This paper presents a survey of system model simplification theory.
本文对系统模型的简化理论进行评述。
For the static model, the technology has achieved a very good model simplification.
对于静态模型，现有技术已经很好的实现了模型简化。
The first phase is simplification, which transforms the model into a simpler version.
第一个阶段是简化过程，它负责将模型转化为一个简化的版本。
With simplification, this model can also be applied to indoor scenario.
经过简化，该模型还可以应用到室内场景。
With reasonable simplification on boundary condition, a realistic model is set up.
本文还对边界条件作了合理的简化，使整个模型较好地反映实际情况。
VAR model on maintenance cost is put forward according to the theory of simplification.
依据约化理论，建立了维修费用的VAR模型。
VAR model on maintenance cost is put forward according to the theory of simplification.
依据约化理论，建立了维修费用的VAR模型。
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