Báo cáo khoa học: "Learning Bigrams from Unigrams" pptx

... 656–664, Columbus, Ohio, USA, June 2008. c 2008 Association for Computational Linguistics Learning Bigrams from Unigrams Xiaojin Zhu † and Andrew B. Goldberg † and Michael Rabbat ‡ and Robert Nowak § † Department ... improve the accuracy of ordered- document recovery from a bag-of-words. Our approach opens the door to novel phenomena, for example, privacy leakage from index files. 1 I...

Ngày tải lên: 23/03/2014, 17:20

... experiments on part-whole ex- traction from a corpus of anatomy defi- nitions, using a fully automatic iterative algorithm to learn simple lexico-syntactic patterns from multiword terms. The ex- periments ... work. 2 Related Work Early work on knowledge extraction from elec- tronic dictionaries used lexico-syntactic patterns to build relational records from definitions. This in- cluded...

Ngày tải lên: 17/03/2014, 06:20

Ngày tải lên: 24/03/2014, 03:20

... 2012. c 2012 Association for Computational Linguistics Learning the Latent Semantics of a Concept from its Definition Weiwei Guo Department of Computer Science, Columbia University, New York, NY, ... discover more overlapping words. How- ever, exact word matching is lossy. Below are two definitions from WN: bank#n#1: a financial institution that accepts deposits and channels the money into...

Ngày tải lên: 19/02/2014, 19:20

... instances), from the TimeBank corpus annotated in TimeML (Pustejovky et al., 2003). The non- WSJ articles (mainly political and disaster news) include both print and broadcast news that are from ... two peaks in this distribution. One is from 5 to 7 in the natural logarithmic scale, which corresponds to about 1.5 minutes to 30 minutes. The other is from 14 to 17 in the natural l...

Ngày tải lên: 20/02/2014, 12:20

... automat- ically learning effective dialogue strategies, generated from a library of dialogue content, using reinforcement learning from user feed- back. This library includes greetings, so- cial ... can automatically compose a dialogue strategy from a li- brary of dialogue components, that is very similar to a manually designed expert strategy, by learning from user feedback. Thus, in...

Ngày tải lên: 20/02/2014, 12:20

... relevance, none of them are unjustifiably remote from the current focus of a parse state. The feature collection is basically independent from the supervised parse action acquisition. Before ... summarizes the evaluation results of translating 32 randomly selected sentences from our Wall Street Journal corpus from English to German. Besides our system, CONTEX, we tested three com...

Ngày tải lên: 22/02/2014, 03:20

... languages from non-parallel multilingual corpora in an unsupervised fashion. For this purpose, we assume a generative model for multilingual corpora, where each sentence is generated from a language ... borrowing from nearby languages, and 3) the innate abilities of humans (Chomsky, 1965). We assume hidden commonalities in syntax across languages, and try to extract a common grammar fr...

Ngày tải lên: 07/03/2014, 22:20

... approach, C is induced independently from F, and used in addition to F in supervised learning, i.e., F ∪ C. In contrast, in our method H is directly induced from F with the help of an existing ... feature h m . This assumption prevents two condensed fea- tures from containing the same original feature, and some original features from not being mapped to any condensed feature. Namely,...

Ngày tải lên: 07/03/2014, 22:20

... null label is NO-REL. train/test split from Table 1 and the feature sets: Syntactic The syntactic features from Section 4. Semantic The semantic features from Section 4. All Both syntactic and ... relations and 77.8% on causal re- lations. We trained machine learning mod- els using features derived from WordNet and the Google N-gram corpus, and they out- performed a variety of baselin...

Ngày tải lên: 08/03/2014, 01:20