Báo cáo khoa học: "Using Predicate-Argument Structures for Information Extraction" ppt

... longer afford to waste human time and effort building manually these ever changing and in- complete databases or design language specific applications to solve this problem. The need for an automatic ... intermingled. Parallel texts (texts that are mutual transla- tions) are valuable sources of information for bilingual lexicography. However, they are not of much use unless a computati...

Ngày tải lên: 20/02/2014, 18:20

... sentiment information. In our experiments, we show how the model can leverage document-level sentiment annotations of a sort that are abundant online in the form of consumer reviews for movies, ... Pham, Dan Huang, Andrew Y. Ng, and Christopher Potts Stanford University Stanford, CA 94305 [amaas, rdaly, ptpham, yuze, ang, cgpotts]@stanford.edu Abstract Unsupervised vector-based approaches...

Ngày tải lên: 20/02/2014, 04:20

... allows that use of future information in ad- dition to past information. The pipeline model nat- urally allows access to all the past information. Algorithm 3 Pseudo code for the look ahead algo- rithm. ... languages. Dependency structures are more efficient to parse (Eisner, 1996) and are believed to be easier to learn, yet they still capture much of the predicate-argument informa...

Ngày tải lên: 20/02/2014, 12:20

... competitive with the standard n-gram language model while extracting additional structural information useful for speech understanding. 1 Introduction The question of how to integrate high-level knowl- edge ... a score, used to rank parse candidates. For parsing of strings, the score for a chart edge is the product of the scores of any child edges and the score for the creation of t...

Ngày tải lên: 20/02/2014, 15:21

... TEXTS FOR INFORMATION RETRIEVAL N.J. Belkin, B.G. Michell, and D.G. Kuehner University of Western Ontario The representation of whole texts is a major concern of the field known as information ... following: a. A user, recognizing an information need, presents to an IR mechanism (i.e., a collection of texts, with a set of associated activities for representing, stor- ing, ma...

Ngày tải lên: 21/02/2014, 20:20

... Web-mining algorithm presented in this pa- per is similar to the PMI-IR (Pointwise Mutual Information - Information Retrieval) described in (Turney, 2001). Turney uses PMI and Web retrieval to decide ... sta- tistical methods irrelevant. A number of techniques used for finding collocations and co-occurrences of words, such as mutual information, may well be used to search co-occurrence...

Ngày tải lên: 08/03/2014, 07:20

... an expected parse path for a declarative response, and the parse ~path for a de- clarative into a path for an expected question, etc. The left-hand side of a transforma- tion is a pattern ... only one transforma- tion and applying it only once. A special feature of our transformational system is the automatic allowance for dialogue diexis. An expected parse path for the a...

Ngày tải lên: 08/03/2014, 18:20

... emphasis 50 Sents Prons 1 754 134 2 785 116 3 318 153 4 268 135 5 271 135 Table 8: Corpus Information because this anaphora resolution algorithm can be encoded in terms of the GR information (Preiss and Briscoe, 2003). For each pronoun, this algorithm ... antecedent. 6.2 Using GR Information The algorithm uses GR information at two points: initially, it is used to eliminate certain...

Ngày tải lên: 08/03/2014, 21:20

... domain. 4.1 Reference Forms for Reasons Three reference forms have been identified by the author for reasons in naturally occurring proofs (Huang, 1990): 1. The omit form: where a reason ... izations. 2. the omit form: in this case a word such as "thus" or "therefore" will be used. 3. The implicit form: Similar to the implicit form for the expression...

Ngày tải lên: 08/03/2014, 21:20

... message- level event structures to newswire texts. Although the need to recognise events has been widely acknowledged, most approaches to information extraction (IE) perform this task either ... 1). Two of the analysis modules perform a certain amount of island-driven parsing (one extracts time-related infor- mation, and the other location-related information) , and the third is...

Ngày tải lên: 08/03/2014, 07:20