Báo cáo khoa học: "Dependency Parsing and Projection Based on Word-Pair Classiﬁcation" ppt

Tài liệu Báo cáo khoa học: "Predicting Unknown Time Arguments based on Cross-Event Propagation" ppt

... 4 Approaches Based on these motivations we have developed two approaches to conduct cross-event propaga-tion. Section 4.1 below will describe the rule- based approach and section 4.2 will present ... event mention and all of its coreferential event mentions do not include any explicit or implicit time expressions; and therefore its time argument can only be predicted based on other related ... learning framework respectively. 4.1 Rule based Prediction The easiest solution is to encode rules based on constraints from event arguments and positions of two events. We design three types...

Báo cáo khoa học: "DETERMINISTIC PARSING AND UNBOUNDED DEPENDENCIES" ppt

... use parsing states to maintain information about the nature of the left context. Rules of application and composition (with various resa'ictions on the directionaiity of reduction and ... deterministic parsing. However, their conclusion is based on critiques of various versions of the Marcus parser which represents only one of many possible approaches to deterministic parsing. We ... moves to the reduction phase and attempts a reduction between Ceil2 and Cell3 using rules of backward and forward application and a more constrained rule of forward composition. If this fails,...

Tài liệu Báo cáo khoa học: Structure determination and biochemical studies on Bacillus stearothermophilus E53Q serine hydroxymethyltransferase and its complexes provide insights on function and enzyme memory doc

... present close to the positioncorresponding to the second conformation of thecarboxylate group (Fig. 2A,B). The hydrogen bondingbetween Q53 and the second conformation of carbo-xylate of Gly ... in two distinct conformations inE53QbsSHMT-Gly. In one conformation, the carbox-ylate group forms hydrogen bonds with R357, as inbsSHMT-Gly [12]. In the second conformation, thecarboxylate ... usingtwo syringes, one containing the enzyme (500 lm) and theother containing Gly (100 mm) or Gly and THF (70 lm)orGly and FTHF (200 lm). The contents were mixed and thereaction was initiated....

Tài liệu Báo cáo khoa học: "Combining Functionality and Object Orientedness for Natural Language Processing" ppt

... expressions are constructed only with a binary form of function application. Thus, if z and I/ are well-formed formulas of PAL, so is a form z(y). Expressions of PAL are related to expressions ... memory component attempts to understand the input in terms of its empirical knowledge, predict what happens next, and reorganize its knowledge based on new observations. Additionally, we assume ... notion of eompositionality a and an object-oriented computational mechanism to explore a principled and flexible way of organizing linguistic knowledge. 2. Intermediate Representation and...

Tài liệu Báo cáo khoa học: "Analysing Wikipedia and Gold-Standard Corpora for NER Training" ppt

... similarapproach to personal names including of, whichalso act as noise.Fixing tokenization Hyphenation is a problemin tokenisation: should London -based be one token,two, or three? Both BBN and CoNLL treat ... useful for both tagger evalua-tion and cross-corpus evaluation, e.g. BBN versusCoNLL on a BBN test set. This involves findingconfusion matrix entries where BBN and CoNLL’sperformance differs significantly, ... to explore intra- and inter-corpusconsistency in MUC, CoNLL, and BBN in Section 4.3.1 N-gram tag variationDickinson and Meurers (2003) present a clevermethod for finding inconsistencies within...

Tài liệu Báo cáo khoa học: "Deriving Verbal and Compositional Lexical Aspect for NLP Applications" pptx

... representations: aspectual inter- pretations that arise only in the presence of other constituents may be removed from the lexicon and derived compositionally. Our modified LCS lexicon theu ... sentential lexical aspect as monotonic composition of the same type, and to identify the contribution of both verbs and other elements. The lexical aspect of verbs and sentences may be therefore ... verbs alone and in sentential contexts using Lexical Conceptual Structure (LCS) representations of verbs in the classes cataloged by Levin (1993). We show how proper consideration of these...

Báo cáo khoa học: "Combining Statistical and Knowledge-based Spoken Language Understanding in Conditional Models" pptx

... major contribution of this paper is the investigation of integrating prior knowledge and statistical learning in a conditional model framework. We also study and compare conditional random ... given the observation sequence and label sequence, and the conditional expectation given the observation sequence alone. With the Markov assumption in Eq. (2), these expectations can be computed ... word sequence and the subsequences covered by CFG non-terminals. 3.1 CRFs and HCRFs Conditional Random Fields (CRFs) (Lafferty, McCallum et al., 2001) are undirected conditional graphical...

Báo cáo khoa học: "Japanese Named Entity Recognition based on a Simple Rule Generator and Decision Tree Learning" pdf

... recognition is atask in which proper nouns and nu-merical information in a document aredetected and classiﬁed into categoriessuch as person, organization, location, and date. NE recognition plays ... categories such as person, organiza-tion, location, and date. NE recognition playsan essential role in information extraction sys-tems (see MUC documents (1996)) and ques-tion answering systems ... ORGANIZATION,0,0.*:*:location-name,SHI-NAI:*:common-noun-> LOCATION,0,1.*:*:location-name,*:*:common-noun-> ORGANIZATION,0,0.The ﬁrst rule extracts CNN as an organization.The second rule...

Báo cáo khoa học: "Combining Stochastic and Rule-Based Methods for Disambiguation in Agglutinative Languages" pptx

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Báo cáo khoa học: "EXPERT SYSTEMS AND OTHER NEW TECHNIQUES IN MT SYSTEMS " ppt

... specification must specify a relation (not a function) between strings and trees~ or trees and trees : many trees may correspond to one string, and, conversely, many strings may correspond to one ... towards the reconciliation of "natural" and "coded" dictionaries, and towards the construc- tion of automated verification and indexing tools. Natural dictionaries are usually ... definition and use of specification formalisms ("static grammars") and verification tools. Lexical knowledge processin~ In the long run, dictionaries turn out to be the costliest components...

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