Scheduling problems in the forest industry have received significant attention in the recent years and have contributed many challenging applications for optimization technologies. This paper proposes a solution method based on constraint programming and mathematical programming for a log-truck scheduling problem. The problem consists of scheduling the transportation of logs between forest area...

Abstract Commercial shipping is the dominant source of low-frequency noise in ocean. It has been shown that radiated by an individual vessel depends upon vessel’s speed. This study quantified reduction levels (SLs) and sound exposure (SELs) for ships participating two variations a speed (VSR) program. SLs SELs program between 2014 2017 were statistically lower than non-participating ( p < 0....

Environmental issues and consumer concerns have paved the way for governments to legislate and help usher into operation alternativefueled vehicles and pertinent infrastructures. In the last decade, batterypowered electric vehicles have been introduced and the service industry has followed suit and deployed such trucks in their distribution networks. However, electric vehicles do impose limitat...

We consider the multi-objective scheduling problem for the periodic maintenance of a fleet of fighter aircraft. We describe a simulation-optimization approach based on discrete-event simulation [2] and simulated annealing [1] for the generation of the non-dominated solutions of the problem. In addition, we suggest the use of a multi-attribute decision analysis model [9] to support the maintenan...

A common problem faced by carriers in liner shipping is the design of their service network. Given a set of demand to be transported and a set of ports, a carrier wants to design service routes for his ships as efficiently as possible, using the underlying facilities. Furthermore, the profitability of the service routes designed depends on the paths chosen to ship the cargo. We present an integ...

The fleet assignment problem (FAP) assigns the type of airplane at each flight segment. Since airplane is an expensive resource, poor fleet assignment can cause a great increase in costs of airlines. There are so many consideration which should be tackled in formulation of a FAP problem, especially the parameters regarding to the airplanes. This paper presents a novel, mixed integer programing ...

Ships transport about 80 percent of world trade and transfer approximately three to five billion tons of ballast water internationally every year. Due to the likely presence of pollutants, the ballast water discharged by ships can have negative effects on aquatic ecosystems. This study was conducted on 10 ships that entered the Bushehr port to determine the effectiveness of the ballast water ex...

This paper introduces Global Fleet Station Mission Planner (GFSMP), an optimization tool to aid in mission planning and the scheduling of humanitarian assistance missions for the US Navy. GFSMP helps fleet staffs to examine how one naval ship, which was deployed for an extended period (e.g., six months), with embarked teams can best provide humanitarian assistance. We illustrate the application...

A mathematical model for dynamic fleet planning with multi routes and multi ship, which took the maximum total operation profits as its objective function, was built up according to the characteristics of the shipping company. The model had the following characteristics: Firstly in the model, the long-term fleet planning and short-term scheduling were combined. Secondly, the economic and techno...