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arXiv 2004.03139cs.LGcs.ITeess.SPmath.ITstat.ML
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基于Rényi信息测度的主动递归贝叶斯推理

Active recursive Bayesian inference using Rényi information measures

Northeastern University(东北大学);University of Pittsburgh(匹兹堡大学)

Yeganeh M. Marghi, Aziz Kocanaogullari, Murat Akcakaya, Deniz Erdogmus

摘要:

递归贝叶斯推理(RBI)提供了最佳的贝叶斯潜在变量估计在实时设置与流噪声观测。主动RBI试图有效地选择查询,导致更多信息的观察,以快速减少不确定性,直到做出自信的决定。然而,通常推理和查询机制的最优性目标不是联合选择的。此外,传统的主动查询方法由于误导性的先验信息而错开。受信息论方法的启发,我们提出了一个主动RBI框架,通过Renyi熵和$α$ -发散统一的推理和查询选择步骤。我们还提出了一个新的目标的基础上Renyi熵和它的变化称为动量,鼓励探索误导以前的情况。所提出的主动RBI框架被应用于概率单纯形中的后验变化的轨迹,该概率单纯形提供了具有指定置信度的协调主动查询和决策。在一定的假设下,我们分析表明,所提出的方法优于传统的方法,如互信息,允许选择不太可能的事件。我们目前的经验和实验性能评估的两个应用程序:餐厅推荐和脑机接口(BCI)打字系统。

英文摘要:

Recursive Bayesian inference (RBI) provides optimal Bayesian latent variable estimates in real-time settings with streaming noisy observations. Active RBI attempts to effectively select queries that lead to more informative observations to rapidly reduce uncertainty until a confident decision is made. However, typically the optimality objectives of inference and query mechanisms are not jointly selected. Furthermore, conventional active querying methods stagger due to misleading prior information. Motivated by information theoretic approaches, we propose an active RBI framework with unified inference and query selection steps through Renyi entropy and $α$-divergence. We also propose a new objective based on Renyi entropy and its changes called Momentum that encourages exploration for misleading prior cases. The proposed active RBI framework is applied to the trajectory of the posterior changes in the probability simplex that provides a coordinated active querying and decision making with specified confidence. Under certain assumptions, we analytically demonstrate that the proposed approach outperforms conventional methods such as mutual information by allowing the selections of unlikely events. We present empirical and experimental performance evaluations on two applications: restaurant recommendation and brain-computer interface (BCI) typing systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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