考虑乘客需求特性的DRC公交运行周期优化

DRC bus operation cycle optimization corresponding to passenger demand characters

考虑乘客需求特征,构建了单车双周期运行模式下DRC运行周期的优化方法。首先刻画乘客需求特征,然后根据出行分布的不均匀性、乘客取消预订等构建乘客出行成本函数,并与运营商成本叠加形成总成本函数,以系统总成本最小为目标构建运行周期优化模型,并基于遗传算法设计求解算法。通过多组仿真试验表明,DRC最佳运行周期随接送乘客比例和取消预订乘客比例变化;取消预订乘客数越多,则周期越长;当乘客数一定时,运行周期越长,则总成本越大。

The optimization method of the running cycle is studied according to the charac- ters of passenger demand when the single-bus and double-cycle mode is adopted by DRC bus. Firstly, passenger demand characters are described by the six dimension array. Second- ly, the passenger utility function is rebuilt considering the uneven distribution of passengers and the cancel reservation and so on, and then the passenger and operator total cost function is built. The optimization model of the running cycle is set up where the passenger departure time window requirement, vehicle capacity, etc. are all considered as conditions while the minimum total cost is the target. The genetic algorithm is devised to obtain the best period. A set of experiment are carried out. From these experiments, the best DRC operating cycle changes with the proportion of passengers and cancellation of booking passengers, the more passengers cancel the reservations, the longer the cycle length. And under the same passen- ger number, the longer the total operating cycle length, the greater the total cost.