LDA模型的流Gibbs抽样
Streaming Gibbs Sampling for LDA Model
摘要:
流变分贝叶斯(SVB)是成功的学习LDA模型在线的方式。然而,以前的尝试发展在线蒙特卡罗方法LDA几乎没有成功,往往有更糟糕的困惑比他们的批处理同行。我们提出了一个流吉布斯采样(SGS)的方法,一个在线扩展的崩溃吉布斯采样(CGS)。我们的实证研究表明,SGS可以达到与CGS相似的困惑,远远优于SVB。我们的分布式SGS版本DSGS比SVB更具可伸缩性,主要是因为更新的通信复杂性很小。
英文摘要:
Streaming variational Bayes (SVB) is successful in learning LDA models in an online manner. However previous attempts toward developing online Monte-Carlo methods for LDA have little success, often by having much worse perplexity than their batch counterparts. We present a streaming Gibbs sampling (SGS) method, an online extension of the collapsed Gibbs sampling (CGS). Our empirical study shows that SGS can reach similar perplexity as CGS, much better than SVB. Our distributed version of SGS, DSGS, is much more scalable than SVB mainly because the updates' communication complexity is small.
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