【作者】 鲁晓春；

【导师】 詹荷生；

【作者基本信息】 北京交通大学 ， 管理科学与工程， 2008， 博士

【摘要】 物流系统的建模与分析是国内外学者研究的热点问题,对物流和供应链系统建模研究的理论和方法很多,本论文应用前人提出的Petri网基础理论,比较全面地建立了可在计算机上进行模拟验证的物流系统模型,论文的模型涵盖了物流系统的典型结构模型、逻辑关系模型、企业内部物流模型、供应链模型,这些模型层次由低到高,基本包括了物流管理中的常见模型。论文按照Petri网理论将物流系统分解为串联、并联、循环、选择,以及“与”、“或”、“异或”等基本结构,在此基础上建立了物流系统的库存控制、仓储物流、以及JIT系统的着色Petri网模型,并对模型进行了模拟计算,分析模型的特性。论文在以上模型的基础上,采用层次建模方法,构建了供应链着色Petri网模型,并以北京2008年奥运会为例,构建了具有计划供应与订货点订货的供应链模型,论文从实际需求的影响、采购周期和计划供应提前期三个方面对奥运供应链模型进行了分析。论文创新点如下:1)对物流系统的串联、并联、循环、选择结构和“与”、“或”、“异或”逻辑关系建立了Petri网模型,对前人的工作进行了验证和补充完善;2)构建了库存控制、仓储物流着色Petri网模型,并以企业实例数据对库存控制模型进行了模拟仿真,论文对非正态分布需求下安全库存与缺货率的关系、以及仓储作业评价指标进行了分析;3)构建了JIT系统着色Petri网模型,对订货时间间隔与供货频率进行了模拟分析,提出只有当客户订货时间间隔大于等于采购供货频率时,JIT系统才能表现出即时响应;4)综合构建了供应链着色Petri网模型,并对供应链的鞭子效应进行了模拟,提出以采用平均客户响应速度来衡量供应链响应速度比较合理;5)以北京2008年奥运会为例,构建了具有计划供应与订货点订货的奥运供应链模型,经过模拟分析发现,当计划供应提前期与采购周期相同时,供应链的库存量最小,响应速度最快,此时,供应链处于最佳状态。本论文共有图152幅,表70个,参考文献162篇。更多还原

【Abstract】 The Logistics system modeling and analysis is the hot research field in the world. There are a lot of theories on logistics and supply chain. In this thesis the timed colored Petri nets is used to build logistics models. These models could be running on the computer, and they are covered from the logistics typical structure model, logic model, to the enterprise’s internal model and supply chain model. These models are from low level to high level. The normal models in logistics management are included.The Petri nets model of "AND" , "OR", "XOR" and sequence, parallel, cycle, choice basic structure model are mentioned in this thesis. After that, the inventory control, warehouse operation and JIT system Petri nets model is also built. All the models are calculated by simulation, and the results are analyzed. The model’s properties are also discussed.Synthesis these models, a supply chain model of Timed Colored Petri net is put forward. It is a hierarchy model. In this model, the item is expressed by colored variable. It can describe different kind items. So the Supply Chain model can be applicability to many cases.In This thesis the 2008 Beijing Olympic Games is studied. The Beijing Olympic Games Supply Chain Petri nets model is built. The feature of Olympic Games supply chain is that the inventory is controlled by the supply planning, at the same time, the reorder point inventory control must be considered. The thesis discussed the model on three aspects: the real demands, the purchase period and the supply lead time.Some research works are done in this thesis:1) The sequence, parallel, cycle, choice structure model and the logic model of "AND","OR", "XOR" are built sisterly. Former’s workers are confirmed and improved.2) The Inventory control, warehouse operation models are constructed. The inventory control model is corroborated by using a company’s data. On the simulation foundation, the relationship of safe inventory and the rate of out stock under the non-normal distribution demand, the evaluation index of warehouse operation are discussed in this thesis.3) JIT system colored Petri nets model is put forward. In the thesis, the relationship of order interval and supply frequency is analysis by simulation. It is found that when the order interval is greater than the supply frequency, the JIT system will appear supply immediately.4) The Supply Chain Colored Petri nets model is also built. The bull whip effect is confirmed by simulation. The average customer response speed can be used to evaluate the response speed of Supply Chain.5) The 2008 Beijing Olympic Games Supply Chain model is discussed at last. The model feature is the planning mixed with random demand. After simulation, get the conclusion that when the supply lead time is same as the purchase period, the inventory is lower, the response speed is faster, the Supply Chain is under best condition.This thesis includes 152 charts, 70 tables, and reference 162 papers.更多还原