“Architecture starts when you carefully put two bricks together.There it begins.”—Ludwig Mies van der Rohe As bonding is fundamental to architectural integrity,bonding in chemistry is central to molecular architect...“Architecture starts when you carefully put two bricks together.There it begins.”—Ludwig Mies van der Rohe As bonding is fundamental to architectural integrity,bonding in chemistry is central to molecular architectonics,operating across multiple length and energy scales under restrictions of orbital symmetry,shape complementarity,as well as interactional dynamics and directionality,thereby giving rise to vast structural diversity(Figure 1a).展开更多
Purpose–Traffic density is one of the most important parameters to consider in the traffic operationfield.Owing to limited data sources,traditional methods cannot extract traffic density directly.In the vehicular ad hoc ...Purpose–Traffic density is one of the most important parameters to consider in the traffic operationfield.Owing to limited data sources,traditional methods cannot extract traffic density directly.In the vehicular ad hoc network(VANET)environment,the vehicle-to-vehicle(V2V)and vehicle-to-infrastructure(V2I)interaction technologies create better conditions for collecting the whole time-space and refined traffic data,which provides a new approach to solving this problem.Design/methodology/approach–On that basis,a real-time traffic density extraction method has been proposed,including lane density,segment density and network density.Meanwhile,using SUMO and OMNet11 as traffic simulator and network simulator,respectively,the Veins framework as middleware and the two-way coupling VANET simulation platform was constructed.Findings–Based on the simulation platform,a simulated intersection in Shanghai was developed to investigate the adaptability of the model.Originality/value–Most research studies use separate simulation methods,importing trace data obtained by using from the simulation software to the communication simulation software.In this paper,the tight coupling simulation method is applied.Using real-time data and history data,the research focuses on the establishment and validation of the traffic density extraction model.展开更多
文摘“Architecture starts when you carefully put two bricks together.There it begins.”—Ludwig Mies van der Rohe As bonding is fundamental to architectural integrity,bonding in chemistry is central to molecular architectonics,operating across multiple length and energy scales under restrictions of orbital symmetry,shape complementarity,as well as interactional dynamics and directionality,thereby giving rise to vast structural diversity(Figure 1a).
文摘Purpose–Traffic density is one of the most important parameters to consider in the traffic operationfield.Owing to limited data sources,traditional methods cannot extract traffic density directly.In the vehicular ad hoc network(VANET)environment,the vehicle-to-vehicle(V2V)and vehicle-to-infrastructure(V2I)interaction technologies create better conditions for collecting the whole time-space and refined traffic data,which provides a new approach to solving this problem.Design/methodology/approach–On that basis,a real-time traffic density extraction method has been proposed,including lane density,segment density and network density.Meanwhile,using SUMO and OMNet11 as traffic simulator and network simulator,respectively,the Veins framework as middleware and the two-way coupling VANET simulation platform was constructed.Findings–Based on the simulation platform,a simulated intersection in Shanghai was developed to investigate the adaptability of the model.Originality/value–Most research studies use separate simulation methods,importing trace data obtained by using from the simulation software to the communication simulation software.In this paper,the tight coupling simulation method is applied.Using real-time data and history data,the research focuses on the establishment and validation of the traffic density extraction model.
