期刊
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
卷 34, 期 11, 页码 5182-5195出版社
IEEE COMPUTER SOC
DOI: 10.1109/TKDE.2021.3054853
关键词
Reliability; Bayes methods; Social networking (online); Neural networks; Hidden Markov models; Unsupervised learning; Probability distribution; Truth discovery; unsupervised learning; autoencoder; Bayesian network; social network
类别
资金
- Singapore Ministry of Education Academic Research Fund Tier 2 grant [MOE2018-T2-2-019]
- A*STAR under its RIE2020 Advanced Manufacturing and Engineering (AME) Industry Alignment Fund - Pre Positioning (IAF-PP) [A19D6a0053]
This study investigates the problem of estimating event truths from conflicting agent opinions in a social network. An autoencoder learns the complex relationships between event truths, agent reliabilities, and agent observations, guided by a Bayesian network model. The proposed approach is unsupervised and applicable in the absence of ground truth labels. Experimental results demonstrate its competitiveness and superiority over several benchmark methods.
The problem of estimating event truths from conflicting agent opinions in a social network is investigated. An autoencoder learns the complex relationships between event truths, agent reliabilities and agent observations. A Bayesian network model is proposed to guide the learning process by modeling the relationship of the autoencoder's outputs with different variables. At the same time, it also models the social relationships between agents in the network. The proposed approach is unsupervised and is applicable when ground truth labels of events are unavailable. A variational inference method is used to jointly estimate the hidden variables in the Bayesian network and the parameters in the autoencoder. Experiments on three real datasets demonstrate that our proposed approach is competitive with, and in most cases better than, several state-of-the-art benchmark methods.
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