A small, truck-type slewing crane with a grab was centrally mounted at the front of an 8-ton box-type tipping trailer. The crane and grab were operated by the hydraulic system of the tractor. Attempts to modify the control valves of the crane were not successful and it was concluded that the standard controls supplied for truck-type cranes were not suitable for this purpose. A standard double-a...

In this article we propose a heuristic algorithm to explore search space trees associated with instances of combinatorial optimization problems. The is based on Monte Carlo tree search, popular in game playing that used and represents the state-of-the-art for number games. Several enhancements are proposed make more suitable context. These exploit structure problem aim efficiently by pruning su...

Abstract Background In 2017, smaller container ports handled approximately 22% of total containerized cargo. Nowadays liner operators are calling on those with larger ships and demanding fast efficient turnaround the in port. This is possible only if berth has right capacities, working properly achieves a good productivity level. Methodology Productivity level does not depend quay crane capacit...

• The BAP and the Quay Cranes Assignment Problem is studied. A mixed integer linear programming model developed. An efficient construction heuristics are proposed. metaheuristic approach designed. Experimental results demonstrate effectiveness of proposal. Berth Allocation two decisive seaside operations planning problems in maritime terminals. Therefore, integrating these critical improving an...

<p><span lang="PT-BR">PT Jakarta International Container Terminal (JICT) is the largest container port in Indonesia. Currently, JICT capacity 2.5 million TEUs (Twenty-foot Equivalent Units) per year, it continues to strive improve international services and supported by adequate loading unloading equipment. The requirement establish common standards different types of equipment iden...

yard crane is an important resource in container terminals. efficient utilization of the yard crane significantly improves the productivity and the profitability of the container terminal. this paper presents a mixed integer programming model for the yard crane scheduling problem with non- interference constraint that is nphard in nature. in other words, one of the most important constraints in...

The stability of the quay wall incorporating large diameter cylinders is of great concern at the Yangshan Port, China, owing to severe marine environment. In this study, finite element analysis is carried out to evaluate the stability of a trial quay wall during construction. The single cylinder is examined in terms of turnover failure subjected to a five year design wave action. The case when ...

This work introduces a fuzzy optimization model, which solves in an integrated way the berth allocation problem (BAP) and quay crane (QCAP). The is solved for multiple quays, considering vessels’ imprecise arrival times. model optimizes use of quays. BAP + QCAP, NP-hard (Non-deterministic polynomial-time hardness) combinatorial problem, where decision to assign available quays each vessel adds ...