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A general approach to non-Markovian compartmental models.

机译:非马氏间隔模型的一般方法。

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摘要

Stochastic compartmental models are usually based on continuous-time Markov processes. Markovian models assume that the compartments have exponential retention times, which is known not to hold in certain applications such as calcium clearance from bone. A number of semi-Markov models with restricted families of retention times have been proposed recently. This paper presents a general, tractable procedure for determining from suitable data the estimated retention time distributions for assumed non-Markovian phenomenological models. The procedure is based on using phase-type distributions. These distributions can describe the long tails observed in calcium clearance data, and they frequently lead to complex eigenvalues that are often overlooked in practice. The procedure is illustrated on several proposed models for describing a particular data set.
机译:随机区室模型通常基于连续时间马尔可夫过程。马尔可夫模型假设隔室具有指数保留时间,众所周知,在某些应用中(例如从骨骼清除钙),该保留时间不成立。最近已经提出了许多具有有限保留时间族的半马尔可夫模型。本文提出了一种通用的,易于处理的程序,用于从合适的数据中确定假定的非马尔可夫现象学模型的估计保留时间分布。该过程基于使用相位类型分布。这些分布可以描述在钙清除率数据中观察到的长尾巴,并且它们经常导致复杂的特征值,而这些特征值在实践中经常被忽略。在几个用于描述特定数据集的提议模型上说明了该过程。

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