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基于四因素的公路网三点结构优化方法

, PP. 89-96

Keywords: 交通工程,公路网,四因素,优化方法,虚拟节点,粒子群算法

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Abstract:

?为提高公路网对经济社会发展的适应性,针对公路网布局优化问题,从公路网系统功能和经济社会发展角度出发,以建设成本、土地占用机会成本、运输成本、公路使用效率四因素为决策变量,构建公路网综合评价模型。在此基础上,以公路网三点典型结构为支点,提出添加虚拟节点的优化方法,并引入粒子群算法对优化模型进行求解。最后,以关中、陕南地区公路网优化为例,将四因素优化方法的优化效果同传统优化方法作对比分析。研究结果表明:四因素公路网综合评价模型具有良好的评价功能,且评价方法灵活、贴近实际;在三点典型结构中添加虚拟节点的优化方法可行且有效;同传统优化方法相比,所提出的方法能兼顾解决交通拥堵问题和非合理性畅通问题,优化效果显著。

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