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arXiv 1702.03597stat.MEq-bio.QM
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使用具有分层结构的隐马尔可夫模型对动物运动和一般行为数据进行多尺度建模

Multi-scale modeling of animal movement and general behavior data using hidden Markov models with hierarchical structures

Vianey Leos-Barajas, Eric Gangloff, Timo Adam, Roland Langrock, Floris M. van Beest, Jacob Nabe-Nielsen, Juan M. Morales

摘要:

隐马尔可夫模型(Hidden Markov Models,简称HMM)通常用于对动物运动数据进行建模并推断动物行为的各个方面。HMM假设来自观测的时间序列的每个数据点源于$N$可能的状态之一。这些状态与行为模式之间的联系是松散的,行为模式在观察的时间分辨率上表现出来。然而,由于标签技术的进步,可以以越来越精细的时间分辨率收集数据。然而,在时间尺度上的推断比收集数据的时间尺度粗糙,并且对应于更大规模的行为过程,尚未通过Hynthology回答。我们包括额外的层次结构的基本HMM框架,以纳入多个马尔可夫链在不同的时间尺度。分层结构的HSPINESS允许在多个时间尺度上进行行为推断,也可以作为避免粗化数据的一种手段。我们提出的框架是第一个同时在多个时间尺度上模拟动物行为的框架之一,为动物运动建模领域开辟了新的可能性。我们说明了应用分层结构的障碍,在两个真实的数据例子:(一)垂直运动的港口江豚在现场观察到的,和(二)束带蛇运动数据收集的一部分,试验设计。

英文摘要:

Hidden Markov models (HMMs) are commonly used to model animal movement data and infer aspects of animal behavior. An HMM assumes that each data point from a time series of observations stems from one of $N$ possible states. The states are loosely connected to behavioral modes that manifest themselves at the temporal resolution at which observations are made. However, due to advances in tag technology, data can be collected at increasingly fine temporal resolutions. Yet, inferences at time scales cruder than those at which data are collected, and which correspond to larger-scale behavioral processes, are not yet answered via HMMs. We include additional hierarchical structures to the basic HMM framework in order to incorporate multiple Markov chains at various time scales. The hierarchically structured HMMs allow for behavioral inferences at multiple time scales and can also serve as a means to avoid coarsening data. Our proposed framework is one of the first that models animal behavior simultaneously at multiple time scales, opening new possibilities in the area of animal movement modeling. We illustrate the application of hierarchically structured HMMs in two real-data examples: (i) vertical movements of harbor porpoises observed in the field, and (ii) garter snake movement data collected as part of an experimental design.

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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