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arXiv 2602.08347stat.MEmath.STstat.TH
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利用Pitman-Yor过程估计香农熵

Estimating the Shannon Entropy Using the Pitman--Yor Process

Joint Graduate School of Mathematics for Innovation, Kyushu University(九州大学数学创新联合研究生院);Faculty of Mathematics, Kyushu University(九州大学数学学院)

Takato Hashino, Koji Tsukuda

AI总结:

本文提出基于Pitman-Yor过程的熵估计方法,用于解决物种数量未知时的多样性评估问题,通过无限维过程近似提升估计稳定性,并通过实验验证方法有效性。

摘要:

香农熵是信息论、生态学和遗传学等领域中量化多样性及模型复杂度的基本度量。然而,许多现有研究假设物种数量已知,这一假设在实践中往往不现实。近年来,人们努力放松这一限制。受这些进展的启发,本研究提出了一种基于Pitman-Yor过程的熵估计方法,这是贝叶斯非参数学派中的代表性方法。通过将真实分布近似为无限维过程,所提出的方法即使在观察到的物种数量少于真实物种数量时也能实现稳定的估计。该方法为处理物种多样性中的不确定性提供了系统的方法,增强了基于熵的多样性评估的可靠性和鲁棒性。此外,我们研究了正则变化分布下香农熵的收敛性质,并利用这一结果建立了所提出估计器的一致性。最后,我们通过数值实验展示了所提出方法的有效性。

英文摘要:

The Shannon entropy is a fundamental measure for quantifying diversity and model complexity in fields such as information theory, ecology, and genetics. However, many existing studies assume that the number of species is known, an assumption that is often unrealistic in practice. In recent years, efforts have been made to relax this restriction. Motivated by these developments, this study proposes an entropy estimation method based on the Pitman--Yor process, a representative approach in Bayesian nonparametrics. By approximating the true distribution as an infinite-dimensional process, the proposed method enables stable estimation even when the number of observed species is smaller than the true number of species. This approach provides a principled way to deal with the uncertainty in species diversity and enhances the reliability and robustness of entropy-based diversity assessment. In addition, we investigate the convergence property of the Shannon entropy for regularly varying distributions and use this result to establish the consistency of the proposed estimator. Finally, we demonstrate the effectiveness of the proposed method through numerical experiments.

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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