排队论在垃圾转运站设备优化配置中的应用

根据对垃圾收集运输过程随机动态特征的分析,提出了一种以排队论为基础的转运站设备配置方法。通过引入M/M/S排队模型,构建了垃圾转运站排队服务系统费用模型,以系统总费用最小来进行转运站压缩设备的配置,并以重庆市某垃圾转运站为例进行了实例分析。结果表明,与传统静态方法相比,采用排队论方法进行转运站设备配置,垃圾转运站系统的总费用可降低7.5%,垃圾收集车辆的平均逗留时间系数由0.16降为0.1,车辆排队长度系数由4.47降低为2.71,转运系统具有更好的经济性和抗风险能力,达到优化配置的目的。

Application of Queuing Theory in the Optimal Allocation of Equipment in Waste Transfer Station

Optimal allocation of equipment in waste transfer stations can make the transfer system more steady and economically.Traditional allocation of equipment in waste transfer stations is a static method.Based on the analysis upon stochastic dynamic characteristics in waste collection and transportation process,a method for equipment allocation on the basis of queuing theory is proposed.With the introduction of the M/M/S queuing model,a cost model of queuing system in transfer stations was formulated,which allocated compression equipment with the least total cost of system.The new model was applied to a large scale waste transfer station to be built in Chongqing as a practical example.The result shows that,compared with the traditional static method,the queuing method can reduce the total cost of transfer station system by 7.5%,the collection vehicles' average waiting time descends from 0.16 to 0.1,the vehicle queue length from 4.47 to 2.71 and also improving the anti-risk capacity of transfer systems.