基于出行方式选择的运输通道客运结构的协调研究

The Collaboration of Passenger Transport Structure for Transportation Corridor based on Mode Choice

针对区域综合运输通道客运交通供给和需求量大,出行方式多,各出行方式竞争激烈的特点.为了避免各出行方式之间存在恶性竞争,扰乱运输市场的正常秩序,建立了区域综合运输通道协同的多目标非线性规划数学模型.模型建立在出行者对交通方式的选择遵守效用极大化原理的基础上,系统目标为各出行方式的供给量与需量相适应.采用模糊折中算法将多目标转化为单目标,同时采用广义牛顿法对非线性规划问题进行求解,为了避免求得的解为局部最优解,提出了随机从不同的初始点进行寻优,尔后对各个结果进行比较,从中选出较优者作为全局最优解.该方法极大的提高了所求解为全局最优解的可靠性.最后通过算例证明了模型的正确性和可行性.

Regional comprehensive corridor takes on the characteristics of heavy transport demand and supply and many travel modes; meanwhile, competition is severe among different travel modes. In order to avoid vicious competition among different travel modes so that transportation market is disturbed, multi-objective and nonlinear programming model is built up, which is based on the maximization of unity of traveler. The objective of model is mutual adaptation of transport demand volume and supply volume. Multi-objective is transferred into single objective by multi-objective fuzzy programming method. At the same time Newton arithmetic is employed to solve nonlinear problem. For the sake of avoiding obtaining local optimal solution, different and stochastic original solutions are adopted to find the local optimal solution, the optimal of which is took as the global optimal solution. The solution is improved to a large extent by this way. At last, a numeric example demonstrates the validity and feasibility.