Báo cáo khoa học: "A Transition-Based Parser for 2-Planar Dependency Structures" pot
Tài liệu Báo cáo khoa học: "A CONNECTIONIST PARSER FOR STRUCTURE UNIFICATION GRAMMAR" docx
... competence and performance phenomena. The remaining constraints imposed at the level of the parser are traditionally treated as performance constraints. For example, the parser& apos;s bounded ... also a simple abstraction operation for SUG descriptions which allows unneeded informa- tion to be forgotten, as will be discussed in the section on the parser design. In an SUG deriva- tion, ... grouping of information, thus expressing the information in- terdependencies. The language which SUG pro- vides for specifying these descriptions allows par- tiality both in the information about...
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Báo cáo khoa học: "A Statistical Parser for Czech*" ppt
... matter only for unknown words, as the parser is designed to do its own tag- ging, for words that it has seen in training at least 5 times, ignoring any tag supplied with the input. For "unknown" ... allowing all dictionary tags for un- known test words somewhat outperformed the alter- native of using the POS tagger's predictions both for training and for unknown test words. When ... words). Search for the highest probabil- ity tree for a sentence is achieved using a CKY-style parsing algorithm. 4 Parsing the Czech PDT Many statistical parsing methods developed for En- glish...
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Tài liệu Báo cáo khoa học: "A rich environment for experimentation unification grammars" potx
... into discussion of the under- lying complexity, for which we unfortunately do not have space here, we give an exter- nal form of a lexical entry for some of the senses of the German verb traeumen. ... PATR-style languages is their lack of facilities for defining new abstractions and expressing linguistic generalisations not foreseen (or even foreseeable) by the language designer. This becomes ... subscripts. Three other special symbols are used: + stands for the unifica- tion operator * stands for top, the underdefined element. # stands for bottom, the overdefined element that corresponds...
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Tài liệu Báo cáo khoa học: "A COMMON FRAMEWORK FOR ANALYSIS AND GENERATION" potx
... compo- nent describing their functional structure. For the rule for S, for instance, we add an ele- ment describing what the SUBJECT and PRED are for. We could say that the SUBJECT is the theme ... complete formal paraphrase of (1) must include at least as much information as we have given above. In particular, the logical structure of our para- phrases contains essential information ... consid- erable debate about the best way of representing this information. 2 GENERATION Suppose we have the formula given above as a for- mal paraphrase of (1), and we want to generate an English...
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Báo cáo khoa học: "A STOCHASTIC PROCESS FOR WORD FREQUENCY DISTRIBUTIONS" pot
... (1975), have been put forward, all of which have Zipf's law as some special or limiting form. Unrelated to Zipf's law is the lognormal hypothesis, advanced for word fre- quency ... matrix 7 ) defines a uniform distribu- tion (all pi# equal), we immediately have that the expected neighborhood density for length rnl is identical for all targets Yt, while for length m~ > ... probabilities py. Consequently, by (5), for fixed length m, higher frequency words will have more neighbors than lower frequency words for non-uniformly dis- tributed transition probabilities....
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Báo cáo khoa học: "A Connectionist Architecture for Learning to Parse" potx
... computed. However the link weights that perform this computation are the same for all the positions in the sequence. Therefore the infor- mation that was learned for an input and context in one sequence ... pattern for the gestalt inputs is straightforward, since these inputs per- tain to information about the sentence as a whole. Whenever a tag is input to the network, the activa- tion pattern for ... still doesn't make SRNs adequate for syntactic parsing. Because SRNs have a bounded number of output units, and therefore an effectively bounded output for each in- put, the space of possible...
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Báo cáo khoa học: "A Comparative Study of Target Dependency Structures for Statistical Machine Translation" ppt
... and target dependency language model (LM) training.2.2 Dependency parsingGraph-based and transition-based are two predom-inant paradigms for data-driven dependency pars-ing. The MST parser (McDonald ... constructed a string-to -dependency trans-lation platform for comparing non-isomorphic tar-get dependency structures. Specially, we proposedan algorithm for generating word-based dependency trees ... dependency structures to be used for string-to -dependency translation. Besidesusing traditional dependency parsers, we alsouse the dependency structures transformedfrom PCFG trees and predicate-argumentstructures...
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Báo cáo khoa học: "A Unification Method for Disjunctive Feature Descriptions" pot
... structure for any nondisjunctive FDL formula, we can represent the parts of a formula which do not contain any disjunction by DGs. DGs are a more compact way of representing the same information ... of the formula is formed by using the commutative law to bring all unconditional conjuncts of the formula together at the front. Of course, there may be no unconditional conjuncts in a formula, ... would be the formula NIL. Each disjunct may be any type of formula, so disjuncts can also be put into a similar form, with aLl unconditional con- juncts grouped together before all disjunctive...
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Báo cáo khoa học: "Generalizing Tree Transformations for Inductive Dependency Parsing" potx
... Dutch results for MaltParser, since MaltParser’sfeature model has access to all the information in the CoNLLdata format, whereas MSTParser in this experiment only couldhandle word forms and part-of-speech ... transforma-tion of Nilsson et al. (2006) is not applicable.4 ParsersThe parsers used in the experiments are Malt- Parser (Nivre et al., 2004) and MSTParser (Mc-Donald et al., 2005). These parsers ... different tree transformationsis dependent on parsing strategy, since all previ-ous experiments have been performed with a single parser (MaltParser). For comparison we have per-formed two experiments...
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Tài liệu Báo cáo khoa học: A facile method for expression and purification of the Alzheimer’s disease-associated amyloid b-peptide pdf
... incu-bated for 4 days with each of the peptides (10 lm), andcells were fixed and used for immunocytochemical analyses.ImmunocytochemistryNeurons were fixed in 4% paraformaldehyde for 20 minat ... to transformed Ca2+-competent E. colicells (ER2566) by heat shock. The transformed cells werespread on LB agar plates containing ampicillin(50 mgÆL)1), single colonies were picked for 2 ... performed inpositive reflector mode, collecting data from approximately3000 and 5000 single laser shots for MS and MS ⁄ MS anal-yses, respectively.Preparation of aggregate-free monomer for fibrillation...
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