forexample, if there are already many snippets with theattribute representing positive sentiment in a...

Báo cáo khoa học: "FEATURE LOGIC WITH WEAK CONSTRAINTS SUBSUMPTION" pdf

... and z and ~/are variables. A feature clause is a finite set of constraints of the above forms. As usual we interpret constraints with respect to a variable assignment, in order to make sure ... not contain a string zpa together with zpb (where a ~ b) or together with zpf. It is clear that the property of a reg- ular language L of being dash-free with respect to L and A can be read ... formalisms, but also for extensions of the basic logic with a precisely defined meaning. The extension we present here, weak subsumption constraints, is a mechanism of one-way information flow,...

Báo cáo khoa học: "HPSG Parsing with Shallow Dependency Constraints" docx

... parsing with a POS tagger or with gold standardPOS tags. Figure 4 shows the accuracy of HPSGpredicate-argument relations obtained with depen-dency constraints determined by dependency pars-ing with ... sentences were automatically tagged with parts-of-speech with about 97% accuracy, using a max-imum entropy POS tagger. We also report resultson parsing text with gold standard POS tags, whereexplicitly ... Ninomiya et al. (87.1% LP and85.9% LR).4.2 Dependency constraints and the penaltyparameterParsing the development data with hard dependency constraints conﬁrmed the intuition that these con-straints...

Báo cáo khoa học: "Eliminative Parsing with Graded Constraints" doc

... pressed with graded constraints: • Hard constraints with a score of zero (e. g. con- straint SubjUnique) exclude totally unaccept- able structures from consideration. This kind of constraints ... word order are specified by means of weaker constraints with score larger than, but near to zero, e. g. constraint SubjNumber. • Weak constraints with score near to one can be used for conditions ... annotated with a score. The solution of such a partial constraint satisfac- tion problem with scores is the dependency struc- ture of the utterance that violates the fewest and the weakest constraints. ...

Báo cáo khoa học: "Sentence Compression with Semantic Role Constraints" doc

... global constraints and can generate syntactically correct sentences.Our concern is how a model with SR constraints is superior to a model without them. MLN with SRL outperforms MLN without SRL with ... re-implemented McDonald’smodel with an ILP solver and experimented it on theWNC Corpus.9MLN with SRL and MLN w/oSRL are our Markov Logic models with and with- out SR Constraints, respectively.Note ... are not suﬃcient to compress some complexsentences with coordination, with passive voice, and with an auxiliary verb. Figure 1 shows an example with a coordination structure.11This example is...

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

... PR with the V32I mutation; PRI50V, PR with the I50V mutation; PRI54M, PR with the I54M mutation; PRI54V, PR with the I54V mutation; PRI84V, PR with the I84V mutation; PRL90M, PR with ... compared with PRWT–SQV. (B) PRI50V–APV compared with PRI50V–SQV. (C)PRI54M–APV compared with PRI54M–SQV. (D) PRI54V–APV compared with PRI54V–SQV. (E) PRI84V–APV compared with PRI84V–SQV. ... the complexes with both inhibitors.DiscussionWe have described an atomic resolution crystal struc-ture of PRWT with APV, and analyzed structuralchanges in the APV complexes with mutants PRV32I,PRI50V,PRI54M,PR154V,PRI84Vand...

Tài liệu Báo cáo khoa học: A tyrosinase with an abnormally high tyrosine hydroxylase/dopa oxidase ratio Role of the seventh histidine and accessibility to the active site docx

... R3. The PCR product with a size of  1.6 kbwas digested with BamHI to obtain a fragment betweenthe two copper-binding site coding regions and ligatedto pBlueScript pKSII(+) with T4 DNA ligase ... R3-1501–than R3-0337–. This pattern agrees with the presence of twodifferent enzymes with overlapping activities.Puriﬁcation of two enzymes with differentafﬁnities for monophenols and o-diphenolsSupernatants ... differentforms during the cycles: met, resting tyrosinase with Cu(II); oxy,oxygenated form with peroxide bound to Cu(II); deoxy, reducedCu(I) transient form with high afﬁnity for oxygen. The efﬁciency forboth...

Tài liệu Báo cáo khoa học: "Semantic Parsing with Bayesian Tree Transducers" doc

... a pattern with which to expandit and then ﬁlling out that pattern with words drawnfrom a unigram distribution.This kind of coupled generative process canbe naturally formalized with tree ... gen-erate MR and NL associated with MR rules m -v (top).Transducer rule 2 selects MR rule r from the MR gram-mar. Rule 3 simultaneously writes the MR associated with rule m and chooses an NL ... Ψ(r:s(r)=tˆα(r)).493The parameters of q(θt) are deﬁned with respectto q(xi) and the parameters of q(xi) with respectto the parameters of q(θt). q(xi) can be computedefﬁciently...

Tài liệu Báo cáo khoa học: "Word Alignment with Synonym Regularization" doc

... the SRH.We show the performance of GIZA++ and HM-BiTAM with the SRH in the lines entitled with SRH” in Table 1. The GIZA++ and HM-BiTAM with the SRH slightly outperformed the standardGIZA++ ... alignment model. We formulate a syn-onym pair generative model with a topic variableand use this model as a regularization term with abilingual word alignment model. The topic vari-able in ... meanings of synonyms. We extendHM-BiTAM, which is a HMM-based word align-ment model with a latent topic, with a novel syn-onym pair generative model. We applied the pro-posed method to an...

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