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Activity Number: 587 - Risk Modeling
Type: Contributed
Date/Time: Wednesday, August 1, 2018 : 2:00 PM to 3:50 PM
Sponsor: Section on Risk Analysis
Abstract #330180 Presentation
Title: Variational EM Type Algorithm Using Divergences:Applications to Privacy Analytics
Author(s): Lei Li* and Anand N Vidyashankar
Companies: George Mason University and George Mason University
Keywords: Variational inference; EM type algorithm; privacy metrics; social media
Abstract:

Variational inference is gaining popularity in the analysis of network data. However, several challenges in the implementation of the algorithm exist. One of the key challenges concerns the choice of variational family. Furthermore, the distribution of the observed data tends to be misspecified. In this presentation we describe a new algorithm, VDMIX, to provide robust and efficient estimates of the parameters. We also present results on the computational complexity of the algorithm and provide comparisons with the traditional variational algorithm. We apply our results to obtain estimates of privacy risk in networked data sets.


Authors who are presenting talks have a * after their name.

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