Báo cáo khoa học: "Automatic Discovery of Named Entity Variants – Grammar-driven Approaches to Non-alphabetical Transliterations" pptx

... Proceedings of the ACL 2007 Demo and Poster Sessions, pages 15 3–1 56,Prague, June 2007.c2007 Association for Computational LinguisticsAutomatic Discovery of Named Entity Variants – Grammar-driven Approaches ... characteris-tics of a transliterated NE’s in CGC are exploited to allow discovery of transliteration variations withoutreferring to original NE.• frequent co-occurrence of named entitieswithin ... Introduction Named Entity Recognition (NER) is one of the mostdifﬁcult problems in NLP and Document Under-standing. In the ﬁeld of Chinese NER, several approaches have been proposed to recognize...

Báo cáo khoa học: "Automatic Acquisition of Named Entity Tagged Corpus from World Wide Web" pot

... Automatic Acquisition of Named Entity Tagged Corpus from World WideWebJoohui AnDept. of CSEPOSTECHPohang, Korea 790-784minnie@postech.ac.krSeungwoo LeeDept. of CSEPOSTECHPohang, ... andsubsequently the porting of a machine learning sys-tem to another domain is much easier than that of arule-based one. Various supervised learning meth-ods for Named Entity (NE) tasks were successfullyapplied ... generation of NE tagged corpusfrom the websiderations in this marking process because of theword ambiguity and boundary ambiguity of NE in-stances. To overcome these ambiguities, the auto-matic...

Tài liệu Báo cáo khoa học: "Robust Extraction of Named Entity Including Unfamiliar Word" doc

... effectiveness of the proposedmethod.2 Extraction of Japanese Named Entity 2.1 Task of the IREX WorkshopThe task of NE extraction of the IREX workshop(Sekine and Eriguchi, 2000) is to recognize ... (kyou) (today) Noun–Adverbial 今日 (kyou) (today) Noun–Adverbial 1, 0, 0, 0 Oの (no) gen Particle の (no) gen Particle 0, 1, 0, 0 O石狩 (Ishikari) (Ishikari) Noun–Proper 関東 (Kantou) (Kantou) Noun–Proper ... of NLP (Tjong Kim Sang, 1999). This representationuses the following three labels.B Current token is the beginning of a chunk.I Current token is a middle or the end of achunk consisting of...

Báo cáo khoa học: "Joint Inference of Named Entity Recognition and Normalization for Tweets" doc

... source of fresh information. As a re-sult, the task of named entity recognition (NER)for tweets, which aims to identify mentions of rigiddesignators from tweets belonging to named- entity types ... Hereafter, we use tm to denote the mthtweet ,timand yim to denote the ithword of of tmand its BILOU label, respectively, andfim to denote the factor related to yi−1mand yim. ... mention of entities of predeﬁned typesfor each tweet; and 2) to restore each entity mentioninto its unambiguous canonical form. Following Liuet al. (2011), we focus on four types of entities,...

Báo cáo khoa học: "Learning Translations of Named-Entity Phrases from Parallel Corpora" ppt

... range of types of entities are often named In software man-uals, for example, named- entity expressions in-259clude names of menu items, dialogue boxes, soft-ware systems, etc. While named- entity ... translations.2 The Named- Entity Phrase TranslationTask Named- entity expressions (Chinchor and Marsh,1997) are any words or phrases that name a spe-cific entity. While often thought of in terms of categories ... the results of our evaluation on a named- entity phrase transla-tion task. We pay particular attention to the subset of the data that lacks the special characteristics of the named- entity task...

Tài liệu Báo cáo khoa học: "Automatic Extraction of Lexico-Syntactic Patterns for Detection of Negation and Speculation Scopes" pdf

... LinguisticsAutomatic Extraction of Lexico-Syntactic Patterns for Detection of Negationand Speculation ScopesEmilia ApostolovaDePaul UniversityChicago, IL USAemilia.aposto@gmail.comNoriko TomuroDePaul ... children (starting from the root of the subtree) to the rule pattern subtree. Nodes of type *scope* and * match any number of nodes,similar to the semantics of Regex Kleene star (*).5 ResultsAs ... scope discovery (Apostolova and Tomuro,2010). The system, inspired by the NegEx algorithm(Chapman et al., 2001), uses a list of phrases splitinto subsets (preceding vs. following their scope) to identify...

Tài liệu Báo cáo khoa học: "Inducing Gazetteers for Named Entity Recognition by Large-scale Clustering of Dependency Relations" ppt

... classes of gazetteers. For example, wecan use automatically extracted hyponymy relations(Hearst, 1992; Shinzato and Torisawa, 2004), or au-tomatically induced MN clusters (Rooth et al., 1999;Torisawa, ... running on a cluster of PCs with a moderate amount of memory (e.g., 8GB). First, we decided to store the training exampleson a ﬁle since otherwise each node would need to store all the examples ... 70%. To cover most of the named entities in the data, we need much largergazetteers. A straightforward approach is to increasethe number of Web documents used for the MN clus-tering and to use...

Tài liệu Báo cáo khoa học: "Automatic learning of textual entailments with cross-pair similarities" ppt

... tree kernel (KT) with respect to the size of the two trees, we need to focus onlyon the part relevant to the implication.The anchored leaves are good indicators of rel-evant parts but also ... t, the set of its nodes N (t), and a set of anchors, we builda tree twith all the nodes Nthat are anchors orancestors of any anchor. Moreover, we add to tthe leaf nodes of the original ... according to such approaches, the hypotheses H1and H2are verysimilar and seem to be similarly related to T1. Thissuggests that we should study the properties anddifferences of such two...

Tài liệu Báo cáo khoa học: "Automatic Construction of Polarity-tagged Corpus from HTML Documents" docx

... are two sentences in each of the454(1) kono software-no riten-ha hayaku ugoku kotothis software-POST advantage-POS T quickly run to The advantage of this software is to run quickly.(2) ketten-hajikan-ga ... pres-453ence of opinion sentences are called indicators.Indicators for positive sentences are called positiveindicators. ’Pros’ is an example of positive indi-cator. Similarly, indicators for ... kakarisugiru koto-desuweakness-P OST time-P OST take too much to- POSTThe weakness is to take too much time.Figure 3: Instances of the linguistic pattern.third and fourth item. It is hard to precis...

Tài liệu Báo cáo khoa học: "Automatic Identification of Pro and Con Reasons in Online Reviews" ppt

... linked to Internet shopping malls such as ama-zon.com and epinions.com. The purpose of re-views in complaints.com is to share consumers’ mostly negative experiences and alert businesses to customers ... encourage people to buy more products or to use more services. Despite its significance, however, there is no hand-annotated data that we can use to build a system to identify reasons of complaints.com. ... are 35.49 and 25.89 respectively. The purpose of selecting one of electronics products and restaurants as topics of reviews for our study is to test our approach in two ex-tremely different...

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