In response to the needs of landscape construction in the new countryside of west China,this paper takes Sanyi Village in Guanzhong area for example,from the combined perspective of modern landscape and traditional lo...In response to the needs of landscape construction in the new countryside of west China,this paper takes Sanyi Village in Guanzhong area for example,from the combined perspective of modern landscape and traditional local culture,explores micro-evolution laws of rural courtyard landscapes in Guanzhong Area.By finding out the reasonable aspects as land use,layout and decoration,and the unreasonable aspects as material,texture and green cultivation,in the landscape micro-evolution of rural settlement courtyard,it tries to guide the landscape planning,provide some brief construction methods,focus on the"step by step"safeguarding and introductory development mode,explore tangible and intangible elements of landscape culture in rural settlements,and play the potentials of rural dwellings in courtyard landscape construction,so as to solve the conflict between conservation and development in rural settlements.展开更多
With the rapid development of low-altitude economy and unmanned aerial vehicles (UAVs) deployment technology, aerial-ground collaborative delivery (AGCD) is emerging as a novel mode of last-mile delivery, where the ve...With the rapid development of low-altitude economy and unmanned aerial vehicles (UAVs) deployment technology, aerial-ground collaborative delivery (AGCD) is emerging as a novel mode of last-mile delivery, where the vehicle and its onboard UAVs are utilized efficiently. Vehicles not only provide delivery services to customers but also function as mobile ware-houses and launch/recovery platforms for UAVs. This paper addresses the vehicle routing problem with UAVs considering time window and UAV multi-delivery (VRPU-TW&MD). A mixed integer linear programming (MILP) model is developed to mini-mize delivery costs while incorporating constraints related to UAV energy consumption. Subsequently, a micro-evolution aug-mented large neighborhood search (MEALNS) algorithm incor-porating adaptive large neighborhood search (ALNS) and micro-evolution mechanism is proposed. Numerical experiments demonstrate the effectiveness of both the model and algorithm in solving the VRPU-TW&MD. The impact of key parameters on delivery performance is explored by sensitivity analysis.展开更多
基金Supported by Program of Shannxi Provincial Department of Education(09JK136)~~
文摘In response to the needs of landscape construction in the new countryside of west China,this paper takes Sanyi Village in Guanzhong area for example,from the combined perspective of modern landscape and traditional local culture,explores micro-evolution laws of rural courtyard landscapes in Guanzhong Area.By finding out the reasonable aspects as land use,layout and decoration,and the unreasonable aspects as material,texture and green cultivation,in the landscape micro-evolution of rural settlement courtyard,it tries to guide the landscape planning,provide some brief construction methods,focus on the"step by step"safeguarding and introductory development mode,explore tangible and intangible elements of landscape culture in rural settlements,and play the potentials of rural dwellings in courtyard landscape construction,so as to solve the conflict between conservation and development in rural settlements.
基金supported by the Fundamental Research Funds for the Central Universities(2024JBZX038)the National Natural Science Foundation of China(62076023).
文摘With the rapid development of low-altitude economy and unmanned aerial vehicles (UAVs) deployment technology, aerial-ground collaborative delivery (AGCD) is emerging as a novel mode of last-mile delivery, where the vehicle and its onboard UAVs are utilized efficiently. Vehicles not only provide delivery services to customers but also function as mobile ware-houses and launch/recovery platforms for UAVs. This paper addresses the vehicle routing problem with UAVs considering time window and UAV multi-delivery (VRPU-TW&MD). A mixed integer linear programming (MILP) model is developed to mini-mize delivery costs while incorporating constraints related to UAV energy consumption. Subsequently, a micro-evolution aug-mented large neighborhood search (MEALNS) algorithm incor-porating adaptive large neighborhood search (ALNS) and micro-evolution mechanism is proposed. Numerical experiments demonstrate the effectiveness of both the model and algorithm in solving the VRPU-TW&MD. The impact of key parameters on delivery performance is explored by sensitivity analysis.
