Modeling and dynamic simulation of propulsion plant for ocean-going fishing vessel

Considering the complexity of propulsion plant and the multiple operating conditions for fishing vessel, the modeling and simulation of ship engine propeller and net for the ocean-going fishing vessel are investigated. According to the matching theory of ship engine propeller and net, the relationships of them are analyzed. Furthermore, the motion balance equation and dynamic equilibrium equation are built for the translation system and rotation system of fishing vessel which can indicate the changing trends of propeller rotational speed or ship speed and propeller torque of thrust. Based on this, by setting up the simulation models of various subsystems, the simulation model of propulsion plant are built for the ocean-going fishing vessel. A trawler is considered to perform simulation tests in which start-up condition, normal navigation condition and trawling condition are taken into account. The simulation results illustrate the correctness and validity of modeling and simulation for propulsion plant system.

"Agent-based simulation of restaurant deliveries facilitating cargo-bikes and urban consolidation"

"Last-mile distribution in urban areas is challenged by congestion and restriction for motorized traffic. To support operations, this work investigate the impact of operating urban consolidation points and facilitating cargo-bikes for urban last-mile distribution. Motivated by sample setting originating from the food delivery industry, a decision support system combining agentbased simulation with heuristic optimization procedure is developed. It considers a logistics provider who performs the last-mile delivery for multiple competing restaurants in an urban area. Therefore, both demand and the availability of cargo-bikes, which are operated by freelancers, are subject to randomness. Computational experiments investigate the impact of the available amount of cargo-bike drivers as well as the number of operated consolidation points, highlighting the importance of facilitating simulation models to support operations in highly dynamic and uncertain settings."