这种有害的态度的原因来自对一个模型与一项理论的性质的误解。
The mischief is caused by the misunderstanding of the nature of a model and a theory.
根据模糊系统的逼近性质，非线性系统可以表示为线性参数化模型加上一建模误差项。
Based on the approximation property of fuzzy systems, a nonlinear system can be expressed as the form of linear parametric model and a modelling error term.
物流配送是一项复杂的系统工程，其中许多优化问题所建立的模型和算法都很复杂，都具有NP难性质。
Many models and algorithms established to optimize problems are complex and most have the nature of NP.
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