Open-sea ship-to-ship transfer operation is an alternative way to avoid port congestion. This process involves a relatively small vessel which transports containers between the harbour and a large cargo ship equipped with a container crane. However, the presence of disturbances and uncertainties caused by harsh open-sea conditions can produce an excessive sway to the hoisting ropes of the crane system.

This paper addresses the problem of nonlinear discrete-time flatness-based controller design for a Permanent Magnet-Excited Synchronous Motor (PMSM). To eliminate the static errors of the system state variables and consider the nonlinear characteristics of a PMSM, a cascaded flatnessbased control scheme is proposed. Simulation results are provided to illustrate the effectiveness of the proposed control structures, in terms of better performance.

In stevedoring operations, the ship-to-ship transfer of containers in open-sea is becoming an alternative way to avoid port congestion and subsequently can increase port efficiency. This process involves a large container ship or a barge, equipped with a crane, and a smaller vessel which transports containers between the ship and the harbour. However, the harsh open-sea conditions can produce exogenous disturbances to the crane system during the load transfer. Besides, the uncertainties and disturbances in the crane systemmay degrade the control performance.

The establishment of the ASEAN Economic Community (AEC) by the end of 2015 opens up opportunities for the development of the fledgling logistics industry in Vietnam, but also exerts enormous pressures on the operations of the logistics companies, which forces them to respond and innovate. One feasible option for the survival and thrive of the Vietnamese logistics enterprises under new challenges of integration is through the merger and acquisition (M&A) activities.

Bài báo trình bày phương pháp xác định các kích thước chủ yếu của tàu container hiện đại cỡ nhỏ trong giai đoạn thiết kế ban đầu, dựa trên phương án xếp thùng của tàu theo chiều dài, chiều rộng và chiều cao mạn tàu.

The fuel consumption in maritime transportation is a big fuel consumer. However, to use and to manage the fuel in maritime transportation field is still not proper to actual expect in many countries including Vietnam. The present fuel management on board ships is only based on the set fuel use norm of a country, but not on the actual operating conditions of ships. Therefore, such management method of fuel is not matched to the target of using efficiently and saving energy, but also creates good conditions for crewmember to pilfer the fuel for private profits.