This paper deals with the structure identification problem of complex system models.

本文给出了复杂系统模型结构辨识问题的基本假设和定义；

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In practice, one model is not always enough and a complex system may be represented by a range of models, from simple to complex.

在实践中，一个模型常常是不够的，复杂的系统可以用从简单到复杂的多个模型表示。

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Instead, Earth system scientists combine observations of the real world with complex computer models.

作为代替，地球系统科学家们将真实观测和复杂的电脑模型组合在一起。

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Its goal is to map the complex network of signalling reactions which cells use as an internal messaging system, and then feed this information into other computational models.

ECONOMIST: REPORTS: The heart of the matter | The