As the number of motor vehicles increases rapidly in many populated countries, t he shortage of parking space has become a difficult problem to all cities around the world. The contradiction between the shortage of pa...As the number of motor vehicles increases rapidly in many populated countries, t he shortage of parking space has become a difficult problem to all cities around the world. The contradiction between the shortage of parking space and the incr easing number of motor vehicles is still growing in the recent years. The utiliz ation of various kinds of mechanical parking facilities is an effective solution to this problem. How to organize a reasonable logistics system in a mechanical parking lot so that as many parking positions as possible can be constructed wit hin a limited space at the lowest cost is a long challenging subject for enginee ring designers. Obviously, it is of great value to approach this subject theoret ically and systematically. Based on the study of the development of different me chanical parking facilities, the features, definitions, classifications and eval uation indexes of mechanical parking logistics systems are discussed in this pap er. The static and dynamic characteristics of different systems are also analyze d.展开更多
This paper firstly analyzed the operation model,market positioning,market demand forecast as well as market competition and challenges,park site selection,and transportation conditions for construction of the Cold-Cha...This paper firstly analyzed the operation model,market positioning,market demand forecast as well as market competition and challenges,park site selection,and transportation conditions for construction of the Cold-Chain Logistics Park of Agricultural Products in Sanshui.Then,it presented the overall planning scheme for construction of the Cold-Chain Logistics Park of Agricultural Products from a progressive two-stage perspective of overall planning and stage-by-stage implementation.The first stage mainly performs the function as a transaction platform of agricultural products and meanwhile provides customers with agricultural products storage and inspection services.The second stage adds value-added services such as distribution processing,modified atmosphere storage,freezing and refrigeration,market price information distribution,E-commerce of agricultural products and personalized services.It is expected to provide references and suggestions for the construction of the Cold-Chain Logistics Park of Agricultural Products.展开更多
Based on the development of modem logistics park in China, and with the thought of minimizing carbon emission, the development of Logistics Park was analyzed and the necessity of developing low carbon Logistics Park w...Based on the development of modem logistics park in China, and with the thought of minimizing carbon emission, the development of Logistics Park was analyzed and the necessity of developing low carbon Logistics Park was proposed. Low carbon emission in Logistics Park was planned. In the end, operation and implementation strategies of low carbon parks were put forward so as to create favorable environment for the re- alization of low carbon emission in Logistics Park.展开更多
针对钢铁物流园堆场内由于区储位分配不合理导致的车辆长时间排队等货、堆区作业堵塞等问题,提出以优化出入场时间和均衡园区堆场总作业量的多目标优化模型。模型中综合考虑需求量和受订频次因素对货位分配位置的影响,构建了以缩短运输...针对钢铁物流园堆场内由于区储位分配不合理导致的车辆长时间排队等货、堆区作业堵塞等问题,提出以优化出入场时间和均衡园区堆场总作业量的多目标优化模型。模型中综合考虑需求量和受订频次因素对货位分配位置的影响,构建了以缩短运输距离的单区货位布局优化子目标,同时为避免作业量过度集中,减少装卸作业堵塞,针对全堆场构建了基于出入库频率划分的货物堆场内作业均衡子目标。为高效求解该多目标模型,针对NSGA-II算法存在的Pareto前沿分布不均匀及局部拥挤区域的分布性优化不佳,提出了自适应分层保留和区间种群扩张的改进策略,构建了改进多目标优化算法(Hierarchical Retention and Interval Population Expansion NSGA-II,HRIPE-NSGA-II)。基于实际案例进行了模型和算法验证试验,结果表明该模型在HRIPE-NSGA-II求解下能够获得比对比算法更优的解方案,缩短车辆在园区内作业停留时间,平衡各区作业量,提高堆场运作效率。展开更多
文摘As the number of motor vehicles increases rapidly in many populated countries, t he shortage of parking space has become a difficult problem to all cities around the world. The contradiction between the shortage of parking space and the incr easing number of motor vehicles is still growing in the recent years. The utiliz ation of various kinds of mechanical parking facilities is an effective solution to this problem. How to organize a reasonable logistics system in a mechanical parking lot so that as many parking positions as possible can be constructed wit hin a limited space at the lowest cost is a long challenging subject for enginee ring designers. Obviously, it is of great value to approach this subject theoret ically and systematically. Based on the study of the development of different me chanical parking facilities, the features, definitions, classifications and eval uation indexes of mechanical parking logistics systems are discussed in this pap er. The static and dynamic characteristics of different systems are also analyze d.
文摘This paper firstly analyzed the operation model,market positioning,market demand forecast as well as market competition and challenges,park site selection,and transportation conditions for construction of the Cold-Chain Logistics Park of Agricultural Products in Sanshui.Then,it presented the overall planning scheme for construction of the Cold-Chain Logistics Park of Agricultural Products from a progressive two-stage perspective of overall planning and stage-by-stage implementation.The first stage mainly performs the function as a transaction platform of agricultural products and meanwhile provides customers with agricultural products storage and inspection services.The second stage adds value-added services such as distribution processing,modified atmosphere storage,freezing and refrigeration,market price information distribution,E-commerce of agricultural products and personalized services.It is expected to provide references and suggestions for the construction of the Cold-Chain Logistics Park of Agricultural Products.
基金Supported by Henan Science and Technology Program(102400440008)Henan Government Decision-making Research IFB Program (B667) .
文摘Based on the development of modem logistics park in China, and with the thought of minimizing carbon emission, the development of Logistics Park was analyzed and the necessity of developing low carbon Logistics Park was proposed. Low carbon emission in Logistics Park was planned. In the end, operation and implementation strategies of low carbon parks were put forward so as to create favorable environment for the re- alization of low carbon emission in Logistics Park.
文摘针对钢铁物流园堆场内由于区储位分配不合理导致的车辆长时间排队等货、堆区作业堵塞等问题,提出以优化出入场时间和均衡园区堆场总作业量的多目标优化模型。模型中综合考虑需求量和受订频次因素对货位分配位置的影响,构建了以缩短运输距离的单区货位布局优化子目标,同时为避免作业量过度集中,减少装卸作业堵塞,针对全堆场构建了基于出入库频率划分的货物堆场内作业均衡子目标。为高效求解该多目标模型,针对NSGA-II算法存在的Pareto前沿分布不均匀及局部拥挤区域的分布性优化不佳,提出了自适应分层保留和区间种群扩张的改进策略,构建了改进多目标优化算法(Hierarchical Retention and Interval Population Expansion NSGA-II,HRIPE-NSGA-II)。基于实际案例进行了模型和算法验证试验,结果表明该模型在HRIPE-NSGA-II求解下能够获得比对比算法更优的解方案,缩短车辆在园区内作业停留时间,平衡各区作业量,提高堆场运作效率。
