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arXiv 1206.2190cs.LG
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通信高效的并行置信传播潜在Dirichlet分配算法

Communication-Efficient Parallel Belief Propagation for Latent Dirichlet Allocation

Soochow University(苏州大学);City University of Hong Kong(香港城市大学)

Jian-feng Yan, Zhi-Qiang Liu, Yang Gao, Jia Zeng

摘要:

提出了一种新的通信效率高的并行置信传播(CE-PBP)算法,用于训练潜在狄利克雷分配(LDA)。在同步置信传播算法的基础上,提出了一种基于并行结构的并行置信传播算法。由于大规模的通信延迟往往导致并行主题建模的效率低下,我们进一步使用Zipf定律来降低PBP中的总通信开销。在不同数据集上的大量实验表明,CE-PBP算法比并行Gibbs采样(PGS)算法具有更高的主题建模精度,并减少了80%以上的通信开销.

英文摘要:

This paper presents a novel communication-efficient parallel belief propagation (CE-PBP) algorithm for training latent Dirichlet allocation (LDA). Based on the synchronous belief propagation (BP) algorithm, we first develop a parallel belief propagation (PBP) algorithm on the parallel architecture. Because the extensive communication delay often causes a low efficiency of parallel topic modeling, we further use Zipf's law to reduce the total communication cost in PBP. Extensive experiments on different data sets demonstrate that CE-PBP achieves a higher topic modeling accuracy and reduces more than 80% communication cost than the state-of-the-art parallel Gibbs sampling (PGS) algorithm.

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