城市物流風(fēng)險(參考版)
2025-01-08 10:13本頁面
【正文】 Kyoto University Global COE “Human Security Engineering”Incorporating risks in city logisticsProfessor Eiichi TaniguchiKyoto University1Kyoto University Global COE “Human Security Engineering”O(jiān)utline1 Concepts of city logistics2 Class of risks related to city logistics3 Vehicle routing and scheduling problems with time windows (VRPTW)4 VRPTW with uncertainty of travel times5 Multiagent simulation with ambiguity6 ConclusionKyoto University Global COE “Human Security Engineering” Source: Annual Statistical Report on Automobile Transport: Information and Research Department, Policy Bureau, Ministry of Land, Infrastructure and Transport Truck loading efficiency3Kyoto University Global COE “Human Security Engineering”? City logistics is the process for totally optimising the logistics and transport activities by private panies with the support of advanced information systems in urban areas considering the traffic environment, its congestion, safety and energy savings within the framework of a market economy (Taniguchi et al. 2023)101 Concepts of city logisticsKyoto University Global COE “Human Security Engineering”5Structure of visions for city logisticsResilienceKyoto University Global COE “Human Security Engineering”2 Class of risks related to city logisticsCongestionCrashHazardous material transportFloodEarthquakeBush fireSnowfallFrequencyplexity Uncertainty AmbiguityDayto dayRareVRPTW VRPTWD VRPTWP Multiagent model3 Vehicle routing and scheduling problems with time windows (VRPTW)2 Depotk = 1, 2, … K671083954Vehicle Routing and scheduling Problems with Time Windows (VRPTW) is defined as to find the minimum cost routes for k vehicles to service all the clients.Constraints: A vehicle can not serve more clients than its capacity. Delivery at each client must be within some predefined time windows. [ 2 – 3 pm][ 4 – 7 pm][ 7 – 8 pm][ 10 – 12 am][ 1 – 5 pm][ 10 – 11 am][ 10 – 11 am][6 – 7 pm][ 3 – 4 pm]7Kyoto University Global COE “Human Security Engineering”VRPTW VariantsHard Time WindowsDelivery is not possible outside the specified Time Windows (VRPHTW). Soft Time WindowsDelivery is possible outside the specified Time Windows with penalties (VRPSTW). TimePenalty cost[ ]ai bi∞ ∞Hard Time Windows (HTW)In exact solution techniques, waiting is allowed at no costTime[ ] ]ai bi bi’Penalty costSimilarly allowing waiting without cost in Soft Time Windows results in:Semi Soft Time Windows (SSTW)Kyoto University Global COE “Human Security Engineering”O(jiān)bjectivesCost of DeliveryWaiting TimeEnvironment ImpactsNOxCO2 SPMDevelop an exact solution approach for VRPSSTW Using exact solution techniques for both VRPHTW and VRPSSTW, to pare their relative characteristics with respect to Using some practical logistics problems based on real road work so that above mentioned parameters can be calculated on the basis of actual traffic characteristics : Travel time, Travel SpeedA detailed link based environmental parison identifying emission intensities on each link produced by the VRPHTW and V
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