Model predictive control (MPC) has been successfully applied to many transportation systems. For the control of overhead cranes, existing MPC approaches mainly focus on improving the regulation performance, such as tracking error or steady-state error. In this paper, energy efficiency as well as safety is newly considered in our proposed MPC approach. Based on the system model designed, the MPC...

In this paper we discuss the question of growth of testing efficiency during non-operational testing. "Learning" is said to occur if there is an improvement in the efficiency of testing during a testing phase. Our work indicates that in practice very little actual "learning" may take place during non-operational testing, particularly if test duration and testsuite size is subject to a priori co...

This paper proposes an extended data envelopment analysis (DEA) model for deriving eco-efficiency. In order to derive eco-efficiency, the proposed model utilizes the concepts of operational efficiency and environmental efficiency. Since DEA can separately measure operational efficiency and environmental efficiency, the treatment for constructing the unified indicator is required to ultimately e...

The Northeast Asia is emerging as the third hub of world economy next to EU and NAFTA. Neighboring countries in the region enter into keen competition to take the lead in global supply chain network. This competition is accelerated by the fast growing Chinese economy. Under these circumstances, it is necessary for container ports not only to extend the facilities but also to improve the operati...