-
Ku, L.-W.; Ho, H.-W.; Chen, H.-H.: Opinion mining and relationship discovery using CopeOpi opinion analysis system (2009)
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- Abstract
- We present CopeOpi, an opinion-analysis system, which extracts from the Web opinions about specific targets, summarizes the polarity and strength of these opinions, and tracks opinion variations over time. Objects that yield similar opinion tendencies over a certain time period may be correlated due to the latent causal events. CopeOpi discovers relationships among objects based on their opinion-tracking plots and collocations. Event bursts are detected from the tracking plots, and the strength of opinion relationships is determined by the coverage of these plots. To evaluate opinion mining, we use the NTCIR corpus annotated with opinion information at sentence and document levels. CopeOpi achieves sentence- and document-level f-measures of 62% and 74%. For relationship discovery, we collected 1.3M economics-related documents from 93 Web sources over 22 months, and analyzed collocation-based, opinion-based, and hybrid models. We consider as correlated company pairs that demonstrate similar stock-price variations, and selected these as the gold standard for evaluation. Results show that opinion-based and collocation-based models complement each other, and that integrated models perform the best. The top 25, 50, and 100 pairs discovered achieve precision rates of 1, 0.92, and 0.79, respectively.
-
Condron, L.; Tittemore, C.P.: Library catalogs on the Web (2002)
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Burke, L.: Designing a new urban Internet (2002)
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-
Rudner, L.: Who is going to mine digital library resources? : anf how? (2000)
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Levy, D.M.: Digital libraries and the problem of purpose (2000)
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Domingue, J.; Motta, E.: PlanetOnto : from news publishing to integrated knowledge management support (2000)
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- Date
- 14. 8.2002 11:47:22
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Thelwall, M.; Vaughan, L.: Webometrics : an introduction to the special issue (2004)
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Robinson, L.; Bawden, D.: Libraries and open society : Popper, Soros and digital information (2001)
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Robinson, L.: ¬A strategic approach to research using Internet tools and resources (2000)
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Lavoie, B.F.; O'Neill, E.T.: How "World Wide" Is the Web? : Trends in the Internationalization of Web Sites (2001)
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- Date
- 7.10.2002 9:22:14
-
Thelwall, M.; Vaughan, L.; Björneborn, L.: Webometrics (2004)
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Adcock, L.: Building a virtual music library : towards a convergence of classification within Internet-based catalogues (2001)
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Björneborn, L.; Ingwersen, P.: Toward a basic framework for Webometrics (2004)
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Liew, C.L.; Foo, S.; Chennupati, K.R.: ¬A proposed integrated environment for enhanced user interaction and value-adding of electronic documents : an empirical evaluation (2001)
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Shen, X.; Li, D.; Shen, C.: Evaluating China's university library Web sites using correspondence analysis (2006)
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- Date
- 22. 7.2006 16:40:18
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Hill, L.L.; Carver, L.; Larsgaard, M.; Dolin, R.; Smith, T.R.; Frew, J.; Rae, M.-A.: Alexandria Digital Library : end user evaluation studies and system design (2000)
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Wenyin, L.; Chen, Z.; Li, M.; Zhang, H.: ¬A media agent for automatically builiding a personalized semantic index of Web media objects (2001)
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