Thirdly, research rural logistics network optimization models and algorithms.

再次，研究农村物流网络优化的模型和算法。

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To express integrated optimization of multiple hubs location and mixed network design, a bi-level programming model was introduced for mathematical models.

为了描述多枢纽选址与混合网络设计综合优化问题，引入了双层规划模型建立数学模型。

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In this paper, several artificial neural network based models of solving inverse eigenvalue problem and their characters are studied. These models are direct, indirect and optimization inverse models.

研究了特征值反问题求解的几种神经网络模型：直接逆模型，间接逆模型，优化方法模型，指出了各种方法的应用范围。

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