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Abstract:
Modeling interpersonal influence on different sentiments is a key issue for opinion formation and viral marketing. Previous works directly define interpersonal influence on each pair of users. They fail to depict the unobserved relationships between user pairs and thus suffer from the overfitting problem of learning users' influences. Moreover, there are still not effective solutions to integrate users' sentiments to understand the interpersonal influence. Therefore, we propose a user's distributed representation model with sentimental factors. Firstly, two low-dimensional parameter matrices are applied to represent opinion propagators' influences and opinion recipients' susceptibility on different sentiments. And then, we describe cascade behaviors with the survival analysis model. Finally, the imbalance of positive and negative cases is solved by employing negative case sampling technique, according to the distribution of infected users' frequency. Experimental results conducted on Microblog database with different sentiments showed that, compared to the state-of-the-art models, our model improved 273% and 32.4% on MRR metrics on "Predicting Cascade Dynamics" and "Who will Be Retweeted" tasks respectively, and reduced 10.46% on MAPE metrics on "Cascade Size Predicting" task, which verified the validity of our model. Besides, analyzing the distribution of learned users' sentimental influences and susceptibilities resulted in some important discoveries. © 2017, Science Press. All right reserved.
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Source :
Chinese Journal of Computers
ISSN: 0254-4164
Year: 2017
Issue: 4
Volume: 40
Page: 955-969
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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