由于选址模型是NP问题，采用启发式算法进行求解。
Because the location model is an NP problem, we solve the problem with heuristic arithmetic.
城市物流中心选址模型的建立和模型的验证是本文重点讨论的内容；
The thesis emphasizes the establishment and the test of the city logistics center model.
以往的应急系统选址模型仅仅考虑在一个确定应急限制期下的选址问题。
Optimal location model in emergency systems often regards location problem of an given deadline.
引入BP神经网络，设计出了基于BP神经网络的大型超市选址分析模型。
BP neural network is employed to design a location analysis model for large-scale supermarkets.
引入BP神经网络，设计出了基于BP神经网络的大型超市选址分析模型。
BP neural network is employed to design a location analysis model for large-scale supermarkets.
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