...层次可分为单级分销网络模型和多级分销网络模型；按处理数据类型 的不同可划分为连续近似模型（Continuous Approximation Model，CAM）和离散模型 （DiscreteModels，DM）。
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本文主要讨论沟道的经典近似，引入了连续模型和静态平均势概念。
In this paper the channeling classical approximation is described. The continuous model and the concept of the static average potential are introduced.
在离散—连续组合模型中包含第一溶剂化层的溶剂分子已经可以较为近似地描述出溶剂化的主要作用。
The combined discrete-continuum model, which including the solvent molecules in the first solvation shell, is enough to simulate main effects.
采用双层规划模型描述弹性需求条件下的连续平衡网络设计问题，设计了近似解的启发式算法。
A bilevel programming model and heuristic solution algorithm is proposed to model the continuous equilibrium network design problem with elastic demand.
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