Tài liệu Báo cáo khoa học: "Identifying Text Polarity Using Random Walks" pptx

... because identi- fying the polarity of text is the natural next step that should follow identifying subjective text. 3 Word Polarity We use a Markov random walk model to identify polarity of words. Assume ... (2005; 2006) use a textual representation of words by collating all the glosses of the word as found in some dictionary. Then, a binary text clas- sifier is trained using t...

Ngày tải lên: 20/02/2014, 04:20

... weighted sum, or removed candidates that didn’t match the polarity of questions, in order to extract the opinion answers. Algorithms based on Markov Random Walk have been proposed to solve different ... process. Every question is scored using nugget recall (NR) and an approximation to nugget precision (NP) based on length. The final score will be calculated using F measure with TAC offi...

Ngày tải lên: 20/02/2014, 07:20

... 5–8, Columbus, June 2008. c 2008 Association for Computational Linguistics Generating research websites using summarisation techniques Advaith Siddharthan & Ann Copestake Natural Language and Information ... stylesheets are often considered inappropriate for diverse organisations. Research summary pages using stylesheets can offer alternative methods of information access and browsin...

Ngày tải lên: 20/02/2014, 09:20

... Handing Context-Dependent Opinions As mentioned earlier, context-dependent opinion words (only adjectives and adverbs) must be determined by its contexts. We solve this problem by using the ... Nasukawa (2006) improved this work by using the idea of coherency. They deal with both adjectives and verbs. Ding et al. (2008) introduced the concept of feature context because the polarit...

Ngày tải lên: 20/02/2014, 05:20

... accuracy when trying to clas- sify sarcastic tweets; we therefore argue that using the tweets labeled by their authors using hashtag produces a better quality gold standard. We used a Twitter ... tweets as well as the lack of expli- cit context makes this classification task quite dif- ficult. In future work, we plan to investigate the impact of contextual features such as common gro...

Ngày tải lên: 20/02/2014, 05:20

... arabic. In Arabic NLP/MT Confer- ence. Ahmed Hassan and Dragomir Radev. 2010. Identifying text polarity using random walks. In ACL’10. Ahmed Hassan, Vahed Qazvinian, and Dragomir Radev. 2010. What’s ... on identifying text that presents opinion as opposed to objective text that presents factual information (Wiebe, 2000). Some approaches to subjectivity analysis disregard the conte...

Ngày tải lên: 20/02/2014, 05:20

... shown that most of these methods are quite effective in tra- ditional text classification applications. In past serval years, hierarchical text classification has become an active research topic in database ... Section 4 gives experimental analysis. Section 5 concludes the paper. 2 Hierarchical Text Classification In text classification, the documents are often rep- resented with vector s...

Ngày tải lên: 20/02/2014, 05:20

... aligned and compared using L04. 1 Results were analyzed using cluster analysis, composite clustering, and multidi- mensional scaling. The analyses showed that results obtained using aggregate analysis ... differences, since there was high correlation between differences ob- tained only by using vowels and by using complete transcriptions (r = 0.936). Two ways of aggregate analysis a...

Ngày tải lên: 20/02/2014, 12:20

... feasible task when var- ious textual, durational, and acoustic features are available. We build on their approach and show that we can get an improvement in accuracy when contextual information is ... per- son once in the conversation, is he more likely to disagree with him again? We model context using Bayesian networks that allows capturing of these pragmatic dependencies. Our accuracy fo...

Ngày tải lên: 20/02/2014, 16:20

... English. 1. Introduction When creating text using word processing software on a personal computer, it is common to refer to books or documents relevant to the text, including various kinds of dictionaries ... sentences. Users can easily send these sentences to text- input applications by drag-and-drop operation using a mouse. In addition, by using "Eisaku Pen", u...

Ngày tải lên: 20/02/2014, 18:20