The innovative achievements of this dissertation can be summed up as the followings : four-step method to predict the amount of regional transportation information, network layout models, and research on optimization of network layout. 文中提出的区域交通信息量四阶段法预测、网络布局模式及网络布局优化研究均为创新性成果。
Author transformed network flow transportation time and transportation cost from constraints to objectives, and studied multi-objective optimization problem upon stochastic flow network. 文中将网络流传输时间和成本从约束条件转化为整体优化目标,并结合网络流可靠性这一主要目标,研究随机型流量网络上网络流的多目标优化问题。
In addition, to encourage more residents travel by public transportation, the optimization model of urban traffic structure is established under the restrictive conditions of transport energy consumption, network resources, environment capacity and other constraints. 为鼓励城市更多居民采用公共交通方式出行,建立了在交通能源、路网资源、环境容量等限制条件下,以城市交通系统交通效率最优和居民出行交通成本最少为目标函数的城市交通结构优化模型。
Meanwhile, the paper take comprehensive consideration of the importance of transportation lines and traffic-stations in Tianjin urban public transportation. And the paper proposes two kinds of improved and optimization schemes, with great capacity, fast and efficient modern urban transit network for the target. 同时,综合考虑天津市公交网络中站点和线路的重要程度,以大容量、快速度、高效率的现代化城市公交网络为目标,提出两种优化改进的方案&快速公交和公交主干线。
Through analyzing the theories and experience about transportation network, in this paper, the main researches are on the network structure, optimization model and a new method of laying public transportation network. 为此,在参考国内外有关公交线网规划文献基础上,本文对线网结构进行了分析,建立了线网优化模型,并提出了一整套基于优化模型的线网方案构建方法。