Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Distributed Variational Bayesian Algorithms Over Sensor Networks   Distributed inference/estimation in Bayesian framework in the context of
sensor networks has recently received much attention due to its broad
applicability. The variational Bayesian (VB) algorithm is a technique for
approximating intractable integrals arising in Bayesian inference. In this
paper, we propose two novel distributed VB algorithms for general Bayesian
inference problem, which can be applied to a very general class of
conjugate-exponential models. In the first approach, the global natural
parameters at each node are optimized using a stochastic natural gradient that
utilizes the Riemannian geometry of the approximation space, followed by an
information diffusion step for cooperation with the neighbors. In the second
method, a constrained optimization formulation for distributed estimation is
established in natural parameter space and solved by alternating direction
method of multipliers (ADMM). An application of the distributed
inference/estimation of a Bayesian Gaussian mixture model is then presented, to
evaluate the effectiveness of the proposed algorithms. Simulations on both
synthetic and real datasets demonstrate that the proposed algorithms have
excellent performance, which are almost as good as the corresponding
centralized VB algorithm relying on all data available in a fusion center.

30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th