The Norwegian company Omya Hustadmarmor supplies calcium carbonate slurry to European paper manufacturers from a single processing plant, using chemical tank ships of various sizes to transport its products. Transportation costs are lower for large ships than for small ships, but their use increases planning complexity and creates problems in production. In 2001, the company faced overwhelming ...

Ship and fleet operating efficiencies are multifaceted and interdependent. As such, efficiency management must involve an integrated solution that extends across the entire operation of the fleet. No single metric can be used to indicate success or failure of improving overall efficiency. Rather, a comparative analysis of multiple metrics is required. Furthermore, to be viable, efficiency manag...

This work considers the problem of planning how a fleet shared electric vehicles is charged and used for serving set reservations. While exact approaches can be to efficiently solve small medium-sized instances this problem, heuristic have been demonstrated superior in larger instances. The present proposes large neighborhood search approach solving which employs mixed integer linear programmin...

A new energy ship is being developed to address shortages and greenhouse gas emissions. New ships feature low operational costs zero This study discusses the characteristics development of solar-powered ships, wind-powered fuel cell-powered hybrid ships. Three important technologies are used for power system ship: new-energy spatio-temporal prediction, scheduling, Digital Twin (DT). Research sh...

In order to systematically study the carbon emission reduction path suitable for China's inland river ships, this paper analyzes actual situation of ships ' operation scale, fleet structure, fuel consumption, etc., and combines development domestic foreign technologies ship's own operating characteristics. Carbon technology paths have been proposed in paper, which includes different tonnage cla...

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Vehicle Routing Problem (VRP) is a key element of many logistic systems which involve routing and scheduling of vehicles from a depot to a set of customers node. This is a combinatorial optimization problem with the objective to find an optimal set of routes used by a fleet of vehicles to serve a set of customers It is required that these vehicles return to the depot after s erving customers’ d...