Báo cáo khoa học: "A Word-Class Approach to Labeling PSCFG Rules for Machine Translation" pot

... Association for Computational Linguistics, pages 1–11,Portland, Oregon, June 19-24, 2011.c2011 Association for Computational LinguisticsA Word-Class Approach to Labeling PSCFG Rules for Machine ... word-alignments to suggest lexical relationships, they dif-fer in the way in which they assign labels to non-terminal symbols of PSCFG rules. Chiang (2005)describes a procedure to extract PSCFG rules ... clus-tering approaches, we ﬁrst need to decide how to de-termine the number of word classes, N. A straight-forward approach is to run experiments and reporttest set results for many different...

Báo cáo khoa học: "A Flexible Approach to Natural Language Generation for Disabled Children" pdf

... July 2006.c2006 Association for Computational LinguisticsA Flexible Approach to Natural Language Generation for Disabled Children Pradipta Biswas School of Information Technology Indian ... used as speech -to- speech translator between English and Mandarin Chinese. The NLG part of this system uses trigram language model for selecting appropriate inflectional form for target language ... binding theory. For this reason it is claimed to be as well founded as any plan-based approach. As another practical example of NLG technique, we can consider the IBM MASTOR system (Liu et....

Báo cáo khoa học: "A Hierarchical Approach to Encoding Medical Concepts for Clinical Notes" docx

... information,has outperformed machine learning models whichonly use n-gram features. The rules were manuallytuned for every ICD-9-CM code found in the chal-lenge training data set and therefore ... researchers tried to encode do-2http://www.nlm.nih.gov/mesh/3http://www.nlm.nih.gov/research/umls/Total radiology records 1,954Total tokens 51,940Total ICD-9-Codes 45Total code instances ... 67–72,Columbus, June 2008.c2008 Association for Computational LinguisticsA Hierarchical Approach to Encoding Medical Concepts for Clinical NotesYitao ZhangSchool of Information TechnologiesThe University...

Báo cáo khoa học: "A Probabilistic Approach to Syntax-based Reordering for Statistical Machine Translation" potx

... probability Pr(S → S). In order to conform to the log-linear model used in the de-coder, we integrate the two factors by defining thetotal score of T as formula 3:exp(λrlogPr(S →S) +iλiFi(S→T ... then fed to stan-dard phrase-based decoder to produce theoptimal translation. Experiments show that, for the NIST MT-05 task of Chinese -to- English translation, the proposal leads to BLEU improvement ... short distance reordering issolely defined by distortion limit.Syntax1is certainly a potential solution to globalreordering. For example, for the last two Chinesephrases in figure 1(a), simply...

Báo cáo khoa học: "A Connectionist Approach to Prepositional Phrase Attachment for Real World Texts" docx

... network-based approach to prepositional phrase attachment disam- biguation for real world texts. Although the use of semantic classes in this task seems intuitively to be adequate, methods employed to ... sense. As a result, before deciding attachment, it is first necessary to determine the correct sense for each word. 3 None of the preceding methods used classes for verbs. 4 For reasons of complexity, ... also inadequate to omit n2. Rule based approaches also come up against this problem. In Brill and Resnik (1994), for instance, for reasons of run-time efficiency and complexity, rules regarding...

Báo cáo khoa học: "A Comparative Study on Reordering Constraints in Statistical Machine Translation" potx

... graphs for a bottom-topsearch with the IBM constraints is described in(Uefﬁng et al., 2002). These methods cannot beapplied to the CYK-style search for the ITG con-straints. Here, the idea for ... prun-ing technique is threshold pruning: the idea is to re-move all hypotheses that have a low probability rela-tive to the best hypothesis. Therefore, we introducea threshold pruning parameter ... worse when a trigram language model isused. Therefore, pruning techniques are obligatory to reduce the translation time.Pruning is applied to hypotheses that translate thesame subsequence fjrjlof...

Báo cáo khoa học: "A PROPER TREATMEMT OF SYNTAX AND SEMANTICS IN MACHINE TRANSLATION" potx

... postpositions, there are no formal computational rules to perform it. So we must find and store heuristic rules empirically and then make proper use of them. Some heruistic rules to select appropriate ... especially for metaphorical expressions. A bird could also use binoculars. Table 3 Rules for Assigning Syntactic Roles to Phrasal Elements Pattern to be Scanned New Pattern to be Generated TOGOV~ ... is still enough for the arguments in this paper• III SYNTAX DIRECTED APPROACH: A PROTOTYPE ENGLISH-JAPANESE MACHINE TRANSLATION SYSTEM So far we have developed two prototype machine translation...

Tài liệu Báo cáo khoa học: "A Bootstrapping Approach to Named Entity Classification Using Successive Learners" pdf

... bootstrapping approach to named entity (NE) classification. This approach only requires a few common noun/pronoun seeds that correspond to the concept for the target NE type, e.g. he/she/man/woman for ... procedure can hardly learn IsA-based rules. Therefore, we add the following IsA-based rules to the top of the decision list: IsA(seed)Æ tag of the seed, for example: IsA(man) Æ PER IsA(city) ... method for PER NE, LOC NE, and ORG NE are 5%, 6%, and 34% respectively. The performance for PER and LOC are above 80%, approaching the performance of supervised learning. The reason for the...

Tài liệu Báo cáo khoa học: "A PRAGMATICBASED APPROACH TO UNDERSTANDING" pdf

... C3200 before moving on to investigate a plan for CS263. Since the teacher of C3200 has nothing to do with the plan for taking C3263, the mechanisms for retaining dialogue context will fail to iden- ... date for the AS conference is in February. Recourse to such a belief model is necessary in order to allow for Yes-No questions to which the answer is "No" and yet eliminate potential ... such questions implicitly by proceding to answer the question or to seek information relevant to formulat- ing an answer. However IS may refuse to accept the question posed by IP because...

Tài liệu Báo cáo khoa học: "A HYBRID APPROACH TO REPRESENTATION IN THE JANUS NATURAL LANGUAGE PROCESSOR" pot

... representational capacity to make such definitions, we have chosen as part of our design no_._tt to use it. For to use it, would mean stepping outside of NIKL to specify constants, and therefore, that the ... in formulae that lexical items map to. For instance, vessel and ship map to VESSEL. In the example above regarding pilot, the constants were PER- SON, FLYING-EVENT, and ACTOR; in the formula ... for knowledge acquisition. KNACQ presents the user with a few questions and menus to elicit the English expressions used to refer to. that concept or role. To illustrate the kinds of information...

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