Swanson G D
Department of Anesthesiology, University of Colorado Health Sciences Center, Denver 80262.
Med Sci Sports Exerc. 1990 Feb;22(1):80-7.
A model abstracts certain features of real systems, which are consistent with the purpose intended for the model. Therefore, models are classified with respect to intended purpose. A structural model predicts behavior based on a hypothetical physiological structure. An empirical model summarizes observed behavior. A functional model attempts to relate observed behavior to physiological structure. It differs from structural model since it includes only structural aspects that are essential for describing the system response. This model classification provides for the interaction among experimental data, underlying physiological hypotheses and experimental design. In this paper, we illustrate the utility of this modeling process for studying pulmonary gas exchange dynamic control processes during exercise. The modeling process is applied to the problem of estimating breath-by-breath gas exchange data, to the problem of selecting appropriate models for characterizing the response to dynamic work rate inputs, and finally to the problem of design of the dynamic aspects of the work rate input.
模型抽象出真实系统的某些特征，这些特征与模型预期的目的一致。因此，模型是根据预期目的进行分类的。结构模型基于假设的生理结构预测行为。经验模型总结观察到的行为。功能模型试图将观察到的行为与生理结构联系起来。它与结构模型不同，因为它只包括描述系统响应所必需的结构方面。这种模型分类考虑了实验数据、潜在生理假设和实验设计之间的相互作用。在本文中，我们阐述了这种建模过程在研究运动过程中肺气体交换动态控制过程方面的实用性。该建模过程应用于逐次呼吸气体交换数据估计问题、选择合适模型以表征对动态工作率输入的响应问题，以及最后工作率输入动态方面的设计问题。
