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arXiv 1508.07403stat.ME
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占用模型的内禀贝叶斯分析

Intrinsic Bayesian Analysis for Occupancy Models

Daniel Taylor-Rodriguez, Andrew Womack, Claudio Fuentes, Nikolay Bliznyuk

摘要:

占据模型通常用于确定物种存在于给定地点的概率,同时考虑不完美的检测。这些模型所依据的调查数据往往包括关于几个预测因素的信息,这些预测因素可能表征生境适宜性和物种可探测性。由于这些变量可能并不都是相关的,因此模型选择技术在这方面是必要的。在实践中,模型选择是使用赤池信息准则(AIC)进行的,因为很少有其他替代方案可用。本文通过内在先验方法,建立了一个客观的贝叶斯变量选择框架的占用模型。该程序将先验模型空间,占测试的多重性,并尊重多项式层次的预测时,考虑高阶项。该方法是使用随机搜索算法,能够彻底探索大空间的占用模型。所提出的策略是完全自动的,并提供假阳性的控制,而不会牺牲真正有意义的协变量的发现。该方法的性能进行了评估,并通过仿真研究AIC相比。该方法说明了在文献中以前研究的两个数据集。

英文摘要:

Occupancy models are typically used to determine the probability of a species being present at a given site while accounting for imperfect detection. The survey data underlying these models often include information on several predictors that could potentially characterize habitat suitability and species detectability. Because these variables might not all be relevant, model selection techniques are necessary in this context. In practice, model selection is performed using the Akaike Information Criterion (AIC), as few other alternatives are available. This paper builds an objective Bayesian variable selection framework for occupancy models through the intrinsic prior methodology. The procedure incorporates priors on the model space that account for test multiplicity and respect the polynomial hierarchy of the predictors when higher-order terms are considered. The methodology is implemented using a stochastic search algorithm that is able to thoroughly explore large spaces of occupancy models. The proposed strategy is entirely automatic and provides control of false positives without sacrificing the discovery of truly meaningful covariates. The performance of the method is evaluated and compared to AIC through a simulation study. The method is illustrated on two datasets previously studied in the literature.

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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